/*************************************************************************
* Copyright 2009-2013 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
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*
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*
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* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
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* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.component.events;
import java.util.concurrent.Future;
import com.eucalyptus.component.Topology;
import com.google.common.base.Joiner;
import org.apache.log4j.Logger;
import com.eucalyptus.bootstrap.Host;
import com.eucalyptus.bootstrap.Hosts;
import com.eucalyptus.component.Component;
import com.eucalyptus.component.ComponentRegistrationHandler;
import com.eucalyptus.component.ServiceConfiguration;
import com.eucalyptus.component.ServiceConfigurations;
import com.eucalyptus.empyrean.DisableServiceType;
import com.eucalyptus.empyrean.Empyrean;
import com.eucalyptus.empyrean.EnableServiceType;
import com.eucalyptus.empyrean.ServiceId;
import com.eucalyptus.empyrean.ServiceTransitionType;
import com.eucalyptus.empyrean.StartServiceType;
import com.eucalyptus.empyrean.StopServiceType;
import com.eucalyptus.event.Event;
import com.eucalyptus.event.EventFailedException;
import com.eucalyptus.event.ListenerRegistry;
import com.eucalyptus.util.Exceptions;
import com.eucalyptus.util.TypeMappers;
import com.eucalyptus.util.async.AsyncRequests;
import com.eucalyptus.util.async.Futures;
import com.google.common.base.Function;
/**
* @author chris grzegorczyk <grze@eucalyptus.com>
*/
public class ServiceEvents {
private static Logger LOG = Logger.getLogger( ServiceEvents.class );
public static void fire( final ServiceConfiguration config, Component.State state ) {
try {
ServiceTransitionType msg = null;
switch ( state ) {
case ENABLED:
msg = new EnableServiceType( );
break;
case DISABLED:
msg = new DisableServiceType( );
break;
case STOPPED:
msg = new StopServiceType( );
break;
//TODO:GRZE: Handle other state transitions here.
// case INITIALIZED:
// case LOADED:
case NOTREADY:
msg = new StartServiceType( );
break;
default:
break;
}
if ( msg != null ) {
msg.getServices( ).add( TypeMappers.transform( config, ServiceId.class ) );
for ( Host h : Hosts.list( ) ) {
if ( !h.isLocalHost( ) && !h.getHostAddresses( ).contains( config.getInetAddress( ) ) ) {
try {
AsyncRequests.sendSync( ServiceConfigurations.createEphemeral( Empyrean.INSTANCE, h.getBindAddress( ) ), msg );
} catch ( Exception ex ) {
LOG.error( ex, ex );
}
}
}
}
} catch ( Exception ex ) {
LOG.error( ex, ex );
}
}
public static RegistrationBuilder forConfiguration( final ServiceConfiguration configuration ) {
return new RegistrationBuilder( ) {
{
this.config = configuration;
}
};
}
public enum DeregisterFunction implements Function<ServiceConfiguration, Future<ServiceConfiguration>> {
INSTANCE;
@Override
public Future<ServiceConfiguration> apply( ServiceConfiguration input ) {
return ServiceEvents.forConfiguration( input ).deregister( );
}
}
public static Function<? super ServiceConfiguration, Future<ServiceConfiguration>> deregisterFunction( ) {
return DeregisterFunction.INSTANCE;
}
public enum RegisterFunction implements Function<ServiceConfiguration, Future<ServiceConfiguration>> {
INSTANCE;
@Override
public Future<ServiceConfiguration> apply( ServiceConfiguration input ) {
return ServiceEvents.forConfiguration( input ).register( );
}
}
public static Function<? super ServiceConfiguration, Future<ServiceConfiguration>> registerFunction( ) {
return RegisterFunction.INSTANCE;
}
public static class RegistrationBuilder {
ServiceConfiguration config;
public Future<ServiceConfiguration> register( ) {
LOG.debug( "Registering: " + config );
try {
ServiceConfiguration resultConfig = ComponentRegistrationHandler.register( config.getComponentId( ),
config.getPartition( ),
config.getName( ),
config.getHostName( ),
config.getPort( ) );
if ( resultConfig != null ) {
ServiceEvent event = new RegistrationEvent( ).setConfiguration( resultConfig );
try {
ListenerRegistry.getInstance( ).fireEvent( event );
} catch ( EventFailedException e ) {
LOG.trace( e );
}
return Futures.predestinedFuture( resultConfig );
} else {
return Futures.predestinedFuture( config );//GRZE:SIGH: where is this case actually needed...
}
} catch ( Exception e ) {
final String errorMessage = Joiner.on( " " ).join( "Registering ", config.getFullName( ), " failed because of ", e.getMessage( ) );
LOG.debug( errorMessage );
LOG.trace( e, e );
return Futures.<ServiceConfiguration> predestinedFailedFuture( Exceptions.toUndeclared( errorMessage ) );
}
}
public Future<ServiceConfiguration> deregister( ) {
LOG.debug( "Deregistering: " + config );
try {
ServiceConfiguration resultConfig = ComponentRegistrationHandler.deregister( config.getComponentId( ), config.getName( ) );
if ( resultConfig != null ) {
DeregistrationEvent event = new DeregistrationEvent().setConfiguration( resultConfig );
try {
ListenerRegistry.getInstance().fireEvent( event );
} catch ( EventFailedException e ) {
LOG.trace( e );
}
try {
Topology.destroy( resultConfig ).get();
} catch ( Exception e ) {
LOG.error( e );
}
return Futures.predestinedFuture( resultConfig );
} else {
return Futures.predestinedFuture( config );//GRZE:SIGH: where is this case actually needed...
}
} catch ( Exception e ) {
final String errorMessage = Joiner.on( " " ).join( "Deregistering ", config.getFullName( ), " failed because of ", e.getMessage( ) );
LOG.debug( errorMessage );
LOG.trace( e, e );
return Futures.<ServiceConfiguration> predestinedFailedFuture( Exceptions.toUndeclared( errorMessage ) );
}
}
}
public static class ServiceEvent implements Event {
private ServiceConfiguration configuration;
public ServiceConfiguration getConfiguration( ) {
return configuration;
}
public <T extends ServiceEvent> T setConfiguration( ServiceConfiguration configuration ) {
this.configuration = configuration;
return ( T ) this;
}
}
public static class EnabledEvent extends ServiceEvent {}
public static class DisabledEvent extends ServiceEvent {}
public static class NotreadyEvent extends ServiceEvent {}
public static class StartedEvent extends ServiceEvent {}
public static class StoppedEvent extends ServiceEvent {}
public static class RegistrationEvent extends ServiceEvent {}
public static class UpdateRegistrationEvent extends ServiceEvent {}
public static class DeregistrationEvent extends ServiceEvent {}
}