AbstractJmxPerformanceCounter.java

/*
 * ApplicationInsights-Java
 * Copyright (c) Microsoft Corporation
 * All rights reserved.
 *
 * MIT License
 * 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
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 * DEALINGS IN THE SOFTWARE.
 */

package com.microsoft.applicationinsights.internal.perfcounter;

import java.util.Collection;
import java.util.Map;

import com.microsoft.applicationinsights.TelemetryClient;
import com.microsoft.applicationinsights.internal.jmx.JmxAttributeData;
import com.microsoft.applicationinsights.internal.jmx.JmxDataFetcher;
import com.microsoft.applicationinsights.internal.logger.InternalLogger;

/**
 * The class is a base class for JMX performance counters.
 * It knows how to fetch the needed information from JMX and then relies on its derived classes to send the data.
 *
 * Created by gupele on 3/15/2015.
 */
public abstract class AbstractJmxPerformanceCounter implements PerformanceCounter {
    private final String id;
    private final String objectName;
    private final Collection<JmxAttributeData> attributes;
    private boolean relevant = true;
    private boolean firstTime = true;

    @Override
    public String getId() {
        return id;
    }

    /**
     * The main method. The method will fetch the data and send it.
     * The method will not do anything if there was a major problem accessing the needed counter.
     * @param telemetryClient The telemetry client to send events.
     */
    @Override
    public synchronized void report(TelemetryClient telemetryClient) {
        if (!relevant) {
            return;
        }

        try {
            Map<String, Collection<Object>> result =
                    JmxDataFetcher.fetch(objectName, attributes);

            for (Map.Entry<String, Collection<Object>> displayAndValues : result.entrySet()) {
                boolean ok = true;
                double value = 0.0;
                for (Object obj : displayAndValues.getValue()) {
                    try {
                        value += Double.parseDouble(String.valueOf(obj));
                    } catch (Exception e) {
                        ok = false;
                        break;
                    }
                }

                if (ok) {
                    try {
                        send(telemetryClient, displayAndValues.getKey(), value);
                    } catch (Exception e) {
                        InternalLogger.INSTANCE.error("Error while sending JMX data: '%s'", e.getMessage());
                    }
                }
            }
        } catch (Exception e) {
            if (firstTime) {
                InternalLogger.INSTANCE.error("Error while fetching JMX data: '%s', The PC will be ignored", e.getMessage());
                relevant = false;
            } else {
                InternalLogger.INSTANCE.error("Error while fetching JMX data: '%s'", e.getMessage());
            }
        } finally {
            firstTime = false;
        }
    }

    protected AbstractJmxPerformanceCounter(String id, String objectName, Collection<JmxAttributeData> attributes) {
        this.id = id;
        this.objectName = objectName;
        this.attributes = attributes;
    }

    protected abstract void send(TelemetryClient telemetryClient, String displayName, double value);
}