/*************************************************************************
* Copyright 2009-2012 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.lang.reflect.Modifier;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import com.eucalyptus.bootstrap.Handles;
import com.eucalyptus.bootstrap.ServiceJarDiscovery;
import com.eucalyptus.component.annotation.ComponentPart;
import com.eucalyptus.records.Logs;
import com.eucalyptus.system.Ats;
import com.eucalyptus.util.Exceptions;
import com.eucalyptus.util.techpreview.TechPreviews;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import edu.ucsb.eucalyptus.msgs.BaseMessage;
public class ServiceBuilders {
private static Logger LOG = Logger.getLogger( ServiceBuilders.class );
private static Map<Class<? extends BaseMessage>, ServiceBuilder<? extends ServiceConfiguration>> builders = Maps.newConcurrentMap( );
private static Map<Class<? extends ComponentId>, ServiceBuilder<? extends ServiceConfiguration>> componentBuilders = Maps.newConcurrentMap( );
public static class ServiceBuilderDiscovery extends ServiceJarDiscovery {
@Override
public Double getPriority( ) {
return 0.2;
}
@Override
public boolean processClass( Class candidate ) throws Exception {
if ( ServiceBuilder.class.isAssignableFrom( candidate ) && !Modifier.isAbstract( candidate.getModifiers( ) )
&& !Modifier.isInterface( candidate.getModifiers( ) ) ) {
/** GRZE: this implies that service builder is a singleton **/
ServiceBuilder b = ( ServiceBuilder ) candidate.newInstance( );
Ats ats = Ats.from( candidate );
if ( !ats.has( ComponentPart.class ) ) {
Exception ex = Exceptions.noSuchElement( "@ComponentPart(Class<? extends ComponentId>) is missing: " + candidate );
LOG.error( ex.getMessage( ) );
Logs.extreme( ).error( ex, ex );
} else {
ComponentPart at = ats.get( ComponentPart.class );
ServiceBuilders.addComponentBuilder( at.value( ), b );
}
if ( !ats.has( Handles.class ) ) {
Exception ex = Exceptions.noSuchElement( "@Handles(Class<? extends BaseMessage>) is missing: " + candidate );
LOG.error( ex.getMessage( ) );
Logs.extreme( ).error( ex, ex );
} else {
for ( Class<? extends BaseMessage> c : ats.get( Handles.class ).value( ) ) {
ServiceBuilders.addMessageBuilder( c, b );
}
}
return true;
} else {
return false;
}
}
}
private static void addMessageBuilder( Class<? extends BaseMessage> c, ServiceBuilder b ) {
LOG.trace( "Registered service builder for " + c.getSimpleName( )
+ " -> "
+ b.getClass( ).getCanonicalName( ) );
builders.put( c, b );
}
private static void addComponentBuilder( Class<? extends ComponentId> c, ServiceBuilder b ) {
LOG.trace( "Registered service builder for " + c.getSimpleName( )
+ " -> "
+ b.getClass( ).getCanonicalName( ) );
componentBuilders.put( c, b );
}
public static ServiceBuilder<? extends ServiceConfiguration> handles( Class<? extends BaseMessage> handlesType ) {
return builders.get( handlesType );
}
public static <T extends ServiceBuilder<? extends ServiceConfiguration>> T lookup( ComponentId componentId ) {
try {
return lookup( componentId.getClass( ) );
} catch ( Exception ex ) {
LOG.error( ex, ex );
throw new RuntimeException( ex );
}
}
public static <T extends ServiceBuilder<? extends ServiceConfiguration>> T lookup( Class<? extends ComponentId> componentId ) {
if ( !componentBuilders.containsKey( componentId ) ) {
Component comp = Components.lookup( componentId );
componentBuilders.put( componentId, new DummyServiceBuilder( comp.getComponentId( ) ) );
}
return ( T ) componentBuilders.get( componentId );
}
public static List<Class<? extends ComponentId>> listRegisterableComponents( ) {
return Lists.newArrayList( Iterables.filter( componentBuilders.keySet(), comp -> !TechPreviews.check( comp ) ) );
}
}