/*
* @(#)ProcessMonitorThread.java 1.10 03/12/19
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
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();
}
}
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