com.fr.third.jgroups.util

类 DefaultTimeScheduler

java.lang.Object

java.util.concurrent.AbstractExecutorService

java.util.concurrent.ThreadPoolExecutor

java.util.concurrent.ScheduledThreadPoolExecutor

com.fr.third.jgroups.util.DefaultTimeScheduler

所有已实现的接口:

TimeScheduler, java.util.concurrent.Executor, java.util.concurrent.ExecutorService, java.util.concurrent.ScheduledExecutorService

public class DefaultTimeScheduler
extends java.util.concurrent.ScheduledThreadPoolExecutor
implements TimeScheduler

Implementation of TimeScheduler by extending ScheduledThreadPoolExecutor to keep tasks sorted. Tasks will get executed in order of execution time (by using a DelayQueue internally.

作者:

Bela Ban

嵌套类概要

嵌套类

限定符和类型	类和说明
protected static class	DefaultTimeScheduler.RobustRunnable Class which catches exceptions in run() - https://jira.jboss.org/jira/browse/JGRP-1062
protected class	DefaultTimeScheduler.TaskWrapper<V>

从类继承的嵌套类/接口 java.util.concurrent.ThreadPoolExecutor

java.util.concurrent.ThreadPoolExecutor.AbortPolicy, java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardPolicy

从接口继承的嵌套类/接口 com.fr.third.jgroups.util.TimeScheduler

TimeScheduler.Task

字段概要

字段

限定符和类型	字段和说明
protected static Log	log

构造器概要

构造器

构造器和说明
DefaultTimeScheduler() Create a scheduler that executes tasks in dynamically adjustable intervals
DefaultTimeScheduler(int corePoolSize)
DefaultTimeScheduler(ThreadFactory factory)
DefaultTimeScheduler(ThreadFactory factory, int max_threads)

方法概要

方法

限定符和类型	方法和说明
java.lang.String	dumpTimerTasks() Returns a list of tasks currently waiting for execution.
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
java.util.concurrent.Future<?>	scheduleWithDynamicInterval(TimeScheduler.Task task) Schedule a task for execution at varying intervals.
java.util.concurrent.ScheduledFuture<?>	scheduleWithFixedDelay(java.lang.Runnable command, long initialDelay, 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 factory)
int	size() Answers the number of tasks currently in the queue.
void	stop() Stop the scheduler if it's running.
java.lang.String	toString()

从类继承的方法 java.util.concurrent.ScheduledThreadPoolExecutor

decorateTask, decorateTask, execute, getContinueExistingPeriodicTasksAfterShutdownPolicy, getExecuteExistingDelayedTasksAfterShutdownPolicy, getQueue, getRemoveOnCancelPolicy, schedule, schedule, scheduleAtFixedRate, setContinueExistingPeriodicTasksAfterShutdownPolicy, setExecuteExistingDelayedTasksAfterShutdownPolicy, setRemoveOnCancelPolicy, shutdown, shutdownNow, submit, submit, submit

从类继承的方法 java.util.concurrent.ThreadPoolExecutor

afterExecute, allowCoreThreadTimeOut, allowsCoreThreadTimeOut, awaitTermination, beforeExecute, finalize, getActiveCount, getCompletedTaskCount, getCorePoolSize, getKeepAliveTime, getLargestPoolSize, getMaximumPoolSize, getPoolSize, getRejectedExecutionHandler, getTaskCount, getThreadFactory, isShutdown, isTerminated, isTerminating, prestartAllCoreThreads, prestartCoreThread, purge, remove, setCorePoolSize, setKeepAliveTime, setMaximumPoolSize, setRejectedExecutionHandler, setThreadFactory, terminated

从类继承的方法 java.util.concurrent.AbstractExecutorService

invokeAll, invokeAll, invokeAny, invokeAny, newTaskFor, newTaskFor

从类继承的方法 java.lang.Object

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

从接口继承的方法 com.fr.third.jgroups.util.TimeScheduler

execute, isShutdown, schedule, scheduleAtFixedRate

从接口继承的方法 java.util.concurrent.ExecutorService

awaitTermination, invokeAll, invokeAll, invokeAny, invokeAny, isShutdown, isTerminated

字段详细资料

log

protected static final Log log

构造器详细资料

DefaultTimeScheduler

public DefaultTimeScheduler()

Create a scheduler that executes tasks in dynamically adjustable intervals

DefaultTimeScheduler

public DefaultTimeScheduler(ThreadFactory factory)

DefaultTimeScheduler

public DefaultTimeScheduler(ThreadFactory factory,
                    int max_threads)

DefaultTimeScheduler

public DefaultTimeScheduler(int corePoolSize)

方法详细资料

setThreadFactory

public void setThreadFactory(ThreadFactory factory)

指定者:

setThreadFactory 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:

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:

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

scheduleWithDynamicInterval

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

Schedule a task for execution at varying intervals. After execution, the task will get rescheduled after DefaultTimeScheduler.Task#nextInterval() milliseconds. The task is neve done until nextInterval() return a value <= 0 or the task is cancelled.

指定者:

scheduleWithDynamicInterval 在接口中 TimeScheduler

参数:

task - the task to execute

relative - scheduling scheme: true:
Task is rescheduled relative to the last time it actually started execution

false:
Task is scheduled relative to its last execution schedule. This has the effect that the time between two consecutive executions of the task remains the same.

Note that relative is always true; we always schedule the next execution relative to the last *actual* (not scheduled) execution

scheduleWithFixedDelay

public java.util.concurrent.ScheduledFuture<?> scheduleWithFixedDelay(java.lang.Runnable command,
                                                             long initialDelay,
                                                             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

指定者:

scheduleWithFixedDelay 在接口中 java.util.concurrent.ScheduledExecutorService

覆盖:

scheduleWithFixedDelay 在类中 java.util.concurrent.ScheduledThreadPoolExecutor

参数:

command - the task to execute

initialDelay - 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

size

public int size()

Answers 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.

stop

public void stop()

Stop the scheduler if it's running. Switch to stopped, if it's suspended. Clear the task queue, cancelling all un-executed tasks

指定者:

stop 在接口中 TimeScheduler

抛出:

java.lang.InterruptedException - if interrupted while waiting for thread to return

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.util.concurrent.ThreadPoolExecutor