org.springframework.http.server

Class ServletServerHttpAsyncRequestControl

java.lang.Object

org.springframework.http.server.ServletServerHttpAsyncRequestControl

All Implemented Interfaces:

EventListener, AsyncListener, ServerHttpAsyncRequestControl

public class ServletServerHttpAsyncRequestControl
extends Object
implements ServerHttpAsyncRequestControl, AsyncListener

A ServerHttpAsyncRequestControl to use on Servlet containers (Servlet 3.0+).

Since:

4.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
ServletServerHttpAsyncRequestControl(ServletServerHttpRequest request, ServletServerHttpResponse response) Constructor accepting a request and response pair that are expected to be of type ServletServerHttpRequest and ServletServerHttpResponse respectively.

Method Summary

Modifier and Type	Method and Description
void	complete() Mark asynchronous request processing as completed.
boolean	isCompleted() Return whether asynchronous request processing has been completed.
boolean	isStarted() Return whether asynchronous request processing has been started.
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.
void	start() Enable asynchronous processing after which the response remains open until a call to ServerHttpAsyncRequestControl.complete() is made or the server times out the request.
void	start(long timeout) A variation on ServerHttpAsyncRequestControl.start() that allows specifying a timeout value to use to use for asynchronous processing.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ServletServerHttpAsyncRequestControl

public ServletServerHttpAsyncRequestControl(ServletServerHttpRequest request,
                                            ServletServerHttpResponse response)

Constructor accepting a request and response pair that are expected to be of type ServletServerHttpRequest and ServletServerHttpResponse respectively.

Method Detail

isStarted

public boolean isStarted()

Description copied from interface: ServerHttpAsyncRequestControl

Return whether asynchronous request processing has been started.

Specified by:

isStarted in interface ServerHttpAsyncRequestControl

isCompleted

public boolean isCompleted()

Description copied from interface: ServerHttpAsyncRequestControl

Return whether asynchronous request processing has been completed.

Specified by:

isCompleted in interface ServerHttpAsyncRequestControl

start

public void start()

Description copied from interface: ServerHttpAsyncRequestControl

Enable asynchronous processing after which the response remains open until a call to ServerHttpAsyncRequestControl.complete() is made or the server times out the request. Once enabled, additional calls to this method are ignored.

Specified by:

start in interface ServerHttpAsyncRequestControl

start

public void start(long timeout)

Description copied from interface: ServerHttpAsyncRequestControl

A variation on ServerHttpAsyncRequestControl.start() that allows specifying a timeout value to use to use for asynchronous processing. If ServerHttpAsyncRequestControl.complete() is not called within the specified value, the request times out.

Specified by:

start in interface ServerHttpAsyncRequestControl

complete

public void complete()

Description copied from interface: ServerHttpAsyncRequestControl

Mark asynchronous request processing as completed.

Specified by:

complete in interface ServerHttpAsyncRequestControl

onComplete

public void onComplete(AsyncEvent event)
                throws IOException

Description copied from interface: javax.servlet.AsyncListener

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.

Specified by:

onComplete in interface AsyncListener

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

onStartAsync

public void onStartAsync(AsyncEvent event)
                  throws IOException

Description copied from interface: javax.servlet.AsyncListener

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.

Specified by:

onStartAsync in interface AsyncListener

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

onError

public void onError(AsyncEvent event)
             throws IOException

Description copied from interface: javax.servlet.AsyncListener

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.

Specified by:

onError in interface AsyncListener

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

onTimeout

public void onTimeout(AsyncEvent event)
               throws IOException

Description copied from interface: javax.servlet.AsyncListener

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.

Specified by:

onTimeout in interface AsyncListener

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