001    // Copyright 2011 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    package org.apache.tapestry5.internal.services;
015    
016    import org.apache.tapestry5.services.ComponentClassResolver;
017    import org.apache.tapestry5.services.InvalidationEventHub;
018    import org.apache.tapestry5.services.InvalidationListener;
019    
020    /**
021     * Split-out implementation of {@link InvalidationEventHub} that separates it from {@link ComponentInstantiatorSource}.
022     * This was necessary due to some refactoring that made {@link ComponentClassResolver} and ComponentInstantiatorSource
023     * mutually dependent.
024     *
025     * @since 5.3
026     */
027    public interface InternalComponentInvalidationEventHub extends InvalidationEventHub
028    {
029        /**
030         * Invoked when the {@link ComponentInstantiatorSource} notices that
031         * a class file within any of the controlled packages has changed. Fires the
032         * {@link InvalidationListener#objectWasInvalidated()} notification.
033         */
034        void classInControlledPackageHasChanged();
035    }