org.apache.commons.launcher

Class ParentListener


public class ParentListener
extends Thread

A class for detecting if the parent JVM that launched this process has terminated.

Author:
Patrick Luby

Constructor Summary

ParentListener(String path)
Validates and caches a lock file created by the parent JVM.

Method Summary

void
run()
Periodically check that the parent JVM has not terminated.

Constructor Details

ParentListener

public ParentListener(String path)
            throws IOException
Validates and caches a lock file created by the parent JVM.

Parameters:
path - the lock file that the parent JVM has an open FileOutputStream

Method Details

run

public void run()
Periodically check that the parent JVM has not terminated. On all platforms other than Windows, this method will check that System.in has not been closed. On Windows NT, 2000, and XP the lock file specified in the ParentListener(String) constructor is monitored as reading System.in will block the entire process on Windows machines that use some versions of Unix shells such as MKS, etc. No monitoring is done on Window 95, 98, and ME.


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