| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hdds.server.http; |
| |
| import java.io.IOException; |
| import java.io.StringWriter; |
| import java.util.concurrent.TimeUnit; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import io.prometheus.client.CollectorRegistry; |
| import io.prometheus.client.exporter.common.TextFormat; |
| import org.apache.ratis.protocol.RaftGroupId; |
| import org.apache.ratis.protocol.RaftGroupMemberId; |
| import org.apache.ratis.protocol.RaftPeerId; |
| import org.apache.ratis.server.metrics.SegmentedRaftLogMetrics; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Test RatisDropwizardRexporter. |
| */ |
| public class TestRatisDropwizardExports { |
| |
| @Test |
| public void export() throws IOException { |
| //create Ratis metrics |
| SegmentedRaftLogMetrics instance = new SegmentedRaftLogMetrics( |
| RaftGroupMemberId.valueOf( |
| RaftPeerId.valueOf("peerId"), RaftGroupId.randomId())); |
| instance.getRaftLogSyncTimer().update(10, TimeUnit.MILLISECONDS); |
| MetricRegistry dropWizardMetricRegistry = |
| instance.getRegistry().getDropWizardMetricRegistry(); |
| |
| //create and register prometheus collector |
| RatisDropwizardExports exports = |
| new RatisDropwizardExports(dropWizardMetricRegistry); |
| |
| CollectorRegistry collector = new CollectorRegistry(); |
| collector.register(new RatisDropwizardExports(dropWizardMetricRegistry)); |
| |
| //export metrics to the string |
| StringWriter writer = new StringWriter(); |
| TextFormat.write004(writer, collector.metricFamilySamples()); |
| |
| System.out.println(writer.toString()); |
| |
| Assert.assertFalse("Instance name is not moved to be a tag", |
| writer.toString() |
| .contains("ratis_core_ratis_log_worker_instance_syncTime")); |
| |
| } |
| |
| } |