    001    // Copyright 2008, 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.services;
    016
    017    import org.apache.tapestry5.ioc.services.ExceptionTracker;
    018    import org.apache.tapestry5.plastic.MethodAdvice;
    019    import org.apache.tapestry5.plastic.MethodInvocation;
    020    import org.slf4j.Logger;
    021
    022    public class LoggingAdvice implements MethodAdvice
    023    {
    024        private final MethodLogger methodLogger;
    025
    026        public LoggingAdvice(Logger logger, ExceptionTracker exceptionTracker)
    027        {
    028            methodLogger = new MethodLogger(logger, exceptionTracker);
    029        }
    030
    031        public void advise(MethodInvocation invocation)
    032        {
    033            boolean debug = methodLogger.isDebugEnabled();
    034
    035            if (!debug)
    036            {
    037                invocation.proceed();
    038                return;
    039            }
    040
    041            methodLogger.entry(invocation);
    042
    043            try
    044            {
    045                invocation.proceed();
    046            }
    047            catch (RuntimeException ex)
    048            {
    049                methodLogger.fail(invocation, ex);
    050
    051                throw ex;
    052            }
    053
    054            if (invocation.didThrowCheckedException())
    055            {
    056                Exception thrown = invocation.getCheckedException(Exception.class);
    057
    058                methodLogger.fail(invocation, thrown);
    059
    060                return;
    061            }
    062
    063            methodLogger.exit(invocation);
    064        }
    065    }