Java tutorial
/* Developed with the contribution of the European Commission - Directorate General for Maritime Affairs and Fisheries European Union, 2015-2016. This file is part of the Integrated Fisheries Data Management (IFDM) Suite. The IFDM Suite is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version. The IFDM Suite is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the IFDM Suite. If not, see <http://www.gnu.org/licenses/>. */ package eu.europa.ec.fisheries.uvms.interceptors; import com.google.common.base.Stopwatch; import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang.ObjectUtils; import javax.interceptor.AroundInvoke; import javax.interceptor.InvocationContext; @Slf4j public class TracingInterceptor { @AroundInvoke public Object logCall(InvocationContext context) throws Exception { final Stopwatch stopwatch = Stopwatch.createStarted(); try { Object[] parameters = context.getParameters(); String params = ""; for (Object parameter : parameters) { params += " " + String.valueOf(parameter); } log.debug(String.format("invocation of method %s with parameters %s", context.getMethod(), params)); return context.proceed(); } finally { log.info(String.format("Elapsed time ==> " + stopwatch)); } } }