ModuleZAgetable.java

package jvmmonitor.agent.module;

import jvmmonitor.agent.Util;
import jvmmonitor.agent.monitor.MonitorItem;

/**
 * Created by peiliping on 16-12-21.
 */
public class ModuleZAgetable extends AbstractModule {

    private static String[] AGE_CONS =
            {"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28",
                    "29", "30", "31"};

    private long ageTableSize = 0;

    private long total = 0;

    private long count = 0;

    public ModuleZAgetable(String moduleName, MonitorItem item) {
        super(moduleName, item);
        super.noChangeMetricNames = new String[] {"minorgc", "majorgc"};
        super.metricValuesNum = 3;
        this.ageTableSize = Util.getLongValueFromMonitoredVm(item.getMonitoredVm(), "sun.gc.generation.0.agetable.size", 0);

        if (this.ageTableSize >= 1) {
            super.addMetric(item, "minorgc", "sun.gc.collector.0.invocations");
            super.addMetric(item, "majorgc", "sun.gc.collector.1.invocations");
            for (int i = 0; i < this.ageTableSize - 1; i++) {
                super.addMetric(item, AGE_CONS[i], "sun.gc.generation.0.agetable.bytes." + AGE_CONS[i]);
            }
        } else {
            super.valid = false;
        }
    }

    public void transform(long timestamp) {
        this.total = 0;
        this.count = 0;
        for (int i = 0; i < this.ageTableSize - 1; i++) {
            total = total + (i + 1) * getOriginVal(AGE_CONS[i]);
            count = count + getOriginVal(AGE_CONS[i]);
            super.store(AGE_CONS[i], timestamp, getOriginVal(AGE_CONS[i]), 1L);
        }
        super.store("avg", timestamp, (total * 1000) / (count == 0 ? 1 : count), 1L);
        super.commit();
    }
}