org.apache.ode.utils

Class ProcessMutex

java.lang.Object

org.apache.ode.utils.ProcessMutex

public class ProcessMutex
extends java.lang.Object

An inter-process synchronization mechanism. This class uses a well known TCP port to synchronize multiple processes. The method of operation is simple: by opening a port, a process prevents other processes on the local machine from opening the same port.

Author:

Maciej Szefler ( m s z e f l e r @ g m a i l . c o m)

Constructor Summary

Constructors

Constructor and Description
ProcessMutex(int port) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	lock() Acquire the lock.
void	unlock() Release the lock

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProcessMutex

public ProcessMutex(int port)

Constructor.

Parameters:

port - synchronization TCP port

Method Detail

lock

public void lock()
          throws java.lang.InterruptedException

Acquire the lock. Will throw InterruptedException after timeout (15 seconds).

Throws:

java.lang.InterruptedException - in case of timeout

java.lang.IllegalStateException - in case lock is already acquired

unlock

public void unlock()

Release the lock

Throws:

java.lang.IllegalStateException - DOCUMENTME