    001    // Copyright 2006, 2007, 2009 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.services;
    016
    017    import org.slf4j.Logger;
    018
    019    /**
    020     * Service that can create a logging interceptor that wraps around a service implementation (or interceptor). The
    021     * interceptor works with the service's log to log, at debug level, method entry (with arguments), method exit (with
    022     * return value, if any) as well as any thrown exceptions.
    023     * <p/>
    024     * This represents the Tapestry 5.0 decorator approach; for Tapestry 5.1 you may want to use the {@link
    025     * org.apache.tapestry5.ioc.services.LoggingAdvisor} in conjunction with a service advisor method.
    026     */
    027    public interface LoggingDecorator
    028    {
    029        /**
    030         * Builds a logging interceptor instance.
    031         *
    032         * @param <T>
    033         * @param serviceInterface interface implemented by the delegate
    034         * @param delegate         existing object to be wrapped
    035         * @param serviceId        id of service
    036         * @param logger           log used for debug level logging messages by the interceptor
    037         * @return a new object implementing the interface that can be used in place of the delegate, providing logging
    038         *         behavior around each method call on the service interface
    039         */
    040        <T> T build(Class<T> serviceInterface, T delegate, String serviceId, Logger logger);
    041    }