| /* |
| * Copyright (c) 2001, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.corba.se.impl.activation; |
| |
| import java.util.*; |
| import com.sun.corba.se.impl.orbutil.ORBConstants; |
| |
| /** ProcessMonitorThread is started when ServerManager is instantiated. The |
| * thread wakes up every minute (This can be changed by setting sleepTime) and |
| * makes sure that all the processes (Servers) registered with the ServerTool |
| * are healthy. If not the state in ServerTableEntry will be changed to |
| * De-Activated. |
| * Note: This thread can be killed from the main thread by calling |
| * interrupThread() |
| */ |
| public class ProcessMonitorThread extends java.lang.Thread { |
| private HashMap serverTable; |
| private int sleepTime; |
| private static ProcessMonitorThread instance = null; |
| |
| private ProcessMonitorThread( HashMap ServerTable, int SleepTime ) { |
| serverTable = ServerTable; |
| sleepTime = SleepTime; |
| } |
| |
| public void run( ) { |
| while( true ) { |
| try { |
| // Sleep's for a specified time, before checking |
| // the Servers health. This will repeat as long as |
| // the ServerManager (ORBD) is up and running. |
| Thread.sleep( sleepTime ); |
| } catch( java.lang.InterruptedException e ) { |
| break; |
| } |
| Iterator serverList; |
| synchronized ( serverTable ) { |
| // Check each ServerTableEntry to make sure that they |
| // are in the right state. |
| serverList = serverTable.values().iterator(); |
| } |
| try { |
| checkServerHealth( serverList ); |
| } catch( ConcurrentModificationException e ) { |
| break; |
| } |
| } |
| } |
| |
| private void checkServerHealth( Iterator serverList ) { |
| if( serverList == null ) return; |
| while (serverList.hasNext( ) ) { |
| ServerTableEntry entry = (ServerTableEntry) serverList.next(); |
| entry.checkProcessHealth( ); |
| } |
| } |
| |
| static void start( HashMap serverTable ) { |
| int sleepTime = ORBConstants.DEFAULT_SERVER_POLLING_TIME; |
| |
| String pollingTime = System.getProperties().getProperty( |
| ORBConstants.SERVER_POLLING_TIME ); |
| |
| if ( pollingTime != null ) { |
| try { |
| sleepTime = Integer.parseInt( pollingTime ); |
| } catch (Exception e ) { |
| // Too late to complain, Just use the default |
| // sleepTime |
| } |
| } |
| |
| instance = new ProcessMonitorThread( serverTable, |
| sleepTime ); |
| instance.setDaemon( true ); |
| instance.start(); |
| } |
| |
| static void interruptThread( ) { |
| instance.interrupt(); |
| } |
| } |