001    // Copyright 2008 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.tapestry5.services;
016    
017    import java.lang.annotation.*;
018    
019    
020    /**
021     * Marker annotation used to inject the correct {@link org.apache.tapestry5.services.InvalidationEventHub} service
022     * responsible for validations when component message catalog (i.e., ".properties") files change.
023     *
024     * @since 5.1.0.0
025     */
026    @Target({ElementType.PARAMETER, ElementType.FIELD})
027    @Retention(RetentionPolicy.RUNTIME)
028    @Documented
029    public @interface ComponentMessages
030    {
031    }