verinec.util
Class AbstractProgramExec.StreamGobbler

java.lang.Object
  java.lang.Thread
      verinec.util.AbstractProgramExec.StreamGobbler

All Implemented Interfaces:

Runnable

Enclosing class:

AbstractProgramExec

public static class AbstractProgramExec.StreamGobbler
extends Thread

Class to read the input stream asynchonously. (This avoids blocking program execution on poorly designed system that have no proper output buffering.)

Helper methods for runtime.exec inspired by http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

Author:

David Buchmann, Michael Daconta

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

private InputStream	is
private OutputStream	os

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

AbstractProgramExec.StreamGobbler(InputStream is, OutputStream os)
Instantiate with a stream to be read and a stream to write output into.

Method Summary

void	run() Reads the input stream (program output) until the stream is finished and writes it to the output stream, then exits the thread.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

is

private InputStream is

os

private OutputStream os

Constructor Detail

AbstractProgramExec.StreamGobbler

AbstractProgramExec.StreamGobbler(InputStream is,
                                  OutputStream os)

Instantiate with a stream to be read and a stream to write output into. If os is null, the program output is simply discarded.

Parameters:

is - The input to this class (thus the output of the process).

os - The stream to take the program output or null to ignore output.

Method Detail

run

public void run()

Reads the input stream (program output) until the stream is finished and writes it to the output stream, then exits the thread. If there is an IOException during reading, the exception is ignored and the thread finishes.

Specified by:

run in interface Runnable

Overrides:

run in class Thread