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/*
* Copyright (c) 1997, 2023 Oracle and/or its affiliates and others.
* All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.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 final AsyncContext context;
private final ServletRequest request;
private final ServletResponse response;
private final 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, context.getRequest(), context.getResponse(), 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, context.getRequest(), context.getResponse(), 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;
}
}
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