All Superinterfaces:

EventListener
```
public interface AsyncListener
extends EventListener
```
Listener that will be notified in the event that an asynchronous operation initiated on a ServletRequest to which the listener had been added has completed, timed out, or resulted in an error.

Since:

Servlet 3.0

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`onComplete(AsyncEvent event)` Notifies this AsyncListener that an asynchronous operation has been completed.
`void`	`onError(AsyncEvent event)` Notifies this AsyncListener that an asynchronous operation has failed to complete.
`void`	`onStartAsync(AsyncEvent event)` Notifies this AsyncListener that a new asynchronous cycle is being initiated via a call to one of the `ServletRequest.startAsync()` methods.
`void`	`onTimeout(AsyncEvent event)` Notifies this AsyncListener that an asynchronous operation has timed out.

Erste Seite von API Java Inhaltsverzeichnis Haut

- Method Detail
  - onComplete
```
void onComplete(AsyncEvent event)
         throws IOException
```
    Notifies this AsyncListener that an asynchronous operation has been completed.
    The AsyncContext corresponding to the asynchronous operation that has been completed may be obtained by calling getAsyncContext on the given event.
    In addition, if this AsyncListener had been registered via a call to AsyncContext.addListener(AsyncListener, ServletRequest, ServletResponse), the supplied ServletRequest and ServletResponse objects may be retrieved by calling getSuppliedRequest and getSuppliedResponse, respectively, on the given event.
    
    Parameters:
    
    event - the AsyncEvent indicating that an asynchronous operation has been completed
    
    Throws:
    
    IOException - if an I/O related error has occurred during the processing of the given AsyncEvent
  - onTimeout
```
void onTimeout(AsyncEvent event)
        throws IOException
```
    Notifies this AsyncListener that an asynchronous operation has timed out.
    The AsyncContext corresponding to the asynchronous operation that has timed out may be obtained by calling getAsyncContext on the given event.
    In addition, if this AsyncListener had been registered via a call to AsyncContext.addListener(AsyncListener, ServletRequest, ServletResponse), the supplied ServletRequest and ServletResponse objects may be retrieved by calling getSuppliedRequest and getSuppliedResponse, respectively, on the given event.
    
    Parameters:
    
    event - the AsyncEvent indicating that an asynchronous operation has timed out
    
    Throws:
    
    IOException - if an I/O related error has occurred during the processing of the given AsyncEvent
  - onError
```
void onError(AsyncEvent event)
      throws IOException
```
    Notifies this AsyncListener that an asynchronous operation has failed to complete.
    The AsyncContext corresponding to the asynchronous operation that failed to complete may be obtained by calling getAsyncContext on the given event.
    In addition, if this AsyncListener had been registered via a call to AsyncContext.addListener(AsyncListener, ServletRequest, ServletResponse), the supplied ServletRequest and ServletResponse objects may be retrieved by calling getSuppliedRequest and getSuppliedResponse, respectively, on the given event.
    
    Parameters:
    
    event - the AsyncEvent indicating that an asynchronous operation has failed to complete
    
    Throws:
    
    IOException - if an I/O related error has occurred during the processing of the given AsyncEvent
  - onStartAsync
```
void onStartAsync(AsyncEvent event)
           throws IOException
```
    Notifies this AsyncListener that a new asynchronous cycle is being initiated via a call to one of the ServletRequest.startAsync() methods.
    The AsyncContext corresponding to the asynchronous operation that is being reinitialized may be obtained by calling getAsyncContext on the given event.
    In addition, if this AsyncListener had been registered via a call to AsyncContext.addListener(AsyncListener, ServletRequest, ServletResponse), the supplied ServletRequest and ServletResponse objects may be retrieved by calling getSuppliedRequest and getSuppliedResponse, respectively, on the given event.
    This AsyncListener will not receive any events related to the new asynchronous cycle unless it registers itself (via a call to AsyncContext.addListener(javax.servlet.AsyncListener)) with the AsyncContext that is delivered as part of the given AsyncEvent.
    
    Parameters:
    
    event - the AsyncEvent indicating that a new asynchronous cycle is being initiated
    
    Throws:
    
    IOException - if an I/O related error has occurred during the processing of the given AsyncEvent

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Dokument erstellt 11/06/2005, zuletzt geändert 18/08/2025
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-javaee-rf-javax/servlet/AsyncListener.html

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Referenzen

Manuel PHP : https://docs.oracle.com, AsyncListener (Java(TM) EE 7 Specification APIs)

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Interface AsyncListener

Method Summary

Method Detail

onComplete

onTimeout

onError

onStartAsync

Referenzen