MultiAssignableMetricTest.java

// Copyright 2016 Twitter. All rights reserved.
//
// Licensed 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 com.twitter.heron.metrics;

import java.util.Map;

import org.junit.Assert;
import org.junit.Test;

import com.twitter.heron.api.metric.MultiAssignableMetric;

/**
 * Test for MultiAssignableMetric
 */
public class MultiAssignableMetricTest {
  @Test
  public void testMultiAssignableMetrics() {
    MultiAssignableMetric<Integer> multiAssignableMetric = new MultiAssignableMetric<>(0);
    multiAssignableMetric.scope("metric_a").setValue(100);
    multiAssignableMetric.scope("metric_b").setValue(200);

    Map<String, Integer> ret = multiAssignableMetric.getValueAndReset();
    Assert.assertEquals(ret.get("metric_a"), new Integer(100));
    Assert.assertEquals(ret.get("metric_b"), new Integer(200));

    // Re-assign by synchronized safeScope
    multiAssignableMetric.safeScope("metric_a").setValue(300);
    multiAssignableMetric.safeScope("metric_b").setValue(400);

    ret = multiAssignableMetric.getValueAndReset();
    Assert.assertEquals(ret.get("metric_a"), new Integer(300));
    Assert.assertEquals(ret.get("metric_b"), new Integer(400));
  }


}