common/src/test/core/org/apache/hadoop/metrics2/impl/TestMetricsCollectorImpl.java

/**
 * 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.hadoop.metrics2.impl;

import org.junit.Test;
import static org.junit.Assert.*;

import org.apache.commons.configuration.SubsetConfiguration;
import static org.apache.hadoop.metrics2.filter.TestPatternFilter.*;
import static org.apache.hadoop.metrics2.lib.Interns.*;

public class TestMetricsCollectorImpl {

  @Test public void recordBuilderShouldNoOpIfFiltered() {
    SubsetConfiguration fc = new ConfigBuilder()
        .add("p.exclude", "foo").subset("p");
    MetricsCollectorImpl mb = new MetricsCollectorImpl();
    mb.setRecordFilter(newGlobFilter(fc));
    MetricsRecordBuilderImpl rb = mb.addRecord("foo");
    rb.tag(info("foo", ""), "value").addGauge(info("g0", ""), 1);
    assertEquals("no tags", 0, rb.tags().size());
    assertEquals("no metrics", 0, rb.metrics().size());
    assertNull("null record", rb.getRecord());
    assertEquals("no records", 0, mb.getRecords().size());
  }

  @Test public void testPerMetricFiltering() {
    SubsetConfiguration fc = new ConfigBuilder()
        .add("p.exclude", "foo").subset("p");
    MetricsCollectorImpl mb = new MetricsCollectorImpl();
    mb.setMetricFilter(newGlobFilter(fc));
    MetricsRecordBuilderImpl rb = mb.addRecord("foo");
    rb.tag(info("foo", ""), "").addCounter(info("c0", ""), 0)
      .addGauge(info("foo", ""), 1);
    assertEquals("1 tag", 1, rb.tags().size());
    assertEquals("1 metric", 1, rb.metrics().size());
    assertEquals("expect foo tag", "foo", rb.tags().get(0).name());
    assertEquals("expect c0", "c0", rb.metrics().get(0).name());
  }
}