content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.beam.runners.core.metrics;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.is;
  
  import org.apache.beam.sdk.io.GenerateSequence;
  import org.apache.beam.sdk.metrics.Counter;
  import org.apache.beam.sdk.metrics.Metrics;
  import org.apache.beam.sdk.metrics.MetricsOptions;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.testing.UsesAttemptedMetrics;
  import org.apache.beam.sdk.testing.UsesCounterMetrics;
  import org.apache.beam.sdk.testing.UsesMetricsPusher;
  import org.apache.beam.sdk.testing.UsesSystemMetrics;
  import org.apache.beam.sdk.testing.ValidatesRunner;
  import org.apache.beam.sdk.transforms.DoFn;
  import org.apache.beam.sdk.transforms.ParDo;
  import org.joda.time.Duration;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /** A test that verifies that metrics push system works. */
  @Category({UsesMetricsPusher.class, ValidatesRunner.class})
  @RunWith(JUnit4.class)
  public class MetricsPusherTest {
    private static final Logger LOG = LoggerFactory.getLogger(MetricsPusherTest.class);
  
    private static final long NUM_ELEMENTS = 1000L;
    private static final String COUNTER_NAME = "counter";
    @Rule public final TestPipeline pipeline = TestPipeline.create();
  
    @Before
    public void init() {
      MetricsOptions options = pipeline.getOptions().as(MetricsOptions.class);
      options.setMetricsSink(TestMetricsSink.class);
    }
  
    @Category({ValidatesRunner.class, UsesAttemptedMetrics.class, UsesCounterMetrics.class})
    @Test
    public void pushesUserMetrics() throws Exception {
      TestMetricsSink.clear();
      pipeline
          .apply(
              // Use maxReadTime to force unbounded mode.
              GenerateSequence.from(0).to(NUM_ELEMENTS).withMaxReadTime(Duration.standardDays(1)))
          .apply(ParDo.of(new CountingDoFn()));
      pipeline.run();
      // give metrics pusher time to push
      Thread.sleep(
          (pipeline.getOptions().as(MetricsOptions.class).getMetricsPushPeriod() + 1L) * 1000);
      assertThat(TestMetricsSink.getCounterValue(COUNTER_NAME), is(NUM_ELEMENTS));
    }
  
    @Category({
      ValidatesRunner.class,
      UsesAttemptedMetrics.class,
      UsesCounterMetrics.class,
      UsesSystemMetrics.class
    })
    @Test
    public void pushesSystemMetrics() throws InterruptedException {
      TestMetricsSink.clear();
      pipeline
          .apply(
              // Use maxReadTime to force unbounded mode.
              GenerateSequence.from(0).to(NUM_ELEMENTS).withMaxReadTime(Duration.standardDays(1)))
          .apply(ParDo.of(new CountingDoFn()));
      pipeline.run();
      // give metrics pusher time to push
      Thread.sleep(
          (pipeline.getOptions().as(MetricsOptions.class).getMetricsPushPeriod() + 1L) * 1000);
      assertThat(TestMetricsSink.getSystemCounters().isEmpty(), is(false));
    }
  
    private static class CountingDoFn extends DoFn<Long, Long> {
      private final Counter counter = Metrics.counter(MetricsPusherTest.class, COUNTER_NAME);
  
      @ProcessElement
      public void processElement(ProcessContext context) {
        try {
          counter.inc();
          context.output(context.element());
        } catch (Exception e) {
          LOG.error("Suppressed Exception.", e);
        }
      }
    }
  }
  