/**
* 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 com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import org.apache.hadoop.metrics2.AbstractMetric;
import org.apache.hadoop.metrics2.MetricsRecord;
import org.apache.hadoop.metrics2.MetricsTag;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
/**
* Utility class mainly for tests
*/
public class MetricsRecords {
public static void assertTag(MetricsRecord record, String tagName,
String expectedValue) {
MetricsTag processIdTag = getFirstTagByName(record,
tagName);
assertNotNull(processIdTag);
assertEquals(expectedValue, processIdTag.value());
}
public static void assertMetric(MetricsRecord record,
String metricName,
Number expectedValue) {
AbstractMetric resourceLimitMetric = getFirstMetricByName(
record, metricName);
assertNotNull(resourceLimitMetric);
assertEquals(expectedValue, resourceLimitMetric.value());
}
private static MetricsTag getFirstTagByName(MetricsRecord record, String name) {
return Iterables.getFirst(Iterables.filter(record.tags(),
new MetricsTagPredicate(name)), null);
}
private static AbstractMetric getFirstMetricByName(
MetricsRecord record, String name) {
return Iterables.getFirst(
Iterables.filter(record.metrics(), new AbstractMetricPredicate(name)),
null);
}
private static class MetricsTagPredicate implements Predicate<MetricsTag> {
private String tagName;
public MetricsTagPredicate(String tagName) {
this.tagName = tagName;
}
@Override
public boolean apply(MetricsTag input) {
return input.name().equals(tagName);
}
}
private static class AbstractMetricPredicate
implements Predicate<AbstractMetric> {
private String metricName;
public AbstractMetricPredicate(
String metricName) {
this.metricName = metricName;
}
@Override
public boolean apply(AbstractMetric input) {
return input.name().equals(metricName);
}
}
}