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Diffstat (limited to 'sca-java-1.x/tags/1.6-TUSCANY-3909/host-jms-asf/src/main/java/org/apache/tuscany/sca/host/jms/asf/ASFListener.java')
| -rw-r--r-- | sca-java-1.x/tags/1.6-TUSCANY-3909/host-jms-asf/src/main/java/org/apache/tuscany/sca/host/jms/asf/ASFListener.java | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6-TUSCANY-3909/host-jms-asf/src/main/java/org/apache/tuscany/sca/host/jms/asf/ASFListener.java b/sca-java-1.x/tags/1.6-TUSCANY-3909/host-jms-asf/src/main/java/org/apache/tuscany/sca/host/jms/asf/ASFListener.java new file mode 100644 index 0000000000..77c121bedc --- /dev/null +++ b/sca-java-1.x/tags/1.6-TUSCANY-3909/host-jms-asf/src/main/java/org/apache/tuscany/sca/host/jms/asf/ASFListener.java @@ -0,0 +1,236 @@ +/*
+ * 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.host.jms.asf;
+
+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 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.binding.jms.provider.JMSResourceFactory;
+import org.apache.tuscany.sca.binding.jms.provider.JMSResourceFactoryImpl;
+import org.apache.tuscany.sca.host.jms.JMSServiceListener;
+import org.apache.tuscany.sca.work.WorkScheduler;
+
+/**
+ * Implementation of the JMS service binding provider.
+ *
+ * @version $Rev: 721811 $ $Date: 2008-11-30 13:46:51 +0000 (Sun, 30 Nov 2008) $
+ */
+public class ASFListener implements JMSServiceListener {
+ private static final Logger logger = Logger.getLogger(ASFListener.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 ASFListener(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 {
+ registerListerner();
+ } catch (Exception 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 (!"Transport disposed.".equals(e.getMessage())) {
+ throw new JMSBindingException("Error stopping JMSServiceBinding", e);
+ }
+ }
+ }
+
+ private void registerListerner() throws NamingException, JMSException {
+
+ Session session = jmsResourceFactory.createSession();
+ 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()));
+ }
+
+ /**
+ * 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
+ 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 "
+ + 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");
+ }
+
+ 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);
+ }
+ }
+
+}
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