org.eclipse.smila.workermanager.keepalive

Class TaskKeepAlive

java.lang.Object

org.eclipse.smila.workermanager.keepalive.TaskKeepAlive

All Implemented Interfaces:

java.lang.Runnable

public class TaskKeepAlive
extends java.lang.Object
implements java.lang.Runnable

Helper class to store tasks and keep them alive.

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_SCHEDULE_MILLIS default schedule time in ms between checking of the delay queue.
static long	TIME_OUT_DEFAULT_SECONDS default timeout in s between keep alive calls.

Constructor Summary

Constructors

Constructor and Description
TaskKeepAlive(TaskManager taskManager) Constructor.
TaskKeepAlive(TaskManager taskManager, long timeout) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	addKeepAliveFailureListener(TaskKeepAliveListener keepAliveListener) Adds a TaskKeepAliveListener to this instance of TaskKeepAlive.
void	addKeepAliveFailureListeners(java.util.Collection<TaskKeepAliveListener> keepAliveListeners) Adds all given TaskKeepAliveListener to this instance of TaskKeepAlive.
void	addTask(Task task) Adds a task to be regularly kept alive.
java.util.Collection<TaskKeepAliveListener>	getKeepAliveFailureListeners()
void	removeKeepAliveFailureListener(TaskKeepAliveListener keepAliveListener) Removes a TaskKeepAliveListener from this instance of TaskKeepAlive.
void	removeTask(Task task) Remove a task from the keep alive mechanism.
void	run()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SCHEDULE_MILLIS

public static final long DEFAULT_SCHEDULE_MILLIS

default schedule time in ms between checking of the delay queue.

See Also:

Constant Field Values

TIME_OUT_DEFAULT_SECONDS

public static final long TIME_OUT_DEFAULT_SECONDS

default timeout in s between keep alive calls.

See Also:

Constant Field Values

Constructor Detail

TaskKeepAlive

public TaskKeepAlive(TaskManager taskManager)

Constructor.

Parameters:

taskManager - a reference to the task manager.

TaskKeepAlive

public TaskKeepAlive(TaskManager taskManager,
             long timeout)

Constructor.

Parameters:

taskManager - a reference to the task manager.

timeout - the timespan after which a task should be kept alive

Method Detail

removeTask

public void removeTask(Task task)

Remove a task from the keep alive mechanism.

Parameters:

task - the task to remove.

addTask

public void addTask(Task task)

Adds a task to be regularly kept alive.

Parameters:

task - the task to add.

run

public void run()

Specified by:

run in interface java.lang.Runnable

addKeepAliveFailureListener

public void addKeepAliveFailureListener(TaskKeepAliveListener keepAliveListener)

Adds a TaskKeepAliveListener to this instance of TaskKeepAlive.

Parameters:

keepAliveListener - the TaskKeepAliveListener to add.

addKeepAliveFailureListeners

public void addKeepAliveFailureListeners(java.util.Collection<TaskKeepAliveListener> keepAliveListeners)

Adds all given TaskKeepAliveListener to this instance of TaskKeepAlive.

Parameters:

keepAliveListeners - collection of TaskKeepAliveListener to add.

removeKeepAliveFailureListener

public void removeKeepAliveFailureListener(TaskKeepAliveListener keepAliveListener)

Removes a TaskKeepAliveListener from this instance of TaskKeepAlive.

Parameters:

keepAliveListener - the TaskKeepAliveListener to remove.

getKeepAliveFailureListeners

public java.util.Collection<TaskKeepAliveListener> getKeepAliveFailureListeners()

Returns:

all currently registered keep alive listeners.