/*************************************************************************
* 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.
*
* Redistribution and use of this software in source and binary forms,
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*
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*
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* in the documentation and/or other materials provided with the
* distribution.
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
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* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
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* 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.groups;
import java.util.Collection;
import java.util.NoSuchElementException;
import org.apache.log4j.Logger;
import com.eucalyptus.component.ComponentId;
import com.eucalyptus.component.ComponentIds;
import com.eucalyptus.component.Components;
import com.eucalyptus.component.ServiceConfiguration;
import com.eucalyptus.util.Classes;
import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.Collections2;
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
/**
* @author chris grzegorczyk <grze@eucalyptus.com>
*/
public class ServiceGroups {
private static Logger LOG = Logger.getLogger( ServiceGroups.class );
enum ServiceGroupTableSupplier implements Supplier<Multimap<ServiceGroup, ? extends ComponentId>> {
INSTANCE {
@Override
public Multimap<ServiceGroup, ? extends ComponentId> get( ) {
return memo.get( );
}
},
REAL {
@Override
public Multimap<ServiceGroup, ? extends ComponentId> get( ) {
Multimap<ServiceGroup, ComponentId> map = ArrayListMultimap.create( );
for ( Class<? extends ComponentId> g : listGroups( ) ) {
ServiceGroup svc = ( ServiceGroup ) Classes.newInstance( g );
map.putAll( svc, svc.list( ) );
}
return map;
}
};
private static Supplier<Multimap<ServiceGroup, ? extends ComponentId>> memo = Suppliers.memoize( REAL );
}
public static ServiceGroup lookup( ServiceConfiguration config ) {
if ( isGroup( config ) ) {
return ( ServiceGroup ) config.getComponentId( );
} else {
throw new NoSuchElementException( "Failed to lookup service group for: " + config );
}
}
public static boolean isGroup( ServiceConfiguration config ) {
return config.getComponentId( ) instanceof ServiceGroup;
}
public static Collection<ServiceGroup> listMembership( ComponentId member ) {
Collection<ServiceGroup> members = Lists.newArrayList( );
for ( ServiceGroup g : ServiceGroupTableSupplier.INSTANCE.get( ).keySet( ) ) {
if ( g.apply( member ) ) {
members.add( g );
}
}
return members;
}
public static Collection<? extends ComponentId> listMembers( ServiceGroup g ) {
return ServiceGroupTableSupplier.INSTANCE.get( ).get( g );
}
public static Collection<Class<? extends ComponentId>> listGroups( ) {
return Collections2.filter( ComponentIds.listTypes( ), Classes.subclassOf( ServiceGroup.class ) );
}
public static Collection<ServiceConfiguration> list( final ServiceGroupConfiguration config ) {
Collection<ServiceConfiguration> members = Lists.newArrayList( );
for ( ComponentId compId : Collections2.filter( ComponentIds.list( ), config.lookupServiceGroup( ) ) ) {
members.addAll( Collections2.filter( Components.lookup( compId ).services( ), config.filterMembers() ) );
}
return members;
}
}