001: /*
002: * Licensed to the Apache Software Foundation (ASF) under one
003: * or more contributor license agreements. See the NOTICE file
004: * distributed with this work for additional information
005: * regarding copyright ownership. The ASF licenses this file
006: * to you under the Apache License, Version 2.0 (the
007: * "License"); you may not use this file except in compliance
008: * with the License. You may obtain a copy of the License at
009: *
010: * http://www.apache.org/licenses/LICENSE-2.0
011: *
012: * Unless required by applicable law or agreed to in writing,
013: * software distributed under the License is distributed on an
014: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015: * KIND, either express or implied. See the License for the
016: * specific language governing permissions and limitations
017: * under the License.
018: *
019: */
020: package org.apache.mina.common;
021:
022: import java.net.SocketAddress;
023: import java.util.ArrayList;
024: import java.util.List;
025:
026: import org.apache.mina.util.ExpirationListener;
027: import org.apache.mina.util.ExpiringMap;
028:
029: /**
030: * An {@link IoSessionRecycler} with sessions that time out on inactivity.
031: *
032: * TODO Document me.
033: *
034: * @author The Apache MINA Project (dev@mina.apache.org)
035: * @version $Rev: 579942 $, $Date: 2007-09-27 02:32:13 -0600 (Thu, 27 Sep 2007) $
036: */
037: public class ExpiringSessionRecycler implements IoSessionRecycler {
038: private ExpiringMap<Object, IoSession> sessionMap;
039:
040: private ExpiringMap<Object, IoSession>.Expirer mapExpirer;
041:
042: public ExpiringSessionRecycler() {
043: this (ExpiringMap.DEFAULT_TIME_TO_LIVE);
044: }
045:
046: public ExpiringSessionRecycler(int timeToLive) {
047: this (timeToLive, ExpiringMap.DEFAULT_EXPIRATION_INTERVAL);
048: }
049:
050: public ExpiringSessionRecycler(int timeToLive,
051: int expirationInterval) {
052: sessionMap = new ExpiringMap<Object, IoSession>(timeToLive,
053: expirationInterval);
054: mapExpirer = sessionMap.getExpirer();
055: sessionMap
056: .addExpirationListener(new DefaultExpirationListener());
057: }
058:
059: public void put(IoSession session) {
060: mapExpirer.startExpiringIfNotStarted();
061:
062: Object key = generateKey(session);
063:
064: if (!sessionMap.containsKey(key)) {
065: sessionMap.put(key, session);
066: }
067: }
068:
069: public IoSession recycle(SocketAddress localAddress,
070: SocketAddress remoteAddress) {
071: return sessionMap.get(generateKey(localAddress, remoteAddress));
072: }
073:
074: public void remove(IoSession session) {
075: sessionMap.remove(generateKey(session));
076: }
077:
078: public void stopExpiring() {
079: mapExpirer.stopExpiring();
080: }
081:
082: public int getExpirationInterval() {
083: return sessionMap.getExpirationInterval();
084: }
085:
086: public int getTimeToLive() {
087: return sessionMap.getTimeToLive();
088: }
089:
090: public void setExpirationInterval(int expirationInterval) {
091: sessionMap.setExpirationInterval(expirationInterval);
092: }
093:
094: public void setTimeToLive(int timeToLive) {
095: sessionMap.setTimeToLive(timeToLive);
096: }
097:
098: private Object generateKey(IoSession session) {
099: return generateKey(session.getLocalAddress(), session
100: .getRemoteAddress());
101: }
102:
103: private Object generateKey(SocketAddress localAddress,
104: SocketAddress remoteAddress) {
105: List<SocketAddress> key = new ArrayList<SocketAddress>(2);
106: key.add(remoteAddress);
107: key.add(localAddress);
108: return key;
109: }
110:
111: private class DefaultExpirationListener implements
112: ExpirationListener<IoSession> {
113: public void expired(IoSession expiredSession) {
114: expiredSession.close();
115: }
116: }
117: }
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