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

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

TaskKeepAlive(TaskManager taskManager)
Constructor.

TaskKeepAlive(TaskManager taskManager, long timeout)
Constructor.

Method Summary

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.