io.watchcat.node.metrics.LoadAverage.java Source code

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Here is the source code for io.watchcat.node.metrics.LoadAverage.java

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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Thomas Cashman
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package io.watchcat.node.metrics;

import io.watchcat.node.util.ShellCommand;

import java.util.concurrent.atomic.AtomicReference;

import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.springframework.stereotype.Component;

import com.google.common.util.concurrent.AtomicDouble;

/**
 * Gathers the load average and number of CPU cores of the system
 *
 * @author Thomas Cashman
 */
@Component
public class LoadAverage implements Runnable {
    private ShellCommand numberOfCoresPrimaryCommand, numberOfCoresSecondaryCommand;
    private ShellCommand loadAverageCommand;
    private AtomicDouble oneMinuteAverage;
    private AtomicDouble fiveMinuteAverage;
    private AtomicDouble fifteenMinuteAverage;
    private AtomicReference<Integer> numberOfCpuCores;

    public LoadAverage() {
        numberOfCoresPrimaryCommand = new ShellCommand("/bin/grep -c ^processor /proc/cpuinfo");
        numberOfCoresSecondaryCommand = new ShellCommand("/usr/bin/nproc");
        loadAverageCommand = new ShellCommand("/bin/cat /proc/loadavg | /usr/bin/awk '{print $1\",\"$2\",\"$3}'");

        numberOfCpuCores = new AtomicReference<Integer>();
        oneMinuteAverage = new AtomicDouble();
        fiveMinuteAverage = new AtomicDouble();
        fifteenMinuteAverage = new AtomicDouble();
        run();
    }

    @Override
    public void run() {
        String numberOfCoresResult = numberOfCoresPrimaryCommand.execute();
        if (numberOfCoresResult == null || numberOfCoresResult.length() == 0) {
            numberOfCoresResult = numberOfCoresSecondaryCommand.execute();
            if (numberOfCoresResult == null || numberOfCoresResult.length() == 0) {
                numberOfCoresResult = "Unknown";
            }
        }
        numberOfCpuCores.set(Integer.parseInt(numberOfCoresResult.replace("\n", "")));

        String[] loadAverages = loadAverageCommand.execute().split(",");
        oneMinuteAverage.set(Double.parseDouble(loadAverages[0]));
        fiveMinuteAverage.set(Double.parseDouble(loadAverages[1]));
        fifteenMinuteAverage.set(Double.parseDouble(loadAverages[2]));
    }

    public int getNumberOfCpuCores() {
        return numberOfCpuCores.get();
    }

    public double getOneMinuteAverage() {
        return oneMinuteAverage.get();
    }

    public double getFiveMinuteAverage() {
        return fiveMinuteAverage.get();
    }

    public double getFifteenMinuteAverage() {
        return fifteenMinuteAverage.get();
    }

    public void setOneMinuteAverage(double oneMinuteAverage) {
        this.oneMinuteAverage.set(oneMinuteAverage);
    }

    public void setFiveMinuteAverage(double fiveMinuteAverage) {
        this.fiveMinuteAverage.set(fiveMinuteAverage);
    }

    public void setFifteenMinuteAverage(double fifteenMinuteAverage) {
        this.fifteenMinuteAverage.set(fifteenMinuteAverage);
    }

    public XContentBuilder toJson(long timestamp) {
        try {
            XContentBuilder builder = XContentFactory.jsonBuilder();
            builder = builder.startObject();
            builder = builder.field("timestamp", timestamp);
            builder = builder.field("cpuCores", getNumberOfCpuCores());
            builder = builder.field("oneMinuteAverage", getOneMinuteAverage());
            builder = builder.field("fiveMinuteAverage", getFiveMinuteAverage());
            builder = builder.field("fifteenMinuteAverage", getFifteenMinuteAverage());
            builder = builder.endObject();
            return builder;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public String toString() {
        return "LoadAverage [oneMinuteAverage=" + oneMinuteAverage.get() + ", fiveMinuteAverage="
                + fiveMinuteAverage.get() + ", fifteenMinuteAverage=" + fifteenMinuteAverage.get()
                + ", numberOfCpuCores=" + numberOfCpuCores.get() + "]";
    }
}