/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2012 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.search.backend.impl.jgroups;
import org.jgroups.Address;
import org.jgroups.Message;
import org.jgroups.View;
/**
* <p>This {@link org.hibernate.search.backend.impl.jgroups.NodeSelectorStrategy} is a static configuration for the local
* node to avoid processing any indexing operations locally.
* It is assumed that some other node in the cluster will process it; which
* node exactly is unknown, so messages are broadcasted to the group.</p>
*
* <p>There is no guarantee of processing: if no master picks up the task,
* the index update operation is skipped. This can be mitigated by making
* sure at least one master is always online; if a persistent queue is
* needed it's better to use the JMS backend.</p>
*
* <p>This implementation matches the {@literal jgroupsSlave} configuration property.</p>
*
* @author Sanne Grinovero <sanne@hibernate.org> (C) 2012 Red Hat Inc.
*/
public class SlaveNodeSelector implements NodeSelectorStrategy {
private Address localAddress;
@Override
public boolean isIndexOwnerLocal() {
return false;
}
@Override
public void setLocalAddress(Address address) {
this.localAddress = address;
}
@Override
public void viewAccepted(View view) {
//nothing to do
}
@Override
public Message createMessage(byte[] data) {
return new Message( null, localAddress, data );
}
}