gr.uoa.di.madgik.execution.event

Class ExecutionStateEvent

java.lang.Object

java.util.Observable

gr.uoa.di.madgik.execution.event.ExecutionStateEvent

Direct Known Subclasses:

ExecutionCancelStateEvent, ExecutionCompletedStateEvent, ExecutionExternalProgressReportStateEvent, ExecutionPauseStateEvent, ExecutionPerformanceReportStateEvent, ExecutionProgressReportStateEvent, ExecutionResumeStateEvent, ExecutionStartedStateEvent

public abstract class ExecutionStateEvent
extends Observable

Base class for every object that can be used to be registered by an Observer or send as Event. Event handling must follow well known guidelines. The most important of all as it could have a dramatic effect on the framework usage is the processing of a caught event. When an event is caught the processing to be performed should be kept minimal.

Author:

gpapanikos

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ExecutionStateEvent.EventName The typed name of event

Constructor Summary

Constructors

Constructor and Description
ExecutionStateEvent()

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	Decode(byte[] buf) Decode.
abstract byte[]	Encode() Encode.
abstract long	GetEmitTimestamp() Gets the timestamp the event was emitted.
abstract ExecutionStateEvent.EventName	GetEventName() Gets the event name.
void	SetChanged() Sets that the event is carrying updated information.

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecutionStateEvent

public ExecutionStateEvent()

Method Detail

SetChanged

public void SetChanged()

Sets that the event is carrying updated information.

GetEventName

public abstract ExecutionStateEvent.EventName GetEventName()

Gets the event name.

Returns:

the event name

GetEmitTimestamp

public abstract long GetEmitTimestamp()

Gets the timestamp the event was emitted.

Returns:

the long

Encode

public abstract byte[] Encode()
                       throws ExecutionSerializationException

Encode.

Returns:

the byte array containing the encoded event

Throws:

ExecutionSerializationException - A serialization error occurred

Decode

public abstract void Decode(byte[] buf)
                     throws ExecutionSerializationException

Decode.

Parameters:

buf - the byte array containing the encoded event as serialized by Encode()

Throws:

ExecutionSerializationException - A serialization error occurred