From 3a569a2f00bf172cddfd567149774ee808a2a242 Mon Sep 17 00:00:00 2001 From: nash Date: Wed, 30 Mar 2011 19:50:51 +0000 Subject: Create branch for 1.6.2 git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1087059 13f79535-47bb-0310-9956-ffa450edef68 --- .../sca/itest/EventProcessorServiceImpl.java | 197 +++++++++++++++++++++ 1 file changed, 197 insertions(+) create mode 100644 sca-java-1.x/branches/sca-java-1.6.2/itest/callback-separatethread/src/main/java/org/apache/tuscany/sca/itest/EventProcessorServiceImpl.java (limited to 'sca-java-1.x/branches/sca-java-1.6.2/itest/callback-separatethread/src/main/java/org/apache/tuscany/sca/itest/EventProcessorServiceImpl.java') diff --git a/sca-java-1.x/branches/sca-java-1.6.2/itest/callback-separatethread/src/main/java/org/apache/tuscany/sca/itest/EventProcessorServiceImpl.java b/sca-java-1.x/branches/sca-java-1.6.2/itest/callback-separatethread/src/main/java/org/apache/tuscany/sca/itest/EventProcessorServiceImpl.java new file mode 100644 index 0000000000..4d672b3a8b --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/itest/callback-separatethread/src/main/java/org/apache/tuscany/sca/itest/EventProcessorServiceImpl.java @@ -0,0 +1,197 @@ +/* + * 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.itest; + +import java.util.Map; +import java.util.Timer; +import java.util.TimerTask; +import java.util.UUID; +import java.util.concurrent.ConcurrentHashMap; + +import org.osoa.sca.CallableReference; +import org.osoa.sca.annotations.Callback; +import org.osoa.sca.annotations.Destroy; +import org.osoa.sca.annotations.Scope; +import org.osoa.sca.annotations.Service; + +/** + * Sample Event Processor Service Implementation + */ +@Service(EventProcessorService.class) +@Scope("CONVERSATION") +public class EventProcessorServiceImpl implements EventProcessorService { + + /** + * Reference to the call back + */ + @Callback + protected CallableReference clientCallback; + + /** + * This map contains the call backs for each of the registered Event names + */ + private final Map> eventListeners; + + /** + * The list of all Event Generators we create + */ + private final EventGenerator[] allEventGenerators; + + /** + * Constructor. Starts the Event Generators + */ + public EventProcessorServiceImpl() { + eventListeners = new ConcurrentHashMap>(); + + // We will simulate an Event generator + allEventGenerators = new EventGenerator[2]; + allEventGenerators[0] = new EventGenerator("ONE", 1); // Generate the SECOND event every second + allEventGenerators[1] = new EventGenerator("FIVE", 5); // Generate the FIVE event every 5 seconds + } + + /** + * Registers the client to receive notifications for the specified event + * + * @param aEventName The name of the Event to register + */ + public void registerForEvent(String aEventName) + { + // Register for the Event + eventListeners.put(aEventName, clientCallback); + + // Send the "register" started event to the client + receiveEvent(aEventName, "SameThread: Registered to receive notifications for " + aEventName); + } + + /** + * Unregisters the client so it no longer receives notifications for the specified event + * + * @param aEventName The name of the Event to unregister + */ + public void unregisterForEvent(String aEventName) + { + // Send the "register" started event to the client + receiveEvent(aEventName, "SameThread: Unregister from receiving notifications for " + aEventName); + + eventListeners.remove(aEventName); + } + + /** + * This method is called whenever the EventProcessorService receives an Event + * + * @param aEventName The name of the Event received + * @param aEventData The Event data + */ + private void receiveEvent(String aEventName, Object aEventData) + { + // Get the listener for the Event + final CallableReference callback = eventListeners.get(aEventName); + if (callback == null) + { + //System.out.println("No registered listeners for " + aEventName); + return; + } + + // Trigger the call back + // System.out.println("Notifying " + callback + " of event " + aEventName); + callback.getService().eventNotification(aEventName, aEventData); + // System.out.println("Done notify " + callback + " of event " + aEventName); + } + + /** + * Shuts down the Event Processor + */ + @Destroy + public void shutdown() + { + System.out.println("Shutting down the EventProcessor"); + + // Clear list of call back locations as we don't want to send any more notifications + eventListeners.clear(); + + // Stop the Event Generators + for (EventGenerator generator : allEventGenerators) + { + generator.stop(); + } + } + + /** + * Utility class for generating Events + */ + private class EventGenerator + { + /** + * The Timer we are using to generate the events + */ + private final Timer timer = new Timer(); + + /** + * Constructor + * + * @param aEventName The name of the Event to generate + * @param frequencyInSeconds How frequently we should generate the Events + */ + private EventGenerator(String aEventName, int frequencyInSeconds) + { + timer.schedule(new EventGeneratorTimerTask(aEventName), + frequencyInSeconds * 1000, frequencyInSeconds * 1000); + } + + /** + * Stop this Event Generator + */ + private void stop() + { + timer.cancel(); + } + + /** + * The TimerTask that is invoked by the Timer for the EventGenerator + */ + private class EventGeneratorTimerTask extends TimerTask + { + /** + * The name of the Event we should generate + */ + private final String eventName; + + /** + * Constructor + * + * @param aEventName The name of the Event we should generate + */ + private EventGeneratorTimerTask(String aEventName) + { + eventName = aEventName; + } + + /** + * Timer calls this method and it will generate an Event + */ + @Override + public void run() + { + // System.out.println("Generating new event " + eventName); + receiveEvent(eventName, "Separate Thread Notification: " + UUID.randomUUID().toString()); + } + } + } +} -- cgit v1.2.3