com.linkedin.kmf.services.StatsdMetricsReporterService.java Source code

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Here is the source code for com.linkedin.kmf.services.StatsdMetricsReporterService.java

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/**
 * Copyright 2016 LinkedIn Corp. 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.
 */
package com.linkedin.kmf.services;

import com.linkedin.kmf.common.MbeanAttributeValue;
import com.linkedin.kmf.services.configs.StatsdMetricsReporterServiceConfig;
import com.timgroup.statsd.NonBlockingStatsDClient;
import com.timgroup.statsd.StatsDClient;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import static com.linkedin.kmf.common.Utils.getMBeanAttributeValues;

public class StatsdMetricsReporterService implements Service {
    private static final Logger LOG = LoggerFactory.getLogger(StatsdMetricsReporterService.class);

    private final String _name;
    private final List<String> _metricNames;
    private final int _reportIntervalSec;
    private final ScheduledExecutorService _executor;
    private final StatsDClient _statsdClient;

    public StatsdMetricsReporterService(Map<String, Object> props, String name) {
        StatsdMetricsReporterServiceConfig config = new StatsdMetricsReporterServiceConfig(props);

        _name = name;
        _metricNames = config.getList(StatsdMetricsReporterServiceConfig.REPORT_METRICS_CONFIG);
        _reportIntervalSec = config.getInt(StatsdMetricsReporterServiceConfig.REPORT_INTERVAL_SEC_CONFIG);
        _executor = Executors.newSingleThreadScheduledExecutor();
        _statsdClient = new NonBlockingStatsDClient(
                config.getString(StatsdMetricsReporterServiceConfig.REPORT_STATSD_PREFIX),
                config.getString(StatsdMetricsReporterServiceConfig.REPORT_STATSD_HOST),
                config.getInt(StatsdMetricsReporterServiceConfig.REPORT_STATSD_PORT));
    }

    @Override
    public synchronized void start() {
        _executor.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                try {
                    reportMetrics();
                } catch (Exception e) {
                    LOG.error(_name + "/StatsdMetricsReporterService failed to report metrics", e);
                }
            }
        }, _reportIntervalSec, _reportIntervalSec, TimeUnit.SECONDS);
        LOG.info("{}/StatsdMetricsReporterService started", _name);
    }

    @Override
    public synchronized void stop() {
        _executor.shutdown();
        LOG.info("{}/StatsdMetricsReporterService stopped", _name);
    }

    @Override
    public boolean isRunning() {
        return !_executor.isShutdown();
    }

    @Override
    public void awaitShutdown() {
        try {
            _executor.awaitTermination(Integer.MAX_VALUE, TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
            LOG.info("Thread interrupted when waiting for {}/StatsdMetricsReporterService to shutdown", _name);
        }
        LOG.info("{}/StatsdMetricsReporterService shutdown completed", _name);
    }

    private String generateStatsdMetricName(String bean, String attribute) {
        String service = bean.split(":")[1];
        String serviceName = service.split(",")[0].split("=")[1];
        String serviceType = service.split(",")[1].split("=")[1];
        String[] segs = { serviceType, serviceName, attribute };
        return StringUtils.join(segs, ".");
    }

    private void reportMetrics() {
        for (String metricName : _metricNames) {
            String mbeanExpr = metricName.substring(0, metricName.lastIndexOf(":"));
            String attributeExpr = metricName.substring(metricName.lastIndexOf(":") + 1);
            List<MbeanAttributeValue> attributeValues = getMBeanAttributeValues(mbeanExpr, attributeExpr);

            for (MbeanAttributeValue attributeValue : attributeValues) {
                final String statsdMetricName = generateStatsdMetricName(attributeValue.mbean(),
                        attributeValue.attribute());
                _statsdClient.recordGaugeValue(statsdMetricName, new Double(attributeValue.value()).longValue());
            }
        }
    }
}