io.watchcat.node.monitoring.DiskMonitor.java Source code

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Here is the source code for io.watchcat.node.monitoring.DiskMonitor.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.monitoring;

import io.watchcat.node.alerts.AlertSender;
import io.watchcat.node.event.Criticality;
import io.watchcat.node.event.CriticalityEvent;
import io.watchcat.node.event.DiskUsageEvent;
import io.watchcat.node.metrics.DiskUsage;
import io.watchcat.node.metrics.domain.Disk;
import io.watchcat.node.monitoring.threshold.DiskThresholds;
import io.watchcat.node.reporting.LinuxMetricsCollector;

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * Monitors {@link Disk} disk space usage
 *
 * @author Thomas Cashman
 */
@Component
public class DiskMonitor implements Runnable {
    public static final int INTERVAL = 5;

    @Autowired
    private LinuxMetricsCollector metricsCollector;
    @Autowired
    private ScheduledExecutorService scheduledExecutorService;
    @Autowired
    private DiskThresholds diskThresholds;
    @Autowired
    private AlertSender alertSender;

    private Map<String, CriticalityEvent> diskUsageEvents;

    public DiskMonitor() {
        diskUsageEvents = new ConcurrentHashMap<String, CriticalityEvent>();
    }

    @PostConstruct
    public void postConstruct() {
        scheduledExecutorService.schedule(this, INTERVAL + 1, TimeUnit.SECONDS);
    }

    @Override
    public void run() {
        try {
            DiskUsage diskUsage = metricsCollector.getDiskUsage();

            List<Disk> disks = diskUsage.getDisks();
            Iterator<Disk> iterator = disks.iterator();
            while (iterator.hasNext()) {
                Disk disk = iterator.next();
                String key = disk.getDisk();
                if (key.compareToIgnoreCase("none") == 0) {
                    continue;
                }

                CriticalityEvent existingEvent = diskUsageEvents.get(key);

                if (disk.getPercentageUsed() >= diskThresholds.getCriticalThreshold()) {
                    if (existingEvent == null) {
                        beginEvent(key, Criticality.CRITICAL, disk.getPercentageUsed());
                    } else {
                        existingEvent.updateStatus(Criticality.CRITICAL, String.valueOf(disk.getPercentageUsed()));
                    }
                } else if (disk.getPercentageUsed() >= diskThresholds.getMajorThreshold()) {
                    if (existingEvent == null) {
                        beginEvent(key, Criticality.MAJOR, disk.getPercentageUsed());
                    } else {
                        existingEvent.updateStatus(Criticality.MAJOR, String.valueOf(disk.getPercentageUsed()));
                    }
                } else if (disk.getPercentageUsed() >= diskThresholds.getMinorThreshold()) {
                    if (existingEvent == null) {
                        beginEvent(key, Criticality.MINOR, disk.getPercentageUsed());
                    } else {
                        existingEvent.updateStatus(Criticality.MINOR, String.valueOf(disk.getPercentageUsed()));
                    }
                } else {
                    if (existingEvent != null) {
                        existingEvent.end();
                        diskUsageEvents.remove(key);
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        scheduledExecutorService.schedule(this, 5, TimeUnit.SECONDS);
    }

    private void beginEvent(String filesystem, Criticality criticality, int percentageUsed) {
        DiskUsageEvent event = new DiskUsageEvent(alertSender, filesystem);
        event.begin(criticality, String.valueOf(percentageUsed));
        diskUsageEvents.put(filesystem, event);
    }

    protected CriticalityEvent getDiskUsageEvent(String disk) {
        return diskUsageEvents.get(disk);
    }

    protected void setDiskUsageEvent(String disk, CriticalityEvent event) {
        diskUsageEvents.put(disk, event);
    }

    protected void setMetricsCollector(LinuxMetricsCollector metricsCollector) {
        this.metricsCollector = metricsCollector;
    }

    protected void setScheduledExecutorService(ScheduledExecutorService scheduledExecutorService) {
        this.scheduledExecutorService = scheduledExecutorService;
    }

    protected void setDiskThresholds(DiskThresholds diskThresholds) {
        this.diskThresholds = diskThresholds;
    }

    protected void setAlertSender(AlertSender alertSender) {
        this.alertSender = alertSender;
    }
}