juju.reattore.util
Class Spawner

java.lang.Object
  |
  +--juju.reattore.util.Spawner

All Implemented Interfaces:

java.lang.Runnable

public class Spawner

extends java.lang.Object

implements java.lang.Runnable

A native process wrapper that provides higher level functionality over Runtime.exec()

Constructor Summary

Spawner()

Method Summary

void	destroy() Kills the process if it is not yet finished.
int	exitValue() The exit code of the process, if present.
java.util.List	getOutput() The processes stdout and stderr, combined, as a list of strings.
boolean	isDone() Set if the process is finished.
void	run() Internal method.
void	setCommand(java.lang.String command) The Runtime.exec command to run.
void	setDir(java.lang.String dir) The working directory to start in.
void	spawn() Starts the process running in the background and waits for it to start.
void	waitDone() Waits for the process to terminate.

Methods inherited from class java.lang.Object

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

Constructor Detail

Spawner

public Spawner()

Method Detail

run

public void run()

Internal method.

Specified by:

run in interface java.lang.Runnable

setCommand

public void setCommand(java.lang.String command)

The Runtime.exec command to run.

Parameters:

command - The command.

setDir

public void setDir(java.lang.String dir)

The working directory to start in. null means unset.

Parameters:

dir - Working directory.

spawn

public void spawn()
           throws java.lang.Exception

Starts the process running in the background and waits for it to start.

Throws:

java.lang.Exception - on error.

waitDone

public void waitDone()
              throws java.lang.Exception

Waits for the process to terminate.

Throws:

java.lang.Exception - on error.

exitValue

public int exitValue()

The exit code of the process, if present. Not valid until the process completes.

Returns:

The exit value.

isDone

public boolean isDone()

Set if the process is finished.

Returns:

true if finished.

destroy

public void destroy()
             throws java.lang.Exception

Kills the process if it is not yet finished.

Throws:

java.lang.Exception - on error.

getOutput

public java.util.List getOutput()

The processes stdout and stderr, combined, as a list of strings. The controller calls notifyAll() when lines are added.

Returns:

The processes output.