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Tapestry » org » apache » tapestry » ioc » services » LoggingDecorator.java
// Copyright 2006 The Apache Software Foundation
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//     http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.

package org.apache.tapestry.ioc.services;

import org.apache.commons.logging.Log;

 * Service that can create a logging interceptor that wraps around a service implementation (or
 * interceptor). The interceptor works with the service's log to log, at debug level, method entry
 * (with arguments), method exit (with return value, if any) as well as any thrown exceptions.
public interface LoggingDecorator
     * Builds a logging interceptor instance.
     * @param <T>
     * @param serviceInterface
     *            interface implemented by the delegate
     * @param delegate
     *            existing object to be wrapped
     * @param serviceId
     *            id of service
     * @param serviceLog
     *            log used for debug level logging messages by the interceptor
     * @return a new object implementing the interface that can be used in place of the delegate,
     *         providing logging behavior around each method call on the service interface
    <T> T build(Class<T> serviceInterface, T delegate, String serviceId, Log serviceLog);
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