| /* |
| * 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.sample.comet; |
| |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.List; |
| import java.util.UUID; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.tuscany.sca.binding.comet.runtime.callback.CometCallback; |
| import org.apache.tuscany.sca.binding.comet.runtime.callback.Status; |
| import org.oasisopen.sca.ComponentContext; |
| import org.oasisopen.sca.annotation.Context; |
| import org.oasisopen.sca.annotation.Destroy; |
| import org.oasisopen.sca.annotation.Scope; |
| import org.oasisopen.sca.annotation.Service; |
| |
| import com.google.common.collect.HashMultimap; |
| import com.google.common.collect.Multimap; |
| import com.google.common.collect.Multimaps; |
| |
| @Service({ EventProcessorConsumerService.class, EventProcessorProducerService.class }) |
| @Scope("COMPOSITE") |
| public class EventProcessor implements EventProcessorConsumerService, EventProcessorProducerService { |
| |
| @Context |
| protected ComponentContext componentContext; |
| |
| private ConcurrentMap<String, CometCallback> clients = new ConcurrentHashMap<String, CometCallback>(); |
| private Multimap<String, String> eventListeners = Multimaps.synchronizedMultimap(HashMultimap |
| .<String, String> create()); |
| |
| @Override |
| public void onEvent(String eventName, String eventData) { |
| // System.out.println("EventProcessor: Received event " + eventName + |
| // "..."); |
| List<String> destinations = new ArrayList<String>(); |
| synchronized (eventListeners) { |
| destinations.addAll(eventListeners.get(eventName)); |
| } |
| Event event = new Event(); |
| event.setName(eventName); |
| event.setData(eventData); |
| for (String registrationId : destinations) { |
| CometCallback client = clients.get(registrationId); |
| if (client == null) { |
| // client has unregistered from this event |
| synchronized (eventListeners) { |
| eventListeners.remove(eventName, registrationId); |
| } |
| } else { |
| Status status = client.sendMessage(event); |
| if (status == Status.CLIENT_DISCONNECTED) { |
| unregister(registrationId); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void register(String eventName) { |
| String registrationId = UUID.randomUUID().toString(); |
| CometCallback callback = componentContext.getRequestContext().getCallback(); |
| clients.put(registrationId, callback); |
| synchronized (eventListeners) { |
| eventListeners.put(eventName, registrationId); |
| } |
| Event event = new Event(); |
| event.setId(registrationId); |
| event.setName(eventName); |
| event.setData(new Date().toString()); |
| callback.sendMessage(event); |
| } |
| |
| @Override |
| public void unregister(String registrationId) { |
| clients.remove(registrationId); |
| // unregistration from eventListeners done during onEvent |
| } |
| |
| @Destroy |
| public void shutdown() { |
| clients.clear(); |
| eventListeners.clear(); |
| clients = null; |
| eventListeners = null; |
| } |
| } |