001 /*
002 * JBoss DNA (http://www.jboss.org/dna)
003 * See the COPYRIGHT.txt file distributed with this work for information
004 * regarding copyright ownership. Some portions may be licensed
005 * to Red Hat, Inc. under one or more contributor license agreements.
006 * See the AUTHORS.txt file in the distribution for a full listing of
007 * individual contributors.
008 *
009 * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
010 * is licensed to you under the terms of the GNU Lesser General Public License as
011 * published by the Free Software Foundation; either version 2.1 of
012 * the License, or (at your option) any later version.
013 *
014 * JBoss DNA is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017 * Lesser General Public License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this software; if not, write to the Free
021 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
022 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
023 */
024 package org.jboss.dna.connector.jbosscache;
025
026 import java.util.concurrent.TimeUnit;
027 import javax.transaction.xa.XAResource;
028 import org.jboss.dna.graph.ExecutionContext;
029 import org.jboss.dna.graph.cache.CachePolicy;
030 import org.jboss.dna.graph.connector.RepositoryConnection;
031 import org.jboss.dna.graph.connector.RepositorySourceException;
032 import org.jboss.dna.graph.connector.RepositorySourceListener;
033 import org.jboss.dna.graph.request.Request;
034 import org.jboss.dna.graph.request.processor.RequestProcessor;
035
036 /**
037 * The repository connection to a JBoss Cache instance.
038 *
039 * @author Randall Hauch
040 */
041 public class JBossCacheConnection implements RepositoryConnection {
042
043 protected static final RepositorySourceListener NO_OP_LISTENER = new RepositorySourceListener() {
044
045 /**
046 * {@inheritDoc}
047 */
048 public void notify( String sourceName,
049 Object... events ) {
050 // do nothing
051 }
052 };
053
054 private final JBossCacheSource source;
055 private final JBossCacheWorkspaces workspaces;
056 private RepositorySourceListener listener = NO_OP_LISTENER;
057
058 JBossCacheConnection( JBossCacheSource source,
059 JBossCacheWorkspaces workspaces ) {
060 assert source != null;
061 assert workspaces != null;
062 this.source = source;
063 this.workspaces = workspaces;
064 }
065
066 /**
067 * {@inheritDoc}
068 */
069 public String getSourceName() {
070 return source.getName();
071 }
072
073 /**
074 * {@inheritDoc}
075 */
076 public CachePolicy getDefaultCachePolicy() {
077 return source.getDefaultCachePolicy();
078 }
079
080 /**
081 * {@inheritDoc}
082 */
083 public XAResource getXAResource() {
084 return null;
085 }
086
087 /**
088 * {@inheritDoc}
089 */
090 public boolean ping( long time,
091 TimeUnit unit ) {
092 return true;
093 }
094
095 /**
096 * {@inheritDoc}
097 */
098 public void setListener( RepositorySourceListener listener ) {
099 this.listener = listener != null ? listener : NO_OP_LISTENER;
100 }
101
102 /**
103 * {@inheritDoc}
104 */
105 public void close() {
106 // do nothing
107 }
108
109 /**
110 * {@inheritDoc}
111 *
112 * @see org.jboss.dna.graph.connector.RepositoryConnection#execute(org.jboss.dna.graph.ExecutionContext,
113 * org.jboss.dna.graph.request.Request)
114 */
115 public void execute( final ExecutionContext context,
116 final Request request ) throws RepositorySourceException {
117 RequestProcessor processor = new JBossCacheRequestProcessor(getSourceName(), context, workspaces,
118 source.getNameOfDefaultWorkspace(),
119 source.isCreatingWorkspacesAllowed());
120 try {
121 processor.process(request);
122 } finally {
123 processor.close();
124 }
125 }
126
127 /**
128 * @return listener
129 */
130 protected RepositorySourceListener getListener() {
131 return this.listener;
132 }
133 }