Package adams.flow.standalone

Class QueueEvent

java.lang.Object

adams.core.logging.LoggingObject

adams.core.logging.CustomLoggingLevelObject

adams.core.option.AbstractOptionHandler

adams.flow.core.AbstractActor

adams.flow.standalone.AbstractStandalone

adams.flow.standalone.QueueEvent

All Implemented Interfaces:

AdditionalInformationHandler, CleanUpHandler, Destroyable, GlobalInfoSupporter, LoggingLevelHandler, LoggingSupporter, OptionHandler, QuickInfoSupporter, ShallowCopySupporter<Actor>, SizeOfHandler, Stoppable, StoppableWithFeedback, VariablesInspectionHandler, VariableChangeListener, Actor, ActorHandler, DaemonEvent, ErrorHandler, Event, Flushable, MutableActorHandler, Serializable, Comparable

public class QueueEvent
extends AbstractStandalone
implements MutableActorHandler, DaemonEvent

Executes its sub-flow after a predefined number of milli-seconds.

-logging-level <OFF|SEVERE|WARNING|INFO|CONFIG|FINE|FINER|FINEST> (property: loggingLevel)
    The logging level for outputting errors and debugging output.
    default: WARNING
 

-name <java.lang.String> (property: name)
    The name of the actor.
    default: QueueEvent
 

-annotation <adams.core.base.BaseText> (property: annotations)
    The annotations to attach to this actor.
    default: 
 

-skip <boolean> (property: skip)
    If set to true, transformation is skipped and the input token is just forwarded 
    as it is.
    default: false
 

-stop-flow-on-error <boolean> (property: stopFlowOnError)
    If set to true, the flow gets stopped in case this actor encounters an error;
     useful for critical actors.
    default: false
 

-actor <adams.flow.core.Actor> [-actor ...] (property: actors)
    The actor to use for processing the queue element.
    default: 
 

-storage-name <adams.flow.control.StorageName> (property: storageName)
    The name of the queue in the internal storage.
    default: queue
 

-interval <int> (property: interval)
    The polling interval in milli-seconds.
    default: 50
    minimum: 1
 

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QueueEvent.QueueEventRunnable	Specialized runnable for the QueueEvent actor.

Field Summary

Fields

Modifier and Type	Field	Description
protected Sequence	m_Actors	for actors that get executed.
protected int	m_Interval	the poll interval in msec.
protected QueueEvent.QueueEventRunnable	m_Runnable	the runnable used for polling.
protected StorageName	m_StorageName	the name of the queue in the internal storage.

Fields inherited from class adams.flow.core.AbstractActor

m_Annotations, m_BackupState, m_DetectedObjectVariables, m_DetectedVariables, m_ErrorHandler, m_Executed, m_Executing, m_ExecutionListeningSupporter, m_FullName, m_LoggingPrefix, m_Name, m_Parent, m_ScopeHandler, m_Self, m_Silent, m_Skip, m_StopFlowOnError, m_StopMessage, m_Stopped, m_StorageHandler, m_VariablesUpdated

Fields inherited from class adams.core.option.AbstractOptionHandler

m_OptionManager

Fields inherited from class adams.core.logging.LoggingObject

m_Logger, m_LoggingIsEnabled, m_LoggingLevel

Fields inherited from interface adams.flow.core.Actor

FILE_EXTENSION, FILE_EXTENSION_GZ

Constructor Summary

Constructors

Constructor	Description
QueueEvent()

Method Summary

Modifier and Type	Method	Description
int	active()	Returns the number of non-skipped actors.
String	actorsTipText()	Returns the tip text for this property.
String	add(int index, Actor actor)	Inserts the actor at the given position.
String	add(Actor actor)	Inserts the actor at the end.
String	check()	Performs checks on the "sub-actors".
protected String	checkActors(Actor[] actors)	Checks the cron actors before they are set via the setActors method.
void	cleanUp()	Cleans up after the execution has finished.
void	defineOptions()	Adds options to the internal list of options.
protected String	doExecute()	Executes the flow item.
Actor	firstActive()	Returns the first non-skipped actor.
void	flushExecution()	Stops the processing of tokens without stopping the flow.
protected void	forceVariables(Variables value)	Updates the Variables instance in use.
Actor	get(int index)	Returns the actor at the given position.
ActorHandlerInfo	getActorHandlerInfo()	Returns some information about the actor handler, e.g., whether it can contain standalones and the actor execution.
Actor[]	getActors()	Returns the actors to execute on schedule.
protected Sequence	getInternalActors()	Returns the internal representation of the actors.
int	getInterval()	Returns the polling interval in milli-seconds.
String	getQuickInfo()	Returns a quick info about the actor, which will be displayed in the GUI.
StorageName	getStorageName()	Returns the name for the queue in the internal storage.
String	globalInfo()	Returns a string describing the object.
int	indexOf(String actor)	Returns the index of the actor.
protected void	initialize()	Initializes the members.
String	intervalTipText()	Returns the tip text for this property.
Actor	lastActive()	Returns the last non-skipped actor.
Actor	remove(int index)	Removes the actor at the given position and returns the removed object.
void	removeAll()	Removes all actors.
String	set(int index, Actor actor)	Sets the actor at the given position.
void	setActors(Actor[] value)	Sets the actors to execute on schedule.
void	setInterval(int value)	Sets the polling interval in seconds.
void	setLoggingLevel(LoggingLevel value)	Sets the logging level.
void	setStorageName(StorageName value)	Sets the name for the queue in the internal storage.
String	setUp()	Initializes the sub-actors for flow execution.
int	size()	Returns the size of the group.
void	stopExecution()	Stops the execution.
protected void	stopRunnable()	Stops the runnable if necessary, waits for it to finish.
String	storageNameTipText()	Returns the tip text for this property.
protected void	updateParent()	Updates the parent of all actors in this group.
void	wrapUp()	Cleans up after the execution has finished.

Methods inherited from class adams.flow.standalone.AbstractStandalone

preExecute

Methods inherited from class adams.flow.core.AbstractActor

annotationsTipText, backupState, canInspectOptions, canPerformSetUpCheck, compareTo, configureLogger, destroy, equals, execute, finalUpdateVariables, findVariables, findVariables, forCommandLine, forName, forName, getAdditionalInformation, getAnnotations, getDefaultName, getDetectedVariables, getErrorHandler, getFlowActors, getFlowExecutionListeningSupporter, getFullName, getName, getNextSibling, getParent, getParentComponent, getPreviousSibling, getRoot, getScopeHandler, getSilent, getSkip, getStopFlowOnError, getStopMessage, getStorageHandler, getVariables, handleError, handleException, hasErrorHandler, hasStopMessage, index, isBackedUp, isExecuted, isExecuting, isFinished, isHeadless, isStopped, nameTipText, performSetUpChecks, performVariableChecks, postExecute, pruneBackup, pruneBackup, reset, restoreState, setAnnotations, setErrorHandler, setName, setParent, setSilent, setSkip, setStopFlowOnError, setVariables, shallowCopy, shallowCopy, silentTipText, sizeOf, skipTipText, stopExecution, stopFlowOnErrorTipText, updateDetectedVariables, updatePrefix, updateVariables, variableChanged

Methods inherited from class adams.core.option.AbstractOptionHandler

cleanUpOptions, finishInit, getDefaultLoggingLevel, getOptionManager, loggingLevelTipText, newOptionManager, toCommandLine, toString

Methods inherited from class adams.core.logging.LoggingObject

getLogger, getLoggingLevel, initializeLogging, isLoggingEnabled

Methods inherited from class java.lang.Object

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

Methods inherited from interface adams.flow.core.Actor

compareTo, destroy, equals, execute, findVariables, getAnnotations, getDefaultName, getDetectedVariables, getErrorHandler, getFlowExecutionListeningSupporter, getFullName, getName, getNextSibling, getParent, getParentComponent, getPreviousSibling, getRoot, getScopeHandler, getSilent, getSkip, getStopFlowOnError, getStopMessage, getStorageHandler, getVariables, handleError, hasErrorHandler, hasStopMessage, index, isExecuted, isFinished, isHeadless, isStopped, setAnnotations, setErrorHandler, setName, setParent, setSilent, setSkip, setStopFlowOnError, setVariables, shallowCopy, shallowCopy, sizeOf, stopExecution, toCommandLine, variableChanged

Methods inherited from interface adams.core.AdditionalInformationHandler

getAdditionalInformation

Methods inherited from interface adams.core.logging.LoggingLevelHandler

getLoggingLevel

Methods inherited from interface adams.core.logging.LoggingSupporter

getLogger, isLoggingEnabled

Methods inherited from interface adams.core.option.OptionHandler

cleanUpOptions, getOptionManager

Methods inherited from interface adams.core.VariablesInspectionHandler

canInspectOptions

Field Detail

m_Actors

protected Sequence m_Actors

for actors that get executed.

m_StorageName

protected StorageName m_StorageName

the name of the queue in the internal storage.

m_Interval

protected int m_Interval

the poll interval in msec.

m_Runnable

protected QueueEvent.QueueEventRunnable m_Runnable

the runnable used for polling.

Constructor Detail

QueueEvent

public QueueEvent()

Method Detail

globalInfo

public String globalInfo()

Returns a string describing the object.

Specified by:

globalInfo in interface GlobalInfoSupporter

Specified by:

globalInfo in class AbstractOptionHandler

Returns:

a description suitable for displaying in the gui

defineOptions

public void defineOptions()

Adds options to the internal list of options.

Specified by:

defineOptions in interface OptionHandler

Overrides:

defineOptions in class AbstractActor

initialize

protected void initialize()

Initializes the members.

Overrides:

initialize in class AbstractActor

getQuickInfo

public String getQuickInfo()

Returns a quick info about the actor, which will be displayed in the GUI.

Specified by:

getQuickInfo in interface Actor

Specified by:

getQuickInfo in interface QuickInfoSupporter

Overrides:

getQuickInfo in class AbstractActor

Returns:

null if no info available, otherwise short string

setLoggingLevel

public void setLoggingLevel(LoggingLevel value)

Sets the logging level.

Specified by:

setLoggingLevel in interface LoggingLevelHandler

Overrides:

setLoggingLevel in class AbstractOptionHandler

Parameters:

value - the level

getInternalActors

protected Sequence getInternalActors()

Returns the internal representation of the actors.

Returns:

the actors

checkActors

protected String checkActors(Actor[] actors)

Checks the cron actors before they are set via the setActors method. Returns an error message if the actors are not acceptable, null otherwise.

Default implementation always returns null.

Parameters:

actors - the actors to check

Returns:

null if accepted, otherwise error message

updateParent

protected void updateParent()

Updates the parent of all actors in this group.

setActors

public void setActors(Actor[] value)

Sets the actors to execute on schedule.

Parameters:

value - the actors

getActors

public Actor[] getActors()

Returns the actors to execute on schedule.

Returns:

the actors

actorsTipText

public String actorsTipText()

Returns the tip text for this property.

Returns:

tip text for this property suitable for displaying in the GUI or for listing the options.

setStorageName

public void setStorageName(StorageName value)

Sets the name for the queue in the internal storage.

Parameters:

value - the name

getStorageName

public StorageName getStorageName()

Returns the name for the queue in the internal storage.

Returns:

the name

storageNameTipText

public String storageNameTipText()

Returns the tip text for this property.

Returns:

tip text for this property suitable for displaying in the GUI or for listing the options.

setInterval

public void setInterval(int value)

Sets the polling interval in seconds.

Parameters:

value - the interval

getInterval

public int getInterval()

Returns the polling interval in milli-seconds.

Returns:

the interval

intervalTipText

public String intervalTipText()

Returns the tip text for this property.

Returns:

tip text for this property suitable for displaying in the GUI or for listing the options.

size

public int size()

Returns the size of the group.

Specified by:

size in interface ActorHandler

Returns:

always 1

get

public Actor get(int index)

Returns the actor at the given position.

Specified by:

get in interface ActorHandler

Parameters:

index - the position

Returns:

the actor

set

public String set(int index,
                  Actor actor)

Sets the actor at the given position.

Specified by:

set in interface ActorHandler

Parameters:

index - the position

actor - the actor to set at this position

Returns:

null if successful, otherwise error message

indexOf

public int indexOf(String actor)

Returns the index of the actor.

Specified by:

indexOf in interface ActorHandler

Parameters:

actor - the name of the actor to look for

Returns:

the index of -1 if not found

add

public String add(Actor actor)

Inserts the actor at the end.

Specified by:

add in interface MutableActorHandler

Parameters:

actor - the actor to insert

Returns:

null if successful, otherwise error message

add

public String add(int index,
                  Actor actor)

Inserts the actor at the given position.

Specified by:

add in interface MutableActorHandler

Parameters:

index - the position

actor - the actor to insert

Returns:

null if successful, otherwise error message

remove

public Actor remove(int index)

Removes the actor at the given position and returns the removed object.

Specified by:

remove in interface MutableActorHandler

Parameters:

index - the position

Returns:

the removed actor

removeAll

public void removeAll()

Removes all actors.

Specified by:

removeAll in interface MutableActorHandler

getActorHandlerInfo

public ActorHandlerInfo getActorHandlerInfo()

Returns some information about the actor handler, e.g., whether it can contain standalones and the actor execution.

Specified by:

getActorHandlerInfo in interface ActorHandler

Returns:

the info

active

public int active()

Returns the number of non-skipped actors.

Returns:

the 'active' actors

firstActive

public Actor firstActive()

Returns the first non-skipped actor.

Specified by:

firstActive in interface ActorHandler

Returns:

the first 'active' actor, null if none available

lastActive

public Actor lastActive()

Returns the last non-skipped actor.

Specified by:

lastActive in interface ActorHandler

Returns:

the last 'active' actor, null if none available

check

public String check()

Performs checks on the "sub-actors".

Specified by:

check in interface ActorHandler

Returns:

null if everything OK, otherwise error message

forceVariables

protected void forceVariables(Variables value)

Updates the Variables instance in use.

Use with caution!

Overrides:

forceVariables in class AbstractActor

Parameters:

value - the instance to use

setUp

public String setUp()

Initializes the sub-actors for flow execution.

Specified by:

setUp in interface Actor

Overrides:

setUp in class AbstractActor

Returns:

null if everything is fine, otherwise error message

See Also:

AbstractActor.reset()

doExecute

protected String doExecute()

Executes the flow item.

Specified by:

doExecute in class AbstractActor

Returns:

null if everything is fine, otherwise error message

stopRunnable

protected void stopRunnable()

Stops the runnable if necessary, waits for it to finish.

flushExecution

public void flushExecution()

Stops the processing of tokens without stopping the flow.

Specified by:

flushExecution in interface ActorHandler

Specified by:

flushExecution in interface Flushable

stopExecution

public void stopExecution()

Stops the execution.

Specified by:

stopExecution in interface Actor

Specified by:

stopExecution in interface Stoppable

Overrides:

stopExecution in class AbstractActor

wrapUp

public void wrapUp()

Cleans up after the execution has finished. Graphical output is left untouched.

Specified by:

wrapUp in interface Actor

Overrides:

wrapUp in class AbstractActor

cleanUp

public void cleanUp()

Cleans up after the execution has finished. Also removes graphical components.

Specified by:

cleanUp in interface Actor

Specified by:

cleanUp in interface CleanUpHandler

Overrides:

cleanUp in class AbstractActor