org.springframework.integration.monitor.SimpleMessageHandlerMetrics.java Source code

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Here is the source code for org.springframework.integration.monitor.SimpleMessageHandlerMetrics.java

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/*
 * Copyright 2002-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.integration.monitor;

import java.util.concurrent.atomic.AtomicInteger;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.integration.Message;
import org.springframework.integration.core.MessageHandler;
import org.springframework.jmx.export.annotation.ManagedResource;
import org.springframework.util.StopWatch;

/**
 * @author Dave Syer
 * @since 2.0
 */
@ManagedResource
public class SimpleMessageHandlerMetrics implements MethodInterceptor, MessageHandlerMetrics {

    private static final Log logger = LogFactory.getLog(SimpleMessageHandlerMetrics.class);

    private static final int DEFAULT_MOVING_AVERAGE_WINDOW = 10;

    private final MessageHandler handler;

    private final AtomicInteger activeCount = new AtomicInteger();

    private final AtomicInteger handleCount = new AtomicInteger();

    private final AtomicInteger errorCount = new AtomicInteger();

    private final ExponentialMovingAverage duration = new ExponentialMovingAverage(DEFAULT_MOVING_AVERAGE_WINDOW);

    private volatile String name;

    private volatile String source;

    public SimpleMessageHandlerMetrics(MessageHandler handler) {
        this.handler = handler;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return this.name;
    }

    public void setSource(String source) {
        this.source = source;
    }

    public String getSource() {
        return this.source;
    }

    public MessageHandler getMessageHandler() {
        return this.handler;
    }

    public Object invoke(MethodInvocation invocation) throws Throwable {
        String method = invocation.getMethod().getName();
        if ("handleMessage".equals(method)) {
            Message<?> message = (Message<?>) invocation.getArguments()[0];
            handleMessage(invocation, message);
            return null;
        }
        return invocation.proceed();
    }

    private void handleMessage(MethodInvocation invocation, Message<?> message) throws Throwable {
        if (logger.isTraceEnabled()) {
            logger.trace("messageHandler(" + this.handler + ") message(" + message + ") :");
        }
        String name = this.name;
        if (name == null) {
            name = this.handler.toString();
        }
        StopWatch timer = new StopWatch(name + ".handle:execution");
        try {
            timer.start();
            this.handleCount.incrementAndGet();
            this.activeCount.incrementAndGet();

            invocation.proceed();

            timer.stop();
            this.duration.append(timer.getTotalTimeMillis());
        } catch (Throwable e) {
            this.errorCount.incrementAndGet();
            throw e;
        } finally {
            this.activeCount.decrementAndGet();
        }
    }

    public synchronized void reset() {
        this.duration.reset();
        this.errorCount.set(0);
        this.handleCount.set(0);
    }

    public int getHandleCount() {
        if (logger.isTraceEnabled()) {
            logger.trace("Getting Handle Count:" + this);
        }
        return this.handleCount.get();
    }

    public int getErrorCount() {
        return this.errorCount.get();
    }

    public double getMeanDuration() {
        return this.duration.getMean();
    }

    public double getMinDuration() {
        return this.duration.getMin();
    }

    public double getMaxDuration() {
        return this.duration.getMax();
    }

    public double getStandardDeviationDuration() {
        return this.duration.getStandardDeviation();
    }

    public int getActiveCount() {
        return this.activeCount.get();
    }

    public Statistics getDuration() {
        return this.duration.getStatistics();
    }

    @Override
    public String toString() {
        return String.format("MessageHandlerMonitor: [name=%s, source=%s, duration=%s]", name, source, duration);
    }

}