author | xuelei |
Sat, 24 Nov 2012 04:09:19 -0800 | |
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parent 10785 | 1d42311b6355 |
child 14665 | 8caa5add16ed |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.security.ssl; |
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import java.util.Enumeration; |
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import java.util.Vector; |
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import java.util.Locale; |
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import javax.net.ssl.SSLSession; |
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import javax.net.ssl.SSLSessionContext; |
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import sun.security.util.Cache; |
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final class SSLSessionContextImpl implements SSLSessionContext { |
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private Cache<SessionId, SSLSessionImpl> sessionCache; |
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// session cache, session id as key |
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private Cache<String, SSLSessionImpl> sessionHostPortCache; |
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// session cache, "host:port" as key |
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private int cacheLimit; // the max cache size |
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private int timeout; // timeout in seconds |
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private static final Debug debug = Debug.getInstance("ssl"); |
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// package private |
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SSLSessionContextImpl() { |
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cacheLimit = getDefaultCacheLimit(); // default cache size |
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timeout = 86400; // default, 24 hours |
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// use soft reference |
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sessionCache = Cache.newSoftMemoryCache(cacheLimit, timeout); |
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sessionHostPortCache = Cache.newSoftMemoryCache(cacheLimit, timeout); |
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} |
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/** |
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* Returns the <code>SSLSession</code> bound to the specified session id. |
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*/ |
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@Override |
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public SSLSession getSession(byte[] sessionId) { |
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if (sessionId == null) { |
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throw new NullPointerException("session id cannot be null"); |
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} |
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SSLSessionImpl sess = sessionCache.get(new SessionId(sessionId)); |
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if (!isTimedout(sess)) { |
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return sess; |
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} |
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return null; |
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} |
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/** |
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* Returns an enumeration of the active SSL sessions. |
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*/ |
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@Override |
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public Enumeration<byte[]> getIds() { |
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SessionCacheVisitor scVisitor = new SessionCacheVisitor(); |
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sessionCache.accept(scVisitor); |
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return scVisitor.getSessionIds(); |
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} |
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/** |
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* Sets the timeout limit for cached <code>SSLSession</code> objects |
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* |
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* Note that after reset the timeout, the cached session before |
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* should be timed within the shorter one of the old timeout and the |
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* new timeout. |
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*/ |
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@Override |
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public void setSessionTimeout(int seconds) |
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throws IllegalArgumentException { |
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if (seconds < 0) { |
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throw new IllegalArgumentException(); |
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} |
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if (timeout != seconds) { |
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sessionCache.setTimeout(seconds); |
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sessionHostPortCache.setTimeout(seconds); |
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timeout = seconds; |
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} |
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} |
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/** |
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* Gets the timeout limit for cached <code>SSLSession</code> objects |
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*/ |
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@Override |
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public int getSessionTimeout() { |
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return timeout; |
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} |
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/** |
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* Sets the size of the cache used for storing |
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* <code>SSLSession</code> objects. |
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*/ |
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@Override |
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public void setSessionCacheSize(int size) |
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throws IllegalArgumentException { |
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if (size < 0) |
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throw new IllegalArgumentException(); |
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if (cacheLimit != size) { |
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sessionCache.setCapacity(size); |
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sessionHostPortCache.setCapacity(size); |
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cacheLimit = size; |
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} |
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} |
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/** |
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* Gets the size of the cache used for storing |
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* <code>SSLSession</code> objects. |
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*/ |
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@Override |
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public int getSessionCacheSize() { |
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return cacheLimit; |
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} |
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// package-private method, used ONLY by ServerHandshaker |
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SSLSessionImpl get(byte[] id) { |
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return (SSLSessionImpl)getSession(id); |
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} |
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// package-private method, used ONLY by ClientHandshaker |
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SSLSessionImpl get(String hostname, int port) { |
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/* |
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* If no session caching info is available, we won't |
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* get one, so exit before doing a lookup. |
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*/ |
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if (hostname == null && port == -1) { |
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return null; |
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} |
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SSLSessionImpl sess = sessionHostPortCache.get(getKey(hostname, port)); |
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if (!isTimedout(sess)) { |
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return sess; |
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} |
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return null; |
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} |
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private String getKey(String hostname, int port) { |
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return (hostname + ":" + |
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String.valueOf(port)).toLowerCase(Locale.ENGLISH); |
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} |
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// cache a SSLSession |
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// |
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// In SunJSSE implementation, a session is created while getting a |
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// client hello or a server hello message, and cached while the |
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// handshaking finished. |
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// Here we time the session from the time it cached instead of the |
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// time it created, which is a little longer than the expected. So |
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// please do check isTimedout() while getting entry from the cache. |
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void put(SSLSessionImpl s) { |
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sessionCache.put(s.getSessionId(), s); |
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// If no hostname/port info is available, don't add this one. |
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if ((s.getPeerHost() != null) && (s.getPeerPort() != -1)) { |
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sessionHostPortCache.put( |
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getKey(s.getPeerHost(), s.getPeerPort()), s); |
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} |
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s.setContext(this); |
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} |
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// package-private method, remove a cached SSLSession |
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void remove(SessionId key) { |
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SSLSessionImpl s = sessionCache.get(key); |
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if (s != null) { |
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sessionCache.remove(key); |
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sessionHostPortCache.remove( |
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getKey(s.getPeerHost(), s.getPeerPort())); |
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} |
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} |
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private int getDefaultCacheLimit() { |
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int cacheLimit = 0; |
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try { |
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String s = java.security.AccessController.doPrivileged( |
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new java.security.PrivilegedAction<String>() { |
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@Override |
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public String run() { |
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return System.getProperty( |
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"javax.net.ssl.sessionCacheSize"); |
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} |
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}); |
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cacheLimit = (s != null) ? Integer.valueOf(s).intValue() : 0; |
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} catch (Exception e) { |
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} |
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return (cacheLimit > 0) ? cacheLimit : 0; |
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} |
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boolean isTimedout(SSLSession sess) { |
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if (timeout == 0) { |
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return false; |
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} |
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if ((sess != null) && ((sess.getCreationTime() + timeout * 1000L) |
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<= (System.currentTimeMillis()))) { |
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sess.invalidate(); |
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return true; |
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} |
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return false; |
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} |
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final class SessionCacheVisitor |
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implements Cache.CacheVisitor<SessionId, SSLSessionImpl> { |
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Vector<byte[]> ids = null; |
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// public void visit(java.util.Map<K,V> map) {} |
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@Override |
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public void visit(java.util.Map<SessionId, SSLSessionImpl> map) { |
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ids = new Vector<>(map.size()); |
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for (SessionId key : map.keySet()) { |
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SSLSessionImpl value = map.get(key); |
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if (!isTimedout(value)) { |
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ids.addElement(key.getId()); |
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} |
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} |
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} |
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|
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public Enumeration<byte[]> getSessionIds() { |
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return ids != null ? ids.elements() : |
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new Vector<byte[]>().elements(); |
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} |
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} |
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|
2 | 256 |
} |