    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
    015package org.apache.tapestry5.ioc.internal.util;
    016
    017import org.apache.tapestry5.ioc.Invokable;
    018import org.slf4j.Logger;
    019
    020/**
    021 * @since 5.3
    022 */
    023public 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    @Override
    039    public T invoke()
    040    {
    041        logger.debug(message);
    042
    043        return delegate.invoke();
    044    }
    045}