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The Java Portlet API version 2.1.0 developed by the Java Community Process JSR-286 Expert Group.

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/*  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.
 */

/*
 * This source code implements specifications defined by the Java
 * Community Process. In order to remain compliant with the specification
 * DO NOT add / change / or delete method signatures!
 */

package javax.portlet;

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

/**
 * Annotation for marking a method for handling
 * a specific event.
 * The GenericPortlet tries to dispatch to methods annotated 
 * with the tag @ProcessEvent for any received event.
 *
 * @since 2.0
 */
@Target(ElementType.METHOD)
@Retention(java.lang.annotation.RetentionPolicy.RUNTIME)
public @interface ProcessEvent {
    /**
     * Event QName.
     * Must be in the format:
 
     * "{" + Namespace URI + "}" + local part.
 
     * If the Namespace URI equals(XMLConstants.NULL_NS_URI), 
     * only the local part is used 
     * (like the javax.xml.namespace.QName.toString() method).
     * 
     * @return event QName.
     */
    String qname() default "";
    
    /**
     * Local part of the event name.
     * The namespace for the events is either taken from the default-event-namespace element
     * in the portlet deployment descriptor, or if this element is not provided
     * the XML default namespace XMLConstants.NULL_NS_URI is used.
     * 
     * @return local part of the event name.
     */
    String name() default "";

}