public class SimpleAsyncTaskExecutor extends CustomizableThreadCreator implements AsyncTaskExecutor, Serializable
TaskExecutor implementation that fires up a new Thread for each task,
executing it asynchronously.
Supports limiting concurrent threads through the "concurrencyLimit" bean property. By default, the number of concurrent threads is unlimited.
NOTE: This implementation does not reuse threads! Consider a thread-pooling TaskExecutor implementation instead, in particular for executing a large number of short-lived tasks.
setConcurrencyLimit(int),
SyncTaskExecutor,
org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor,
org.springframework.scheduling.commonj.WorkManagerTaskExecutor,
Serialized Form| Modifier and Type | Field and Description |
|---|---|
static int |
NO_CONCURRENCY
Switch concurrency 'off': that is, don't allow any concurrent invocations.
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static int |
UNBOUNDED_CONCURRENCY
Permit any number of concurrent invocations: that is, don't throttle concurrency.
|
TIMEOUT_IMMEDIATE, TIMEOUT_INDEFINITE| Constructor and Description |
|---|
SimpleAsyncTaskExecutor()
Create a new SimpleAsyncTaskExecutor with default thread name prefix.
|
SimpleAsyncTaskExecutor(String threadNamePrefix)
Create a new SimpleAsyncTaskExecutor with the given thread name prefix.
|
SimpleAsyncTaskExecutor(ThreadFactory threadFactory)
Create a new SimpleAsyncTaskExecutor with the given external thread factory.
|
| Modifier and Type | Method and Description |
|---|---|
protected void |
doExecute(Runnable task)
Template method for the actual execution of a task.
|
void |
execute(Runnable task)
Executes the given task, within a concurrency throttle
if configured (through the superclass's settings).
|
void |
execute(Runnable task,
long startTimeout)
Executes the given task, within a concurrency throttle
if configured (through the superclass's settings).
|
int |
getConcurrencyLimit()
Return the maximum number of parallel accesses allowed.
|
ThreadFactory |
getThreadFactory()
Return the external factory to use for creating new Threads, if any.
|
boolean |
isThrottleActive()
Return whether this throttle is currently active.
|
void |
setConcurrencyLimit(int concurrencyLimit)
Set the maximum number of parallel accesses allowed.
|
void |
setThreadFactory(ThreadFactory threadFactory)
Specify an external factory to use for creating new Threads,
instead of relying on the local properties of this executor.
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<T> Future<T> |
submit(Callable<T> task)
Submit a Callable task for execution, receiving a Future representing that task.
|
Future<?> |
submit(Runnable task)
Submit a Runnable task for execution, receiving a Future representing that task.
|
createThread, getDefaultThreadNamePrefix, getThreadGroup, getThreadNamePrefix, getThreadPriority, isDaemon, nextThreadName, setDaemon, setThreadGroup, setThreadGroupName, setThreadNamePrefix, setThreadPrioritypublic static final int UNBOUNDED_CONCURRENCY
public static final int NO_CONCURRENCY
public SimpleAsyncTaskExecutor()
public SimpleAsyncTaskExecutor(String threadNamePrefix)
threadNamePrefix - the prefix to use for the names of newly created threadspublic SimpleAsyncTaskExecutor(ThreadFactory threadFactory)
threadFactory - the factory to use for creating new Threadspublic void setThreadFactory(ThreadFactory threadFactory)
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.
public final ThreadFactory getThreadFactory()
public void setConcurrencyLimit(int concurrencyLimit)
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.
UNBOUNDED_CONCURRENCYpublic final int getConcurrencyLimit()
public final boolean isThrottleActive()
true if the concurrency limit for this instance is activegetConcurrencyLimit(),
setConcurrencyLimit(int)public void execute(Runnable task)
execute in interface Executorexecute in interface TaskExecutortask - the Runnable to execute (never null)doExecute(Runnable)public void execute(Runnable task, long startTimeout)
Executes urgent tasks (with 'immediate' timeout) directly, bypassing the concurrency throttle (if active). All other tasks are subject to throttling.
execute in interface AsyncTaskExecutortask - 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)).AsyncTaskExecutor.TIMEOUT_IMMEDIATE,
doExecute(Runnable)public Future<?> submit(Runnable task)
AsyncTaskExecutornull result upon completion.submit in interface AsyncTaskExecutortask - the Runnable to execute (never null)public <T> Future<T> submit(Callable<T> task)
AsyncTaskExecutorsubmit in interface AsyncTaskExecutortask - the Callable to execute (never null)protected void doExecute(Runnable task)
The default implementation creates a new Thread and starts it.
task - the Runnable to executesetThreadFactory(java.util.concurrent.ThreadFactory),
CustomizableThreadCreator.createThread(java.lang.Runnable),
Thread.start()