Example usage for org.apache.hadoop.metrics2.lib MutableStat add

Introduction

In this page you can find the example usage for org.apache.hadoop.metrics2.lib MutableStat add.

Prototype

public synchronized void add(long value) 

Source Link

Document

Add a snapshot to the metric

Usage

From source file:org.apache.accumulo.master.metrics.Metrics2ReplicationMetricsTest.java

License:Apache License

@Test
public void testAddReplicationQueueTimeMetrics() throws Exception {
    Master master = EasyMock.createMock(Master.class);
    MetricsSystem system = EasyMock.createMock(MetricsSystem.class);
    VolumeManager fileSystem = EasyMock.createMock(VolumeManager.class);
    ReplicationUtil util = EasyMock.createMock(ReplicationUtil.class);
    MutableStat stat = EasyMock.createMock(MutableStat.class);
    MutableQuantiles quantiles = EasyMock.createMock(MutableQuantiles.class);

    Path path1 = new Path("hdfs://localhost:9000/accumulo/wal/file1");
    Path path2 = new Path("hdfs://localhost:9000/accumulo/wal/file2");

    // First call will initialize the map of paths to modification time
    EasyMock.expect(util.getPendingReplicationPaths()).andReturn(ImmutableSet.of(path1, path2));
    EasyMock.expect(master.getFileSystem()).andReturn(fileSystem);
    EasyMock.expect(fileSystem.getFileStatus(path1)).andReturn(createStatus(100));
    EasyMock.expect(master.getFileSystem()).andReturn(fileSystem);
    EasyMock.expect(fileSystem.getFileStatus(path2)).andReturn(createStatus(200));

    // Second call will recognize the missing path1 and add the latency stat
    EasyMock.expect(util.getPendingReplicationPaths()).andReturn(ImmutableSet.of(path2));

    // Expect a call to reset the min/max
    stat.resetMinMax();/*  ww  w  . j  a v a 2  s.com*/
    EasyMock.expectLastCall();

    // Expect the calls of adding the stats
    quantiles.add(currentTime - 100);
    EasyMock.expectLastCall();

    stat.add(currentTime - 100);
    EasyMock.expectLastCall();

    EasyMock.replay(master, system, fileSystem, util, stat, quantiles);

    Metrics2ReplicationMetrics metrics = new TestMetrics2ReplicationMetrics(master, system);

    // Inject our mock objects
    replaceField(metrics, "replicationUtil", util);
    replaceField(metrics, "replicationQueueTimeQuantiles", quantiles);
    replaceField(metrics, "replicationQueueTimeStat", stat);

    // Two calls to this will initialize the map and then add metrics
    metrics.addReplicationQueueTimeMetrics();
    metrics.addReplicationQueueTimeMetrics();

    EasyMock.verify(master, system, fileSystem, util, stat, quantiles);
}

---