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package javax.servlet;
/**
* Event that gets fired when the asynchronous operation initiated on a
* ServletRequest (via a call to {@link ServletRequest#startAsync} or
* {@link ServletRequest#startAsync(ServletRequest, ServletResponse)})
* has completed, timed out, or produced an error.
*
* @since Servlet 3.0
*/
public class AsyncEvent {
private AsyncContext context;
private ServletRequest request;
private ServletResponse response;
private Throwable throwable;
/**
* Constructs an AsyncEvent from the given AsyncContext.
*
* @param context the AsyncContex to be delivered with this AsyncEvent
*/
public AsyncEvent(AsyncContext context) {
this(context, null, null, null);
}
/**
* Constructs an AsyncEvent from the given AsyncContext, ServletRequest,
* and ServletResponse.
*
* @param context the AsyncContex to be delivered with this AsyncEvent
* @param request the ServletRequest to be delivered with this AsyncEvent
* @param response the ServletResponse to be delivered with this
* AsyncEvent
*/
public AsyncEvent(AsyncContext context, ServletRequest request,
ServletResponse response) {
this(context, request, response, null);
}
/**
* Constructs an AsyncEvent from the given AsyncContext and Throwable.
*
* @param context the AsyncContex to be delivered with this AsyncEvent
* @param throwable the Throwable to be delivered with this AsyncEvent
*/
public AsyncEvent(AsyncContext context, Throwable throwable) {
this(context, null, null, throwable);
}
/**
* Constructs an AsyncEvent from the given AsyncContext, ServletRequest,
* ServletResponse, and Throwable.
*
* @param context the AsyncContex to be delivered with this AsyncEvent
* @param request the ServletRequest to be delivered with this AsyncEvent
* @param response the ServletResponse to be delivered with this
* AsyncEvent
* @param throwable the Throwable to be delivered with this AsyncEvent
*/
public AsyncEvent(AsyncContext context, ServletRequest request,
ServletResponse response, Throwable throwable) {
this.context = context;
this.request = request;
this.response = response;
this.throwable = throwable;
}
/**
* Gets the AsyncContext from this AsyncEvent.
*
* @return the AsyncContext that was used to initialize this AsyncEvent
*/
public AsyncContext getAsyncContext() {
return context;
}
/**
* Gets the ServletRequest from this AsyncEvent.
*
* <p>If the AsyncListener to which this AsyncEvent is being delivered
* was added using {@link AsyncContext#addListener(AsyncListener,
* ServletRequest, ServletResponse)}, the returned ServletRequest
* will be the same as the one supplied to the above method.
* If the AsyncListener was added via
* {@link AsyncContext#addListener(AsyncListener)}, this method
* must return null.
*
* @return the ServletRequest that was used to initialize this AsyncEvent,
* or null if this AsyncEvent was initialized without any ServletRequest
*/
public ServletRequest getSuppliedRequest() {
return request;
}
/**
* Gets the ServletResponse from this AsyncEvent.
*
* <p>If the AsyncListener to which this AsyncEvent is being delivered
* was added using {@link AsyncContext#addListener(AsyncListener,
* ServletRequest, ServletResponse)}, the returned ServletResponse
* will be the same as the one supplied to the above method.
* If the AsyncListener was added via
* {@link AsyncContext#addListener(AsyncListener)}, this method
* must return null.
*
* @return the ServletResponse that was used to initialize this AsyncEvent,
* or null if this AsyncEvent was initialized without any ServletResponse
*/
public ServletResponse getSuppliedResponse() {
return response;
}
/**
* Gets the Throwable from this AsyncEvent.
*
* @return the Throwable that was used to initialize this AsyncEvent,
* or null if this AsyncEvent was initialized without any Throwable
*/
public Throwable getThrowable() {
return throwable;
}
}