    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
    015    package org.apache.tapestry5.ioc.internal.util;
    016
    017    import org.apache.tapestry5.ioc.Invokable;
    018    import org.slf4j.Logger;
    019
    020    /**
    021     * @since 5.3
    022     */
    023    public class LoggingInvokableWrapper<T> implements Invokable<T>
    024    {
    025        private final Logger logger;
    026
    027        private final String message;
    028
    029        private final Invokable<T> delegate;
    030
    031        public LoggingInvokableWrapper(Logger logger, String message, Invokable<T> delegate)
    032        {
    033            this.logger = logger;
    034            this.message = message;
    035            this.delegate = delegate;
    036        }
    037
    038        public T invoke()
    039        {
    040            logger.debug(message);
    041
    042            return delegate.invoke();
    043        }
    044    }