Aspect for profile methods

LoggingAspect.java

/*
 * Copyright (c) 2015.
 * [email protected]
 */

package com.daven.aspects;

import com.google.common.base.Stopwatch;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.lang.reflect.Field;
import java.util.concurrent.TimeUnit;

@Aspect
@Component
public class LoggingControllerAspect {

    private static final int MAX_LENGTH_OF_ARGS_FOR_LOGS = 300;
    private static final String PREFIX = "AOP:*******";

    @Around("(anyRepositoryPointcut() && anyComponent())")
    public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable {
        logMethod(pjp);
        return logElapsedTime(pjp);
    }

    private Object logElapsedTime(ProceedingJoinPoint pjp) throws Throwable {
        Stopwatch stopwatch = Stopwatch.createStarted();
        Object returnValue = pjp.proceed();
        final Logger logger = getLogger(pjp);
        logger.info("{}Method:{}:{}",
                PREFIX,
                pjp.getSignature().toShortString(),
                stopwatch.elapsed(TimeUnit.MICROSECONDS));
        return returnValue;
    }

    private void logMethod(ProceedingJoinPoint pjp) {
        final Logger logger = getLogger(pjp);
        logger.info("{}Method:{}",
                PREFIX,
                pjp.getSignature().toShortString());
        for (Object signatureArg : pjp.getArgs()) {
            if(signatureArg!=null){
                logger.debug("{}Args:{}",
                        PREFIX,
                        truncatedString(signatureArg.toString(), MAX_LENGTH_OF_ARGS_FOR_LOGS));
            }
        }
    }

    public static Logger getLogger(org.aspectj.lang.JoinPoint joinPoint) {
        try {
            Class declaringType = joinPoint.getSignature().getDeclaringType();
            Field loggerField = getLoggerField(declaringType);
            loggerField.setAccessible(true);
            return (Logger) loggerField.get(joinPoint.getTarget());
        } catch (NoSuchFieldException e) {
            System.out.println("no logger found");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return LoggerFactory.getLogger(LoggingControllerAspect.class);
    }

    //this can be improved, inspecting the class and looking for logger types
    private static Field getLoggerField(Class declaringType) throws NoSuchFieldException {
        return declaringType.getDeclaredField("logger");
    }

    private String truncatedString(String string, int numberChar){
    	return string.length()<numberChar ?string : string.substring(0, numberChar)+"...";
    }

    //change the packaging
    @Pointcut("within(com.daven.repositories.*)")
    public void anyRepositoryPointcut() {
    }

    @Pointcut("@target(org.springframework.stereotype.Component)")
    public void anyComponent() {

    }
}