/******************************************************************************* | |
* Copyright (c) 2011, 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: | |
* James Sutherland (Oracle) - initial API and implementation | |
******************************************************************************/ | |
package org.eclipse.persistence.descriptors.partitioning; | |
import java.util.ArrayList; | |
import java.util.List; | |
import org.eclipse.persistence.internal.databaseaccess.Accessor; | |
import org.eclipse.persistence.internal.sessions.AbstractRecord; | |
import org.eclipse.persistence.internal.sessions.AbstractSession; | |
import org.eclipse.persistence.queries.DatabaseQuery; | |
/** | |
* PUBLIC: | |
* PinnedPartitionPolicy pins requests to a single connection pool. | |
* @author James Sutherland | |
* @since EclipseLink 2.2 | |
*/ | |
public class PinnedPartitioningPolicy extends PartitioningPolicy { | |
protected String connectionPool; | |
public PinnedPartitioningPolicy() { | |
super(); | |
} | |
public PinnedPartitioningPolicy(String pool) { | |
this(); | |
this.connectionPool = pool; | |
} | |
/** | |
* PUBLIC: | |
* Return the connection pool to pin queries to. | |
*/ | |
public String getConnectionPool() { | |
return connectionPool; | |
} | |
/** | |
* PUBLIC: | |
* Set the connection pool to pin queries to. | |
*/ | |
public void setConnectionPool(String connectionPool) { | |
this.connectionPool = connectionPool; | |
} | |
/** | |
* INTERNAL: | |
* Get a connection from each pool. | |
*/ | |
public List<Accessor> getConnectionsForQuery(AbstractSession session, DatabaseQuery query, AbstractRecord arguments) { | |
if (session.getPlatform().hasPartitioningCallback()) { | |
// UCP support. | |
session.getPlatform().getPartitioningCallback().setPartitionId(this.connectionPool.hashCode()); | |
return null; | |
} | |
List<Accessor> accessors = new ArrayList<Accessor>(1); | |
accessors.add(getAccessor(this.connectionPool, session, query, false)); | |
return accessors; | |
} | |
} |