org.treetank.aspects.logging.LoggerAspect Maven / Gradle / Ivy

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/**
 * Copyright (c) 2011, University of Konstanz, Distributed Systems Group
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the University of Konstanz nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL  BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.treetank.aspects.logging;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.ILoggerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Aspect
public class LoggerAspect {

    private static final ILoggerFactory FACTORY = LoggerFactory.getILoggerFactory();

    /**
     * Injection point for logging aspect
     * 
     * @param pjp
     *            where the inject takes pace
     * @return the point reaches
     * @throws Throwable
     *             if anything happens
     */
    @Around("@annotation(org.treetank.aspects.logging.Logging)")
    public Object advice(ProceedingJoinPoint pjp) throws Throwable {
        final Signature sig = pjp.getSignature();
        final Logger logger = FACTORY.getLogger(sig.getDeclaringTypeName());
        logger.debug(new StringBuilder("Entering ").append(sig.getDeclaringTypeName()).toString());
        final Object returnVal = pjp.proceed();
        logger.debug(new StringBuilder("Exiting ").append(sig.getDeclaringTypeName()).toString());
        return returnVal;
    }

}