transactionjobs.h

/*
    SPDX-FileCopyrightText: 2006 Volker Krause <[email protected]>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
*/
 
#pragma once
 
#include "akonadicore_export.h"
#include "job.h"
 
namespace Akonadi
{
class TransactionJobPrivate;
class AKONADICORE_EXPORT TransactionJob : public Job
{
    Q_OBJECT
 
public:
    ~TransactionJob() override;
 
protected:
    explicit TransactionJob(QObject *parent);
 
    void doStart() override;
    bool doHandleResponse(qint64 tag, const Protocol::CommandPtr &response) override;
 
private:
    Q_DECLARE_PRIVATE(TransactionJob)
};
 
class TransactionJobPrivate;
 
/**
 * @short Job that begins a session-global transaction.
 *
 * Sometimes you want to execute a sequence of commands in
 * an atomic way, so that either all commands or none shall
 * be executed. The TransactionBeginJob, TransactionCommitJob and
 * TransactionRollbackJob provide these functionality for the
 * Akonadi Job classes.
 *
 * @note This will only have an effect when used as a subjob or with a Session.
 *
 * @author Volker Krause <[email protected]>
 */
class AKONADICORE_EXPORT TransactionBeginJob : public TransactionJob
{
    Q_OBJECT
 
public:
    /**
     * Creates a new transaction begin job.
     *
     * @param parent The parent job or Session, must not be 0.
     */
    explicit TransactionBeginJob(QObject *parent);
 
    /**
     * Destroys the transaction begin job.
     */
    ~TransactionBeginJob() override;
};
 
/**
 * @short Job that aborts a session-global transaction.
 *
 * If a job inside a TransactionBeginJob has been failed,
 * the TransactionRollbackJob can be used to rollback all changes done by these
 * jobs.
 *
 * @note This will only have an effect when used as a subjob or with a Session.
 *
 * @author Volker Krause <[email protected]>
 */
class AKONADICORE_EXPORT TransactionRollbackJob : public TransactionJob
{
    Q_OBJECT
 
public:
    /**
     * Creates a new transaction rollback job.
     * The parent must be the same parent as for the TransactionBeginJob.
     *
     * @param parent The parent job or Session, must not be 0.
     */
    explicit TransactionRollbackJob(QObject *parent);
 
    /**
     * Destroys the transaction rollback job.
     */
    ~TransactionRollbackJob() override;
};
 
/**
 * @short Job that commits a session-global transaction.
 *
 * This job commits all changes of this transaction.
 *
 * @author Volker Krause <[email protected]>
 */
class AKONADICORE_EXPORT TransactionCommitJob : public TransactionJob
{
    Q_OBJECT
 
public:
    /**
     * Creates a new transaction commit job.
     * The parent must be the same parent as for the TransactionBeginJob.
     *
     * @param parent The parent job or Session, must not be 0.
     */
    explicit TransactionCommitJob(QObject *parent);
 
    /**
     * Destroys the transaction commit job.
     */
    ~TransactionCommitJob() override;
};
 
}