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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/CORBA/SocketRepository.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/CORBA/SocketRepository.java | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/CORBA/SocketRepository.java b/gcc-4.4.3/libjava/classpath/gnu/CORBA/SocketRepository.java new file mode 100644 index 000000000..5d4a5099c --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/CORBA/SocketRepository.java @@ -0,0 +1,148 @@ +/* SocketRepository.java -- + Copyright (C) 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.CORBA; + +import java.net.Socket; +import java.net.SocketException; +import java.util.HashMap; +import java.util.Iterator; +import java.util.Map; + +/** + * This class caches the opened sockets that are reused during the + * frequent calls. Otherwise, some CORBA applications may spend + * up to 90 % of the working time just for closing and opening the sockets. + * + * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) + */ +public class SocketRepository +{ + /** + * The socket map. + */ + private static HashMap sockets = new HashMap(); + + /** + * Put a socket. This method also discards all not reusable sockets from + * the map. + * + * @param key as socket key. + * + * @param s a socket. + */ + public static void put_socket(Object key, Socket s) + { + synchronized (sockets) + { + sockets.put(key, s); + gc(); + } + } + + /** + * Removes all non reusable sockets. As it is private, + * we know we call from the synchronized code already. + */ + private static void gc() + { + Iterator iter = sockets.entrySet().iterator(); + + Map.Entry e; + Socket sx; + + while (iter.hasNext()) + { + e = (Map.Entry) iter.next(); + sx = (Socket) e.getValue(); + + if (not_reusable(sx)) + iter.remove(); + } + } + + /** + * Return true if the socket is no longer reusable. + */ + static boolean not_reusable(Socket s) + { + return (s.isClosed() || !s.isBound() || !s.isConnected() || + s.isInputShutdown() || s.isOutputShutdown()); + } + + /** + * Get a socket. + * + * @param key a socket key. + * + * @return an opened socket for reuse, null if no such available or it is + * closed, its input or output has been shutown or otherwise the socket is not + * reuseable. + */ + public static Socket get_socket(Object key) + { + synchronized (sockets) + { + Socket s = (Socket) sockets.get(key); + if (s == null) + return null; + + // Ensure that the socket is fully reusable. + else if (not_reusable(s)) + { + sockets.remove(key); + return null; + } + else + { + try + { + // Set one minute time out that will be changed later. + s.setSoTimeout(60 * 1000); + } + catch (SocketException e) + { + s = null; + } + + sockets.remove(key); + return s; + } + } + } +}
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