com.gridsystems.nextgrid.api.pom
Class SequenceProcessImpl

java.lang.Object
  com.gridsystems.nextgrid.api.pom.PemHelper
      com.gridsystems.nextgrid.api.pom.ProcessImpl
          com.gridsystems.nextgrid.api.pom.ControlProcessImpl
              com.gridsystems.nextgrid.api.pom.SequenceProcessImpl

All Implemented Interfaces:

Enactable, java.io.Serializable, java.lang.Cloneable, nextgrid.api.pom.ControlProcess, nextgrid.api.pom.Process, nextgrid.api.pom.SequenceProcess

public class SequenceProcessImpl
extends ControlProcessImpl
implements nextgrid.api.pom.SequenceProcess

Control process that forces all its children to execute in a sequential basis. A child process must wait until its previous sibling finishes its execution to start its own.

Author:

Rodrigo Ruiz

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.gridsystems.nextgrid.api.pom.ProcessImpl

ProcessImpl.ValidationType

Field Summary

Fields inherited from class com.gridsystems.nextgrid.api.pom.ProcessImpl

DFA_INITIAL_STATE, ENACTOR_LOG

Constructor Summary

SequenceProcessImpl()
Creates a new instance.

Method Summary

protected void	doReset() Performs specific reset actions in each subclass.
protected void	doValidate(ProcessImpl.ValidationType when) Performs any validation action needed for the process implementation.
void	run(ProcessContext ctx) Performs the actual enaction of a process.
java.lang.String	toString()

Methods inherited from class com.gridsystems.nextgrid.api.pom.ControlProcessImpl

addChildren, addChildren, copy, discover, doEvaluate, findProcessById, getChildCount, getChildren, getChildren, getLocalVar, getLocalVars, isMemoizeActive, prioritise, removeChild, removeChild, resetChildren, setChildren, setChildren, setLocalVar, setMemoizeActive, trim

Methods inherited from class com.gridsystems.nextgrid.api.pom.ProcessImpl

attachListeners, enact, evaluate, evaluate, findRoot, getAttribute, getAttribute, getAttribute, getAttributes, getDescription, getId, getInput, getInputs, getInputs, getInputType, getName, getOutput, getOutputs, getOutputs, getOutputType, getParent, getState, getUsedInputNames, getUsedOutputNames, invalidate, isEvaluated, isLazy, isValidated, prioritise, putInput, putOutput, removeInput, removeOutput, reset, setAttribute, setAttribute, setDescription, setEvaluated, setId, setLazy, setName, setParent, setState, unuseInput, unuseOutput, useInput, useOutput, validate, waitForInputs

Methods inherited from class com.gridsystems.nextgrid.api.pom.PemHelper

addListener, fireDiscovererSelected, fireDiscoveryFailed, fireDiscoveryFinished, fireDiscoveryStarting, fireEvent, fireProcessEvaluated, fireProcessFailed, fireProcessFailed, fireProcessFinished, fireProcessFinished, fireProcessSelected, fireProcessStarted, removeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface nextgrid.api.pom.ControlProcess

addChildren, addChildren, getChildCount, getChildren, getChildren, getLocalVar, getLocalVars, isLazy, isMemoizeActive, removeChild, removeChild, setChildren, setChildren, setLazy, setLocalVar, setMemoizeActive, trim

Methods inherited from interface nextgrid.api.pom.Process

addListener, copy, discover, enact, evaluate, findProcessById, findRoot, getAttribute, getAttribute, getAttribute, getAttributes, getDescription, getId, getInput, getInputs, getInputType, getName, getOutput, getOutputs, getOutputType, getParent, getUsedInputNames, getUsedOutputNames, invalidate, isEvaluated, isValidated, prioritise, putInput, putOutput, removeInput, removeListener, removeOutput, reset, setAttribute, setAttribute, setDescription, setId, setName, setParent, unuseInput, unuseOutput, useInput, useOutput, validate

Constructor Detail

SequenceProcessImpl

public SequenceProcessImpl()

Creates a new instance.

Method Detail

doValidate

protected final void doValidate(ProcessImpl.ValidationType when)
                         throws nextgrid.api.pom.ProcessException

Performs any validation action needed for the process implementation.

Specified by:

doValidate in class ProcessImpl

Parameters:

when - Specifies when this validation is being invoked

Throws:

nextgrid.api.pom.ProcessException - If the validation fails

doReset

protected void doReset()

Performs specific reset actions in each subclass.

Specified by:

doReset in class ProcessImpl

run

public void run(ProcessContext ctx)
         throws nextgrid.api.pom.ProcessException,
                java.lang.InterruptedException

Performs the actual enaction of a process.

The instance must take into account possible errors, like service unavailability, or execution errors. As long as there are more "valid" candidates for the process, errors should not be propagated to the parent, and the next candidate should be selected and enacted.

A ProcessException as a result of this call means that this process is unable to correctly finish its execution, and that the parent must do something to fix the problem.

Specified by:

run in interface Enactable

Parameters:

ctx - A process context

Throws:

nextgrid.api.pom.ProcessException - If an unrecoverable local error occurs

java.lang.InterruptedException - If the thread is interrupted

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object