com.zoltran.perf.aspect.PerformanceMonitorAspect.java Source code

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Here is the source code for com.zoltran.perf.aspect.PerformanceMonitorAspect.java

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/*
 * Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package com.zoltran.perf.aspect;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.zoltran.perf.MeasurementRecorderSource;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author zoly
 */
@Aspect
public class PerformanceMonitorAspect {

    private static final Logger LOG = LoggerFactory.getLogger(PerformanceMonitorAspect.class);
    private static final LoadingCache<Class<? extends RecorderSourceInstance>, MeasurementRecorderSource> mrecSources = CacheBuilder
            .newBuilder().concurrencyLevel(8)
            .build(new CacheLoader<Class<? extends RecorderSourceInstance>, MeasurementRecorderSource>() {
                @Override
                public MeasurementRecorderSource load(Class<? extends RecorderSourceInstance> key)
                        throws Exception {
                    return (MeasurementRecorderSource) key.getField("INSTANCE").get(null);
                }
            });

    @Around(value = "execution(@com.zoltran.perf.aspect.PerformanceMonitor * *(..)) && @annotation(annot)", argNames = "pjp,annot")
    public Object performanceMonitoredMethod(ProceedingJoinPoint pjp, PerformanceMonitor annot) throws Throwable {
        final long start = System.currentTimeMillis();
        Object result = pjp.proceed();
        final long elapsed = System.currentTimeMillis() - start;
        MeasurementRecorderSource mrs = mrecSources.getUnchecked(annot.recorderSource());
        mrs.getRecorder(pjp.toLongString()).record(elapsed);
        if (elapsed > annot.warnThresholdMillis()) {
            if (elapsed > annot.errorThresholdMillis()) {
                LOG.error("Execution time  {} ms for {} exceeds error threshold of {} ms, arguments {}",
                        new Object[] { elapsed, pjp.toShortString(), annot.errorThresholdMillis(), pjp.getArgs() });
            } else {
                LOG.warn("Execution time  {} ms for {} exceeds warning threshold of {} ms, arguments {}",
                        new Object[] { elapsed, pjp.toShortString(), annot.warnThresholdMillis(), pjp.getArgs() });
            }
        } else {
            LOG.debug("Execution time {} ms for {}, arguments {}",
                    new Object[] { elapsed, pjp.toShortString(), pjp.getArgs() });
        }
        return result;
    }
}