org.syrup.functions
Class BShell

java.lang.Object
  java.lang.Thread
      org.syrup.functions.BShell

All Implemented Interfaces:

Function, java.lang.Runnable

public class BShell

extends java.lang.Thread

implements Function

Executes a shell command, provided by the first input, using a BlobServer. The second input provides the stdin. If the second input is not given the first (command) input is consumed. The first output maps to stdout and the second output to stderr. Only the second input and first output are put through a BlobServer. This makes the processing of big inputs and outputs possible without overloading the backing store implementation of Syrup.

Author:

Robbert van Dalen

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

BShell()

Method Summary

Result	execute(Context context) Generates a Result given a Task's Context.
void	run() Main processing method for the BShell object

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, 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

Constructor Detail

BShell

public BShell()

Method Detail

execute

public Result execute(Context context)

Description copied from interface: Function

Generates a Result given a Task's Context. Implementations should not throw Exceptions, retain Objects or any other resources after the calling Thread exits this method.

Specified by:

execute in interface Function

Parameters:

context - The Context from which the Function get its parameters.

Returns:

The Result after execution.

run

public void run()

Main processing method for the BShell object

Specified by:

run in interface java.lang.Runnable