Package org.eblocker.server.common.system

Class LoggingProcess

java.lang.Object

org.eblocker.server.common.system.LoggingProcess

Direct Known Subclasses:

LoggingProcessUnix

public abstract class LoggingProcess
extends Object

A wrapper for processes that should log their stout and stderr streams.

Field Summary

Fields

Modifier and Type	Field	Description
protected final String	name
protected Process	process

Constructor Summary

Constructors

Constructor	Description
LoggingProcess(String name, Executor executor)	Creates a process

Method Summary

Modifier and Type	Method	Description
int	exitValue()
abstract int	getPid()
boolean	isAlive()
String	pollStdout()	Retrieves next line of output, or returns null if there is none.
void	run(String[] args)
void	start(String[] args)	Starts a process with the given arguments
String	takeStdout()	Retrieves next line of output, waiting if necessary until output becomes available or returns null if process has quit.
int	waitFor()	Wait for the process to terminate.

Methods inherited from class java.lang.Object

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

Field Details

name

protected final String name

process

protected Process process

Constructor Details

LoggingProcess

public LoggingProcess(String name,
 Executor executor)

Creates a process

Parameters:

name - name to be shown at the start of each log line

Method Details

start

public void start(String[] args)
           throws IOException

Starts a process with the given arguments

Parameters:

args -

Throws:

IOException

run

public void run(String[] args)
         throws IOException,
InterruptedException

Throws:

IOException

InterruptedException

isAlive

public boolean isAlive()

waitFor

public int waitFor()
            throws InterruptedException

Wait for the process to terminate.

Returns:

the exit value of the process

Throws:

InterruptedException

getPid

public abstract int getPid()

exitValue

public int exitValue()

pollStdout

public String pollStdout()

Retrieves next line of output, or returns null if there is none.

takeStdout

public String takeStdout()
                  throws InterruptedException

Retrieves next line of output, waiting if necessary until output becomes available or returns null if process has quit.

Throws:

InterruptedException