From 6b12a5df6289921a55f26665cf83bf290154f8b9 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Thu, 30 Apr 2015 15:34:15 +0200
Subject: Moved resultprovider to separate file.

---
 common/clientapi.cpp    |   1 +
 common/clientapi.h      | 196 +-----------------------------------------
 common/resultprovider.h | 221 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 223 insertions(+), 195 deletions(-)
 create mode 100644 common/resultprovider.h

(limited to 'common')

diff --git a/common/clientapi.cpp b/common/clientapi.cpp
index 5cb3b69..3350927 100644
--- a/common/clientapi.cpp
+++ b/common/clientapi.cpp
@@ -3,6 +3,7 @@
 #include "resourceaccess.h"
 #include "commands.h"
 #include "log.h"
+#include <QtConcurrent/QtConcurrentRun>
 
 namespace async
 {
diff --git a/common/clientapi.h b/common/clientapi.h
index 48177df..56247a7 100644
--- a/common/clientapi.h
+++ b/common/clientapi.h
@@ -24,212 +24,18 @@
 #include <QSet>
 #include <QSharedPointer>
 #include <QStandardPaths>
-#include <QTimer>
 #include <QDebug>
 #include <QEventLoop>
-#include <QtConcurrent/QtConcurrentRun>
 #include <functional>
 #include <memory>
 #include "threadboundary.h"
 #include "async/src/async.h"
+#include "resultprovider.h"
 
 namespace async {
     //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);
-
-    /**
-    * Query result set
-    */
-
-    template<class T>
-    class ResultEmitter;
-
-    /*
-    * The promise side for the result emitter
-    */
-    template<class T>
-    class ResultProvider {
-    private:
-        void callInMainThreadOnEmitter(void (ResultEmitter<T>::*f)())
-        {
-            //We use the eventloop to call the addHandler directly from the main eventloop.
-            //That way the result emitter implementation doesn't have to care about threadsafety at all.
-            //The alternative would be to make all handlers of the emitter threadsafe.
-            if (auto emitter = mResultEmitter.toStrongRef()) {
-                auto weakEmitter = mResultEmitter;
-                //We don't want to keep the emitter alive here, so we only capture a weak reference
-                emitter->mThreadBoundary.callInMainThread([weakEmitter, f]() {
-                    if (auto strongRef = weakEmitter.toStrongRef()) {
-                        (strongRef.data()->*f)();
-                    }
-                });
-            }
-        }
-
-        void callInMainThreadOnEmitter(const std::function<void()> &f)
-        {
-            //We use the eventloop to call the addHandler directly from the main eventloop.
-            //That way the result emitter implementation doesn't have to care about threadsafety at all.
-            //The alternative would be to make all handlers of the emitter threadsafe.
-            if (auto emitter = mResultEmitter.toStrongRef()) {
-                emitter->mThreadBoundary.callInMainThread([f]() {
-                    f();
-                });
-            }
-        }
-
-    public:
-        //Called from worker thread
-        void add(const T &value)
-        {
-            //Because I don't know how to use bind
-            auto weakEmitter = mResultEmitter;
-            callInMainThreadOnEmitter([weakEmitter, value](){
-                if (auto strongRef = weakEmitter.toStrongRef()) {
-                    strongRef->addHandler(value);
-                }
-            });
-        }
-
-        void initialResultSetComplete()
-        {
-            callInMainThreadOnEmitter(&ResultEmitter<T>::initialResultSetComplete);
-        }
-
-        //Called from worker thread
-        void complete()
-        {
-            callInMainThreadOnEmitter(&ResultEmitter<T>::complete);
-        }
-
-        void clear()
-        {
-            callInMainThreadOnEmitter(&ResultEmitter<T>::clear);
-        }
-
-
-        QSharedPointer<ResultEmitter<T> > emitter()
-        {
-            if (!mResultEmitter) {
-                //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){ done(); delete emitter; });
-                mResultEmitter = sharedPtr;
-                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)
-        {
-            mOnDoneCallback = callback;
-        }
-
-        bool isDone() const
-        {
-            //The existance of the emitter currently defines wether we're done or not.
-            return mResultEmitter.toStrongRef().isNull();
-        }
-
-    private:
-        void done()
-        {
-            qWarning() << "done";
-            if (mOnDoneCallback) {
-                mOnDoneCallback();
-                mOnDoneCallback = std::function<void()>();
-            }
-        }
-
-        QWeakPointer<ResultEmitter<T> > mResultEmitter;
-        QSharedPointer<QObject> mQueryRunner;
-        std::shared_ptr<void> mFacade;
-        std::function<void()> mOnDoneCallback;
-    };
-
-    /*
-    * The future side for the client.
-    *
-    * It does not directly hold the state.
-    *
-    * The advantage of this is that we can specialize it to:
-    * * do inline transformations to the data
-    * * directly store the state in a suitable datastructure: QList, QSet, std::list, QVector, ...
-    * * build async interfaces with signals
-    * * build sync interfaces that block when accessing the value
-    *
-    */
-    template<class DomainType>
-    class ResultEmitter {
-    public:
-        void onAdded(const std::function<void(const DomainType&)> &handler)
-        {
-            addHandler = handler;
-        }
-        // void onRemoved(const std::function<void(const T&)> &handler);
-        void onInitialResultSetComplete(const std::function<void(void)> &handler)
-        {
-            initialResultSetCompleteHandler = handler;
-        }
-        void onComplete(const std::function<void(void)> &handler)
-        {
-            completeHandler = handler;
-        }
-        void onClear(const std::function<void(void)> &handler)
-        {
-            clearHandler = handler;
-        }
-
-        void add(const DomainType &value)
-        {
-            addHandler(value);
-        }
-
-        void initialResultSetComplete()
-        {
-            initialResultSetCompleteHandler();
-        }
-
-        void complete()
-        {
-            completeHandler();
-        }
-
-        void clear()
-        {
-            clearHandler();
-        }
-
-    private:
-        friend class ResultProvider<DomainType>;
-
-        std::function<void(const DomainType&)> addHandler;
-        // std::function<void(const T&)> removeHandler;
-        std::function<void(void)> initialResultSetCompleteHandler;
-        std::function<void(void)> completeHandler;
-        std::function<void(void)> clearHandler;
-        ThreadBoundary mThreadBoundary;
-    };
-
 }
 
 namespace Akonadi2 {
diff --git a/common/resultprovider.h b/common/resultprovider.h
new file mode 100644
index 0000000..4d985d9
--- /dev/null
+++ b/common/resultprovider.h
@@ -0,0 +1,221 @@
+/*
+ * 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 <functional>
+#include <memory>
+#include "threadboundary.h"
+
+namespace async {
+
+/**
+* Query result set
+*/
+template<class T>
+class ResultEmitter;
+
+/*
+* The promise side for the result emitter
+*/
+template<class T>
+class ResultProvider {
+private:
+    void callInMainThreadOnEmitter(void (ResultEmitter<T>::*f)())
+    {
+        //We use the eventloop to call the addHandler directly from the main eventloop.
+        //That way the result emitter implementation doesn't have to care about threadsafety at all.
+        //The alternative would be to make all handlers of the emitter threadsafe.
+        if (auto emitter = mResultEmitter.toStrongRef()) {
+            auto weakEmitter = mResultEmitter;
+            //We don't want to keep the emitter alive here, so we only capture a weak reference
+            emitter->mThreadBoundary.callInMainThread([weakEmitter, f]() {
+                if (auto strongRef = weakEmitter.toStrongRef()) {
+                    (strongRef.data()->*f)();
+                }
+            });
+        }
+    }
+
+    void callInMainThreadOnEmitter(const std::function<void()> &f)
+    {
+        //We use the eventloop to call the addHandler directly from the main eventloop.
+        //That way the result emitter implementation doesn't have to care about threadsafety at all.
+        //The alternative would be to make all handlers of the emitter threadsafe.
+        if (auto emitter = mResultEmitter.toStrongRef()) {
+            emitter->mThreadBoundary.callInMainThread([f]() {
+                f();
+            });
+        }
+    }
+
+public:
+    //Called from worker thread
+    void add(const T &value)
+    {
+        //Because I don't know how to use bind
+        auto weakEmitter = mResultEmitter;
+        callInMainThreadOnEmitter([weakEmitter, value](){
+            if (auto strongRef = weakEmitter.toStrongRef()) {
+                strongRef->addHandler(value);
+            }
+        });
+    }
+
+    void initialResultSetComplete()
+    {
+        callInMainThreadOnEmitter(&ResultEmitter<T>::initialResultSetComplete);
+    }
+
+    //Called from worker thread
+    void complete()
+    {
+        callInMainThreadOnEmitter(&ResultEmitter<T>::complete);
+    }
+
+    void clear()
+    {
+        callInMainThreadOnEmitter(&ResultEmitter<T>::clear);
+    }
+
+
+    QSharedPointer<ResultEmitter<T> > emitter()
+    {
+        if (!mResultEmitter) {
+            //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){ done(); delete emitter; });
+            mResultEmitter = sharedPtr;
+            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)
+    {
+        mOnDoneCallback = callback;
+    }
+
+    bool isDone() const
+    {
+        //The existance of the emitter currently defines wether we're done or not.
+        return mResultEmitter.toStrongRef().isNull();
+    }
+
+private:
+    void done()
+    {
+        qWarning() << "done";
+        if (mOnDoneCallback) {
+            mOnDoneCallback();
+            mOnDoneCallback = std::function<void()>();
+        }
+    }
+
+    QWeakPointer<ResultEmitter<T> > mResultEmitter;
+    QSharedPointer<QObject> mQueryRunner;
+    std::shared_ptr<void> mFacade;
+    std::function<void()> mOnDoneCallback;
+};
+
+/*
+* The future side for the client.
+*
+* It does not directly hold the state.
+*
+* The advantage of this is that we can specialize it to:
+* * do inline transformations to the data
+* * directly store the state in a suitable datastructure: QList, QSet, std::list, QVector, ...
+* * build async interfaces with signals
+* * build sync interfaces that block when accessing the value
+*
+*/
+template<class DomainType>
+class ResultEmitter {
+public:
+    void onAdded(const std::function<void(const DomainType&)> &handler)
+    {
+        addHandler = handler;
+    }
+    // void onRemoved(const std::function<void(const T&)> &handler);
+    void onInitialResultSetComplete(const std::function<void(void)> &handler)
+    {
+        initialResultSetCompleteHandler = handler;
+    }
+    void onComplete(const std::function<void(void)> &handler)
+    {
+        completeHandler = handler;
+    }
+    void onClear(const std::function<void(void)> &handler)
+    {
+        clearHandler = handler;
+    }
+
+    void add(const DomainType &value)
+    {
+        addHandler(value);
+    }
+
+    void initialResultSetComplete()
+    {
+        initialResultSetCompleteHandler();
+    }
+
+    void complete()
+    {
+        completeHandler();
+    }
+
+    void clear()
+    {
+        clearHandler();
+    }
+
+private:
+    friend class ResultProvider<DomainType>;
+
+    std::function<void(const DomainType&)> addHandler;
+    // std::function<void(const T&)> removeHandler;
+    std::function<void(void)> initialResultSetCompleteHandler;
+    std::function<void(void)> completeHandler;
+    std::function<void(void)> clearHandler;
+    ThreadBoundary mThreadBoundary;
+};
+
+}
+
-- 
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