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package com.sun.enterprise.naming.impl;
import java.util.List;
import com.sun.corba.ee.spi.folb.GroupInfoServiceObserver;
import com.sun.corba.ee.spi.folb.GroupInfoService;
import com.sun.corba.ee.spi.folb.ClusterInstanceInfo;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
/**
* Called when the GroupInfoService that you register with
* has a change. You should call the GroupInfoService
* <code>getClusterInstanceInfo</code> method to get
* updated info.
* @author Ken Cavanaugh
* @author Sheetal Vartak
*/
public class GroupInfoServiceObserverImpl
implements GroupInfoServiceObserver {
protected static final Logger _logger = LogDomains.getLogger(
GroupInfoServiceObserverImpl.class, LogDomains.JNDI_LOGGER);
private static void doLog( Level level, String fmt, Object... args ) {
if (_logger.isLoggable(level)) {
_logger.log( level, fmt, args ) ;
}
}
private static void fineLog( String fmt, Object... args ) {
doLog( Level.FINE, fmt, args ) ;
}
private GroupInfoService gis;
private RoundRobinPolicy rr ;
public GroupInfoServiceObserverImpl(GroupInfoService gis,
RoundRobinPolicy rr ) {
this.gis = gis;
this.rr = rr ;
}
// This method is called for internally forced updates:
// see SerialInitContextFactory.getInitialContext.
public void forceMembershipChange() {
fineLog( "GroupInfoServiceObserverImpl.forceMembershipChange called") ;
doMembershipChange() ;
}
@Override
// This method is called when the client is informed about a cluster
// membership change through ClientGroupManager.receive_star.
public void membershipChange() {
fineLog( "GroupInfoServiceObserverImpl.membershipChange called") ;
doMembershipChange() ;
}
private void doMembershipChange() {
try {
List<ClusterInstanceInfo> instanceInfoList =
gis.getClusterInstanceInfo((String[])null, rr.getHostPortList() );
if (instanceInfoList != null && instanceInfoList.size() > 0) {
rr.setClusterInstanceInfo(instanceInfoList);
}
} catch(Exception e) {
_logger.log(Level.SEVERE,
"groupinfoservice.membership.notification.problem", new Object[] {e});
}
}
}