| /* 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, new Integer(i).toString()); |
| 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, new Integer(size).toString()); |
| 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(); |
| } |
| |
| } |