jakarta.servlet.annotation.WebListener Maven / Gradle / Ivy
/*
* 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 jakarta.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: {@link jakarta.servlet.http.HttpSessionAttributeListener},
* {@link jakarta.servlet.http.HttpSessionListener},
* {@link jakarta.servlet.ServletContextAttributeListener},
* {@link jakarta.servlet.ServletContextListener},
* {@link jakarta.servlet.ServletRequestAttributeListener},
* {@link jakarta.servlet.ServletRequestListener} or
* {@link jakarta.servlet.http.HttpSessionIdListener}
*
*
* E.g. @WebListener
* public TestListener implements ServletContextListener {
*
* @since Servlet 3.0
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface WebListener {
/**
* @return description of the listener, if present
*/
String value() default "";
}