/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY 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 along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ha.singleton;
import org.jboss.ha.framework.interfaces.HAPartition;
import org.jboss.ha.framework.server.ClusterPartition;
import org.jboss.logging.Logger;
import org.jboss.system.ServiceMBeanSupport;
/**
* A base class for policy service that decides which node in the cluster should be
* the master node to run certain HASingleton service.
*
* @author <a href="mailto:afu@novell.com">Alex Fu</a>
* @version $Revision: 46010 $
*/
public abstract class HASingletonElectionPolicyBase
extends ServiceMBeanSupport
implements HASingletonElectionPolicyMBean
{
private Object mManagedSingleton;
private HAPartition mPartition;
/**
* @see HASingletonElectionPolicyMBean#setManagedSingleton(Object)
*/
public void setManagedSingleton(Object singleton)
{
this.mManagedSingleton = singleton;
}
/**
* @see HASingletonElectionPolicyMBean#getManagedSingleton()
*/
public Object getManagedSingleton()
{
return this.mManagedSingleton;
}
/**
* @see HASingletonElectionPolicyMBean#setHAPartition(HAPartition)
*/
public void setHAPartition(HAPartition partition)
{
this.mPartition = partition;
}
/**
* @see HASingletonElectionPolicyMBean#getHAPartition()
*/
public HAPartition getHAPartition()
{
return this.mPartition;
}
/**
* @see HASingletonElectionPolicyMBean#isElectedMaster()
*/
public boolean isElectedMaster()
{
if (null == this.mPartition)
throw new IllegalStateException("HAPartition is not set");
return pickSingleton().equals(this.mPartition.getClusterNode());
}
/**
* @see HASingletonElectionPolicyMBean#isElectedMaster(HAPartition)
*/
public boolean isElectedMaster(HAPartition partition)
{
if (null == partition)
throw new IllegalStateException("parameter cannot be null");
return pickSingleton(partition).equals(partition.getClusterNode());
}
}
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