001    // Copyright 2007 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.annotations;
016    
017    import java.lang.annotation.Documented;
018    import static java.lang.annotation.ElementType.METHOD;
019    import java.lang.annotation.Retention;
020    import static java.lang.annotation.RetentionPolicy.RUNTIME;
021    import java.lang.annotation.Target;
022    
023    /**
024     * Method annotation used for methods that should be invoked when the page is first attached to a request. This is
025     * useful for initializations that should occur on each request that involves the page. Often, such initializations will
026     * be balanced by cleanups when the page is detached.
027     * <p/>
028     * PageAttached methods should take no parameters and return void. They must either have this annotation, or be named
029     * "pageAttached".
030     *
031     * @see PageDetached
032     */
033    @Target(METHOD)
034    @Retention(RUNTIME)
035    @Documented
036    public @interface PageAttached
037    {
038    
039    }