PartitionNotices.java from SmartFrog at Krugle
Show PartitionNotices.java syntax highlighted
/** (C) Copyright 1998-2005 Hewlett-Packard Development Company, LP
This library 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 library 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 library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
For more information: www.smartfrog.org
*/
package org.smartfrog.services.anubis.components.examples;
import java.net.InetAddress;
import java.rmi.RemoteException;
import org.smartfrog.services.anubis.partition.Partition;
import org.smartfrog.services.anubis.partition.PartitionNotification;
import org.smartfrog.services.anubis.partition.views.View;
import org.smartfrog.sfcore.common.SmartFrogException;
import org.smartfrog.sfcore.prim.Prim;
import org.smartfrog.sfcore.prim.PrimImpl;
import org.smartfrog.sfcore.prim.TerminationRecord;
import org.smartfrog.sfcore.reference.Reference;
public class PartitionNotices
extends PrimImpl
implements Prim, PartitionNotification {
static private Reference PARTITION_REF = new Reference("partitionManager");
private Partition partition = null;
private boolean isStable = false;
public PartitionNotices() throws Exception { super(); }
public void sfDeploy() throws SmartFrogException, RemoteException {
try {
super.sfDeploy();
partition = (Partition)sfResolve(PARTITION_REF);
partition.register(this);
}
catch (Exception ex) {
throw (SmartFrogException)SmartFrogException.forward(ex);
}
}
public void sfStart() throws SmartFrogException, RemoteException {
try {
super.sfStart();
}
catch (Exception ex) {
throw (SmartFrogException)SmartFrogException.forward(ex);
}
}
public void sfTerminateWith(TerminationRecord tr) {
partition.deregister(this);
super.sfTerminateWith(tr);
}
public void partitionNotification(View view, int leader) {
if( view.isStable() != isStable ) {
isStable = view.isStable();
if( isStable ) {
InetAddress leaderAddr = partition.getNodeAddress(leader);
System.out.println("****** Partition has stablized with " + view.cardinality() + " members" );
System.out.println("****** The leader is node " + leader + " at " + leaderAddr.toString());
} else {
System.out.println("****** Partition is UNSTABLE");
}
}
}
public void objectNotification(Object obj, int sender, long time) {
return;
}
}
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