oracle.toplink.essentials.internal.sequencing.ClientSessionSequencing Maven / Gradle / Ivy
/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
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// Copyright (c) 1998, 2007, Oracle. All rights reserved.
package oracle.toplink.essentials.internal.sequencing;
import oracle.toplink.essentials.internal.sequencing.Sequencing;
import oracle.toplink.essentials.threetier.ClientSession;
/**
* ClientSessionSequencing is private to TopLink.
* It provides sequencing for ClientSession.
* It contains a reference to SequencingServer object owned by
* ClientSession's parent ServerSession.
*
* @see SequencingServer
* @see oracle.toplink.essentials.threetier.ClientSession
*
*/
class ClientSessionSequencing implements Sequencing {
// ownerClientSession
protected ClientSession clientSession;
// SequencingServer owned by clientSession's parent SrverSession
protected SequencingServer sequencingServer;
/**
* INTERNAL:
* Takes a potential owner - ClientSession as an argument.
* This static method is called before an instance of this class is created.
* The goal is to verify whether the instance of ClientSessionSequencing should be created.
*/
public static boolean sequencingServerExists(ClientSession cs) {
return cs.getParent().getSequencingServer() != null;
}
/**
* INTERNAL:
* Takes an owner - ClientSession as an argument.
*/
public ClientSessionSequencing(ClientSession clientSession) {
this.clientSession = clientSession;
sequencingServer = clientSession.getParent().getSequencingServer();
}
/**
* INTERNAL:
* Simply calls the same method on SequencingServer
*/
public boolean shouldAcquireValueAfterInsert(Class cls) {
return sequencingServer.shouldAcquireValueAfterInsert(cls);
}
/**
* INTERNAL:
* Simply calls the same method on SequencingServer
*/
public int whenShouldAcquireValueForAll() {
return sequencingServer.whenShouldAcquireValueForAll();
}
/**
* INTERNAL:
* Simply calls the same method on SequencingServer
*/
public boolean shouldOverrideExistingValue(Class cls, Object existingValue) {
return sequencingServer.shouldOverrideExistingValue(cls, existingValue);
}
/**
* INTERNAL:
* This method is the reason for this class to exist:
* SequencingServer.getNextValue takes two arguments
* the first argument being a session which owns write connection
* (either DatabaseSession or ClientSession).
*/
public Object getNextValue(Class cls) {
return sequencingServer.getNextValue(clientSession, cls);
}
}