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/*
* Copyright (C) 2014 Aaron Seigo <aseigo@kde.org>
*
* 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 <flatbuffers/flatbuffers.h>
#include <QSharedDataPointer>
#include <QObject>
#include <akonadi2common_export.h>
#include <storage.h>
#include <Async/Async>
#include "domainadaptor.h"
namespace Akonadi2
{
class PipelineState;
class Preprocessor;
class AKONADI2COMMON_EXPORT Pipeline : public QObject
{
Q_OBJECT
public:
enum Type { NullPipeline, NewPipeline, ModifiedPipeline, DeletedPipeline };
Pipeline(const QString &storagePath, QObject *parent = 0);
~Pipeline();
Storage &storage() const;
void setPreprocessors(const QString &entityType, Type pipelineType, const QVector<Preprocessor *> &preprocessors);
void startTransaction();
void commit();
Storage::Transaction &transaction();
void null();
void setAdaptorFactory(const QString &entityType, DomainTypeAdaptorFactoryInterface::Ptr factory);
KAsync::Job<void> newEntity(void const *command, size_t size);
KAsync::Job<void> modifiedEntity(void const *command, size_t size);
KAsync::Job<void> deletedEntity(void const *command, size_t size);
Q_SIGNALS:
void revisionUpdated(qint64);
void pipelinesDrained();
private Q_SLOTS:
void stepPipelines();
private:
void pipelineStepped(const PipelineState &state);
//Don't use a reference here (it would invalidate itself)
void pipelineCompleted(PipelineState state);
void scheduleStep();
friend class PipelineState;
class Private;
Private * const d;
};
class AKONADI2COMMON_EXPORT PipelineState
{
public:
PipelineState();
PipelineState(Pipeline *pipeline, Pipeline::Type type, const QByteArray &key, const QVector<Preprocessor *> &filters, qint64 revision, const std::function<void()> &callback);
PipelineState(const PipelineState &other);
~PipelineState();
PipelineState &operator=(const PipelineState &rhs);
bool operator==(const PipelineState &rhs);
bool isIdle() const;
QByteArray key() const;
Pipeline::Type type() const;
qint64 revision() const;
//TODO expose command
void step();
void processingCompleted(Preprocessor *filter);
void callback();
private:
class Private;
QExplicitlySharedDataPointer<Private> d;
};
class AKONADI2COMMON_EXPORT Preprocessor
{
public:
Preprocessor();
virtual ~Preprocessor();
//TODO pass actual command as well, for changerecording
virtual void process(const PipelineState &state, Akonadi2::Storage::Transaction &transaction);
//TODO to record progress
virtual QString id() const;
protected:
void processingCompleted(PipelineState state);
private:
class Private;
Private * const d;
};
/**
* A simple processor that takes a single function
*/
class AKONADI2COMMON_EXPORT SimpleProcessor : public Akonadi2::Preprocessor
{
public:
SimpleProcessor(const QString &id, const std::function<void(const Akonadi2::PipelineState &state, const Akonadi2::Entity &e, Akonadi2::Storage::Transaction &transaction)> &f)
: Akonadi2::Preprocessor(),
mFunction(f),
mId(id)
{
}
void process(const PipelineState &state, Akonadi2::Storage::Transaction &transaction) Q_DECL_OVERRIDE
{
transaction.openDatabase().scan(state.key(), [this, &state, &transaction](const QByteArray &key, const QByteArray &value) -> bool {
auto entity = Akonadi2::GetEntity(value);
mFunction(state, *entity, transaction);
processingCompleted(state);
return false;
}, [this, state](const Akonadi2::Storage::Error &error) {
ErrorMsg() << "Failed to find value in pipeline: " << error.message;
processingCompleted(state);
});
}
QString id() const
{
return mId;
}
protected:
std::function<void(const Akonadi2::PipelineState &state, const Akonadi2::Entity &e, Akonadi2::Storage::Transaction &transaction)> mFunction;
QString mId;
};
} // namespace Akonadi2
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