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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/>.
*/
#include "pipeline.h"
#include <QByteArray>
#include <QStandardPaths>
#include <QVector>
namespace Akonadi2
{
class Pipeline::Private
{
public:
Private(const QString &resourceName)
: storage(QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + "/akonadi2/storage", resourceName),
stepScheduled(false)
{
}
Storage storage;
QVector<Preprocessor *> nullPipeline;
QVector<Preprocessor *> newPipeline;
QVector<Preprocessor *> modifiedPipeline;
QVector<Preprocessor *> deletedPipeline;
QVector<PipelineState> activePipelines;
bool stepScheduled;
};
Pipeline::Pipeline(const QString &resourceName, QObject *parent)
: QObject(parent),
d(new Private(resourceName))
{
}
Pipeline::~Pipeline()
{
delete d;
}
Storage &Pipeline::storage() const
{
return d->storage;
}
void Pipeline::null()
{
//TODO: is there really any need for the null pipeline? if so, it should be doing something ;)
PipelineState state(this, NullPipeline, QByteArray(), d->nullPipeline);
d->activePipelines << state;
state.step();
}
void Pipeline::newEntity(const QByteArray &key, flatbuffers::FlatBufferBuilder &entity)
{
PipelineState state(this, NewPipeline, key, d->newPipeline);
d->activePipelines << state;
state.step();
}
void Pipeline::modifiedEntity(const QByteArray &key, flatbuffers::FlatBufferBuilder &entityDelta)
{
PipelineState state(this, ModifiedPipeline, key, d->modifiedPipeline);
d->activePipelines << state;
state.step();
}
void Pipeline::deletedEntity(const QByteArray &key)
{
PipelineState state(this, DeletedPipeline, key, d->deletedPipeline);
d->activePipelines << state;
state.step();
}
void Pipeline::pipelineStepped(const PipelineState &state)
{
scheduleStep();
}
void Pipeline::scheduleStep()
{
if (!d->stepScheduled) {
d->stepScheduled = true;
QMetaObject::invokeMethod(this, "stepPipelines", Qt::QueuedConnection);
}
}
void Pipeline::stepPipelines()
{
for (PipelineState &state: d->activePipelines) {
if (state.isIdle()) {
state.step();
}
}
d->stepScheduled = false;
}
void Pipeline::pipelineCompleted(const PipelineState &state)
{
//TODO finalize the datastore, inform clients of the new rev
const int index = d->activePipelines.indexOf(state);
if (index > -1) {
d->activePipelines.remove(index);
}
if (state.type() != NullPipeline) {
emit revisionUpdated();
}
scheduleStep();
}
class PipelineState::Private : public QSharedData
{
public:
Private(Pipeline *p, Pipeline::Type t, const QByteArray &k, QVector<Preprocessor *> filters)
: pipeline(p),
type(t),
key(k),
filterIt(filters),
idle(true)
{}
Private()
: pipeline(0),
filterIt(QVector<Preprocessor *>()),
idle(true)
{}
Pipeline *pipeline;
Pipeline::Type type;
QByteArray key;
QVectorIterator<Preprocessor *> filterIt;
bool idle;
};
PipelineState::PipelineState()
: d(new Private())
{
}
PipelineState::PipelineState(Pipeline *pipeline, Pipeline::Type type, const QByteArray &key, const QVector<Preprocessor *> &filters)
: d(new Private(pipeline, type, key, filters))
{
}
PipelineState::PipelineState(const PipelineState &other)
: d(other.d)
{
}
PipelineState::~PipelineState()
{
}
PipelineState &PipelineState::operator=(const PipelineState &rhs)
{
d = rhs.d;
return *this;
}
bool PipelineState::operator==(const PipelineState &rhs)
{
return d == rhs.d;
}
bool PipelineState::isIdle() const
{
return d->idle;
}
QByteArray PipelineState::key() const
{
return d->key;
}
Pipeline::Type PipelineState::type() const
{
return d->type;
}
void PipelineState::step()
{
if (!d->pipeline) {
return;
}
d->idle = false;
if (d->filterIt.hasNext()) {
d->filterIt.next()->process(*this);
} else {
d->pipeline->pipelineCompleted(*this);
}
}
void PipelineState::processingCompleted(Preprocessor *filter)
{
if (d->pipeline && filter == d->filterIt.peekPrevious()) {
d->idle = true;
d->pipeline->pipelineStepped(*this);
}
}
Preprocessor::Preprocessor()
: d(0)
{
}
Preprocessor::~Preprocessor()
{
}
void Preprocessor::process(PipelineState state)
{
processingCompleted(state);
}
void Preprocessor::processingCompleted(PipelineState state)
{
state.processingCompleted(this);
}
} // namespace Akonadi2
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