public class AsyncExecutionInterceptor extends AsyncExecutionAspectSupport implements MethodInterceptor, Ordered
MethodInterceptor that processes method invocations
asynchronously, using a given AsyncTaskExecutor.
Typically used with the Async annotation.
In terms of target method signatures, any parameter types are supported.
However, the return type is constrained to either void or
java.util.concurrent.Future. In the latter case, the Future handle
returned from the proxy will be an actual asynchronous Future that can be used
to track the result of the asynchronous method execution. However, since the
target method needs to implement the same signature, it will have to return
a temporary Future handle that just passes the return value through
(like Spring's AsyncResult
or EJB 3.1's javax.ejb.AsyncResult).
When the return type is java.util.concurrent.Future, any exception thrown
during the execution can be accessed and managed by the caller. With void
return type however, such exceptions cannot be transmitted back. In that case an
AsyncUncaughtExceptionHandler can be registered to process such exceptions.
As of Spring 3.1.2 the AnnotationAsyncExecutionInterceptor subclass is
preferred for use due to its support for executor qualification in conjunction with
Spring's @Async annotation.
Async,
AsyncAnnotationAdvisor,
AnnotationAsyncExecutionInterceptorDEFAULT_TASK_EXECUTOR_BEAN_NAME, loggerHIGHEST_PRECEDENCE, LOWEST_PRECEDENCE| Constructor and Description |
|---|
AsyncExecutionInterceptor(java.util.concurrent.Executor defaultExecutor)
Create a new instance with a default
AsyncUncaughtExceptionHandler. |
AsyncExecutionInterceptor(java.util.concurrent.Executor defaultExecutor,
AsyncUncaughtExceptionHandler exceptionHandler)
Create a new
AsyncExecutionInterceptor. |
| Modifier and Type | Method and Description |
|---|---|
protected java.util.concurrent.Executor |
getDefaultExecutor(BeanFactory beanFactory)
This implementation searches for a unique
TaskExecutor
bean in the context, or for an Executor bean named "taskExecutor" otherwise. |
protected java.lang.String |
getExecutorQualifier(java.lang.reflect.Method method)
This implementation is a no-op for compatibility in Spring 3.1.2.
|
int |
getOrder()
Get the order value of this object.
|
java.lang.Object |
invoke(MethodInvocation invocation)
Intercept the given method invocation, submit the actual calling of the method to
the correct task executor and return immediately to the caller.
|
configure, determineAsyncExecutor, doSubmit, findQualifiedExecutor, handleError, setBeanFactory, setExceptionHandler, setExecutorpublic AsyncExecutionInterceptor(@Nullable java.util.concurrent.Executor defaultExecutor)
AsyncUncaughtExceptionHandler.defaultExecutor - the Executor (typically a Spring AsyncTaskExecutor
or ExecutorService) to delegate to;
as of 4.2.6, a local executor for this interceptor will be built otherwisepublic AsyncExecutionInterceptor(@Nullable java.util.concurrent.Executor defaultExecutor, AsyncUncaughtExceptionHandler exceptionHandler)
AsyncExecutionInterceptor.defaultExecutor - the Executor (typically a Spring AsyncTaskExecutor
or ExecutorService) to delegate to;
as of 4.2.6, a local executor for this interceptor will be built otherwiseexceptionHandler - the AsyncUncaughtExceptionHandler to use@Nullable public java.lang.Object invoke(MethodInvocation invocation) throws java.lang.Throwable
invoke in interface MethodInterceptorinvocation - the method to intercept and make asynchronousFuture if the original method returns Future; null
otherwise.java.lang.Throwable - if the interceptors or the target object
throws an exception@Nullable protected java.lang.String getExecutorQualifier(java.lang.reflect.Method method)
getExecutorQualifier in class AsyncExecutionAspectSupportmethod - the method to inspect for executor qualifier metadatanullAsyncExecutionAspectSupport.determineAsyncExecutor(Method)@Nullable protected java.util.concurrent.Executor getDefaultExecutor(@Nullable BeanFactory beanFactory)
TaskExecutor
bean in the context, or for an Executor bean named "taskExecutor" otherwise.
If neither of the two is resolvable (e.g. if no BeanFactory was configured at all),
this implementation falls back to a newly created SimpleAsyncTaskExecutor instance
for local use if no default could be found.getDefaultExecutor in class AsyncExecutionAspectSupportbeanFactory - the BeanFactory to use for a default executor lookupnull if none availableAsyncExecutionAspectSupport.DEFAULT_TASK_EXECUTOR_BEAN_NAMEpublic int getOrder()
OrderedHigher values are interpreted as lower priority. As a consequence,
the object with the lowest value has the highest priority (somewhat
analogous to Servlet load-on-startup values).
Same order values will result in arbitrary sort positions for the affected objects.
getOrder in interface OrderedOrdered.HIGHEST_PRECEDENCE,
Ordered.LOWEST_PRECEDENCE