| /* |
| * Copyright 2009-2014 Paul Merlin. |
| * Copyright 2011 Niclas Hedhman. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| * implied. |
| * |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.zest.entitystore.hazelcast; |
| |
| import com.hazelcast.config.ClasspathXmlConfig; |
| import com.hazelcast.config.Config; |
| import com.hazelcast.config.UrlXmlConfig; |
| import com.hazelcast.core.Hazelcast; |
| import com.hazelcast.core.HazelcastInstance; |
| import com.hazelcast.core.IMap; |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| import java.util.Map; |
| import org.apache.zest.api.configuration.Configuration; |
| import org.apache.zest.api.entity.EntityDescriptor; |
| import org.apache.zest.api.entity.EntityReference; |
| import org.apache.zest.api.injection.scope.This; |
| import org.apache.zest.api.service.ServiceActivation; |
| import org.apache.zest.io.Input; |
| import org.apache.zest.io.Output; |
| import org.apache.zest.io.Receiver; |
| import org.apache.zest.io.Sender; |
| import org.apache.zest.spi.entitystore.EntityNotFoundException; |
| import org.apache.zest.spi.entitystore.EntityStoreException; |
| import org.apache.zest.spi.entitystore.helpers.MapEntityStore; |
| |
| /** |
| * Hazelcast implementation of MapEntityStore. |
| */ |
| public class HazelcastEntityStoreMixin |
| implements ServiceActivation, HazelcastAccessors, MapEntityStore |
| { |
| |
| private static final String DEFAULT_MAPNAME = "qi4j:entitystore:data"; |
| |
| @This |
| private Configuration<HazelcastConfiguration> config; |
| |
| private IMap<String, String> stringMap; |
| private HazelcastInstance hazelcastInstance; |
| |
| @Override |
| public void activateService() |
| throws Exception |
| { |
| HazelcastConfiguration configuration = config.get(); |
| Config conf = createConfig( configuration ); |
| hazelcastInstance = Hazelcast.newHazelcastInstance( conf ); |
| String mapName = DEFAULT_MAPNAME; |
| if( configuration != null && configuration.mapName() != null ) |
| { |
| mapName = configuration.mapName().get(); |
| } |
| stringMap = hazelcastInstance.getMap( mapName ); |
| } |
| |
| @Override |
| public void passivateService() |
| throws Exception |
| { |
| stringMap = null; |
| hazelcastInstance.getLifecycleService().shutdown(); |
| } |
| |
| @Override |
| public HazelcastInstance hazelcastInstanceUsed() |
| { |
| return hazelcastInstance; |
| } |
| |
| @Override |
| public IMap hazelcastMapUsed() |
| { |
| return stringMap; |
| } |
| |
| @Override |
| public Reader get( EntityReference ref ) |
| throws EntityStoreException |
| { |
| final String serializedState = stringMap.get( ref.identity() ); |
| if( serializedState == null ) |
| { |
| throw new EntityNotFoundException( ref ); |
| } |
| return new StringReader( serializedState ); |
| } |
| |
| @Override |
| public void applyChanges( MapChanges changes ) |
| throws IOException |
| { |
| changes.visitMap( new MapChanger() |
| { |
| |
| @Override |
| public Writer newEntity( final EntityReference ref, EntityDescriptor entityDescriptor ) |
| throws IOException |
| { |
| return new StringWriter( 1000 ) |
| { |
| |
| @Override |
| public void close() |
| throws IOException |
| { |
| super.close(); |
| stringMap.put( ref.identity(), toString() ); |
| } |
| }; |
| } |
| |
| @Override |
| public Writer updateEntity( EntityReference ref, EntityDescriptor entityDescriptor ) |
| throws IOException |
| { |
| return newEntity( ref, entityDescriptor ); |
| } |
| |
| @Override |
| public void removeEntity( EntityReference ref, EntityDescriptor entityDescriptor ) |
| throws EntityNotFoundException |
| { |
| stringMap.remove( ref.identity() ); |
| } |
| } ); |
| } |
| |
| @Override |
| public Input<Reader, IOException> entityStates() |
| { |
| return new Input<Reader, IOException>() |
| { |
| @Override |
| public <ReceiverThrowableType extends Throwable> void transferTo( Output<? super Reader, ReceiverThrowableType> output ) |
| throws IOException, ReceiverThrowableType |
| { |
| output.receiveFrom( new Sender<Reader, IOException>() |
| { |
| @Override |
| public <RTT extends Throwable> void sendTo( Receiver<? super Reader, RTT> receiver ) |
| throws RTT, IOException |
| { |
| for( Map.Entry<String, String> eachEntry : stringMap.entrySet() ) |
| { |
| receiver.receive( new StringReader( eachEntry.getValue() ) ); |
| } |
| } |
| } ); |
| } |
| }; |
| } |
| |
| private Config createConfig( HazelcastConfiguration configuration ) |
| throws IOException |
| { |
| String hzConfLocation = configuration.configXmlLocation().get(); |
| if( hzConfLocation == null || hzConfLocation.isEmpty() ) |
| { |
| hzConfLocation = "hazelcast-default.xml"; |
| } |
| Config conf; |
| if( hzConfLocation.contains( ":" ) ) |
| { |
| conf = new UrlXmlConfig( hzConfLocation ); |
| } |
| else |
| { |
| conf = new ClasspathXmlConfig( hzConfLocation ); |
| } |
| return conf; |
| } |
| } |