org.eclipse.persistence.sessions.coordination.MergeChangeSetCommand Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation

EclipseLink build based upon Git transaction 346465e

There is a newer version: 5.0.0-B05

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
 ******************************************************************************/
package org.eclipse.persistence.sessions.coordination;

import org.eclipse.persistence.internal.sessions.*;

/**
 * 
 * Purpose: Provide a remote command implementation for remote cache
 * merges of changes.
 * 

 * Description: This command provides the implementation for cache
 * synchronization using RCM.
 * 
 * @author Steven Vo
 * @since OracleAS TopLink 10g (9.0.4)
 *
 */
public class MergeChangeSetCommand extends Command {

    /** The changes to be applied remotely */
    protected UnitOfWorkChangeSet changeSet;

    /**
     * INTERNAL:
     * Return the changes to be applied
     */
    public UnitOfWorkChangeSet getChangeSet(AbstractSession session) {
        return changeSet;
    }

    /**
     * INTERNAL:
     * Set the changes to be applied
     */
    public void setChangeSet(UnitOfWorkChangeSet newChangeSet) {
        changeSet = newChangeSet;
    }

    /**
     * INTERNAL:
     * This method will be invoked by the RCM only when the CommandProcessor is a
     * TopLink session. The session will be passed in for the command to use.
     */
    public void executeWithSession(AbstractSession session) {
        MergeManager manager = new MergeManager(session);
        manager.mergeIntoDistributedCache();
        manager.setCascadePolicy(MergeManager.CASCADE_ALL_PARTS);

        // Do the main merge
        manager.mergeChangesFromChangeSet(getChangeSet(session));
    }
}