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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/rmi/server/ConnectionRunnerPool.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/rmi/server/ConnectionRunnerPool.java')
-rw-r--r-- | libjava/classpath/gnu/java/rmi/server/ConnectionRunnerPool.java | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/rmi/server/ConnectionRunnerPool.java b/libjava/classpath/gnu/java/rmi/server/ConnectionRunnerPool.java new file mode 100644 index 000000000..86660fea7 --- /dev/null +++ b/libjava/classpath/gnu/java/rmi/server/ConnectionRunnerPool.java @@ -0,0 +1,156 @@ +/* gnu.java.rmi.server.ConnectionRunnerPool + Copyright (C) 2002, 2004, 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.java.rmi.server; + +import java.util.ArrayList; +import java.util.Arrays; + +//Should I generalize this class? + +class ConnectionRunnerPool +{ + + public static + class ConnectionRunner extends Thread{ + private UnicastConnection conn; + private volatile boolean exiting = false; + + public ConnectionRunner(ThreadGroup group, String id){ + super(group, id); + } + + public synchronized void run(){ + while(!exiting){ + if(conn == null) + try{ + wait(); + }catch(InterruptedException e){ + continue; + } + else{ + conn.run(); + conn = null; + synchronized(ConnectionRunnerPool.class){ + freelist.add(this); + if(freelist.size() == 1) + ConnectionRunnerPool.class.notifyAll(); + } + } + } + } + + public synchronized void dispatch(UnicastConnection conn){ + this.conn = conn; + notify(); + } + + void exit(){ + exiting = true; + if(conn != null) + try{ + join(500); + }catch(InterruptedException e){} + interrupt(); + } + + } + + // Should this value equal to number of CPU? + private static int size = 5; + private static int max_size = 10; + + // Package-private to avoid a trampoline. + static ArrayList freelist; + + private static ThreadGroup group = new ThreadGroup("pool"); + + static { + ConnectionRunner[] pools = new ConnectionRunner[size]; + for(int i = 0; i < pools.length; i++){ + pools[i] = new ConnectionRunner(group, Integer.toString(i)); + pools[i].setContextClassLoader(Thread.currentThread().getContextClassLoader()); + pools[i].start(); + } + freelist = new ArrayList(Arrays.asList(pools)); + } + + public static void setSize(int size_){ + size = size_; + } + + public static void setMaxSize(int size){ + max_size = size; + } + + private static synchronized ConnectionRunner getConnectionRunner() + { + if(freelist.size() == 0){ + if(size < max_size){ + ++size; + ConnectionRunner a = new ConnectionRunner(group, Integer.toString(size)); + a.start(); + freelist.add(a); + }else + while(freelist.size() == 0) + try{ + ConnectionRunnerPool.class.wait(); + }catch(InterruptedException e){} + } + + // always let the first in pool most busy or other scheduling plan?? + ConnectionRunner a = (ConnectionRunner)freelist.get(0); + freelist.remove(a); + return a; + } + + public static void dispatchConnection(UnicastConnection conn) + { + ConnectionRunner r = getConnectionRunner(); + r.dispatch(conn); + } + + public static void exit() + { + Thread[] list = new Thread[group.activeCount()]; + group.enumerate(list); + for(int i = 0; i < list.length; i++) + ((ConnectionRunner)list[i]).exit(); + } + +} |