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}