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java.lang.Object org.springframework.util.CustomizableThreadCreator org.springframework.core.task.SimpleAsyncTaskExecutor
public class SimpleAsyncTaskExecutor
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
,
TimerTaskExecutor
,
ThreadPoolTaskExecutor
,
WorkManagerTaskExecutor
,
Serialized FormField Summary | |
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static String |
DEFAULT_THREAD_NAME_PREFIX
Deprecated. as of Spring 2.0.3, since the default thread name prefix is now taken from the concrete class (could be a subclass) |
static int |
NO_CONCURRENCY
Switch concurrency 'off': that is, don't allow any concurrent invocations. |
static int |
UNBOUNDED_CONCURRENCY
Permit any number of concurrent invocations: that is, don't throttle concurrency. |
Fields inherited from interface org.springframework.core.task.AsyncTaskExecutor |
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TIMEOUT_IMMEDIATE, TIMEOUT_INDEFINITE |
Constructor Summary | |
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SimpleAsyncTaskExecutor()
Create a new SimpleAsyncTaskExecutor with default thread name prefix. |
|
SimpleAsyncTaskExecutor(String threadNamePrefix)
Create a new SimpleAsyncTaskExecutor with the given thread name prefix. |
Method Summary | |
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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. |
boolean |
isThrottleActive()
Return whether this throttle is currently active. |
void |
setConcurrencyLimit(int concurrencyLimit)
Set the maximum number of parallel accesses allowed |
Methods inherited from class org.springframework.util.CustomizableThreadCreator |
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createThread, getDefaultThreadNamePrefix, getThreadGroup, getThreadNamePrefix, getThreadPriority, isDaemon, nextThreadName, setDaemon, setThreadGroup, setThreadGroupName, setThreadNamePrefix, setThreadPriority |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final String DEFAULT_THREAD_NAME_PREFIX
public static final int UNBOUNDED_CONCURRENCY
public static final int NO_CONCURRENCY
Constructor Detail |
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public SimpleAsyncTaskExecutor()
public SimpleAsyncTaskExecutor(String threadNamePrefix)
threadNamePrefix
- the prefix to use for the names of newly created threadsMethod Detail |
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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_CONCURRENCY
public int getConcurrencyLimit()
public boolean isThrottleActive()
true
if the concurrency limit for this instance is activegetConcurrencyLimit()
,
setConcurrencyLimit(int)
public void execute(Runnable task)
execute
in interface TaskExecutor
task
- 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 AsyncTaskExecutor
task
- the Runnable
to execute (never null
)startTimeout
- the time duration 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)
protected void doExecute(Runnable task)
The default implementation creates a new Thread and starts it.
task
- the Runnable to executeCustomizableThreadCreator.createThread(java.lang.Runnable)
,
Thread.start()
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