类 SimpleAsyncTaskExecutor

字段详细资料

• UNBOUNDED_CONCURRENCY

  public static final int UNBOUNDED_CONCURRENCY

  Permit any number of concurrent invocations: that is, don't throttle concurrency.

  另请参阅:

  ConcurrencyThrottleSupport.UNBOUNDED_CONCURRENCY, 常量字段值

• NO_CONCURRENCY

  public static final int NO_CONCURRENCY

  Switch concurrency 'off': that is, don't allow any concurrent invocations.

  另请参阅:

  ConcurrencyThrottleSupport.NO_CONCURRENCY, 常量字段值

构造器详细资料

• SimpleAsyncTaskExecutor

  public SimpleAsyncTaskExecutor()

  Create a new SimpleAsyncTaskExecutor with default thread name prefix.

• SimpleAsyncTaskExecutor

  public SimpleAsyncTaskExecutor​(String threadNamePrefix)

  Create a new SimpleAsyncTaskExecutor with the given thread name prefix.

  参数:

  threadNamePrefix - the prefix to use for the names of newly created threads

• SimpleAsyncTaskExecutor

  public SimpleAsyncTaskExecutor​(ThreadFactory threadFactory)

  Create a new SimpleAsyncTaskExecutor with the given external thread factory.

  参数:

  threadFactory - the factory to use for creating new Threads

方法详细资料

• setThreadFactory

  public void setThreadFactory​(ThreadFactory threadFactory)

  Specify an external factory to use for creating new Threads, instead of relying on the local properties of this executor.

  You may specify an inner ThreadFactory bean or also a ThreadFactory reference obtained from JNDI (on a Java EE 6 server) or some other lookup mechanism.

  另请参阅:

  CustomizableThreadCreator.setThreadNamePrefix(java.lang.String), CustomizableThreadCreator.setThreadPriority(int)

• getThreadFactory

  public final ThreadFactory getThreadFactory()

  Return the external factory to use for creating new Threads, if any.

• setTaskDecorator

  public final void setTaskDecorator​(TaskDecorator taskDecorator)

  Specify a custom TaskDecorator to be applied to any Runnable about to be executed.

  Note that such a decorator is not necessarily being applied to the user-supplied Runnable/Callable but rather to the actual execution callback (which may be a wrapper around the user-supplied task).

  The primary use case is to set some execution context around the task's invocation, or to provide some monitoring/statistics for task execution.

  NOTE: Exception handling in TaskDecorator implementations is limited to plain Runnable execution via execute calls. In case of #submit calls, the exposed Runnable will be a FutureTask which does not propagate any exceptions; you might have to cast it and call Future#get to evaluate exceptions.

  从以下版本开始:

  4.3

• setConcurrencyLimit

  public void setConcurrencyLimit​(int concurrencyLimit)

  Set the maximum number of parallel accesses allowed. -1 indicates no concurrency limit at all.

  In principle, this limit can be changed at runtime, although it is generally designed as a config time setting. NOTE: Do not switch between -1 and any concrete limit at runtime, as this will lead to inconsistent concurrency counts: A limit of -1 effectively turns off concurrency counting completely.

  另请参阅:

  UNBOUNDED_CONCURRENCY

• getConcurrencyLimit

  public final int getConcurrencyLimit()

  Return the maximum number of parallel accesses allowed.

• isThrottleActive

  public final boolean isThrottleActive()

  Return whether this throttle is currently active.

  返回:

  true if the concurrency limit for this instance is active

  另请参阅:

  getConcurrencyLimit(), setConcurrencyLimit(int)

• execute

  public void execute​(Runnable task)

  Executes the given task, within a concurrency throttle if configured (through the superclass's settings).

  指定者:

  execute 在接口中 Executor

  指定者:

  execute 在接口中 TaskExecutor

  参数:

  task - the Runnable to execute (never null)

  另请参阅:

  doExecute(Runnable)

• execute

  public void execute​(Runnable task,
                      long startTimeout)

  Executes the given task, within a concurrency throttle if configured (through the superclass's settings).

  Executes urgent tasks (with 'immediate' timeout) directly, bypassing the concurrency throttle (if active). All other tasks are subject to throttling.

  指定者:

  execute 在接口中 AsyncTaskExecutor

  参数:

  task - the Runnable to execute (never null)

  startTimeout - the time duration (milliseconds) within which the task is supposed to start. This is intended as a hint to the executor, allowing for preferred handling of immediate tasks. Typical values are AsyncTaskExecutor.TIMEOUT_IMMEDIATE or AsyncTaskExecutor.TIMEOUT_INDEFINITE (the default as used by TaskExecutor.execute(Runnable)).

  另请参阅:

  AsyncTaskExecutor.TIMEOUT_IMMEDIATE, doExecute(Runnable)

• submit

  public Future<?> submit​(Runnable task)

  从接口复制的说明: AsyncTaskExecutor
  Submit a Runnable task for execution, receiving a Future representing that task. The Future will return a null result upon completion.

  指定者:

  submit 在接口中 AsyncTaskExecutor

  参数:

  task - the Runnable to execute (never null)

  返回:

  a Future representing pending completion of the task

• submit

  public <T> Future<T> submit​(Callable<T> task)

  从接口复制的说明: AsyncTaskExecutor
  Submit a Callable task for execution, receiving a Future representing that task. The Future will return the Callable's result upon completion.

  指定者:

  submit 在接口中 AsyncTaskExecutor

  参数:

  task - the Callable to execute (never null)

  返回:

  a Future representing pending completion of the task

• submitListenable

  public ListenableFuture<?> submitListenable​(Runnable task)

  从接口复制的说明: AsyncListenableTaskExecutor
  Submit a Runnable task for execution, receiving a ListenableFuture representing that task. The Future will return a null result upon completion.

  指定者:

  submitListenable 在接口中 AsyncListenableTaskExecutor

  参数:

  task - the Runnable to execute (never null)

  返回:

  a ListenableFuture representing pending completion of the task

• submitListenable

  public <T> ListenableFuture<T> submitListenable​(Callable<T> task)

  从接口复制的说明: AsyncListenableTaskExecutor
  Submit a Callable task for execution, receiving a ListenableFuture representing that task. The Future will return the Callable's result upon completion.

  指定者:

  submitListenable 在接口中 AsyncListenableTaskExecutor

  参数:

  task - the Callable to execute (never null)

  返回:

  a ListenableFuture representing pending completion of the task

• doExecute

  protected void doExecute​(Runnable task)

  Template method for the actual execution of a task.

  The default implementation creates a new Thread and starts it.

  参数:

  task - the Runnable to execute

  另请参阅:

  setThreadFactory(java.util.concurrent.ThreadFactory), CustomizableThreadCreator.createThread(java.lang.Runnable), Thread.start()