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Diffstat (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/host/DefaultJMSServiceListener.java')
| -rw-r--r-- | sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/host/DefaultJMSServiceListener.java | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/host/DefaultJMSServiceListener.java b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/host/DefaultJMSServiceListener.java new file mode 100644 index 0000000000..94728699a2 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/host/DefaultJMSServiceListener.java @@ -0,0 +1,283 @@ +/* + * 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.host; + +import java.util.logging.Level; +import java.util.logging.Logger; + +import javax.jms.Destination; +import javax.jms.JMSException; +import javax.jms.Message; +import javax.jms.MessageConsumer; +import javax.jms.MessageListener; +import javax.jms.Queue; +import javax.jms.Session; +import javax.jms.Topic; +import javax.naming.NamingException; +import javax.resource.spi.ActivationSpec; + +import org.apache.tuscany.sca.binding.jms.JMSBinding; +import org.apache.tuscany.sca.binding.jms.JMSBindingConstants; +import org.apache.tuscany.sca.binding.jms.JMSBindingException; +import org.apache.tuscany.sca.binding.jms.provider.JMSResourceFactory; +import org.apache.tuscany.sca.work.WorkScheduler; + +/** + * Implementation of the JMS service binding provider. + * + * @version $Rev$ $Date$ + */ +public class DefaultJMSServiceListener implements JMSServiceListener { + private static final Logger logger = Logger.getLogger(DefaultJMSServiceListener.class.getName()); + + private MessageListener listener; + private String serviceName; + private boolean isCallbackService; + private JMSBinding jmsBinding; + private WorkScheduler workScheduler; + + private JMSResourceFactory jmsResourceFactory; + private MessageConsumer consumer; + private boolean running; + + private Destination destination; + + public DefaultJMSServiceListener(MessageListener listener, String serviceName, boolean isCallbackService, JMSBinding jmsBinding, WorkScheduler workScheduler, JMSResourceFactory rf) { + this.listener = listener; + this.serviceName = serviceName; + this.isCallbackService = isCallbackService; + this.jmsBinding = jmsBinding; + this.workScheduler = workScheduler; + this.jmsResourceFactory = rf; + } + + public void start() { + this.running = true; + + try { + registerListener(); + } catch (Exception e) { + if (e instanceof JMSBindingException) throw (JMSBindingException)e; + throw new JMSBindingException("Error starting JMSServiceBinding", e); + } + } + + public void stop() { + this.running = false; + try { + consumer.close(); + jmsResourceFactory.closeConnection(); + jmsResourceFactory.closeResponseConnection(); + } catch (Exception e) { + // if using an embedded broker then when shutting down Tuscany the broker may get closed + // before this stop method is called. I can't see how to detect that so for now just + // ignore the exception if the message is that the transport is already disposed + if ((e.getMessage() == null) || !e.getMessage().contains("disposed")) { + throw new JMSBindingException("Error stopping JMSServiceBinding", e); + } + } + } + + private void registerListener() throws NamingException, JMSException { + + Session session = jmsResourceFactory.createSession(); + lookupActivationSpec(); + destination = lookupDestinationQueue(); + if (destination == null) { + destination = session.createTemporaryQueue(); + } + + if (jmsBinding.getJMSSelector() != null) { + consumer = session.createConsumer(destination, jmsBinding.getJMSSelector()); + } else { + consumer = session.createConsumer(destination); + } + + try { + + consumer.setMessageListener(listener); + jmsResourceFactory.startConnection(); + + } catch (javax.jms.JMSException 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(); + } + } + }); + } + logger.log(Level.INFO, "JMS " + (isCallbackService ? "callback service" : "service") + + " '" + + serviceName + + "' listening on destination " + + ((destination instanceof Queue) ? ((Queue)destination).getQueueName() : ((Topic)destination).getTopicName())); + } + + // Stub code for ActivationSpec support that throws appropriate errors + private void lookupActivationSpec() { + if ( jmsBinding.getActivationSpecName() != null ) { + String createMode = jmsBinding.getActivationSpecCreate(); + if ( JMSBindingConstants.CREATE_ALWAYS.equals(createMode) ) { + ActivationSpec spec = jmsResourceFactory.lookupActivationSpec(jmsBinding.getActivationSpecName()); + if ( spec != null ) { + throw new JMSBindingException("ActivationSpec specifies create mode of \"always\" but resource already exists."); + } + throw new JMSBindingException("Can not create ActivationSpec"); + } else if ( JMSBindingConstants.CREATE_IF_NOT_EXIST.equals(createMode)) { + ActivationSpec spec = jmsResourceFactory.lookupActivationSpec(jmsBinding.getActivationSpecName()); + if ( spec == null ) { + throw new JMSBindingException("Can not create ActivationSpec"); + } + } else if ( JMSBindingConstants.CREATE_NEVER.equals(createMode)) { + ActivationSpec spec = jmsResourceFactory.lookupActivationSpec(jmsBinding.getActivationSpecName()); + if ( spec == null ) + throw new JMSBindingException("ActivationSpec specifies create mode of \"never\" but resource does not exist at jndiName " + jmsBinding.getActivationSpecName()); + + } + + + } + } + + /** + * 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 existence/non-existence is not + * compatible with the create mode specified on the binding + */ + private Destination lookupDestinationQueue() throws NamingException, JMSBindingException { + + if (isCallbackService && (jmsBinding.getDestinationName() == null)) { + // if its a callback service returning null indicates to use a temporary queue + return null; + } + + 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 " + + serviceName + + " 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 + // but don't create when using jms:jndi uri format + if (destination == null && !"jndi".equals(jmsBinding.getDestinationType())) { + 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 " + + serviceName + + " 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 " + + serviceName + + " listener"); + } + + // Make sure its the expected type (queue or topic) + String type = (destination instanceof Queue) ? JMSBindingConstants.DESTINATION_TYPE_QUEUE : JMSBindingConstants.DESTINATION_TYPE_TOPIC; + if ("jndi".equals(jmsBinding.getDestinationType())) { + jmsBinding.setDestinationType(type); + } else { + if (!type.equals(jmsBinding.getDestinationType())) { + throw new JMSBindingException("JMS Destination " + jmsBinding.getDestinationName() + + " expecting type of " + + jmsBinding.getDestinationType() + + " but found " + + type + + " while registering service " + + serviceName + + " listener"); + } + } + + return destination; + } + + + + public String getDestinationName() { + try { + if (destination instanceof Queue) { + return ((Queue)destination).getQueueName(); + } else if (destination instanceof Topic) { + return ((Topic)destination).getTopicName(); + } else { + return null; + } + } catch (JMSException e) { + throw new JMSBindingException(e); + } + } + +} |