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20 package org.apache.mina.core.session;
21
22 import java.util.Iterator;
23 import java.util.Set;
24
25 import org.apache.mina.core.future.CloseFuture;
26 import org.apache.mina.core.future.IoFuture;
27 import org.apache.mina.core.future.IoFutureListener;
28 import org.apache.mina.core.service.IoService;
29 import org.apache.mina.util.ConcurrentHashSet;
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40 public class IdleStatusChecker {
41
42
43 private final Set<AbstractIoSession> sessions =
44 new ConcurrentHashSet<AbstractIoSession>();
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51 private final NotifyingTask notifyingTask = new NotifyingTask();
52
53 private final IoFutureListener<IoFuture> sessionCloseListener =
54 new SessionCloseListener();
55
56 public IdleStatusChecker() {}
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61
62 public void addSession(AbstractIoSession session) {
63 sessions.add(session);
64 CloseFuture closeFuture = session.getCloseFuture();
65
66
67 closeFuture.addListener(sessionCloseListener);
68 }
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73
74 private void removeSession(AbstractIoSession session) {
75 sessions.remove(session);
76 }
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82 public NotifyingTask getNotifyingTask() {
83 return notifyingTask;
84 }
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89 public class NotifyingTask implements Runnable {
90 private volatile boolean cancelled;
91 private volatile Thread thread;
92
93
94 private NotifyingTask() {
95
96 }
97
98 public void run() {
99 thread = Thread.currentThread();
100 try {
101 while (!cancelled) {
102
103 long currentTime = System.currentTimeMillis();
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105 notifySessions(currentTime);
106
107 try {
108 Thread.sleep(1000);
109 } catch (InterruptedException e) {
110
111 }
112 }
113 } finally {
114 thread = null;
115 }
116 }
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121 public void cancel() {
122 cancelled = true;
123 Thread thread = this.thread;
124 if (thread != null) {
125 thread.interrupt();
126 }
127 }
128
129 private void notifySessions(long currentTime) {
130 Iterator<AbstractIoSession> it = sessions.iterator();
131 while (it.hasNext()) {
132 AbstractIoSession session = it.next();
133 if (session.isConnected()) {
134 AbstractIoSession.notifyIdleSession(session, currentTime);
135 }
136 }
137 }
138 }
139
140 private class SessionCloseListener implements IoFutureListener<IoFuture> {
141 public void operationComplete(IoFuture future) {
142 removeSession((AbstractIoSession) future.getSession());
143 }
144 }
145 }