29 files changed, 1386 insertions, 614 deletions
diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index b4a4703..e56ece9 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -12,10 +12,10 @@ else (STORAGE_unqlite)
 endif (STORAGE_unqlite)
 set(command_SRCS
+    modelresult.cpp
    definitions.cpp
    log.cpp
    entitybuffer.cpp
-    entitystorage.cpp
    clientapi.cpp
    facadefactory.cpp
    commands.cpp
@@ -26,6 +26,7 @@ set(command_SRCS
    resource.cpp
    genericresource.cpp
    resourceaccess.cpp
+    queryrunner.cpp
    listener.cpp
    storage_common.cpp
    threadboundary.cpp
@@ -36,6 +37,7 @@ set(command_SRCS
    domain/applicationdomaintype.cpp
    domain/event.cpp
    domain/mail.cpp
+    domain/folder.cpp
    ${storage_SRCS})
 add_library(${PROJECT_NAME} SHARED ${command_SRCS})
@@ -55,6 +57,8 @@ generate_flatbuffers(
    commands/revisionreplayed
    domain/event
    domain/mail
+    domain/folder
+    domain/dummy
    entity
    metadata
    queuedcommand
@@ -70,12 +74,6 @@ install(FILES
    clientapi.h
    domain/applicationdomaintype.h
    query.h
-    threadboundary.h
-    resultprovider.h
-    facadefactory.h
-    log.h
-    listmodelresult.h
    bufferadaptor.h
-    facadeinterface.h
    DESTINATION ${INCLUDE_INSTALL_DIR}/${PROJECT_NAME} COMPONENT Devel
 )
diff --git a/common/clientapi.cpp b/common/clientapi.cpp
index f99ebb8..29b7e68 100644
--- a/common/clientapi.cpp
+++ b/common/clientapi.cpp
@@ -1,19 +1,47 @@
+/*
+ * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) version 3, or any
+ * later version accepted by the membership of KDE e.V. (or its
+ * successor approved by the membership of KDE e.V.), which shall
+ * act as a proxy defined in Section 6 of version 3 of the license.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include "clientapi.h"
+#include <QtConcurrent/QtConcurrentRun>
+#include <QTimer>
+#include <QEventLoop>
+#include <QAbstractItemModel>
+#include <functional>
+#include <memory>
 #include "resourceaccess.h"
 #include "commands.h"
 #include "resourcefacade.h"
 #include "log.h"
 #include "definitions.h"
 #include "resourceconfig.h"
-#include <QtConcurrent/QtConcurrentRun>
+#include "facadefactory.h"
-#include <QTimer>
+#include "modelresult.h"
+#include "log.h"
 #define ASYNCINTHREAD
 namespace async
 {
-    void run(const std::function<void()> &runner) {
+    static void run(const std::function<void()> &runner) {
        auto timer = new QTimer();
        timer->setSingleShot(true);
        QObject::connect(timer, &QTimer::timeout, [runner, timer]() {
@@ -69,6 +97,76 @@ QList<QByteArray> Store::getResources(const QList<QByteArray> &resourceFilter, c
    return resources;
 }
+template <class DomainType>
+QSharedPointer<QAbstractItemModel> Store::loadModel(Query query)
+{
+    auto model = QSharedPointer<ModelResult<DomainType, typename DomainType::Ptr> >::create(query, query.requestedProperties.toList());
+    //* Client defines lifetime of model
+    //* The model lifetime defines the duration of live-queries
+    //* The facade needs to life for the duration of any calls being made (assuming we get rid of any internal callbacks
+    //* The emitter needs to live or the duration of query (respectively, the model)
+    //* The result provider needs to live for as long as results are provided (until the last thread exits).
+    // Query all resources and aggregate results
+    KAsync::iterate(getResources(query.resources, ApplicationDomain::getTypeName<DomainType>()))
+    .template each<void, QByteArray>([query, model](const QByteArray &resource, KAsync::Future<void> &future) {
+        auto facade = FacadeFactory::instance().getFacade<DomainType>(resourceName(resource), resource);
+        if (facade) {
+            Trace() << "Trying to fetch from resource";
+            auto result = facade->load(query);
+            auto emitter = result.second;
+            //TODO use aggregating emitter instead
+            model->setEmitter(emitter);
+            model->fetchMore(QModelIndex());
+            result.first.template then<void>([&future](){future.setFinished();}).exec();
+        } else {
+            //Ignore the error and carry on
+            future.setFinished();
+        }
+    }).exec();
+    return model;
+}
+template <class DomainType>
+static std::shared_ptr<StoreFacade<DomainType> > getFacade(const QByteArray &resourceInstanceIdentifier)
+{
+    if (auto facade = FacadeFactory::instance().getFacade<DomainType>(resourceName(resourceInstanceIdentifier), resourceInstanceIdentifier)) {
+        return facade;
+    }
+    return std::make_shared<NullFacade<DomainType> >();
+}
+template <class DomainType>
+KAsync::Job<void> Store::create(const DomainType &domainObject) {
+    //Potentially move to separate thread as well
+    auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
+    return facade->create(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
+        Warning() << "Failed to create";
+    });
+}
+template <class DomainType>
+KAsync::Job<void> Store::modify(const DomainType &domainObject)
+{
+    //Potentially move to separate thread as well
+    auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
+    return facade->modify(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
+        Warning() << "Failed to modify";
+    });
+}
+template <class DomainType>
+KAsync::Job<void> Store::remove(const DomainType &domainObject)
+{
+    //Potentially move to separate thread as well
+    auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
+    return facade->remove(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
+        Warning() << "Failed to remove";
+    });
+}
 KAsync::Job<void> Store::shutdown(const QByteArray &identifier)
 {
    Trace() << "shutdown";
@@ -95,7 +193,7 @@ KAsync::Job<void> Store::synchronize(const Akonadi2::Query &query)
    .template each<void, QByteArray>([query](const QByteArray &resource, KAsync::Future<void> &future) {
        auto resourceAccess = QSharedPointer<Akonadi2::ResourceAccess>::create(resource);
        resourceAccess->open();
-        resourceAccess->synchronizeResource(true, false).then<void>([&future]() {
+        resourceAccess->synchronizeResource(query.syncOnDemand, query.processAll).then<void>([&future, resourceAccess]() {
            future.setFinished();
        }).exec();
    })
@@ -103,4 +201,15 @@ KAsync::Job<void> Store::synchronize(const Akonadi2::Query &query)
    .template then<void>([](){});
 }
+#define REGISTER_TYPE(T) template KAsync::Job<void> Store::remove<T>(const T &domainObject); \
+    template KAsync::Job<void> Store::create<T>(const T &domainObject); \
+    template KAsync::Job<void> Store::modify<T>(const T &domainObject); \
+    template QSharedPointer<QAbstractItemModel> Store::loadModel<T>(Query query); \
+REGISTER_TYPE(ApplicationDomain::Event);
+REGISTER_TYPE(ApplicationDomain::Mail);
+REGISTER_TYPE(ApplicationDomain::Folder);
+REGISTER_TYPE(ApplicationDomain::AkonadiResource);
 } // namespace Akonadi2
diff --git a/common/clientapi.h b/common/clientapi.h
index 9a32188..8f87562 100644
--- a/common/clientapi.h
+++ b/common/clientapi.h
@@ -22,28 +22,16 @@
 #include <QString>
 #include <QSharedPointer>
-#include <QEventLoop>
-#include <functional>
-#include <memory>
 #include <Async/Async>
 #include "query.h"
-#include "resultprovider.h"
 #include "applicationdomaintype.h"
-#include "facadefactory.h"
-#include "log.h"
-namespace async {
+class QAbstractItemModel;
-    //This should abstract if we execute from eventloop or in thread.
-    //It supposed to allow the caller to finish the current method before executing the runner.
-    void run(const std::function<void()> &runner);
-}
 namespace Akonadi2 {
-using namespace async;
 /**
 * Store interface used in the client API.
 */
@@ -55,77 +43,22 @@ public:
    static QString storageLocation();
    static QByteArray resourceName(const QByteArray &instanceIdentifier);
-    /**
+    enum Roles {
-     * Asynchronusly load a dataset
+        DomainObjectRole = Qt::UserRole + 1, //Must be the same as in ModelResult
-     */
+        ChildrenFetchedRole
-    template <class DomainType>
+    };
-    static QSharedPointer<ResultEmitter<typename DomainType::Ptr> > load(Query query)
-    {
-        auto resultSet = QSharedPointer<ResultProvider<typename DomainType::Ptr> >::create();
-        //Execute the search in a thread.
-        //We must guarantee that the emitter is returned before the first result is emitted.
-        //The result provider must be threadsafe.
-        async::run([query, resultSet](){
-            QEventLoop eventLoop;
-            resultSet->onDone([&eventLoop](){
-                eventLoop.quit();
-            });
-            // Query all resources and aggregate results
-            KAsync::iterate(getResources(query.resources, ApplicationDomain::getTypeName<DomainType>()))
-            .template each<void, QByteArray>([query, resultSet](const QByteArray &resource, KAsync::Future<void> &future) {
-                auto facade = FacadeFactory::instance().getFacade<DomainType>(resourceName(resource), resource);
-                if (facade) {
-                    facade->load(query, resultSet).template then<void>([&future](){future.setFinished();}).exec();
-                    //Keep the facade alive for the lifetime of the resultSet.
-                    resultSet->setFacade(facade);
-                } else {
-                    //Ignore the error and carry on
-                    future.setFinished();
-                }
-            }).template then<void>([query, resultSet]() {
-                resultSet->initialResultSetComplete();
-                if (!query.liveQuery) {
-                    resultSet->complete();
-                }
-            }).exec();
-            //Keep the thread alive until the result is ready
-            if (!resultSet->isDone()) {
-                eventLoop.exec();
-            }
-        });
-        return resultSet->emitter();
-    }
    /**
     * Asynchronusly load a dataset with tree structure information
     */
-    // template <class DomainType>
-    // static TreeSet<DomainType> loadTree(Query)
-    // {
-    // }
    template <class DomainType>
-    static std::shared_ptr<StoreFacade<DomainType> > getFacade(const QByteArray &resourceInstanceIdentifier)
+    static QSharedPointer<QAbstractItemModel> loadModel(Query query);
-    {
-        if (auto facade = FacadeFactory::instance().getFacade<DomainType>(resourceName(resourceInstanceIdentifier), resourceInstanceIdentifier)) {
-            return facade;
-        }
-        return std::make_shared<NullFacade<DomainType> >();
-    }
    /**
     * Create a new entity.
     */
    template <class DomainType>
-    static KAsync::Job<void> create(const DomainType &domainObject) {
+    static KAsync::Job<void> create(const DomainType &domainObject);
-        //Potentially move to separate thread as well
-        auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
-        return facade->create(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
-            Warning() << "Failed to create";
-        });
-    }
    /**
     * Modify an entity.
@@ -133,25 +66,13 @@ public:
     * This includes moving etc. since these are also simple settings on a property.
     */
    template <class DomainType>
-    static KAsync::Job<void> modify(const DomainType &domainObject) {
+    static KAsync::Job<void> modify(const DomainType &domainObject);
-        //Potentially move to separate thread as well
-        auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
-        return facade->modify(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
-            Warning() << "Failed to modify";
-        });
-    }
    /**
     * Remove an entity.
     */
    template <class DomainType>
-    static KAsync::Job<void> remove(const DomainType &domainObject) {
+    static KAsync::Job<void> remove(const DomainType &domainObject);
-        //Potentially move to separate thread as well
-        auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
-        return facade->remove(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
-            Warning() << "Failed to remove";
-        });
-    }
    /**
     * Shutdown resource.
diff --git a/common/domain/applicationdomaintype.cpp b/common/domain/applicationdomaintype.cpp
index 1b5d870..c9a8bba 100644
--- a/common/domain/applicationdomaintype.cpp
+++ b/common/domain/applicationdomaintype.cpp
@@ -60,10 +60,13 @@ ApplicationDomainType& ApplicationDomainType::operator=(const ApplicationDomainT
    return *this;
 }
-ApplicationDomainType::~ApplicationDomainType() {}
+ApplicationDomainType::~ApplicationDomainType()
+{
+}
 QVariant ApplicationDomainType::getProperty(const QByteArray &key) const
 {
+    Q_ASSERT(mAdaptor);
    if (!mAdaptor->availableProperties().contains(key)) {
        Warning() << "No such property available " << key;
    }
@@ -72,7 +75,9 @@ QVariant ApplicationDomainType::getProperty(const QByteArray &key) const
 void ApplicationDomainType::setProperty(const QByteArray &key, const QVariant &value)
 {
-    mChangeSet.insert(key, value); mAdaptor->setProperty(key, value);
+    Q_ASSERT(mAdaptor);
+    mChangeSet.insert(key, value);
+    mAdaptor->setProperty(key, value);
 }
 QByteArrayList ApplicationDomainType::changedProperties() const
diff --git a/common/domain/applicationdomaintype.h b/common/domain/applicationdomaintype.h
index 5514d26..227ab4d 100644
--- a/common/domain/applicationdomaintype.h
+++ b/common/domain/applicationdomaintype.h
@@ -160,3 +160,7 @@ Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::Event)
 Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::Event::Ptr)
 Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::Mail)
 Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::Mail::Ptr)
+Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::Folder)
+Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::Folder::Ptr)
+Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::AkonadiResource)
+Q_DECLARE_METATYPE(Akonadi2::ApplicationDomain::AkonadiResource::Ptr)
diff --git a/common/domain/dummy.fbs b/common/domain/dummy.fbs
new file mode 100644
index 0000000..8816b09
--- /dev/null
+++ b/common/domain/dummy.fbs
@@ -0,0 +1,7 @@
+namespace Akonadi2.ApplicationDomain.Buffer;
+table Dummy {
+}
+root_type Dummy;
+file_identifier "AKFB";
diff --git a/common/domain/event.cpp b/common/domain/event.cpp
index 87e13bc..42c13e2 100644
--- a/common/domain/event.cpp
+++ b/common/domain/event.cpp
@@ -47,6 +47,7 @@ ResultSet TypeImplementation<Event>::queryIndexes(const Akonadi2::Query &query,
        });
        appliedFilters << "uid";
    }
+    Trace() << "Index lookup found " << keys.size() << " keys.";
    return ResultSet(keys);
 }
diff --git a/common/domain/folder.cpp b/common/domain/folder.cpp
new file mode 100644
index 0000000..989d2c4
--- /dev/null
+++ b/common/domain/folder.cpp
@@ -0,0 +1,100 @@
+/*
+ *   Copyright (C) 2015 Christian Mollekopf <chrigi_1@fastfolder.fm>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+#include "folder.h"
+#include <QVector>
+#include <QByteArray>
+#include <QString>
+#include "../resultset.h"
+#include "../index.h"
+#include "../storage.h"
+#include "../log.h"
+#include "../propertymapper.h"
+#include "../query.h"
+#include "../definitions.h"
+#include "folder_generated.h"
+using namespace Akonadi2::ApplicationDomain;
+ResultSet TypeImplementation<Folder>::queryIndexes(const Akonadi2::Query &query, const QByteArray &resourceInstanceIdentifier, QSet<QByteArray> &appliedFilters, Akonadi2::Storage::Transaction &transaction)
+{
+    QVector<QByteArray> keys;
+    if (query.propertyFilter.contains("parent")) {
+        Index index("folder.index.parent", transaction);
+        auto lookupKey = query.propertyFilter.value("parent").toByteArray();
+        if (lookupKey.isEmpty()) {
+            lookupKey = "toplevel";
+        }
+        index.lookup(lookupKey, [&](const QByteArray &value) {
+            keys << value;
+        },
+        [](const Index::Error &error) {
+            Warning() << "Error in uid index: " <<  error.message;
+        });
+        appliedFilters << "parent";
+    }
+    Trace() << "Index lookup found " << keys.size() << " keys.";
+    return ResultSet(keys);
+}
+void TypeImplementation<Folder>::index(const QByteArray &identifier, const BufferAdaptor &bufferAdaptor, Akonadi2::Storage::Transaction &transaction)
+{
+    const auto parent = bufferAdaptor.getProperty("parent");
+    Trace() << "indexing " << identifier << " with parent " << parent.toByteArray();
+    if (parent.isValid()) {
+        Q_ASSERT(!parent.toByteArray().isEmpty());
+        Index("folder.index.parent", transaction).add(parent.toByteArray(), identifier);
+    } else {
+        Index("folder.index.parent", transaction).add("toplevel", identifier);
+    }
+}
+void TypeImplementation<Folder>::removeIndex(const QByteArray &identifier, const BufferAdaptor &bufferAdaptor, Akonadi2::Storage::Transaction &transaction)
+{
+    const auto parent = bufferAdaptor.getProperty("parent");
+    if (parent.isValid()) {
+        Index("folder.index.parent", transaction).remove(parent.toByteArray(), identifier);
+    } else {
+        Index("folder.index.parent", transaction).remove("toplevel", identifier);
+    }
+}
+QSharedPointer<ReadPropertyMapper<TypeImplementation<Folder>::Buffer> > TypeImplementation<Folder>::initializeReadPropertyMapper()
+{
+    auto propertyMapper = QSharedPointer<ReadPropertyMapper<Buffer> >::create();
+    propertyMapper->addMapping<QString, Buffer>("parent", &Buffer::parent);
+    propertyMapper->addMapping<QString, Buffer>("name", &Buffer::name);
+    return propertyMapper;
+}
+QSharedPointer<WritePropertyMapper<TypeImplementation<Folder>::BufferBuilder> > TypeImplementation<Folder>::initializeWritePropertyMapper()
+{
+    auto propertyMapper = QSharedPointer<WritePropertyMapper<BufferBuilder> >::create();
+    propertyMapper->addMapping("parent", [](const QVariant &value, flatbuffers::FlatBufferBuilder &fbb) -> std::function<void(BufferBuilder &)> {
+        auto offset = variantToProperty<QString>(value, fbb);
+        return [offset](BufferBuilder &builder) { builder.add_parent(offset); };
+    });
+    propertyMapper->addMapping("name", [](const QVariant &value, flatbuffers::FlatBufferBuilder &fbb) -> std::function<void(BufferBuilder &)> {
+        auto offset = variantToProperty<QString>(value, fbb);
+        return [offset](BufferBuilder &builder) { builder.add_name(offset); };
+    });
+    return propertyMapper;
+}
diff --git a/common/domain/folder.fbs b/common/domain/folder.fbs
new file mode 100644
index 0000000..3476d58
--- /dev/null
+++ b/common/domain/folder.fbs
@@ -0,0 +1,9 @@
+namespace Akonadi2.ApplicationDomain.Buffer;
+table Folder {
+  name:string;
+  parent:string;
+}
+root_type Folder;
+file_identifier "AKFB";
diff --git a/common/domain/folder.h b/common/domain/folder.h
new file mode 100644
index 0000000..545836f
--- /dev/null
+++ b/common/domain/folder.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2015 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+#pragma once
+#include "applicationdomaintype.h"
+#include "storage.h"
+class ResultSet;
+class QByteArray;
+template<typename T>
+class ReadPropertyMapper;
+template<typename T>
+class WritePropertyMapper;
+namespace Akonadi2 {
+    class Query;
+namespace ApplicationDomain {
+    namespace Buffer {
+        struct Folder;
+        struct FolderBuilder;
+    }
+template<>
+class TypeImplementation<Akonadi2::ApplicationDomain::Folder> {
+public:
+    typedef Akonadi2::ApplicationDomain::Buffer::Folder Buffer;
+    typedef Akonadi2::ApplicationDomain::Buffer::FolderBuilder BufferBuilder;
+    static QSet<QByteArray> indexedProperties();
+    static ResultSet queryIndexes(const Akonadi2::Query &query, const QByteArray &resourceInstanceIdentifier, QSet<QByteArray> &appliedFilters, Akonadi2::Storage::Transaction &transaction);
+    static void index(const QByteArray &identifier, const BufferAdaptor &bufferAdaptor, Akonadi2::Storage::Transaction &transaction);
+    static void removeIndex(const QByteArray &identifier, const BufferAdaptor &bufferAdaptor, Akonadi2::Storage::Transaction &transaction);
+    static QSharedPointer<ReadPropertyMapper<Buffer> > initializeReadPropertyMapper();
+    static QSharedPointer<WritePropertyMapper<BufferBuilder> > initializeWritePropertyMapper();
+};
+}
+}
diff --git a/common/domainadaptor.h b/common/domainadaptor.h
index b14fbcd..b541e23 100644
--- a/common/domainadaptor.h
+++ b/common/domainadaptor.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *   Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
@@ -23,9 +23,11 @@
 #include <QByteArray>
 #include <functional>
+#include "domaintypeadaptorfactoryinterface.h"
 #include "domain/applicationdomaintype.h"
 #include "domain/event.h"
 #include "domain/mail.h"
+#include "domain/folder.h"
 #include "bufferadaptor.h"
 #include "entity_generated.h"
 #include "metadata_generated.h"
@@ -123,15 +125,6 @@ public:
    QSharedPointer<ReadPropertyMapper<ResourceBuffer> > mResourceMapper;
 };
-class DomainTypeAdaptorFactoryInterface
-{
-public:
-    typedef QSharedPointer<DomainTypeAdaptorFactoryInterface> Ptr;
-    virtual ~DomainTypeAdaptorFactoryInterface() {};
-    virtual QSharedPointer<Akonadi2::ApplicationDomain::BufferAdaptor> createAdaptor(const Akonadi2::Entity &entity) = 0;
-    virtual void createBuffer(const Akonadi2::ApplicationDomain::ApplicationDomainType &domainType, flatbuffers::FlatBufferBuilder &fbb, void const *metadataData = 0, size_t metadataSize = 0) = 0;
-};
 /**
 * The factory should define how to go from an entitybuffer (local + resource buffer), to a domain type adapter.
 * It defines how values are split accross local and resource buffer.
diff --git a/common/domaintypeadaptorfactoryinterface.h b/common/domaintypeadaptorfactoryinterface.h
new file mode 100644
index 0000000..8c99aa1
--- /dev/null
+++ b/common/domaintypeadaptorfactoryinterface.h
@@ -0,0 +1,42 @@
+/*
+ *   Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+#pragma once
+#include <QSharedPointer>
+namespace Akonadi2 {
+    namespace ApplicationDomain {
+        class BufferAdaptor;
+        class ApplicationDomainType;
+    }
+    struct Entity;
+}
+namespace flatbuffers {
+    class FlatBufferBuilder;
+}
+class DomainTypeAdaptorFactoryInterface
+{
+public:
+    typedef QSharedPointer<DomainTypeAdaptorFactoryInterface> Ptr;
+    virtual ~DomainTypeAdaptorFactoryInterface() {};
+    virtual QSharedPointer<Akonadi2::ApplicationDomain::BufferAdaptor> createAdaptor(const Akonadi2::Entity &entity) = 0;
+    virtual void createBuffer(const Akonadi2::ApplicationDomain::ApplicationDomainType &domainType, flatbuffers::FlatBufferBuilder &fbb, void const *metadataData = 0, size_t metadataSize = 0) = 0;
+};
diff --git a/common/entitystorage.cpp b/common/entitystorage.cpp
deleted file mode 100644
index 5d4df9f..0000000
--- a/common/entitystorage.cpp
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
- *
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program; if not, write to the
- *   Free Software Foundation, Inc.,
- *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
- */
-#include "entitystorage.h"
-ResultSet EntityStorageBase::filteredSet(const ResultSet &resultSet, const std::function<bool(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject)> &filter, const Akonadi2::Storage::Transaction &transaction, bool initialQuery)
-{
-    auto resultSetPtr = QSharedPointer<ResultSet>::create(resultSet);
-    //Read through the source values and return whatever matches the filter
-    std::function<bool(std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)>)> generator = [this, resultSetPtr, &transaction, filter, initialQuery](std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)> callback) -> bool {
-        while (resultSetPtr->next()) {
-            readEntity(transaction, resultSetPtr->id(), [this, filter, callback, initialQuery](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject, Akonadi2::Operation operation) {
-                //Always remove removals, they probably don't match due to non-available properties
-                if (filter(domainObject) || operation == Akonadi2::Operation_Removal) {
-                    if (initialQuery) {
-                        //We're not interested in removals during the initial query
-                        if (operation != Akonadi2::Operation_Removal) {
-                            callback(domainObject, Akonadi2::Operation_Creation);
-                        }
-                    } else {
-                        callback(domainObject, operation);
-                    }
-                }
-            });
-        }
-        return false;
-    };
-    return ResultSet(generator);
-}
-ResultSet EntityStorageBase::getResultSet(const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, qint64 baseRevision)
-{
-    QSet<QByteArray> remainingFilters = query.propertyFilter.keys().toSet();
-    ResultSet resultSet;
-    const bool initialQuery = (baseRevision == 1);
-    if (initialQuery) {
-        Trace() << "Initial result set update";
-        resultSet = loadInitialResultSet(query, transaction, remainingFilters);
-    } else {
-        //TODO fallback in case the old revision is no longer available to clear + redo complete initial scan
-        Trace() << "Incremental result set update" << baseRevision;
-        resultSet = loadIncrementalResultSet(baseRevision, query, transaction, remainingFilters);
-    }
-    auto filter = [remainingFilters, query, baseRevision](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject) -> bool {
-        for (const auto &filterProperty : remainingFilters) {
-            //TODO implement other comparison operators than equality
-            if (domainObject->getProperty(filterProperty) != query.propertyFilter.value(filterProperty)) {
-                return false;
-            }
-        }
-        return true;
-    };
-    return filteredSet(resultSet, filter, transaction, initialQuery);
-}
diff --git a/common/entitystorage.h b/common/entitystorage.h
deleted file mode 100644
index 8e73083..0000000
--- a/common/entitystorage.h
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
- *
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program; if not, write to the
- *   Free Software Foundation, Inc.,
- *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
- */
-#pragma once
-#include <QByteArray>
-#include "query.h"
-#include "domainadaptor.h"
-#include "entitybuffer.h"
-#include "log.h"
-#include "storage.h"
-#include "resultset.h"
-#include "resultprovider.h"
-#include "definitions.h"
-/**
- * Wraps storage, entity adaptor factory and indexes into one.
- * 
- */
-class EntityStorageBase
-{
-public:
-    typedef std::function<ResultSet (const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters)> InitialResultLoader;
-    typedef std::function<ResultSet (qint64 baseRevision, const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters)> IncrementalResultLoader;
-    typedef std::function<void(const Akonadi2::Storage::Transaction &transaction, const QByteArray &key, const std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)> &resultCallback)> EntityReader;
-    /**
-     * Returns the initial result set that still needs to be filtered.
-     *
-     * To make this efficient indexes should be chosen that are as selective as possible.
-     */
-    InitialResultLoader loadInitialResultSet;
-    /**
-     * Returns the incremental result set that still needs to be filtered.
-     */
-    IncrementalResultLoader loadIncrementalResultSet;
-    /**
-     * Loads a single entity by uid from storage.
-     */
-    EntityReader readEntity;
-protected:
-    EntityStorageBase(const QByteArray &instanceIdentifier)
-        : mResourceInstanceIdentifier(instanceIdentifier)
-    {
-    }
-    virtual Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr copy(const Akonadi2::ApplicationDomain::ApplicationDomainType &) = 0;
-    ResultSet getResultSet(const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, qint64 baseRevision);
-    QByteArray mResourceInstanceIdentifier;
-private:
-    ResultSet filteredSet(const ResultSet &resultSet, const std::function<bool(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject)> &filter, const Akonadi2::Storage::Transaction &transaction, bool isInitialQuery);
-};
-template<typename DomainType>
-class EntityStorage : public EntityStorageBase
-{
-public:
-    EntityStorage(const QByteArray &instanceIdentifier)
-        : EntityStorageBase(instanceIdentifier)
-    {
-    }
-protected:
-    Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr copy(const Akonadi2::ApplicationDomain::ApplicationDomainType &object) Q_DECL_OVERRIDE
-    {
-        return Akonadi2::ApplicationDomain::ApplicationDomainType::getInMemoryRepresentation<DomainType>(object);
-    }
-public:
-    virtual qint64 read(const Akonadi2::Query &query, qint64 baseRevision, const QSharedPointer<Akonadi2::ResultProvider<typename DomainType::Ptr> > &resultProvider)
-    {
-        Akonadi2::Storage storage(Akonadi2::storageLocation(), mResourceInstanceIdentifier);
-        storage.setDefaultErrorHandler([](const Akonadi2::Storage::Error &error) {
-            Warning() << "Error during query: " << error.store << error.message;
-        });
-        auto transaction = storage.createTransaction(Akonadi2::Storage::ReadOnly);
-        Log() << "Querying" << baseRevision << Akonadi2::Storage::maxRevision(transaction);
-        auto resultSet = getResultSet(query, transaction, baseRevision);
-        while(resultSet.next([this, resultProvider](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &value, Akonadi2::Operation operation) -> bool {
-            switch (operation) {
-            case Akonadi2::Operation_Creation:
-                Trace() << "Got creation";
-                resultProvider->add(copy(*value).template staticCast<DomainType>());
-                break;
-            case Akonadi2::Operation_Modification:
-                Trace() << "Got modification";
-                resultProvider->modify(copy(*value).template staticCast<DomainType>());
-                break;
-            case Akonadi2::Operation_Removal:
-                Trace() << "Got removal";
-                resultProvider->remove(copy(*value).template staticCast<DomainType>());
-                break;
-            }
-            return true;
-        })){};
-        return Akonadi2::Storage::maxRevision(transaction);
-    }
-};
diff --git a/common/facade.cpp b/common/facade.cpp
index e51b32a..1d6b9a7 100644
--- a/common/facade.cpp
+++ b/common/facade.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2015 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *   Copyright (C) 2015 Christian Mollekopf <chrigi_1@fastmail.fm>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
@@ -18,3 +18,82 @@
 */
 #include "facade.h"
+#include "commands.h"
+#include "log.h"
+#include "storage.h"
+#include "definitions.h"
+#include "domainadaptor.h"
+#include "queryrunner.h"
+using namespace Akonadi2;
+template<class DomainType>
+GenericFacade<DomainType>::GenericFacade(const QByteArray &resourceIdentifier, const DomainTypeAdaptorFactoryInterface::Ptr &adaptorFactory , const QSharedPointer<Akonadi2::ResourceAccessInterface> resourceAccess)
+    : Akonadi2::StoreFacade<DomainType>(),
+    mResourceAccess(resourceAccess),
+    mDomainTypeAdaptorFactory(adaptorFactory),
+    mResourceInstanceIdentifier(resourceIdentifier)
+{
+    if (!mResourceAccess) {
+        mResourceAccess = QSharedPointer<Akonadi2::ResourceAccess>::create(resourceIdentifier);
+    }
+}
+template<class DomainType>
+GenericFacade<DomainType>::~GenericFacade()
+{
+}
+template<class DomainType>
+QByteArray GenericFacade<DomainType>::bufferTypeForDomainType()
+{
+    //We happen to have a one to one mapping
+    return Akonadi2::ApplicationDomain::getTypeName<DomainType>();
+}
+template<class DomainType>
+KAsync::Job<void> GenericFacade<DomainType>::create(const DomainType &domainObject)
+{
+    if (!mDomainTypeAdaptorFactory) {
+        Warning() << "No domain type adaptor factory available";
+        return KAsync::error<void>();
+    }
+    flatbuffers::FlatBufferBuilder entityFbb;
+    mDomainTypeAdaptorFactory->createBuffer(domainObject, entityFbb);
+    return mResourceAccess->sendCreateCommand(bufferTypeForDomainType(), QByteArray::fromRawData(reinterpret_cast<const char*>(entityFbb.GetBufferPointer()), entityFbb.GetSize()));
+}
+template<class DomainType>
+KAsync::Job<void> GenericFacade<DomainType>::modify(const DomainType &domainObject)
+{
+    if (!mDomainTypeAdaptorFactory) {
+        Warning() << "No domain type adaptor factory available";
+        return KAsync::error<void>();
+    }
+    flatbuffers::FlatBufferBuilder entityFbb;
+    mDomainTypeAdaptorFactory->createBuffer(domainObject, entityFbb);
+    return mResourceAccess->sendModifyCommand(domainObject.identifier(), domainObject.revision(), bufferTypeForDomainType(), QByteArrayList(), QByteArray::fromRawData(reinterpret_cast<const char*>(entityFbb.GetBufferPointer()), entityFbb.GetSize()));
+}
+template<class DomainType>
+KAsync::Job<void> GenericFacade<DomainType>::remove(const DomainType &domainObject)
+{
+    return mResourceAccess->sendDeleteCommand(domainObject.identifier(), domainObject.revision(), bufferTypeForDomainType());
+}
+template<class DomainType>
+QPair<KAsync::Job<void>, typename ResultEmitter<typename DomainType::Ptr>::Ptr> GenericFacade<DomainType>::load(const Akonadi2::Query &query)
+{
+    //The runner lives for the lifetime of the query
+    auto runner = new QueryRunner<DomainType>(query, mResourceAccess, mResourceInstanceIdentifier, mDomainTypeAdaptorFactory, bufferTypeForDomainType());
+    return qMakePair(KAsync::null<void>(), runner->emitter());
+}
+template class Akonadi2::GenericFacade<Akonadi2::ApplicationDomain::Folder>;
+template class Akonadi2::GenericFacade<Akonadi2::ApplicationDomain::Mail>;
+template class Akonadi2::GenericFacade<Akonadi2::ApplicationDomain::Event>;
+#include "facade.moc"
diff --git a/common/facade.h b/common/facade.h
index 643ebec..de67e05 100644
--- a/common/facade.h
+++ b/common/facade.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *   Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
@@ -25,85 +25,12 @@
 #include <Async/Async>
 #include "resourceaccess.h"
-#include "commands.h"
-#include "domainadaptor.h"
-#include "log.h"
 #include "resultset.h"
-#include "entitystorage.h"
+#include "domaintypeadaptorfactoryinterface.h"
+#include "storage.h"
-/**
- * A QueryRunner runs a query and updates the corresponding result set.
- * 
- * The lifetime of the QueryRunner is defined by the resut set (otherwise it's doing useless work),
- * and by how long a result set must be updated. If the query is one off the runner dies after the execution,
- * otherwise it lives on the react to changes and updates the corresponding result set.
- * 
- * QueryRunner has to keep ResourceAccess alive in order to keep getting updates.
- */
-class QueryRunner : public QObject
-{
-    Q_OBJECT
-public:
-    typedef std::function<KAsync::Job<qint64>(qint64 oldRevision)> QueryFunction;
-    QueryRunner(const Akonadi2::Query &query) : mLatestRevision(0) {};
-    /**
-     * Starts query
-     */
-    KAsync::Job<void> run(qint64 newRevision = 0)
-    {
-        //TODO: JOBAPI: that last empty .then should not be necessary
-        //TODO: remove newRevision
-        return queryFunction(mLatestRevision + 1).then<void, qint64>([this](qint64 revision) {
-            mLatestRevision = revision;
-        }).then<void>([](){});
-    }
-    /**
-     * Set the query to run
-     */
-    void setQuery(const QueryFunction &query)
-    {
-        queryFunction = query;
-    }
-public slots:
-    /**
-     * Rerun query with new revision
-     */
-    void revisionChanged(qint64 newRevision)
-    {
-        Trace() << "New revision: " << newRevision;
-        run(newRevision).exec();
-    }
-private:
-    QueryFunction queryFunction;
-    qint64 mLatestRevision;
-};
-static inline ResultSet fullScan(const Akonadi2::Storage::Transaction &transaction, const QByteArray &bufferType)
-{
-    //TODO use a result set with an iterator, to read values on demand
-    QVector<QByteArray> keys;
-    transaction.openDatabase(bufferType + ".main").scan(QByteArray(), [&](const QByteArray &key, const QByteArray &value) -> bool {
-        //Skip internals
-        if (Akonadi2::Storage::isInternalKey(key)) {
-            return true;
-        }
-        keys << Akonadi2::Storage::uidFromKey(key);
-        return true;
-    },
-    [](const Akonadi2::Storage::Error &error) {
-        qWarning() << "Error during query: " << error.message;
-    });
-    Trace() << "Full scan found " << keys.size() << " results";
-    return ResultSet(keys);
-}
 namespace Akonadi2 {
 /**
 * Default facade implementation for resources that are implemented in a separate process using the ResourceAccess class.
 * 
@@ -125,185 +52,18 @@ public:
     * @param resourceIdentifier is the identifier of the resource instance
     * @param adaptorFactory is the adaptor factory used to generate the mappings from domain to resource types and vice versa
     */
-    GenericFacade(const QByteArray &resourceIdentifier, const DomainTypeAdaptorFactoryInterface::Ptr &adaptorFactory = DomainTypeAdaptorFactoryInterface::Ptr(), const QSharedPointer<EntityStorage<DomainType> > storage = QSharedPointer<EntityStorage<DomainType> >(), const QSharedPointer<Akonadi2::ResourceAccessInterface> resourceAccess = QSharedPointer<Akonadi2::ResourceAccessInterface>())
+    GenericFacade(const QByteArray &resourceIdentifier, const DomainTypeAdaptorFactoryInterface::Ptr &adaptorFactory = DomainTypeAdaptorFactoryInterface::Ptr(), const QSharedPointer<Akonadi2::ResourceAccessInterface> resourceAccess = QSharedPointer<Akonadi2::ResourceAccessInterface>());
-        : Akonadi2::StoreFacade<DomainType>(),
+    ~GenericFacade();
-        mResourceAccess(resourceAccess),
-        mStorage(storage),
-        mDomainTypeAdaptorFactory(adaptorFactory),
-        mResourceInstanceIdentifier(resourceIdentifier)
-    {
-        if (!mResourceAccess) {
-            mResourceAccess = QSharedPointer<Akonadi2::ResourceAccess>::create(resourceIdentifier);
-        }
-        if (!mStorage) {
-            mStorage = QSharedPointer<EntityStorage<DomainType> >::create(resourceIdentifier);
-            const auto bufferType = bufferTypeForDomainType();
-            mStorage->readEntity = [bufferType, this] (const Akonadi2::Storage::Transaction &transaction, const QByteArray &key, const std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)> &resultCallback)
-            {
-                //This only works for a 1:1 mapping of resource to domain types.
-                //Not i.e. for tags that are stored as flags in each entity of an imap store.
-                //additional properties that don't have a 1:1 mapping (such as separately stored tags),
-                //could be added to the adaptor.
-                transaction.openDatabase(bufferType + ".main").findLatest(key, [=](const QByteArray &key, const QByteArray &value) -> bool {
-                    Akonadi2::EntityBuffer buffer(value.data(), value.size());
-                    const Akonadi2::Entity &entity = buffer.entity();
-                    const auto metadataBuffer = Akonadi2::EntityBuffer::readBuffer<Akonadi2::Metadata>(entity.metadata());
-                    Q_ASSERT(metadataBuffer);
-                    const qint64 revision = metadataBuffer ? metadataBuffer->revision() : -1;
-                    resultCallback(DomainType::Ptr::create(mResourceInstanceIdentifier, Akonadi2::Storage::uidFromKey(key), revision, mDomainTypeAdaptorFactory->createAdaptor(entity)), metadataBuffer->operation());
-                    return false;
-                },
-                [](const Akonadi2::Storage::Error &error) {
-                    qWarning() << "Error during query: " << error.message;
-                });
-            };
-            mStorage->loadInitialResultSet = [bufferType, this] (const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters) -> ResultSet
-            {
-                QSet<QByteArray> appliedFilters;
-                auto resultSet = Akonadi2::ApplicationDomain::TypeImplementation<DomainType>::queryIndexes(query, mResourceInstanceIdentifier, appliedFilters, transaction);
-                remainingFilters = query.propertyFilter.keys().toSet() - appliedFilters;
-                //We do a full scan if there were no indexes available to create the initial set.
-                if (appliedFilters.isEmpty()) {
-                    //TODO this should be replaced by an index lookup as well
-                    return fullScan(transaction, bufferType);
-                }
-                return resultSet;
-            };
-            mStorage->loadIncrementalResultSet = [bufferType, this] (qint64 baseRevision, const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters) -> ResultSet
-            {
-                auto revisionCounter = QSharedPointer<qint64>::create(baseRevision);
-                return ResultSet([bufferType, revisionCounter, &transaction, this]() -> QByteArray {
-                    const qint64 topRevision = Akonadi2::Storage::maxRevision(transaction);
-                    //Spit out the revision keys one by one.
-                    while (*revisionCounter <= topRevision) {
-                        const auto uid = Akonadi2::Storage::getUidFromRevision(transaction, *revisionCounter);
-                        const auto type = Akonadi2::Storage::getTypeFromRevision(transaction, *revisionCounter);
-                        Trace() << "Revision" << *revisionCounter << type << uid;
-                        if (type != bufferType) {
-                            //Skip revision
-                            *revisionCounter += 1;
-                            continue;
-                        }
-                        const auto key = Akonadi2::Storage::assembleKey(uid, *revisionCounter);
-                        *revisionCounter += 1;
-                        return key;
-                    }
-                    //We're done
-                    return QByteArray();
-                });
-            };
-        }
-    }
-    ~GenericFacade()
-    {
-    }
-    static QByteArray bufferTypeForDomainType()
-    {
-        //We happen to have a one to one mapping
-        return Akonadi2::ApplicationDomain::getTypeName<DomainType>();
-    }
-    KAsync::Job<void> create(const DomainType &domainObject) Q_DECL_OVERRIDE
-    {
-        if (!mDomainTypeAdaptorFactory) {
-            Warning() << "No domain type adaptor factory available";
-            return KAsync::error<void>();
-        }
-        flatbuffers::FlatBufferBuilder entityFbb;
-        mDomainTypeAdaptorFactory->createBuffer(domainObject, entityFbb);
-        return mResourceAccess->sendCreateCommand(bufferTypeForDomainType(), QByteArray::fromRawData(reinterpret_cast<const char*>(entityFbb.GetBufferPointer()), entityFbb.GetSize()));
-    }
-    KAsync::Job<void> modify(const DomainType &domainObject) Q_DECL_OVERRIDE
-    {
-        if (!mDomainTypeAdaptorFactory) {
-            Warning() << "No domain type adaptor factory available";
-            return KAsync::error<void>();
-        }
-        flatbuffers::FlatBufferBuilder entityFbb;
-        mDomainTypeAdaptorFactory->createBuffer(domainObject, entityFbb);
-        return mResourceAccess->sendModifyCommand(domainObject.identifier(), domainObject.revision(), bufferTypeForDomainType(), QByteArrayList(), QByteArray::fromRawData(reinterpret_cast<const char*>(entityFbb.GetBufferPointer()), entityFbb.GetSize()));
-    }
-    KAsync::Job<void> remove(const DomainType &domainObject) Q_DECL_OVERRIDE
-    {
-        return mResourceAccess->sendDeleteCommand(domainObject.identifier(), domainObject.revision(), bufferTypeForDomainType());
-    }
-    //TODO JOBAPI return job from sync continuation to execute it as subjob?
-    KAsync::Job<void> load(const Akonadi2::Query &query, const QSharedPointer<Akonadi2::ResultProvider<typename DomainType::Ptr> > &resultProvider) Q_DECL_OVERRIDE
-    {
-        auto runner = QSharedPointer<QueryRunner>::create(query);
-        QWeakPointer<Akonadi2::ResultProvider<typename DomainType::Ptr> > weakResultProvider = resultProvider;
-        runner->setQuery([this, weakResultProvider, query] (qint64 oldRevision) -> KAsync::Job<qint64> {
-            return KAsync::start<qint64>([this, weakResultProvider, query, oldRevision](KAsync::Future<qint64> &future) {
-                Trace() << "Executing query " << oldRevision;
-                auto resultProvider = weakResultProvider.toStrongRef();
-                if (!resultProvider) {
-                    Warning() << "Tried executing query after result provider is already gone";
-                    future.setError(0, QString());
-                    future.setFinished();
-                    return;
-                }
-                load(query, resultProvider, oldRevision).template then<void, qint64>([&future, this](qint64 queriedRevision) {
-                    //TODO set revision in result provider?
-                    //TODO update all existing results with new revision
-                    mResourceAccess->sendRevisionReplayedCommand(queriedRevision);
-                    future.setValue(queriedRevision);
-                    future.setFinished();
-                }).exec();
-            });
-        });
-        //In case of a live query we keep the runner for as long alive as the result provider exists
-        if (query.liveQuery) {
-            resultProvider->setQueryRunner(runner);
-            //Ensure the connection is open, if it wasn't already opened
-            //TODO If we are not connected already, we have to check for the latest revision once connected, otherwise we could miss some updates
-            mResourceAccess->open();
-            QObject::connect(mResourceAccess.data(), &Akonadi2::ResourceAccess::revisionChanged, runner.data(), &QueryRunner::revisionChanged);
-        }
-        //We have to capture the runner to keep it alive
-        return synchronizeResource(query).template then<void>([runner](KAsync::Future<void> &future) {
-            runner->run().then<void>([&future]() {
-                future.setFinished();
-            }).exec();
-        },
-        [](int error, const QString &errorString) {
-            Warning() << "Error during sync " << error << errorString;
-        });
-    }
-private:
-    KAsync::Job<void> synchronizeResource(const Akonadi2::Query &query)
-    {
-        //TODO check if a sync is necessary
-        //TODO Only sync what was requested
-        //TODO timeout
-        if (query.syncOnDemand || query.processAll) {
-            return mResourceAccess->synchronizeResource(query.syncOnDemand, query.processAll);
-        }
-        return KAsync::null<void>();
-    }
-    virtual KAsync::Job<qint64> load(const Akonadi2::Query &query, const QSharedPointer<Akonadi2::ResultProvider<typename DomainType::Ptr> > &resultProvider, qint64 oldRevision)
+    static QByteArray bufferTypeForDomainType();
-    {
+    KAsync::Job<void> create(const DomainType &domainObject) Q_DECL_OVERRIDE;
-        return KAsync::start<qint64>([=]() -> qint64 {
+    KAsync::Job<void> modify(const DomainType &domainObject) Q_DECL_OVERRIDE;
-            return mStorage->read(query, oldRevision, resultProvider);
+    KAsync::Job<void> remove(const DomainType &domainObject) Q_DECL_OVERRIDE;
-        });
+    QPair<KAsync::Job<void>, typename ResultEmitter<typename DomainType::Ptr>::Ptr> load(const Akonadi2::Query &query) Q_DECL_OVERRIDE;
-    }
 protected:
    //TODO use one resource access instance per application & per resource
    QSharedPointer<Akonadi2::ResourceAccessInterface> mResourceAccess;
-    QSharedPointer<EntityStorage<DomainType> > mStorage;
    DomainTypeAdaptorFactoryInterface::Ptr mDomainTypeAdaptorFactory;
    QByteArray mResourceInstanceIdentifier;
 };
diff --git a/common/facadeinterface.h b/common/facadeinterface.h
index 3a38db8..318abf3 100644
--- a/common/facadeinterface.h
+++ b/common/facadeinterface.h
@@ -23,6 +23,7 @@
 #include <Async/Async>
 #include <QByteArray>
 #include <QSharedPointer>
+#include <QPair>
 #include "applicationdomaintype.h"
 #include "resultprovider.h"
@@ -42,10 +43,32 @@ class StoreFacade {
 public:
    virtual ~StoreFacade(){};
    QByteArray type() const { return ApplicationDomain::getTypeName<DomainType>(); }
+    /**
+     * Create an entity in the store.
+     *
+     * The job returns succefully once the task has been successfully placed in the queue
+     */
    virtual KAsync::Job<void> create(const DomainType &domainObject) = 0;
+    /**
+     * Modify an entity in the store.
+     *
+     * The job returns succefully once the task has been successfully placed in the queue
+     */
    virtual KAsync::Job<void> modify(const DomainType &domainObject) = 0;
+    /**
+     * Remove an entity from the store.
+     *
+     * The job returns succefully once the task has been successfully placed in the queue
+     */
    virtual KAsync::Job<void> remove(const DomainType &domainObject) = 0;
-    virtual KAsync::Job<void> load(const Query &query, const QSharedPointer<Akonadi2::ResultProvider<typename DomainType::Ptr> > &resultProvider) = 0;
+    /**
+     * Load entities from the store.
+     */
+    virtual QPair<KAsync::Job<void>, typename Akonadi2::ResultEmitter<typename DomainType::Ptr>::Ptr > load(const Query &query) = 0;
 };
 template<class DomainType>
@@ -67,9 +90,9 @@ public:
        return KAsync::error<void>(-1, "Failed to create a facade");
    }
-    KAsync::Job<void> load(const Query &query, const QSharedPointer<Akonadi2::ResultProvider<typename DomainType::Ptr> > &resultProvider)
+    QPair<KAsync::Job<void>, typename Akonadi2::ResultEmitter<typename DomainType::Ptr>::Ptr > load(const Query &query)
    {
-        return KAsync::error<void>(-1, "Failed to create a facade");
+        return qMakePair(KAsync::null<void>(), typename Akonadi2::ResultEmitter<typename DomainType::Ptr>::Ptr());
    }
 };
diff --git a/common/modelresult.cpp b/common/modelresult.cpp
new file mode 100644
index 0000000..c7fcd49
--- /dev/null
+++ b/common/modelresult.cpp
@@ -0,0 +1,251 @@
+/*
+ * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) version 3, or any
+ * later version accepted by the membership of KDE e.V. (or its
+ * successor approved by the membership of KDE e.V.), which shall
+ * act as a proxy defined in Section 6 of version 3 of the license.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "modelresult.h"
+#include <QDebug>
+#include "domain/folder.h"
+#include "log.h"
+template<class T, class Ptr>
+ModelResult<T, Ptr>::ModelResult(const Akonadi2::Query &query, const QList<QByteArray> &propertyColumns)
+    :QAbstractItemModel(),
+    mPropertyColumns(propertyColumns),
+    mQuery(query)
+{
+}
+static qint64 getIdentifier(const QModelIndex &idx)
+{
+    if (!idx.isValid()) {
+        return 0;
+    }
+    return idx.internalId();
+}
+template<class T, class Ptr>
+qint64 ModelResult<T, Ptr>::parentId(const Ptr &value)
+{
+    if (!mQuery.parentProperty.isEmpty()) {
+        const auto property = value->getProperty(mQuery.parentProperty).toByteArray();
+        if (!property.isEmpty()) {
+            return qHash(property);
+        }
+    }
+    return 0;
+}
+template<class T, class Ptr>
+int ModelResult<T, Ptr>::rowCount(const QModelIndex &parent) const
+{
+    return mTree[getIdentifier(parent)].size();
+}
+template<class T, class Ptr>
+int ModelResult<T, Ptr>::columnCount(const QModelIndex &parent) const
+{
+    return mPropertyColumns.size();
+}
+template<class T, class Ptr>
+QVariant ModelResult<T, Ptr>::data(const QModelIndex &index, int role) const
+{
+    if (role == DomainObjectRole) {
+        Q_ASSERT(mEntities.contains(index.internalId()));
+        return QVariant::fromValue(mEntities.value(index.internalId()));
+    }
+    if (role == ChildrenFetchedRole) {
+        return childrenFetched(index);
+    }
+    if (role == Qt::DisplayRole) {
+        if (index.column() < mPropertyColumns.size()) {
+            Q_ASSERT(mEntities.contains(index.internalId()));
+            auto entity = mEntities.value(index.internalId());
+            return entity->getProperty(mPropertyColumns.at(index.column())).toString();
+        } else {
+            return "No data available";
+        }
+    }
+    return QVariant();
+}
+template<class T, class Ptr>
+QModelIndex ModelResult<T, Ptr>::index(int row, int column, const QModelIndex &parent) const
+{
+    const auto id = getIdentifier(parent);
+    const auto childId = mTree.value(id).at(row);
+    return createIndex(row, column, childId);
+}
+template<class T, class Ptr>
+QModelIndex ModelResult<T, Ptr>::createIndexFromId(const qint64 &id) const
+{
+    if (id == 0) {
+        return QModelIndex();
+    }
+    auto grandParentId = mParents.value(id, 0);
+    auto row = mTree.value(grandParentId).indexOf(id);
+    return createIndex(row, 0, id);
+}
+template<class T, class Ptr>
+QModelIndex ModelResult<T, Ptr>::parent(const QModelIndex &index) const
+{
+    auto id = getIdentifier(index);
+    auto parentId = mParents.value(id);
+    return createIndexFromId(parentId);
+}
+template<class T, class Ptr>
+bool ModelResult<T, Ptr>::hasChildren(const QModelIndex &parent) const
+{
+    if (mQuery.parentProperty.isEmpty() && parent.isValid()) {
+        return false;
+    }
+    return QAbstractItemModel::hasChildren(parent);
+}
+template<class T, class Ptr>
+bool ModelResult<T, Ptr>::canFetchMore(const QModelIndex &parent) const
+{
+    return !mEntityChildrenFetched.contains(parent.internalId());
+}
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::fetchMore(const QModelIndex &parent)
+{
+    fetchEntities(parent);
+}
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::add(const Ptr &value)
+{
+    const auto childId = qHash(value->identifier());
+    const auto id = parentId(value);
+    //Ignore updates we get before the initial fetch is done
+    if (!mEntityChildrenFetched.contains(id)) {
+        return;
+    }
+    auto parent = createIndexFromId(id);
+    // qDebug() << "Added entity " << childId << value->identifier() << id;
+    const auto keys = mTree[id];
+    int index = 0;
+    for (; index < keys.size(); index++) {
+        if (childId < keys.at(index)) {
+            break;
+        }
+    }
+    if (mEntities.contains(childId)) {
+        Warning() << "Entity already in model " << value->identifier();
+        return;
+    }
+    // qDebug() << "Inserting rows " << index << parent;
+    beginInsertRows(parent, index, index);
+    mEntities.insert(childId, value);
+    mTree[id].insert(index, childId);
+    mParents.insert(childId, id);
+    endInsertRows();
+    // qDebug() << "Inserted rows " << mTree[id].size();
+}
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::remove(const Ptr &value)
+{
+    auto childId = qHash(value->identifier());
+    auto id = parentId(value);
+    auto parent = createIndexFromId(id);
+    // qDebug() << "Removed entity" << childId;
+    auto index = mTree[id].indexOf(qHash(value->identifier()));
+    beginRemoveRows(parent, index, index);
+    mEntities.remove(childId);
+    mTree[id].removeAll(childId);
+    mParents.remove(childId);
+    //TODO remove children
+    endRemoveRows();
+}
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::fetchEntities(const QModelIndex &parent)
+{
+    const auto id = getIdentifier(parent);
+    mEntityChildrenFetched.insert(id);
+    Trace() << "Loading child entities";
+    loadEntities(parent.data(DomainObjectRole).template value<Ptr>());
+}
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::setFetcher(const std::function<void(const Ptr &parent)> &fetcher)
+{
+    Trace() << "Setting fetcher";
+    loadEntities = fetcher;
+}
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::setEmitter(const typename Akonadi2::ResultEmitter<Ptr>::Ptr &emitter)
+{
+    setFetcher(emitter->mFetcher);
+    emitter->onAdded([this](const Ptr &value) {
+        this->add(value);
+    });
+    emitter->onModified([this](const Ptr &value) {
+        this->modify(value);
+    });
+    emitter->onRemoved([this](const Ptr &value) {
+        this->remove(value);
+    });
+    emitter->onInitialResultSetComplete([this](const Ptr &parent) {
+        const qint64 parentId = parent ? qHash(parent->identifier()) : 0;
+        const auto parentIndex = createIndexFromId(parentId);
+        mEntityChildrenFetchComplete.insert(parentId);
+        emit dataChanged(parentIndex, parentIndex, QVector<int>() << ChildrenFetchedRole);
+    });
+    mEmitter = emitter;
+}
+template<class T, class Ptr>
+bool ModelResult<T, Ptr>::childrenFetched(const QModelIndex &index) const
+{
+    return mEntityChildrenFetchComplete.contains(getIdentifier(index));
+}
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::modify(const Ptr &value)
+{
+    auto childId = qHash(value->identifier());
+    auto id = parentId(value);
+    //Ignore updates we get before the initial fetch is done
+    if (!mEntityChildrenFetched.contains(id)) {
+        return;
+    }
+    auto parent = createIndexFromId(id);
+    // qDebug() << "Modified entity" << childId;
+    auto i = mTree[id].indexOf(childId);
+    mEntities.remove(childId);
+    mEntities.insert(childId, value);
+    //TODO check for change of parents
+    auto idx = index(i, 0, parent);
+    emit dataChanged(idx, idx);
+}
+template class ModelResult<Akonadi2::ApplicationDomain::Folder, Akonadi2::ApplicationDomain::Folder::Ptr>;
+template class ModelResult<Akonadi2::ApplicationDomain::Mail, Akonadi2::ApplicationDomain::Mail::Ptr>;
+template class ModelResult<Akonadi2::ApplicationDomain::Event, Akonadi2::ApplicationDomain::Event::Ptr>;
+template class ModelResult<Akonadi2::ApplicationDomain::AkonadiResource, Akonadi2::ApplicationDomain::AkonadiResource::Ptr>;
diff --git a/common/modelresult.h b/common/modelresult.h
new file mode 100644
index 0000000..700064b
--- /dev/null
+++ b/common/modelresult.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) version 3, or any
+ * later version accepted by the membership of KDE e.V. (or its
+ * successor approved by the membership of KDE e.V.), which shall
+ * act as a proxy defined in Section 6 of version 3 of the license.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <QAbstractItemModel>
+#include <QModelIndex>
+#include <QDebug>
+#include <QSharedPointer>
+#include <functional>
+#include "query.h"
+#include "resultprovider.h"
+template<class T, class Ptr>
+class ModelResult : public QAbstractItemModel
+{
+public:
+    enum Roles {
+        DomainObjectRole = Qt::UserRole + 1,
+        ChildrenFetchedRole
+    };
+    ModelResult(const Akonadi2::Query &query, const QList<QByteArray> &propertyColumns);
+    void setEmitter(const typename Akonadi2::ResultEmitter<Ptr>::Ptr &);
+    int rowCount(const QModelIndex &parent = QModelIndex()) const;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+    QModelIndex index(int row, int column, const QModelIndex & parent = QModelIndex()) const;
+    QModelIndex parent(const QModelIndex &index) const;
+    bool hasChildren(const QModelIndex &parent = QModelIndex()) const;
+    bool canFetchMore(const QModelIndex &parent) const;
+    void fetchMore(const QModelIndex &parent);
+    void add(const Ptr &value);
+    void modify(const Ptr &value);
+    void remove(const Ptr &value);
+    void setFetcher(const std::function<void(const Ptr &parent)> &fetcher);
+    bool childrenFetched(const QModelIndex &) const;
+private:
+    qint64 parentId(const Ptr &value);
+    QModelIndex createIndexFromId(const qint64 &id) const;
+    void fetchEntities(const QModelIndex &parent);
+    //TODO we should be able to directly use T as index, with an appropriate hash function, and thus have a QMap<T, T> and QList<T>
+    QMap<qint64 /* entity id */, Ptr> mEntities;
+    QMap<qint64 /* parent entity id */, QList<qint64> /* child entity id*/> mTree;
+    QMap<qint64 /* child entity id */, qint64 /* parent entity id*/> mParents;
+    QSet<qint64 /* entity id */> mEntityChildrenFetched;
+    QSet<qint64 /* entity id */> mEntityChildrenFetchComplete;
+    QList<QByteArray> mPropertyColumns;
+    Akonadi2::Query mQuery;
+    std::function<void(const Ptr &)> loadEntities;
+    typename Akonadi2::ResultEmitter<Ptr>::Ptr mEmitter;
+};
diff --git a/common/query.h b/common/query.h
index 0cad9fb..5313fa9 100644
--- a/common/query.h
+++ b/common/query.h
@@ -53,6 +53,7 @@ public:
    QHash<QByteArray, QVariant> propertyFilter;
    //Properties to retrieve
    QSet<QByteArray> requestedProperties;
+    QByteArray parentProperty;
    bool syncOnDemand;
    bool processAll;
    //If live query is false, this query will not continuously be updated
diff --git a/common/queryrunner.cpp b/common/queryrunner.cpp
new file mode 100644
index 0000000..e365cfc
--- /dev/null
+++ b/common/queryrunner.cpp
@@ -0,0 +1,312 @@
+/*
+    Copyright (c) 2015 Christian Mollekopf <mollekopf@kolabsys.com>
+    This library is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Library General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+    This library is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
+    License for more details.
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to the
+    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301, USA.
+*/
+#include "queryrunner.h"
+#include <QtConcurrent/QtConcurrentRun>
+#include <QFuture>
+#include <QFutureWatcher>
+#include <QTime>
+#include "commands.h"
+#include "log.h"
+#include "storage.h"
+#include "definitions.h"
+#include "domainadaptor.h"
+using namespace Akonadi2;
+static inline ResultSet fullScan(const Akonadi2::Storage::Transaction &transaction, const QByteArray &bufferType)
+{
+    //TODO use a result set with an iterator, to read values on demand
+    QVector<QByteArray> keys;
+    transaction.openDatabase(bufferType + ".main").scan(QByteArray(), [&](const QByteArray &key, const QByteArray &value) -> bool {
+        //Skip internals
+        if (Akonadi2::Storage::isInternalKey(key)) {
+            return true;
+        }
+        keys << Akonadi2::Storage::uidFromKey(key);
+        return true;
+    },
+    [](const Akonadi2::Storage::Error &error) {
+        qWarning() << "Error during query: " << error.message;
+    });
+    Trace() << "Full scan on " << bufferType << " found " << keys.size() << " results";
+    return ResultSet(keys);
+}
+template<class DomainType>
+QueryRunner<DomainType>::QueryRunner(const Akonadi2::Query &query, const Akonadi2::ResourceAccessInterface::Ptr &resourceAccess, const QByteArray &instanceIdentifier, const DomainTypeAdaptorFactoryInterface::Ptr &factory, const QByteArray &bufferType)
+    : QueryRunnerBase(),
+    mResourceAccess(resourceAccess),
+    mResultProvider(new ResultProvider<typename DomainType::Ptr>),
+    mDomainTypeAdaptorFactory(factory),
+    mQuery(query),
+    mResourceInstanceIdentifier(instanceIdentifier),
+    mBufferType(bufferType)
+{
+    Trace() << "Starting query";
+    //We delegate loading of initial data to the result provider, os it can decide for itself what it needs to load.
+    mResultProvider->setFetcher([this, query](const typename DomainType::Ptr &parent) {
+        Trace() << "Running fetcher";
+        // auto watcher = new QFutureWatcher<qint64>;
+        // QObject::connect(watcher, &QFutureWatcher::finished, [](qint64 newRevision) {
+        //     mResourceAccess->sendRevisionReplayedCommand(newRevision);
+        // });
+        // auto future = QtConcurrent::run([&resultProvider]() -> qint64 {
+        //     const qint64 newRevision = executeInitialQuery(query, parent, resultProvider);
+        //     return newRevision;
+        // });
+        // watcher->setFuture(future);
+        const qint64 newRevision = executeInitialQuery(query, parent, *mResultProvider);
+        mResourceAccess->sendRevisionReplayedCommand(newRevision);
+    });
+    //In case of a live query we keep the runner for as long alive as the result provider exists
+    if (query.liveQuery) {
+        //Incremental updates are always loaded directly, leaving it up to the result to discard the changes if they are not interesting
+        setQuery([this, query] () -> KAsync::Job<void> {
+            return KAsync::start<void>([this, query](KAsync::Future<void> &future) {
+                //TODO execute in thread
+                const qint64 newRevision = executeIncrementalQuery(query, *mResultProvider);
+                mResourceAccess->sendRevisionReplayedCommand(newRevision);
+                future.setFinished();
+            });
+        });
+        //Ensure the connection is open, if it wasn't already opened
+        //TODO If we are not connected already, we have to check for the latest revision once connected, otherwise we could miss some updates
+        mResourceAccess->open();
+        QObject::connect(mResourceAccess.data(), &Akonadi2::ResourceAccess::revisionChanged, this, &QueryRunner::revisionChanged);
+    }
+}
+template<class DomainType>
+QueryRunner<DomainType>::~QueryRunner()
+{
+    Trace() << "Stopped query";
+}
+template<class DomainType>
+typename Akonadi2::ResultEmitter<typename DomainType::Ptr>::Ptr QueryRunner<DomainType>::emitter()
+{
+    return mResultProvider->emitter();
+}
+//TODO move into result provider?
+template<class DomainType>
+void QueryRunner<DomainType>::replaySet(ResultSet &resultSet, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider)
+{
+    // Trace() << "Replay set";
+    int counter = 0;
+    while (resultSet.next([&resultProvider, &counter](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &value, Akonadi2::Operation operation) -> bool {
+        counter++;
+        switch (operation) {
+        case Akonadi2::Operation_Creation:
+            // Trace() << "Got creation";
+            resultProvider.add(Akonadi2::ApplicationDomain::ApplicationDomainType::getInMemoryRepresentation<DomainType>(*value).template staticCast<DomainType>());
+            break;
+        case Akonadi2::Operation_Modification:
+            // Trace() << "Got modification";
+            resultProvider.modify(Akonadi2::ApplicationDomain::ApplicationDomainType::getInMemoryRepresentation<DomainType>(*value).template staticCast<DomainType>());
+            break;
+        case Akonadi2::Operation_Removal:
+            // Trace() << "Got removal";
+            resultProvider.remove(Akonadi2::ApplicationDomain::ApplicationDomainType::getInMemoryRepresentation<DomainType>(*value).template staticCast<DomainType>());
+            break;
+        }
+        return true;
+    })){};
+    Trace() << "Replayed " << counter << " results";
+}
+template<class DomainType>
+void QueryRunner<DomainType>::readEntity(const Akonadi2::Storage::NamedDatabase &db, const QByteArray &key, const std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)> &resultCallback)
+{
+    //This only works for a 1:1 mapping of resource to domain types.
+    //Not i.e. for tags that are stored as flags in each entity of an imap store.
+    //additional properties that don't have a 1:1 mapping (such as separately stored tags),
+    //could be added to the adaptor.
+    db.findLatest(key, [=](const QByteArray &key, const QByteArray &value) -> bool {
+        Akonadi2::EntityBuffer buffer(value.data(), value.size());
+        const Akonadi2::Entity &entity = buffer.entity();
+        const auto metadataBuffer = Akonadi2::EntityBuffer::readBuffer<Akonadi2::Metadata>(entity.metadata());
+        Q_ASSERT(metadataBuffer);
+        const qint64 revision = metadataBuffer ? metadataBuffer->revision() : -1;
+        resultCallback(DomainType::Ptr::create(mResourceInstanceIdentifier, Akonadi2::Storage::uidFromKey(key), revision, mDomainTypeAdaptorFactory->createAdaptor(entity)), metadataBuffer->operation());
+        return false;
+    },
+    [](const Akonadi2::Storage::Error &error) {
+        qWarning() << "Error during query: " << error.message;
+    });
+}
+template<class DomainType>
+ResultSet QueryRunner<DomainType>::loadInitialResultSet(const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters)
+{
+    QSet<QByteArray> appliedFilters;
+    auto resultSet = Akonadi2::ApplicationDomain::TypeImplementation<DomainType>::queryIndexes(query, mResourceInstanceIdentifier, appliedFilters, transaction);
+    remainingFilters = query.propertyFilter.keys().toSet() - appliedFilters;
+    //We do a full scan if there were no indexes available to create the initial set.
+    if (appliedFilters.isEmpty()) {
+        //TODO this should be replaced by an index lookup as well
+        resultSet = fullScan(transaction, mBufferType);
+    }
+    return resultSet;
+}
+template<class DomainType>
+ResultSet QueryRunner<DomainType>::loadIncrementalResultSet(qint64 baseRevision, const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters)
+{
+    const auto bufferType = mBufferType;
+    auto revisionCounter = QSharedPointer<qint64>::create(baseRevision);
+    remainingFilters = query.propertyFilter.keys().toSet();
+    return ResultSet([bufferType, revisionCounter, &transaction]() -> QByteArray {
+        const qint64 topRevision = Akonadi2::Storage::maxRevision(transaction);
+        //Spit out the revision keys one by one.
+        while (*revisionCounter <= topRevision) {
+            const auto uid = Akonadi2::Storage::getUidFromRevision(transaction, *revisionCounter);
+            const auto type = Akonadi2::Storage::getTypeFromRevision(transaction, *revisionCounter);
+            // Trace() << "Revision" << *revisionCounter << type << uid;
+            if (type != bufferType) {
+                //Skip revision
+                *revisionCounter += 1;
+                continue;
+            }
+            const auto key = Akonadi2::Storage::assembleKey(uid, *revisionCounter);
+            *revisionCounter += 1;
+            return key;
+        }
+        Trace() << "Finished reading incremental result set:" << *revisionCounter;
+        //We're done
+        return QByteArray();
+    });
+}
+template<class DomainType>
+ResultSet QueryRunner<DomainType>::filterSet(const ResultSet &resultSet, const std::function<bool(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject)> &filter, const Akonadi2::Storage::NamedDatabase &db, bool initialQuery)
+{
+    auto resultSetPtr = QSharedPointer<ResultSet>::create(resultSet);
+    //Read through the source values and return whatever matches the filter
+    std::function<bool(std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)>)> generator = [this, resultSetPtr, &db, filter, initialQuery](std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)> callback) -> bool {
+        while (resultSetPtr->next()) {
+            //readEntity is only necessary if we actually want to filter or know the operation type (but not a big deal if we do it always I guess)
+            readEntity(db, resultSetPtr->id(), [this, filter, callback, initialQuery](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject, Akonadi2::Operation operation) {
+                //Always remove removals, they probably don't match due to non-available properties
+                if (filter(domainObject) || operation == Akonadi2::Operation_Removal) {
+                    if (initialQuery) {
+                        //We're not interested in removals during the initial query
+                        if (operation != Akonadi2::Operation_Removal) {
+                            callback(domainObject, Akonadi2::Operation_Creation);
+                        }
+                    } else {
+                        callback(domainObject, operation);
+                    }
+                }
+            });
+        }
+        return false;
+    };
+    return ResultSet(generator);
+}
+template<class DomainType>
+std::function<bool(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject)> QueryRunner<DomainType>::getFilter(const QSet<QByteArray> remainingFilters, const Akonadi2::Query &query)
+{
+    return [remainingFilters, query](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject) -> bool {
+        for (const auto &filterProperty : remainingFilters) {
+            const auto property = domainObject->getProperty(filterProperty);
+            if (property.isValid()) {
+                //TODO implement other comparison operators than equality
+                if (property != query.propertyFilter.value(filterProperty)) {
+                    Trace() << "Filtering entity due to property mismatch: " << domainObject->getProperty(filterProperty);
+                    return false;
+                }
+            } else {
+                Warning() << "Ignored property filter because value is invalid: " << filterProperty;
+            }
+        }
+        return true;
+    };
+}
+template<class DomainType>
+qint64 QueryRunner<DomainType>::load(const Akonadi2::Query &query, const std::function<ResultSet(Akonadi2::Storage::Transaction &, QSet<QByteArray> &)> &baseSetRetriever, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider, bool initialQuery)
+{
+    Akonadi2::Storage storage(Akonadi2::storageLocation(), mResourceInstanceIdentifier);
+    storage.setDefaultErrorHandler([](const Akonadi2::Storage::Error &error) {
+        Warning() << "Error during query: " << error.store << error.message;
+    });
+    auto transaction = storage.createTransaction(Akonadi2::Storage::ReadOnly);
+    auto db = transaction.openDatabase(mBufferType + ".main");
+    QSet<QByteArray> remainingFilters;
+    auto resultSet = baseSetRetriever(transaction, remainingFilters);
+    auto filteredSet = filterSet(resultSet, getFilter(remainingFilters, query), db, initialQuery);
+    replaySet(filteredSet, resultProvider);
+    resultProvider.setRevision(Akonadi2::Storage::maxRevision(transaction));
+    return Akonadi2::Storage::maxRevision(transaction);
+}
+template<class DomainType>
+qint64 QueryRunner<DomainType>::executeIncrementalQuery(const Akonadi2::Query &query, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider)
+{
+    QTime time;
+    time.start();
+    const qint64 baseRevision = resultProvider.revision() + 1;
+    Trace() << "Running incremental query " << baseRevision;
+    auto revision = load(query, [&](Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters) -> ResultSet {
+        return loadIncrementalResultSet(baseRevision, query, transaction, remainingFilters);
+    }, resultProvider, false);
+    Trace() << "Incremental query took: " << time.elapsed() << " ms";
+    return revision;
+}
+template<class DomainType>
+qint64 QueryRunner<DomainType>::executeInitialQuery(const Akonadi2::Query &query, const typename DomainType::Ptr &parent, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider)
+{
+    QTime time;
+    time.start();
+    auto modifiedQuery = query;
+    if (!query.parentProperty.isEmpty()) {
+        if (parent) {
+            Trace() << "Running initial query for parent:" << parent->identifier();
+            modifiedQuery.propertyFilter.insert(query.parentProperty, parent->identifier());
+        } else {
+            Trace() << "Running initial query for toplevel";
+            modifiedQuery.propertyFilter.insert(query.parentProperty, QVariant());
+        }
+    }
+    auto revision = load(modifiedQuery, [&](Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters) -> ResultSet {
+        return loadInitialResultSet(modifiedQuery, transaction, remainingFilters);
+    }, resultProvider, true);
+    Trace() << "Initial query took: " << time.elapsed() << " ms";
+    resultProvider.initialResultSetComplete(parent);
+    return revision;
+}
+template class QueryRunner<Akonadi2::ApplicationDomain::Folder>;
+template class QueryRunner<Akonadi2::ApplicationDomain::Mail>;
+template class QueryRunner<Akonadi2::ApplicationDomain::Event>;
diff --git a/common/queryrunner.h b/common/queryrunner.h
new file mode 100644
index 0000000..c918dcb
--- /dev/null
+++ b/common/queryrunner.h
@@ -0,0 +1,108 @@
+/*
+    Copyright (c) 2015 Christian Mollekopf <mollekopf@kolabsys.com>
+    This library is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Library General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+    This library is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
+    License for more details.
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to the
+    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301, USA.
+*/
+#pragma once
+#include <QObject>
+#include "facadeinterface.h"
+#include "resourceaccess.h"
+#include "resultprovider.h"
+#include "domaintypeadaptorfactoryinterface.h"
+#include "storage.h"
+#include "query.h"
+/**
+ * A QueryRunner runs a query and updates the corresponding result set.
+ * 
+ * The lifetime of the QueryRunner is defined by the resut set (otherwise it's doing useless work),
+ * and by how long a result set must be updated. If the query is one off the runner dies after the execution,
+ * otherwise it lives on the react to changes and updates the corresponding result set.
+ * 
+ * QueryRunner has to keep ResourceAccess alive in order to keep getting updates.
+ */
+class QueryRunnerBase : public QObject
+{
+    Q_OBJECT
+protected:
+    typedef std::function<KAsync::Job<void>()> QueryFunction;
+    /**
+     * Set the query to run
+     */
+    void setQuery(const QueryFunction &query)
+    {
+        queryFunction = query;
+    }
+protected slots:
+    /**
+     * Rerun query with new revision
+     */
+    void revisionChanged(qint64 newRevision)
+    {
+        Trace() << "New revision: " << newRevision;
+        run().exec();
+    }
+private:
+    /**
+     * Starts query
+     */
+    KAsync::Job<void> run(qint64 newRevision = 0)
+    {
+        return queryFunction();
+    }
+    QueryFunction queryFunction;
+};
+template<typename DomainType>
+class QueryRunner : public QueryRunnerBase
+{
+public:
+    QueryRunner(const Akonadi2::Query &query, const Akonadi2::ResourceAccessInterface::Ptr &, const QByteArray &instanceIdentifier, const DomainTypeAdaptorFactoryInterface::Ptr &, const QByteArray &bufferType);
+    virtual ~QueryRunner();
+    typename Akonadi2::ResultEmitter<typename DomainType::Ptr>::Ptr emitter();
+private:
+    static void replaySet(ResultSet &resultSet, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider);
+    void readEntity(const Akonadi2::Storage::NamedDatabase &db, const QByteArray &key, const std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)> &resultCallback);
+    ResultSet loadInitialResultSet(const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters);
+    ResultSet loadIncrementalResultSet(qint64 baseRevision, const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, QSet<QByteArray> &remainingFilters);
+    ResultSet filterSet(const ResultSet &resultSet, const std::function<bool(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject)> &filter, const Akonadi2::Storage::NamedDatabase &db, bool initialQuery);
+    std::function<bool(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject)> getFilter(const QSet<QByteArray> remainingFilters, const Akonadi2::Query &query);
+    qint64 load(const Akonadi2::Query &query, const std::function<ResultSet(Akonadi2::Storage::Transaction &, QSet<QByteArray> &)> &baseSetRetriever, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider, bool initialQuery);
+    qint64 executeIncrementalQuery(const Akonadi2::Query &query, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider);
+    qint64 executeInitialQuery(const Akonadi2::Query &query, const typename DomainType::Ptr &parent, Akonadi2::ResultProviderInterface<typename DomainType::Ptr> &resultProvider);
+private:
+    QSharedPointer<Akonadi2::ResultProvider<typename DomainType::Ptr> > mResultProvider;
+    QSharedPointer<Akonadi2::ResourceAccessInterface> mResourceAccess;
+    DomainTypeAdaptorFactoryInterface::Ptr mDomainTypeAdaptorFactory;
+    QByteArray mResourceInstanceIdentifier;
+    QByteArray mBufferType;
+    Akonadi2::Query mQuery;
+};
diff --git a/common/resourceaccess.cpp b/common/resourceaccess.cpp
index bd9e2c9..be25533 100644
--- a/common/resourceaccess.cpp
+++ b/common/resourceaccess.cpp
@@ -282,6 +282,7 @@ KAsync::Job<void>  ResourceAccess::sendCommand(int commandId, flatbuffers::FlatB
 KAsync::Job<void> ResourceAccess::synchronizeResource(bool sourceSync, bool localSync)
 {
+    Trace() << "Sending synchronize command: " << sourceSync << localSync;
    flatbuffers::FlatBufferBuilder fbb;
    auto command = Akonadi2::CreateSynchronize(fbb, sourceSync, localSync);
    Akonadi2::FinishSynchronizeBuffer(fbb, command);
@@ -340,7 +341,7 @@ KAsync::Job<void> ResourceAccess::sendRevisionReplayedCommand(qint64 revision)
 void ResourceAccess::open()
 {
    if (d->socket && d->socket->isValid()) {
-        log("Socket valid, so not opening again");
+        // Trace() << "Socket valid, so not opening again";
        return;
    }
    if (d->openingSocket) {
diff --git a/common/resourceaccess.h b/common/resourceaccess.h
index 8e27054..e87a1f7 100644
--- a/common/resourceaccess.h
+++ b/common/resourceaccess.h
@@ -37,6 +37,8 @@ class ResourceAccessInterface : public QObject
 {
    Q_OBJECT
 public:
+    typedef QSharedPointer<ResourceAccessInterface> Ptr;
    ResourceAccessInterface() {}
    virtual ~ResourceAccessInterface() {}
    virtual KAsync::Job<void> sendCommand(int commandId) = 0;
diff --git a/common/resourcefacade.cpp b/common/resourcefacade.cpp
index 54185f8..6510c90 100644
--- a/common/resourcefacade.cpp
+++ b/common/resourcefacade.cpp
@@ -54,9 +54,15 @@ KAsync::Job<void> ResourceFacade::remove(const Akonadi2::ApplicationDomain::Akon
    });
 }
-KAsync::Job<void> ResourceFacade::load(const Akonadi2::Query &query, const QSharedPointer<Akonadi2::ResultProvider<typename Akonadi2::ApplicationDomain::AkonadiResource::Ptr> > &resultProvider)
+QPair<KAsync::Job<void>, typename Akonadi2::ResultEmitter<Akonadi2::ApplicationDomain::AkonadiResource::Ptr>::Ptr > ResourceFacade::load(const Akonadi2::Query &query)
 {
-    return KAsync::start<void>([query, resultProvider]() {
+    auto resultProvider = new Akonadi2::ResultProvider<typename Akonadi2::ApplicationDomain::AkonadiResource::Ptr>();
+    auto emitter = resultProvider->emitter();
+    resultProvider->setFetcher([](const QSharedPointer<Akonadi2::ApplicationDomain::AkonadiResource> &) {});
+    resultProvider->onDone([resultProvider]() {
+        delete resultProvider;
+    });
+    auto job = KAsync::start<void>([query, resultProvider]() {
        const auto configuredResources = ResourceConfig::getResources();
        for (const auto &res : configuredResources.keys()) {
            const auto type = configuredResources.value(res);
@@ -68,8 +74,9 @@ KAsync::Job<void> ResourceFacade::load(const Akonadi2::Query &query, const QShar
            }
        }
        //TODO initialResultSetComplete should be implicit
-        resultProvider->initialResultSetComplete();
+        resultProvider->initialResultSetComplete(Akonadi2::ApplicationDomain::AkonadiResource::Ptr());
        resultProvider->complete();
    });
+    return qMakePair(job, emitter);
 }
diff --git a/common/resourcefacade.h b/common/resourcefacade.h
index 437ff75..38e0c0e 100644
--- a/common/resourcefacade.h
+++ b/common/resourcefacade.h
@@ -37,5 +37,6 @@ public:
    KAsync::Job<void> create(const Akonadi2::ApplicationDomain::AkonadiResource &resource) Q_DECL_OVERRIDE;
    KAsync::Job<void> modify(const Akonadi2::ApplicationDomain::AkonadiResource &resource) Q_DECL_OVERRIDE;
    KAsync::Job<void> remove(const Akonadi2::ApplicationDomain::AkonadiResource &resource) Q_DECL_OVERRIDE;
-    KAsync::Job<void> load(const Akonadi2::Query &query, const QSharedPointer<Akonadi2::ResultProvider<typename Akonadi2::ApplicationDomain::AkonadiResource::Ptr> > &resultProvider) Q_DECL_OVERRIDE;
+    QPair<KAsync::Job<void>, typename Akonadi2::ResultEmitter<Akonadi2::ApplicationDomain::AkonadiResource::Ptr>::Ptr > load(const Akonadi2::Query &query) Q_DECL_OVERRIDE;
 };
diff --git a/common/resultprovider.h b/common/resultprovider.h
index bc03152..d50f3f6 100644
--- a/common/resultprovider.h
+++ b/common/resultprovider.h
@@ -20,9 +20,12 @@
 #pragma once
+#include <QThread>
 #include <functional>
 #include <memory>
 #include "threadboundary.h"
+#include "resultset.h"
+#include "log.h"
 using namespace async;
@@ -34,11 +37,43 @@ namespace Akonadi2 {
 template<class T>
 class ResultEmitter;
+template<class T>
+class ResultProviderInterface
+{
+public:
+    ResultProviderInterface()
+        : mRevision(0)
+    {
+    }
+    virtual void add(const T &value) = 0;
+    virtual void modify(const T &value) = 0;
+    virtual void remove(const T &value) = 0;
+    virtual void initialResultSetComplete(const T &parent) = 0;
+    virtual void complete() = 0;
+    virtual void clear() = 0;
+    virtual void setFetcher(const std::function<void(const T &parent)> &fetcher) = 0;
+    void setRevision(qint64 revision)
+    {
+        mRevision = revision;
+    }
+    qint64 revision() const
+    {
+        return mRevision;
+    }
+private:
+    qint64 mRevision;
+};
 /*
 * The promise side for the result emitter
 */
 template<class T>
-class ResultProvider {
+class ResultProvider : public ResultProviderInterface<T> {
 private:
    void callInMainThreadOnEmitter(void (ResultEmitter<T>::*f)())
    {
@@ -69,6 +104,12 @@ private:
    }
 public:
+    typedef QSharedPointer<ResultProvider<T> > Ptr;
+    virtual ~ResultProvider()
+    {
+    }
    //Called from worker thread
    void add(const T &value)
    {
@@ -103,9 +144,15 @@ public:
        });
    }
-    void initialResultSetComplete()
+    void initialResultSetComplete(const T &parent)
    {
-        callInMainThreadOnEmitter(&ResultEmitter<T>::initialResultSetComplete);
+        //Because I don't know how to use bind
+        auto weakEmitter = mResultEmitter;
+        callInMainThreadOnEmitter([weakEmitter, parent](){
+            if (auto strongRef = weakEmitter.toStrongRef()) {
+                strongRef->initialResultSetComplete(parent);
+            }
+        });
    }
    //Called from worker thread
@@ -126,30 +173,16 @@ public:
            //We have to go over a separate var and return that, otherwise we'd delete the emitter immediately again
            auto sharedPtr = QSharedPointer<ResultEmitter<T> >(new ResultEmitter<T>, [this](ResultEmitter<T> *emitter){ mThreadBoundary->callInMainThread([this]() {done();}); delete emitter; });
            mResultEmitter = sharedPtr;
+            sharedPtr->setFetcher([this](const T &parent) {
+                Q_ASSERT(mFetcher);
+                mFetcher(parent);
+            });
            return sharedPtr;
        }
        return mResultEmitter.toStrongRef();
    }
-    /**
-        * For lifetimemanagement only.
-        * We keep the runner alive as long as the result provider exists.
-        */
-    void setQueryRunner(const QSharedPointer<QObject> &runner)
-    {
-        mQueryRunner = runner;
-    }
-    /**
-        * For lifetimemanagement only.
-        * We keep the runner alive as long as the result provider exists.
-        */
-    void setFacade(const std::shared_ptr<void> &facade)
-    {
-        mFacade = facade;
-    }
    void onDone(const std::function<void()> &callback)
    {
        mThreadBoundary = QSharedPointer<ThreadBoundary>::create();
@@ -162,21 +195,27 @@ public:
        return mResultEmitter.toStrongRef().isNull();
    }
+    void setFetcher(const std::function<void(const T &parent)> &fetcher)
+    {
+        mFetcher = fetcher;
+    }
 private:
    void done()
    {
        qWarning() << "done";
        if (mOnDoneCallback) {
-            mOnDoneCallback();
+            auto callback = mOnDoneCallback;
            mOnDoneCallback = std::function<void()>();
+            //This may delete this object
+            callback();
        }
    }
    QWeakPointer<ResultEmitter<T> > mResultEmitter;
-    QSharedPointer<QObject> mQueryRunner;
-    std::shared_ptr<void> mFacade;
    std::function<void()> mOnDoneCallback;
    QSharedPointer<ThreadBoundary> mThreadBoundary;
+    std::function<void(const T &parent)> mFetcher;
 };
 /*
@@ -194,6 +233,8 @@ private:
 template<class DomainType>
 class ResultEmitter {
 public:
+    typedef QSharedPointer<ResultEmitter<DomainType> > Ptr;
    void onAdded(const std::function<void(const DomainType&)> &handler)
    {
        addHandler = handler;
@@ -209,7 +250,7 @@ public:
        removeHandler = handler;
    }
-    void onInitialResultSetComplete(const std::function<void(void)> &handler)
+    void onInitialResultSetComplete(const std::function<void(const DomainType&)> &handler)
    {
        initialResultSetCompleteHandler = handler;
    }
@@ -239,28 +280,41 @@ public:
        removeHandler(value);
    }
-    void initialResultSetComplete()
+    void initialResultSetComplete(const DomainType &parent)
    {
-        initialResultSetCompleteHandler();
+        if (initialResultSetCompleteHandler) {
+            initialResultSetCompleteHandler(parent);
+        }
    }
    void complete()
    {
-        completeHandler();
+        if (completeHandler) {
+            completeHandler();
+        }
    }
    void clear()
    {
-        clearHandler();
+        if (clearHandler) {
+            clearHandler();
+        }
    }
+    void setFetcher(const std::function<void(const DomainType &parent)> &fetcher)
+    {
+        mFetcher = fetcher;
+    }
+    std::function<void(const DomainType &parent)> mFetcher;
 private:
    friend class ResultProvider<DomainType>;
    std::function<void(const DomainType&)> addHandler;
    std::function<void(const DomainType&)> modifyHandler;
    std::function<void(const DomainType&)> removeHandler;
-    std::function<void(void)> initialResultSetCompleteHandler;
+    std::function<void(const DomainType&)> initialResultSetCompleteHandler;
    std::function<void(void)> completeHandler;
    std::function<void(void)> clearHandler;
    ThreadBoundary mThreadBoundary;
diff --git a/common/storage_lmdb.cpp b/common/storage_lmdb.cpp
index 1516e69..a247e38 100644
--- a/common/storage_lmdb.cpp
+++ b/common/storage_lmdb.cpp
@@ -253,22 +253,69 @@ int Storage::NamedDatabase::scan(const QByteArray &k,
    return numberOfRetrievedValues;
 }
-void Storage::NamedDatabase::findLatest(const QByteArray &uid,
+void Storage::NamedDatabase::findLatest(const QByteArray &k,
            const std::function<void(const QByteArray &key, const QByteArray &value)> &resultHandler,
            const std::function<void(const Storage::Error &error)> &errorHandler) const
 {
-    QByteArray latestKey;
+    if (!d || !d->transaction) {
-    scan(uid, [&](const QByteArray &key, const QByteArray &value) -> bool {
+        //Not an error. We rely on this to read nothing from non-existing databases.
-        latestKey = key;
+        return;
-        return true;
+    }
-    },
-    errorHandler, true);
-    scan(latestKey, [=](const QByteArray &key, const QByteArray &value) -> bool {
+    int rc;
-        resultHandler(key, value);
+    MDB_val key;
-        return false;
+    MDB_val data;
-    },
+    MDB_cursor *cursor;
-    errorHandler);
+    key.mv_data = (void*)k.constData();
+    key.mv_size = k.size();
+    rc = mdb_cursor_open(d->transaction, d->dbi, &cursor);
+    if (rc) {
+        Error error(d->name.toLatin1(), getErrorCode(rc), QByteArray("Error during mdb_cursor open: ") + QByteArray(mdb_strerror(rc)));
+        errorHandler ? errorHandler(error) : d->defaultErrorHandler(error);
+        return;
+    }
+    MDB_cursor_op op = MDB_SET_RANGE;
+    if ((rc = mdb_cursor_get(cursor, &key, &data, op)) == 0) {
+        //The first lookup will find a key that is equal or greather than our key
+        if (QByteArray::fromRawData((char*)key.mv_data, key.mv_size).startsWith(k)) {
+            bool advanced = false;
+            while (QByteArray::fromRawData((char*)key.mv_data, key.mv_size).startsWith(k)) {
+                advanced = true;
+                MDB_cursor_op nextOp = MDB_NEXT;
+                rc = mdb_cursor_get(cursor, &key, &data, nextOp);
+                if (rc) {
+                    break;
+                }
+            }
+            if (advanced) {
+                MDB_cursor_op prefOp = MDB_PREV;
+                //We read past the end above, just take the last value
+                if (rc == MDB_NOTFOUND) {
+                    prefOp = MDB_LAST;
+                }
+                rc = mdb_cursor_get(cursor, &key, &data, prefOp);
+                resultHandler(QByteArray::fromRawData((char*)key.mv_data, key.mv_size), QByteArray::fromRawData((char*)data.mv_data, data.mv_size));
+            }
+        }
+    }
+    //We never find the last value
+    if (rc == MDB_NOTFOUND) {
+        rc = 0;
+    }
+    mdb_cursor_close(cursor);
+    if (rc) {
+        Error error(d->name.toLatin1(), getErrorCode(rc), QByteArray("Key: ") + k + " : " + QByteArray(mdb_strerror(rc)));
+        errorHandler ? errorHandler(error) : d->defaultErrorHandler(error);
+    }
+    return;
 }
diff --git a/common/threadboundary.cpp b/common/threadboundary.cpp
index 47ec508..48fd11a 100644
--- a/common/threadboundary.cpp
+++ b/common/threadboundary.cpp
@@ -24,6 +24,9 @@ Q_DECLARE_METATYPE(std::function<void()>);
 namespace async {
 ThreadBoundary::ThreadBoundary(): QObject() { qRegisterMetaType<std::function<void()> >("std::function<void()>"); }
-ThreadBoundary:: ~ThreadBoundary() {}
+ThreadBoundary:: ~ThreadBoundary()
+{
+}
 }