/*************************************************************************
* Copyright 2009-2014 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.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.component;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.NoSuchElementException;
import org.apache.log4j.Logger;
import com.eucalyptus.bootstrap.ServiceJarDiscovery;
import com.eucalyptus.component.annotation.ComponentMessage;
import com.eucalyptus.system.Ats;
import com.google.common.base.Predicates;
import com.google.common.collect.Maps;
import edu.ucsb.eucalyptus.msgs.BaseMessage;
import edu.ucsb.eucalyptus.msgs.BaseMessageMarker;
public class ComponentMessages {
private static Logger LOG = Logger.getLogger( ComponentMessages.class );
private static final Map<Class<? extends BaseMessageMarker>,Class<? extends ComponentId>> compIdMap = Maps.newHashMap();
public static Collection<Class<? extends BaseMessageMarker>> forComponent( ComponentId compId ) {
Class<? extends ComponentId> compIdClass = compId.getClass( );
if ( !compIdMap.containsValue( compIdClass ) ) {
return Collections.emptyList();
} else {
return Maps.filterValues( compIdMap, Predicates.<Object>equalTo( compIdClass ) ).keySet( );
}
}
public static <T extends BaseMessage> Class<? extends ComponentId> lookup( T msg ) {
Class<?> msgType = Ats.inClassHierarchy( msg ).findAncestor( ComponentMessage.class );
if ( !compIdMap.containsKey( msgType ) ) {
throw new NoSuchElementException( "No ComponentMessage with name: " + msgType );
} else {
return compIdMap.get( msgType );
}
}
public static void register( Class<? extends BaseMessageMarker> componentMsg ) {
@SuppressWarnings( "unchecked" )
Class<? extends ComponentId> componentIdClass = Ats.from( componentMsg ).get( ComponentMessage.class ).value( );
compIdMap.put( componentMsg, componentIdClass );
}
public static class ComponentMessageDiscovery extends ServiceJarDiscovery {
@SuppressWarnings( "unchecked" )
@Override
public boolean processClass( Class candidate ) throws Exception {
if ( BaseMessageMarker.class.isAssignableFrom( candidate )
&& candidate.getAnnotation( ComponentMessage.class ) != null ) {
try {
ComponentMessages.register( candidate );
} catch ( Exception ex ) {
LOG.error( ex, ex );
}
return true;
} else {
return false;
}
}
@Override
public Double getPriority( ) {
return 0.0d;
}
}
}