/** * 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.sink.kafka; import com.yammer.metrics.core.Counter; import com.yammer.metrics.core.Gauge; import com.yammer.metrics.core.Histogram; import com.yammer.metrics.core.Meter; import com.yammer.metrics.core.Metric; import com.yammer.metrics.core.MetricName; import com.yammer.metrics.core.MetricsRegistry; import com.yammer.metrics.core.Timer; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import java.util.concurrent.TimeUnit; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.spy; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; public class ScheduledReporterTest { private final Gauge gauge = mock(Gauge.class); private final List<Metric> list = new ArrayList<Metric>(); private final MetricsRegistry registry = new MetricsRegistry(); private final ScheduledReporter reporter = spy(new ScheduledReporter(registry, "example", TimeUnit.SECONDS, TimeUnit.MILLISECONDS) { @Override public void report(Set<Entry<MetricName, Metric>> metrics) { // nothing doing! } }); @SuppressWarnings("unchecked") @Before public void setUp() throws Exception { Gauge g = registry.newGauge(System.class, "gauge", gauge); Counter counter = registry.newCounter(System.class, "counter"); Histogram histogram = registry.newHistogram(System.class, "histogram"); Meter meter = registry.newMeter(System.class, "meter", "empty", TimeUnit.MILLISECONDS); Timer timer = registry.newTimer(System.class, "timer"); list.add(g); list.add(counter); list.add(histogram); list.add(meter); list.add(timer); reporter.start(200, TimeUnit.MILLISECONDS); } @After public void tearDown() throws Exception { reporter.stop(); } @Test public void pollsPeriodically() throws Exception { Thread.sleep(500); verify(reporter, times(2)).report(set(list)); } private Set<Entry<MetricName, Metric>> set(List<Metric> metrics) { final Map<MetricName, Metric> map = new HashMap<MetricName, Metric>(); for (Metric metric : metrics) { String name = null; if (metric instanceof Gauge) { name = "gauge"; } else if (metric instanceof Counter) { name = "counter"; } else if (metric instanceof Histogram) { name = "histogram"; } else if (metric instanceof Meter) { name = "meter"; } else if (metric instanceof Timer) { name = "timer"; } map.put(new MetricName(System.class, name), metric); } return map.entrySet(); } }