gr.uoa.di.madgik.execution.engine
Class PlanExecutor

java.lang.Object
  java.lang.Thread
      gr.uoa.di.madgik.execution.engine.PlanExecutor

All Implemented Interfaces:

Runnable, Observer

public class PlanExecutor
extends Thread
implements Observer

This class manages the execution of an ExecutionPlan. Its role is to start in a background thread the execution of a plan and monitor its status until it is completed. Once the execution is completed, the instance removes it self from the list of PlanExecutors the engine references and cleans up any local files that are marked for cleanup in the plan.

Author:

gpapanikos

Nested Class Summary

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

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

PlanExecutor(ExecutionHandle Handle)
Instantiates a new plan executor.

Method Summary

void	Dispose() Unregisters itself from registered events, cleans up local files that are marked for cleanup in the plan and calls ExecutionHandle.Dispose()
ExecutionHandle	GetHandle() Gets the handle.
void	run()
void	update(Observable o, Object arg)

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

Constructor Detail

PlanExecutor

public PlanExecutor(ExecutionHandle Handle)

Instantiates a new plan executor.

Parameters:

Handle - the handle

Method Detail

GetHandle

public ExecutionHandle GetHandle()

Gets the handle.

Returns:

the execution handle

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

update

public void update(Observable o,
                   Object arg)

Specified by:

update in interface Observer

Dispose

public void Dispose()

Unregisters itself from registered events, cleans up local files that are marked for cleanup in the plan and calls ExecutionHandle.Dispose()