001    /**
002     * 
003     * Copyright 2005 LogicBlaze, Inc. http://www.logicblaze.com
004     * 
005     * Licensed under the Apache License, Version 2.0 (the "License"); 
006     * you may not use this file except in compliance with the License. 
007     * You may obtain a copy of the License at 
008     * 
009     * http://www.apache.org/licenses/LICENSE-2.0
010     * 
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS, 
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
014     * See the License for the specific language governing permissions and 
015     * limitations under the License. 
016     * 
017     **/
018    package org.jencks;
019    
020    import java.lang.reflect.Method;
021    
022    import javax.jms.MessageListener;
023    import javax.resource.spi.LocalTransaction;
024    import javax.resource.spi.UnavailableException;
025    import javax.resource.spi.endpoint.MessageEndpoint;
026    import javax.resource.spi.endpoint.MessageEndpointFactory;
027    import javax.transaction.TransactionManager;
028    import javax.transaction.xa.XAResource;
029    
030    import org.apache.geronimo.transaction.manager.NamedXAResource;
031    import org.apache.geronimo.transaction.manager.WrapperNamedXAResource;
032    
033    /**
034     * @version $Revision: 1.5 $
035     */
036    public abstract class EndpointFactorySupport implements MessageEndpointFactory {
037        protected TransactionManager transactionManager;
038        private String name;
039    
040        public MessageEndpoint createEndpoint(XAResource xaResource) throws UnavailableException {
041            MessageListener messageListener = createMessageListener();
042            xaResource = wrapXAResource(xaResource);
043            if (transactionManager != null) {
044                return new XAEndpoint(messageListener, xaResource, transactionManager);
045            }
046            else if (xaResource instanceof LocalTransaction) {
047                return new LocalTransactionEndpoint(messageListener, (LocalTransaction) xaResource);
048            }
049            return new AcknowledgeEndpoint(messageListener);
050        }
051    
052        public String toString() {
053            return super.toString() + "[transactionManager=" + transactionManager + "]";
054        }
055    
056        // Properties
057        //-------------------------------------------------------------------------
058        public boolean isDeliveryTransacted(Method method) throws NoSuchMethodException {
059            return transactionManager != null;
060        }
061    
062        public TransactionManager getTransactionManager() {
063            return transactionManager;
064        }
065    
066        public void setTransactionManager(TransactionManager transactionManager) {
067            this.transactionManager = transactionManager;
068        }
069    
070        public String getName() {
071            return name;
072        }
073    
074        public void setName(String name) {
075            this.name = name;
076        }
077    
078        // Implementation methods
079        //-------------------------------------------------------------------------
080        protected abstract MessageListener createMessageListener() throws UnavailableException;
081    
082        /**
083         * {@link XAResource} instances must be named to support recovery, so either pass
084         * {@link NamedXAResource} instances through or wrap with the Spring name.
085         *
086         * @param xaResource
087         * @return the wrapped XAResource instance
088         */
089        protected XAResource wrapXAResource(XAResource xaResource) {
090            String name = getName();
091            if (xaResource instanceof NamedXAResource || name == null) {
092                return xaResource;
093            }
094            return new WrapperNamedXAResource(xaResource, name);
095        }
096    
097    }