diff options
Diffstat (limited to 'sca-java-1.x/tags/1.2/modules/binding-jms/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSBindingServiceBindingProvider.java')
-rw-r--r-- | sca-java-1.x/tags/1.2/modules/binding-jms/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSBindingServiceBindingProvider.java | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.2/modules/binding-jms/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSBindingServiceBindingProvider.java b/sca-java-1.x/tags/1.2/modules/binding-jms/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSBindingServiceBindingProvider.java new file mode 100644 index 0000000000..686a6fa477 --- /dev/null +++ b/sca-java-1.x/tags/1.2/modules/binding-jms/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSBindingServiceBindingProvider.java @@ -0,0 +1,222 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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.tuscany.sca.binding.jms.provider; + +import javax.jms.Destination; +import javax.jms.JMSException; +import javax.jms.Message; +import javax.jms.MessageConsumer; +import javax.jms.Session; +import javax.naming.NamingException; + +import org.apache.tuscany.sca.binding.jms.impl.JMSBinding; +import org.apache.tuscany.sca.binding.jms.impl.JMSBindingConstants; +import org.apache.tuscany.sca.binding.jms.impl.JMSBindingException; +import org.apache.tuscany.sca.interfacedef.Interface; +import org.apache.tuscany.sca.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.provider.ServiceBindingProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; +import org.apache.tuscany.sca.work.WorkScheduler; + +/** + * Implementation of the JMS service binding provider. + * + * @version $Rev$ $Date$ + */ +public class JMSBindingServiceBindingProvider implements ServiceBindingProvider { + + private RuntimeComponentService service; + private JMSBinding jmsBinding; + private JMSResourceFactory jmsResourceFactory; + private MessageConsumer consumer; + private WorkScheduler workScheduler; + private boolean running; + + public JMSBindingServiceBindingProvider(RuntimeComponent component, + RuntimeComponentService service, + JMSBinding binding, + WorkScheduler workScheduler) { + this.service = service; + this.jmsBinding = binding; + this.workScheduler = workScheduler; + + jmsResourceFactory = new JMSResourceFactory(binding.getConnectionFactoryName(), binding.getInitialContextFactoryName(), binding.getJndiURL()); + + if (jmsBinding.getDestinationName().equals(JMSBindingConstants.DEFAULT_DESTINATION_NAME)) { + // use the SCA service name as the default destination name + jmsBinding.setDestinationName(service.getName()); + } + + if (jmsBinding.getXMLFormat()) { + setXMLDataBinding(service); + } + + } + + protected void setXMLDataBinding(RuntimeComponentService service) { + if (service.getInterfaceContract() != null) { + try { + InterfaceContract ic = (InterfaceContract)service.getInterfaceContract().clone(); + + Interface ii = (Interface)ic.getInterface().clone(); + ii.resetDataBinding("org.apache.axiom.om.OMElement"); + ic.setInterface(ii); + service.setInterfaceContract(ic); + + } catch (CloneNotSupportedException e) { + throw new RuntimeException(e); + } + } + } + + public InterfaceContract getBindingInterfaceContract() { + return service.getInterfaceContract(); + } + + public boolean supportsOneWayInvocation() { + return true; + } + + public void start() { + this.running = true; + + try { + registerListerner(); + } catch (Exception e) { + throw new JMSBindingException("Error starting JMSServiceBinding", e); + } + } + + public void stop() { + this.running = false; + try { + consumer.close(); + jmsResourceFactory.closeConnection(); + } catch (Exception e) { + throw new JMSBindingException("Error stopping JMSServiceBinding", e); + } + } + + private void registerListerner() throws NamingException, JMSException { + + Session session = jmsResourceFactory.createSession(); + Destination destination = lookupDestinationQueue(); + + consumer = session.createConsumer(destination); + + final JMSBindingListener listener = new JMSBindingListener(jmsBinding, jmsResourceFactory, service); + try { + + consumer.setMessageListener(listener); + jmsResourceFactory.startConnection(); + + } catch (javax.jms.IllegalStateException e) { + + // setMessageListener not allowed in JEE container so use Tuscany threads + + jmsResourceFactory.startConnection(); + workScheduler.scheduleWork(new Runnable() { + public void run() { + try { + while (running) { + final Message msg = consumer.receive(); + workScheduler.scheduleWork(new Runnable() { + public void run() { + try { + listener.onMessage(msg); + } catch (Exception e) { + e.printStackTrace(); + } + }}); + } + } catch (Exception e) { + e.printStackTrace(); + } + }}); + } + } + + /** + * Looks up the Destination Queue for the JMS Binding. + * <p> + * What happens in the look up will depend on the create mode specified for the JMS Binding: + * <ul> + * <li>always - the JMS queue is always created. It is an error if the queue already exists + * <li>ifnotexist - the JMS queue is created if it does not exist. It is not an error if the queue already exists + * <li>never - the JMS queue is never created. It is an error if the queue does not exist + * </ul> + * See the SCA JMS Binding specification for more information. + * <p> + * + * @return The Destination queue. + * @throws NamingException Failed to lookup JMS queue + * @throws JMSBindingException Failed to lookup JMS Queue. Probable cause is that the JMS queue's current + * existance/non-existance is not compatible with the create mode specified on the binding + */ + private Destination lookupDestinationQueue() throws NamingException, JMSBindingException { + Destination destination = jmsResourceFactory.lookupDestination(jmsBinding.getDestinationName()); + + String qCreateMode = jmsBinding.getDestinationCreate(); + if (qCreateMode.equals(JMSBindingConstants.CREATE_ALWAYS)) { + // In this mode, the queue must not already exist as we are creating it + if (destination != null) { + throw new JMSBindingException("JMS Destination " + jmsBinding.getDestinationName() + + " already exists but has create mode of \"" + + qCreateMode + + "\" while registering service " + + service.getName() + + " listener"); + } + + // Create the queue + destination = jmsResourceFactory.createDestination(jmsBinding.getDestinationName()); + + } else if (qCreateMode.equals(JMSBindingConstants.CREATE_IF_NOT_EXIST)) { + // In this mode, the queue may nor may not exist. It will be created if it does not exist + if (destination == null) { + destination = jmsResourceFactory.createDestination(jmsBinding.getDestinationName()); + } + + } else if (qCreateMode.equals(JMSBindingConstants.CREATE_NEVER)) { + // In this mode, the queue must have already been created. + if (destination == null) { + throw new JMSBindingException("JMS Destination " + jmsBinding.getDestinationName() + + " not found but create mode of \"" + + qCreateMode + + "\" while registering service " + + service.getName() + + " listener"); + } + } + + // Make sure we ended up with a queue + if (destination == null) { + throw new JMSBindingException("JMS Destination " + jmsBinding.getDestinationName() + + " not found with create mode of \"" + + qCreateMode + + "\" while registering service " + + service.getName() + + " listener"); + } + + return destination; + } +} |