com.fr.third.jgroups.util

类 TimeScheduler3

java.lang.Object

com.fr.third.jgroups.util.TimeScheduler3

所有已实现的接口:

TimeScheduler, java.lang.Runnable

public class TimeScheduler3
extends java.lang.Object
implements TimeScheduler, java.lang.Runnable

Implementation of TimeScheduler. Based on the TimeScheduler2 implementation with various fixes and enhancements. Uses a DelayQueue to order tasks according to execution times

从以下版本开始:

3.3

作者:

Bela Ban

嵌套类概要

嵌套类

限定符和类型	类和说明
protected class	TimeScheduler3.RecurringTask Tasks which runs more than once, either dynamic, fixed-rate or fixed-delay, until cancelled
protected static class	TimeScheduler3.Task
protected static class	TimeScheduler3.TaskType

字段概要

字段

限定符和类型	字段和说明
protected static Log	log
protected java.util.concurrent.ThreadPoolExecutor	pool Thread pool used to execute the tasks
protected java.util.concurrent.BlockingQueue<TimeScheduler3.Task>	queue DelayQueue with tasks being sorted according to execution times (next execution first)
protected java.lang.Thread	runner Thread which removes tasks ready to be executed from the queue and submits them to the pool for execution
protected ThreadFactory	timer_thread_factory

构造器概要

构造器

构造器和说明
TimeScheduler3() Create a scheduler that executes tasks in dynamically adjustable intervals
TimeScheduler3(ThreadFactory factory, int min_threads, int max_threads, long keep_alive_time, int max_queue_size, java.lang.String rejection_policy)

方法概要

方法

限定符和类型	方法和说明
protected TimeScheduler3.Task	add(TimeScheduler3.Task task)
protected java.util.concurrent.Future<?>	doSchedule(TimeScheduler3.Task task, long initial_delay)
java.lang.String	dumpTimerTasks() Returns a list of tasks currently waiting for execution.
void	execute(java.lang.Runnable task) Executes command with zero required delay.
int	getCurrentThreads() Returns the current threads in the pool, or -1 if not applicable
long	getKeepAliveTime() Returns the keep alive time (in ms) of the thread pool, or -1 if not applicable
int	getMaxThreads() Returns the configured max threads, or -1 if not applicable
int	getMinThreads() Returns the configured core threads, or -1 if not applicable
int	getQueueSize()
protected boolean	isRunning()
boolean	isShutdown() Returns true if stop() has been called, false otherwise
void	run()
java.util.concurrent.Future<?>	schedule(java.lang.Runnable work, long initial_delay, java.util.concurrent.TimeUnit unit) Creates and executes a one-shot action that becomes enabled after the given delay.
java.util.concurrent.Future<?>	scheduleAtFixedRate(java.lang.Runnable work, long initial_delay, long delay, java.util.concurrent.TimeUnit unit) Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is executions will commence after initialDelay then initialDelay+period, then initialDelay + 2 * period, and so on.
protected java.util.concurrent.Future<?>	scheduleRecurring(java.lang.Runnable work, TimeScheduler3.TaskType type, long initial_delay, long delay, java.util.concurrent.TimeUnit unit)
java.util.concurrent.Future<?>	scheduleWithDynamicInterval(TimeScheduler.Task work) Schedule a task for execution at varying intervals.
java.util.concurrent.Future<?>	scheduleWithFixedDelay(java.lang.Runnable work, long initial_delay, long delay, java.util.concurrent.TimeUnit unit) Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given delay between the termination of one execution and the commencement of the next.
void	setKeepAliveTime(long time) Sets the keep alive time (in ms) of the thread pool.
void	setMaxThreads(int size) Sets the max pool size.
void	setMinThreads(int size) Sets the core pool size.
void	setThreadFactory(ThreadFactory f)
int	size() Returns the number of tasks currently in the queue.
protected void	start()
protected void	startRunner()
void	stop() Stops the timer, cancelling all tasks
protected void	stopRunner()
protected void	submitToPool(TimeScheduler3.Task entry)
java.lang.String	toString()

从类继承的方法 java.lang.Object

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

字段详细资料

pool

protected final java.util.concurrent.ThreadPoolExecutor pool

Thread pool used to execute the tasks

queue

protected final java.util.concurrent.BlockingQueue<TimeScheduler3.Task> queue

DelayQueue with tasks being sorted according to execution times (next execution first)

runner

protected volatile java.lang.Thread runner

Thread which removes tasks ready to be executed from the queue and submits them to the pool for execution

log

protected static final Log log

timer_thread_factory

protected ThreadFactory timer_thread_factory

构造器详细资料

TimeScheduler3

public TimeScheduler3()

Create a scheduler that executes tasks in dynamically adjustable intervals

TimeScheduler3

public TimeScheduler3(ThreadFactory factory,
              int min_threads,
              int max_threads,
              long keep_alive_time,
              int max_queue_size,
              java.lang.String rejection_policy)

方法详细资料

setThreadFactory

public void setThreadFactory(ThreadFactory f)

指定者:

setThreadFactory 在接口中 TimeScheduler

getMinThreads

public int getMinThreads()

从接口复制的说明: TimeScheduler

Returns the configured core threads, or -1 if not applicable

指定者:

getMinThreads 在接口中 TimeScheduler

返回:

setMinThreads

public void setMinThreads(int size)

从接口复制的说明: TimeScheduler

Sets the core pool size. Can be ignored if not applicable

指定者:

setMinThreads 在接口中 TimeScheduler

getMaxThreads

public int getMaxThreads()

从接口复制的说明: TimeScheduler

Returns the configured max threads, or -1 if not applicable

指定者:

getMaxThreads 在接口中 TimeScheduler

返回:

setMaxThreads

public void setMaxThreads(int size)

从接口复制的说明: TimeScheduler

Sets the max pool size. Can be ignored if not applicable

指定者:

setMaxThreads 在接口中 TimeScheduler

getKeepAliveTime

public long getKeepAliveTime()

从接口复制的说明: TimeScheduler

Returns the keep alive time (in ms) of the thread pool, or -1 if not applicable

指定者:

getKeepAliveTime 在接口中 TimeScheduler

setKeepAliveTime

public void setKeepAliveTime(long time)

从接口复制的说明: TimeScheduler

Sets the keep alive time (in ms) of the thread pool. Can be ignored if not applicable

指定者:

setKeepAliveTime 在接口中 TimeScheduler

getCurrentThreads

public int getCurrentThreads()

从接口复制的说明: TimeScheduler

Returns the current threads in the pool, or -1 if not applicable

指定者:

getCurrentThreads 在接口中 TimeScheduler

返回:

getQueueSize

public int getQueueSize()

size

public int size()

从接口复制的说明: TimeScheduler

Returns the number of tasks currently in the queue.

指定者:

size 在接口中 TimeScheduler

返回:

The number of tasks currently in the queue.

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.lang.Object

isShutdown

public boolean isShutdown()

从接口复制的说明: TimeScheduler

Returns true if stop() has been called, false otherwise

指定者:

isShutdown 在接口中 TimeScheduler

dumpTimerTasks

public java.lang.String dumpTimerTasks()

从接口复制的说明: TimeScheduler

Returns a list of tasks currently waiting for execution. If there are a lot of tasks, the returned string should probably only return the number of tasks rather than a full dump.

指定者:

dumpTimerTasks 在接口中 TimeScheduler

返回:

execute

public void execute(java.lang.Runnable task)

从接口复制的说明: TimeScheduler

Executes command with zero required delay. This has effect equivalent to schedule(command, 0, anyUnit).

指定者:

execute 在接口中 TimeScheduler

参数:

task - the task to execute

schedule

public java.util.concurrent.Future<?> schedule(java.lang.Runnable work,
                                      long initial_delay,
                                      java.util.concurrent.TimeUnit unit)

从接口复制的说明: TimeScheduler

Creates and executes a one-shot action that becomes enabled after the given delay.

指定者:

schedule 在接口中 TimeScheduler

参数:

work - the task to execute

initial_delay - the time from now to delay execution

unit - the time unit of the delay parameter

返回:

a ScheduledFuture representing pending completion of the task and whose get() method will return null upon completion

scheduleWithFixedDelay

public java.util.concurrent.Future<?> scheduleWithFixedDelay(java.lang.Runnable work,
                                                    long initial_delay,
                                                    long delay,
                                                    java.util.concurrent.TimeUnit unit)

从接口复制的说明: TimeScheduler

Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given delay between the termination of one execution and the commencement of the next. If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the executor.

指定者:

scheduleWithFixedDelay 在接口中 TimeScheduler

参数:

work - the task to execute

initial_delay - the time to delay first execution

delay - the delay between the termination of one execution and the commencement of the next

unit - the time unit of the initialDelay and delay parameters

返回:

a ScheduledFuture representing pending completion of the task, and whose get() method will throw an exception upon cancellation

scheduleAtFixedRate

public java.util.concurrent.Future<?> scheduleAtFixedRate(java.lang.Runnable work,
                                                 long initial_delay,
                                                 long delay,
                                                 java.util.concurrent.TimeUnit unit)

从接口复制的说明: TimeScheduler

Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is executions will commence after initialDelay then initialDelay+period, then initialDelay + 2 * period, and so on. If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the executor. If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.

指定者:

scheduleAtFixedRate 在接口中 TimeScheduler

参数:

work - the task to execute

initial_delay - the time to delay first execution

delay - the period between successive executions

unit - the time unit of the initialDelay and period parameters

返回:

a ScheduledFuture representing pending completion of the task, and whose get() method will throw an exception upon cancellation

scheduleWithDynamicInterval

public java.util.concurrent.Future<?> scheduleWithDynamicInterval(TimeScheduler.Task work)

Schedule a task for execution at varying intervals. After execution, the task will get rescheduled after TimeScheduler.Task.nextInterval() milliseconds. The task is never done until nextInterval() returns a value <= 0 or the task is cancelled.

Note that the task is rescheduled relative to the last time is actually executed. This is similar to scheduleWithFixedDelay(Runnable, long, long, java.util.concurrent.TimeUnit).

指定者:

scheduleWithDynamicInterval 在接口中 TimeScheduler

参数:

work - the task to execute

start

protected void start()

stop

public void stop()

Stops the timer, cancelling all tasks

指定者:

stop 在接口中 TimeScheduler

run

public void run()

指定者:

run 在接口中 java.lang.Runnable

scheduleRecurring

protected java.util.concurrent.Future<?> scheduleRecurring(java.lang.Runnable work,
                                               TimeScheduler3.TaskType type,
                                               long initial_delay,
                                               long delay,
                                               java.util.concurrent.TimeUnit unit)

doSchedule

protected java.util.concurrent.Future<?> doSchedule(TimeScheduler3.Task task,
                                        long initial_delay)

submitToPool

protected void submitToPool(TimeScheduler3.Task entry)

add

protected TimeScheduler3.Task add(TimeScheduler3.Task task)

isRunning

protected boolean isRunning()

startRunner

protected void startRunner()

stopRunner

protected void stopRunner()