content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.throttle;
  
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.metrics.MetricKey;
  import alluxio.metrics.MetricsSystem;
  import alluxio.util.JvmPauseMonitor;
  
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  import java.nio.ByteBuffer;
  
  /**
   * The indicators test.
   */
  public class IndicatorsTests {
    private static final JvmPauseMonitor JVM_PAUSE_MONITOR = new JvmPauseMonitor(
        Configuration.getMs(PropertyKey.JVM_MONITOR_SLEEP_INTERVAL_MS),
        Configuration.getMs(PropertyKey.JVM_MONITOR_WARN_THRESHOLD_MS),
        Configuration.getMs(PropertyKey.JVM_MONITOR_INFO_THRESHOLD_MS));
  
    @Before
    public void before() {
      Configuration.set(PropertyKey.MASTER_JVM_MONITOR_ENABLED, true);
      JVM_PAUSE_MONITOR.start();
      MetricsSystem.registerGaugeIfAbsent(
          MetricsSystem.getMetricName(MetricKey.TOTAL_EXTRA_TIME.getName()),
          JVM_PAUSE_MONITOR::getTotalExtraTime);
      MetricsSystem.registerGaugeIfAbsent(
          MetricsSystem.getMetricName(MetricKey.INFO_TIME_EXCEEDED.getName()),
          JVM_PAUSE_MONITOR::getInfoTimeExceeded);
      MetricsSystem.registerGaugeIfAbsent(
          MetricsSystem.getMetricName(MetricKey.WARN_TIME_EXCEEDED.getName()),
          JVM_PAUSE_MONITOR::getWarnTimeExceeded);
    }
  
    @After
    public void after() {
      JVM_PAUSE_MONITOR.stop();
    }
  
    @Test
    public void basicIndicatorCreationTest() throws InterruptedException {
      int directMemSize = 101;
      ByteBuffer.allocateDirect(directMemSize);
      long baseSize = MetricsSystem.getDirectMemUsed();
      ByteBuffer.allocateDirect(directMemSize);
      ServerIndicator serverIndicator1
          = ServerIndicator.createFromMetrics(0);
      Thread.sleep(2000);
      Assert.assertEquals(directMemSize + baseSize, serverIndicator1.getDirectMemUsed());
      ServerIndicator serverIndicator2
          = ServerIndicator.createFromMetrics(0);
      Assert.assertEquals(directMemSize + baseSize, serverIndicator2.getDirectMemUsed());
      Assert.assertEquals(true, serverIndicator1.getPitTimeMS()
          < serverIndicator2.getPitTimeMS());
      Assert.assertEquals(true, serverIndicator1.getTotalJVMPauseTimeMS()
          <= serverIndicator2.getTotalJVMPauseTimeMS());
      Assert.assertEquals(serverIndicator1.getDirectMemUsed(), serverIndicator2.getDirectMemUsed());
      Assert.assertEquals(serverIndicator1.getHeapMax(), serverIndicator2.getHeapMax());
      Assert.assertEquals(serverIndicator1.getRpcQueueSize(), serverIndicator2.getRpcQueueSize());
    }
  
    @Test
    public void basicIndicatorComparisonTest() throws InterruptedException {
      long directMemUsed = 8;
      long nettyDirectMemUsed = 8;
      long headMax = 1000;
      long headUsed = 800;
      double cpuLoad = 0.3;
      long totalJVMPauseTimeMS = 200;
      long pitTotalJVMPauseTime = 30;
      long rpcQueueSize = 50;
      long snapshotTimeMS = 33;
      ServerIndicator serverIndicator =
          new ServerIndicator(directMemUsed, headMax, headUsed, cpuLoad, totalJVMPauseTimeMS,
              pitTotalJVMPauseTime, rpcQueueSize, snapshotTimeMS, nettyDirectMemUsed);
  
      int times = 3;
      ServerIndicator serverIndicatorM = new ServerIndicator(serverIndicator, times);
      Assert.assertEquals(serverIndicatorM.getHeapUsed(),
          (serverIndicator.getHeapUsed() * times));
      Assert.assertEquals(serverIndicatorM.getCpuLoad(),
          (serverIndicator.getCpuLoad() * times), 0.0000001);
      Assert.assertEquals(serverIndicatorM.getDirectMemUsed(),
          (serverIndicator.getDirectMemUsed() * times));
      Assert.assertEquals(serverIndicatorM.getNettyDirectMemUsed(),
          (serverIndicator.getNettyDirectMemUsed() * times));
      Assert.assertEquals(serverIndicatorM.getTotalJVMPauseTimeMS(),
          (serverIndicator.getTotalJVMPauseTimeMS() * times));
      Assert.assertEquals(serverIndicatorM.getRpcQueueSize(),
          (serverIndicator.getRpcQueueSize() * times));
  
      long baseDeltaLong = 4;
      double baseDeltaDouble = 0.1;
      long deltaLong = baseDeltaLong;
      double deltaDouble = baseDeltaDouble;
      ServerIndicator serverIndicator1Delta = new ServerIndicator(directMemUsed + deltaLong,
          headMax,
          headUsed + deltaLong, cpuLoad + deltaDouble,
          totalJVMPauseTimeMS + deltaLong, pitTotalJVMPauseTime + deltaLong,
          rpcQueueSize + deltaLong, snapshotTimeMS, nettyDirectMemUsed + deltaLong);
  
      ServerIndicator deltaIndicator = new ServerIndicator(serverIndicator1Delta);
      deltaIndicator.reduction(serverIndicator);
      Assert.assertEquals(deltaLong, deltaIndicator.getRpcQueueSize());
      Assert.assertEquals(deltaDouble, deltaIndicator.getCpuLoad(), 0.00001);
      Assert.assertEquals(deltaLong, deltaIndicator.getDirectMemUsed());
      Assert.assertEquals(deltaLong, deltaIndicator.getNettyDirectMemUsed());
      Assert.assertEquals(deltaLong, deltaIndicator.getHeapUsed());
      Assert.assertEquals(deltaLong, deltaIndicator.getTotalJVMPauseTimeMS());
  
      deltaDouble += deltaDouble;
      deltaLong += deltaLong;
      ServerIndicator serverIndicator2Delta = new ServerIndicator(directMemUsed + deltaLong,
          headMax,
          headUsed + deltaLong, cpuLoad + deltaDouble,
          totalJVMPauseTimeMS + deltaLong, pitTotalJVMPauseTime + deltaLong,
          rpcQueueSize + deltaLong, snapshotTimeMS, nettyDirectMemUsed + deltaLong);
      deltaIndicator = new ServerIndicator(serverIndicator2Delta);
      deltaIndicator.reduction(serverIndicator);
      Assert.assertEquals(deltaIndicator.getRpcQueueSize(), deltaLong);
      Assert.assertEquals(deltaIndicator.getCpuLoad(), deltaDouble, 0.00001);
      Assert.assertEquals(deltaIndicator.getDirectMemUsed(), deltaLong);
      Assert.assertEquals(deltaIndicator.getNettyDirectMemUsed(), deltaLong);
      Assert.assertEquals(deltaIndicator.getHeapUsed(), deltaLong);
      Assert.assertEquals(deltaIndicator.getTotalJVMPauseTimeMS(), deltaLong);
  
      ServerIndicator serverAgg = new ServerIndicator(serverIndicator);
      serverAgg.addition(serverIndicator);
      serverAgg.addition(serverIndicator);
      serverAgg.reduction(serverIndicator);
      int aggTimes = 2;
      Assert.assertEquals(aggTimes * serverIndicator.getRpcQueueSize(), serverAgg.getRpcQueueSize());
      Assert.assertEquals(aggTimes * serverIndicator.getDirectMemUsed(),
          serverAgg.getDirectMemUsed());
      Assert.assertEquals(aggTimes * serverIndicator.getNettyDirectMemUsed(),
          serverAgg.getNettyDirectMemUsed());
      Assert.assertEquals(aggTimes * serverIndicator.getHeapUsed(), serverAgg.getHeapUsed());
      Assert.assertEquals(aggTimes * serverIndicator.getTotalJVMPauseTimeMS(),
          serverAgg.getTotalJVMPauseTimeMS());
      Assert.assertEquals(aggTimes * serverIndicator.getCpuLoad(),
          serverAgg.getCpuLoad(), 0.00001);
    }
  }
  
  