Module org.snmp4j

Package org.snmp4j.util

Class TaskScheduler

java.lang.Object

org.snmp4j.util.TaskScheduler

All Implemented Interfaces:

Runnable

public class TaskScheduler
extends Object
implements Runnable

The TaskScheduler uses a ThreadPool to recurrent execute SchedulerTasks.

Since:

1.6

Version:

1.6

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	DEFAULT_SCHEDULER_TIMEOUT
private LogAdapter	logger
protected long	schedulerTimeout
private boolean	stop
private LinkedList<SchedulerTask>	tasks
private ThreadPool	threadPool

Constructor Summary

Constructors

Constructor	Description
TaskScheduler(ThreadPool threadPool)	Creates a TaskScheduler that uses the supplied ThreadPool to execute tasks.

Method Summary

Modifier and Type	Method	Description
void	addTask(SchedulerTask task)	Adds a task to the scheduler.
void	clear()	Removes all tasks.
boolean	isStop()	Checks if the scheduler is (to be) stopped.
boolean	removeTask(SchedulerTask task)	Removes a task from the scheduler.
void	run()	Runs the scheduler.
void	setStop(boolean stop)	Stops the schedulers run method.

Methods inherited from class java.lang.Object

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

Field Details

logger

private LogAdapter logger

DEFAULT_SCHEDULER_TIMEOUT

private static final long DEFAULT_SCHEDULER_TIMEOUT

See Also:

• Constant Field Values

tasks

private LinkedList<SchedulerTask> tasks

threadPool

private ThreadPool threadPool

stop

private boolean stop

schedulerTimeout

protected long schedulerTimeout

Constructor Details

TaskScheduler

public TaskScheduler(ThreadPool threadPool)

Creates a TaskScheduler that uses the supplied ThreadPool to execute tasks.

Parameters:

threadPool - a ThreadPool.

Method Details

addTask

public void addTask(SchedulerTask task)

Adds a task to the scheduler.

Parameters:

task - a SchedulerTask.

removeTask

public boolean removeTask(SchedulerTask task)

Removes a task from the scheduler.

Parameters:

task - the SchedulerTask to be removed from the scheduler

Returns:

true if the task could be removed.

clear

public void clear()

Removes all tasks.

run

public void run()

Runs the scheduler. While in this method tasks are scheduled on the internal thread pool. The scheduler tries to schedule task fairly.

Specified by:

run in interface Runnable

setStop

public void setStop(boolean stop)

Stops the schedulers run method.

Parameters:

stop - true to stop the scheduler.

isStop

public boolean isStop()

Checks if the scheduler is (to be) stopped.

Returns:

true if the scheduler has been stopped or is being stopped.