/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package javax.servlet.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

The annotation used to declare a listener for various types of event, in a given web application context.

The class annotated MUST implement one, (or more), of the following interfaces: HttpSessionAttributeListener, HttpSessionListener, ServletContextAttributeListener, ServletContextListener, ServletRequestAttributeListener, ServletRequestListener or HttpSessionIdListener
E.g. @WebListener
public TestListener implements ServletContextListener {
Since:Servlet 3.0
/** * The annotation used to declare a listener for various types of event, in a * given web application context.<br> * <br> * * The class annotated MUST implement one, (or more), of the following * interfaces: {@link javax.servlet.http.HttpSessionAttributeListener}, * {@link javax.servlet.http.HttpSessionListener}, * {@link javax.servlet.ServletContextAttributeListener}, * {@link javax.servlet.ServletContextListener}, * {@link javax.servlet.ServletRequestAttributeListener}, * {@link javax.servlet.ServletRequestListener} or * {@link javax.servlet.http.HttpSessionIdListener} * <br> * * E.g. <code>@WebListener</code><br> * <code>public TestListener implements ServletContextListener {</code><br> * * @since Servlet 3.0 */
@Target(ElementType.TYPE) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface WebListener {
Returns:description of the listener, if present
/** * @return description of the listener, if present */
String value() default ""; }