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.Iterator;
30 import java.util.Set;
31 import java.util.concurrent.ThreadPoolExecutor;
32
33
41 public abstract class IteratorDispatcherDestination extends BaseDestination {
42
43 public IteratorDispatcherDestination(String name) {
44 super(name);
45 }
46
47 public IteratorDispatcherDestination(
48 String name, int workersCoreSize, int workersMaxSize) {
49
50 super(name, workersCoreSize, workersMaxSize);
51 }
52
53 public void register(MessageListener listener) {
54 listener = new InvokerMessageListener(listener);
55
56 _listeners.add(listener);
57 }
58
59 public void send(Message message) {
60 if (_listeners.size() == 0) {
61 if (_log.isDebugEnabled()) {
62 _log.debug("No listeners for destination " + getName());
63 }
64
65 return;
66 }
67
68 ThreadPoolExecutor threadPoolExecutor = getThreadPoolExecutor();
69
70 if (threadPoolExecutor.isShutdown()) {
71 throw new IllegalStateException(
72 "Destination " + getName() + " is shutdown and cannot " +
73 "receive more messages");
74 }
75
76 dispatch(_listeners.iterator(), message);
77 }
78
79 public boolean unregister(MessageListener listener) {
80 listener = new InvokerMessageListener(listener);
81
82 return _listeners.remove(listener);
83 }
84
85 public int getListenerCount() {
86 return _listeners.size();
87 }
88
89 protected abstract void dispatch(
90 Iterator<MessageListener> listenersItr, Message message);
91
92 private static Log _log =
93 LogFactoryUtil.getLog(IteratorDispatcherDestination.class);
94
95 private Set<MessageListener> _listeners =
96 new ConcurrentHashSet<MessageListener>();
97
98 }