Examples with MetricsRecord com.google.cloud.spanner.MetricRegistryTestUtils.MetricsRecord used on opensource projects

Example 1 with MetricsRecord

use of com.google.cloud.spanner.MetricRegistryTestUtils.MetricsRecord in project java-spanner by googleapis.

the class SessionPoolTest method testSessionMetrics.

@Test
public void testSessionMetrics() throws Exception {
    // Create a session pool with max 2 session and a low timeout for waiting for a session.
    options = SessionPoolOptions.newBuilder().setMinSessions(1).setMaxSessions(2).setMaxIdleSessions(0).setInitialWaitForSessionTimeoutMillis(50L).build();
    FakeClock clock = new FakeClock();
    clock.currentTimeMillis = System.currentTimeMillis();
    FakeMetricRegistry metricRegistry = new FakeMetricRegistry();
    List<LabelValue> labelValues = Arrays.asList(LabelValue.create("client1"), LabelValue.create("database1"), LabelValue.create("instance1"), LabelValue.create("1.0.0"));
    setupMockSessionCreation();
    pool = createPool(clock, metricRegistry, labelValues);
    PooledSessionFuture session1 = pool.getSession();
    PooledSessionFuture session2 = pool.getSession();
    session1.get();
    session2.get();
    MetricsRecord record = metricRegistry.pollRecord();
    assertThat(record.getMetrics().size()).isEqualTo(6);
    List<PointWithFunction> maxInUseSessions = record.getMetrics().get(MetricRegistryConstants.MAX_IN_USE_SESSIONS);
    assertThat(maxInUseSessions.size()).isEqualTo(1);
    assertThat(maxInUseSessions.get(0).value()).isEqualTo(2L);
    assertThat(maxInUseSessions.get(0).keys()).isEqualTo(SPANNER_LABEL_KEYS);
    assertThat(maxInUseSessions.get(0).values()).isEqualTo(labelValues);
    List<PointWithFunction> getSessionsTimeouts = record.getMetrics().get(MetricRegistryConstants.GET_SESSION_TIMEOUTS);
    assertThat(getSessionsTimeouts.size()).isEqualTo(1);
    assertThat(getSessionsTimeouts.get(0).value()).isAtMost(1L);
    assertThat(getSessionsTimeouts.get(0).keys()).isEqualTo(SPANNER_LABEL_KEYS);
    assertThat(getSessionsTimeouts.get(0).values()).isEqualTo(labelValues);
    List<PointWithFunction> numAcquiredSessions = record.getMetrics().get(MetricRegistryConstants.NUM_ACQUIRED_SESSIONS);
    assertThat(numAcquiredSessions.size()).isEqualTo(1);
    assertThat(numAcquiredSessions.get(0).value()).isEqualTo(2L);
    assertThat(numAcquiredSessions.get(0).keys()).isEqualTo(SPANNER_LABEL_KEYS);
    assertThat(numAcquiredSessions.get(0).values()).isEqualTo(labelValues);
    List<PointWithFunction> numReleasedSessions = record.getMetrics().get(MetricRegistryConstants.NUM_RELEASED_SESSIONS);
    assertThat(numReleasedSessions.size()).isEqualTo(1);
    assertThat(numReleasedSessions.get(0).value()).isEqualTo(0);
    assertThat(numReleasedSessions.get(0).keys()).isEqualTo(SPANNER_LABEL_KEYS);
    assertThat(numReleasedSessions.get(0).values()).isEqualTo(labelValues);
    List<PointWithFunction> maxAllowedSessions = record.getMetrics().get(MetricRegistryConstants.MAX_ALLOWED_SESSIONS);
    assertThat(maxAllowedSessions.size()).isEqualTo(1);
    assertThat(maxAllowedSessions.get(0).value()).isEqualTo(options.getMaxSessions());
    assertThat(maxAllowedSessions.get(0).keys()).isEqualTo(SPANNER_LABEL_KEYS);
    assertThat(maxAllowedSessions.get(0).values()).isEqualTo(labelValues);
    List<PointWithFunction> numSessionsInPool = record.getMetrics().get(MetricRegistryConstants.NUM_SESSIONS_IN_POOL);
    assertThat(numSessionsInPool.size()).isEqualTo(4);
    PointWithFunction beingPrepared = numSessionsInPool.get(0);
    List<LabelValue> labelValuesWithBeingPreparedType = new ArrayList<>(labelValues);
    labelValuesWithBeingPreparedType.add(NUM_SESSIONS_BEING_PREPARED);
    assertThat(beingPrepared.value()).isEqualTo(0L);
    assertThat(beingPrepared.keys()).isEqualTo(SPANNER_LABEL_KEYS_WITH_TYPE);
    assertThat(beingPrepared.values()).isEqualTo(labelValuesWithBeingPreparedType);
    PointWithFunction numSessionsInUse = numSessionsInPool.get(1);
    List<LabelValue> labelValuesWithInUseType = new ArrayList<>(labelValues);
    labelValuesWithInUseType.add(NUM_IN_USE_SESSIONS);
    assertThat(numSessionsInUse.value()).isEqualTo(2L);
    assertThat(numSessionsInUse.keys()).isEqualTo(SPANNER_LABEL_KEYS_WITH_TYPE);
    assertThat(numSessionsInUse.values()).isEqualTo(labelValuesWithInUseType);
    PointWithFunction readSessions = numSessionsInPool.get(2);
    List<LabelValue> labelValuesWithReadType = new ArrayList<>(labelValues);
    labelValuesWithReadType.add(NUM_READ_SESSIONS);
    assertThat(readSessions.value()).isEqualTo(0L);
    assertThat(readSessions.keys()).isEqualTo(SPANNER_LABEL_KEYS_WITH_TYPE);
    assertThat(readSessions.values()).isEqualTo(labelValuesWithReadType);
    PointWithFunction writePreparedSessions = numSessionsInPool.get(3);
    List<LabelValue> labelValuesWithWriteType = new ArrayList<>(labelValues);
    labelValuesWithWriteType.add(NUM_WRITE_SESSIONS);
    assertThat(writePreparedSessions.value()).isEqualTo(0L);
    assertThat(writePreparedSessions.keys()).isEqualTo(SPANNER_LABEL_KEYS_WITH_TYPE);
    assertThat(writePreparedSessions.values()).isEqualTo(labelValuesWithWriteType);
    final CountDownLatch latch = new CountDownLatch(1);
    // Try asynchronously to take another session. This attempt should time out.
    Future<Void> fut = executor.submit(() -> {
        latch.countDown();
        Session session = pool.getSession();
        session.close();
        return null;
    });
    // Wait until the background thread is actually waiting for a session.
    latch.await();
    // Wait until the request has timed out.
    int waitCount = 0;
    while (pool.getNumWaiterTimeouts() == 0L && waitCount < 1000) {
        Thread.sleep(5L);
        waitCount++;
    }
    // Return the checked out session to the pool so the async request will get a session and
    // finish.
    session2.close();
    // Verify that the async request also succeeds.
    fut.get(10L, TimeUnit.SECONDS);
    executor.shutdown();
    session1.close();
    numAcquiredSessions = record.getMetrics().get(MetricRegistryConstants.NUM_ACQUIRED_SESSIONS);
    assertThat(numAcquiredSessions.size()).isEqualTo(1);
    assertThat(numAcquiredSessions.get(0).value()).isEqualTo(3L);
    numReleasedSessions = record.getMetrics().get(MetricRegistryConstants.NUM_RELEASED_SESSIONS);
    assertThat(numReleasedSessions.size()).isEqualTo(1);
    assertThat(numReleasedSessions.get(0).value()).isEqualTo(3L);
    maxInUseSessions = record.getMetrics().get(MetricRegistryConstants.MAX_IN_USE_SESSIONS);
    assertThat(maxInUseSessions.size()).isEqualTo(1);
    assertThat(maxInUseSessions.get(0).value()).isEqualTo(2L);
    numSessionsInPool = record.getMetrics().get(MetricRegistryConstants.NUM_SESSIONS_IN_POOL);
    assertThat(numSessionsInPool.size()).isEqualTo(4);
    beingPrepared = numSessionsInPool.get(0);
    assertThat(beingPrepared.value()).isEqualTo(0L);
    numSessionsInUse = numSessionsInPool.get(1);
    assertThat(numSessionsInUse.value()).isEqualTo(0L);
    readSessions = numSessionsInPool.get(2);
    assertThat(readSessions.value()).isEqualTo(2L);
    writePreparedSessions = numSessionsInPool.get(3);
    assertThat(writePreparedSessions.value()).isEqualTo(0L);
}