/******************************************************************************* | |
* Copyright (c) 1998, 2013 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.internal.sequencing; | |
import org.eclipse.persistence.sessions.server.ClientSession; | |
import org.eclipse.persistence.sessions.remote.DistributedSession; | |
import org.eclipse.persistence.internal.sessions.remote.RemoteConnection; | |
import org.eclipse.persistence.internal.sessions.AbstractSession; | |
import org.eclipse.persistence.internal.sessions.DatabaseSessionImpl; | |
import org.eclipse.persistence.sessions.broker.SessionBroker; | |
/** | |
* SequencingFactory is private to EclipseLink. | |
* It instantiates sequencing classes for sessions. | |
* It allows sequencing classes to be encapsulated in | |
* this package. | |
* | |
* @see ClientSessionSequencing | |
* @see RemoteConnectionSequencing | |
* @see SessionBrokerSequencing | |
* @see SequencingManager | |
* | |
*/ | |
public class SequencingFactory { | |
/** | |
* INTERNAL: | |
* Takes a potential owner - a Session, returns Sequencing object. | |
* Note that before creating a Sequencing object there is a check performed | |
* to determine whether the object could be created. | |
*/ | |
public static Sequencing createSequencing(AbstractSession session) { | |
Sequencing sequencing = null; | |
if (session.isClientSession()) { | |
ClientSession cs = (ClientSession)session; | |
if (ClientSessionSequencing.sequencingServerExists(cs)) { | |
sequencing = new ClientSessionSequencing(cs); | |
} | |
} else if (session.isRemoteSession()) { | |
RemoteConnection con = ((DistributedSession)session).getRemoteConnection(); | |
if (RemoteConnectionSequencing.masterSequencingExists(con)) { | |
sequencing = new RemoteConnectionSequencing(con); | |
} | |
} else if (session.isBroker()) { | |
SessionBroker br = (SessionBroker)session; | |
if (SessionBrokerSequencing.atLeastOneSessionHasSequencing(br)) { | |
sequencing = new SessionBrokerSequencing(br); | |
} | |
} | |
return sequencing; | |
} | |
/** | |
* INTERNAL: | |
* Takes a potential owner - a DatabaseSession, returns SequencingHome object. | |
* Only DatabaseSession and ServerSession should be passed (not SessionBroker). | |
*/ | |
public static SequencingHome createSequencingHome(DatabaseSessionImpl ownerSession) { | |
SequencingHome home = null; | |
if (!ownerSession.isBroker()) { | |
home = new SequencingManager(ownerSession); | |
} | |
return home; | |
} | |
} |