1
22
23 package com.liferay.portal.kernel.messaging;
24
25 import com.liferay.portal.kernel.log.Log;
26 import com.liferay.portal.kernel.log.LogFactoryUtil;
27 import com.liferay.portal.kernel.util.ConcurrentHashSet;
28
29 import java.util.Set;
30 import java.util.concurrent.ThreadPoolExecutor;
31
32
39 public abstract class ArrayDispatcherDestination extends BaseDestination {
40
41 public ArrayDispatcherDestination(String name) {
42 super(name);
43 }
44
45 public ArrayDispatcherDestination(
46 String name, int workersCoreSize, int workersMaxSize) {
47
48 super(name, workersCoreSize, workersMaxSize);
49 }
50
51 public int getListenerCount() {
52 return _listeners.size();
53 }
54
55 public void register(MessageListener listener) {
56 listener = new InvokerMessageListener(listener);
57
58 _listeners.add(listener);
59 }
60
61 public void send(Message message) {
62 if (_listeners.isEmpty()) {
63 if (_log.isDebugEnabled()) {
64 _log.debug("No listeners for destination " + getName());
65 }
66
67 return;
68 }
69
70 ThreadPoolExecutor threadPoolExecutor = getThreadPoolExecutor();
71
72 if (threadPoolExecutor.isShutdown()) {
73 throw new IllegalStateException(
74 "Destination " + getName() + " is shutdown and cannot " +
75 "receive more messages");
76 }
77
78 dispatch(_listeners, message);
79 }
80
81 public boolean unregister(MessageListener listener) {
82 listener = new InvokerMessageListener(listener);
83
84 return _listeners.remove(listener);
85 }
86
87 protected abstract void dispatch(
88 Set<MessageListener> listeners, Message message);
89
90 private static Log _log =
91 LogFactoryUtil.getLog(ArrayDispatcherDestination.class);
92
93 private Set<MessageListener> _listeners =
94 new ConcurrentHashSet<MessageListener>();
95
96 }