| /** |
| * 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.hbase.master.balancer; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.util.Random; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.MiniHBaseCluster; |
| import org.apache.hadoop.hbase.master.HMaster; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.metrics2.MetricsSource; |
| import org.apache.hadoop.metrics2.MetricsTag; |
| import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Category({ MediumTests.class }) |
| public class TestBalancerStatusTagInJMXMetrics extends BalancerTestBase { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestBalancerStatusTagInJMXMetrics.class); |
| |
| private static final Logger LOG = LoggerFactory.getLogger(TestBalancerStatusTagInJMXMetrics.class); |
| private static HBaseTestingUtility UTIL = new HBaseTestingUtility(); |
| private static int connectorPort = 61120; |
| private static HMaster master; |
| private static MiniHBaseCluster cluster; |
| private static Configuration conf = null; |
| |
| /** |
| * Setup the environment for the test. |
| */ |
| @BeforeClass |
| public static void setupBeforeClass() throws Exception { |
| conf = UTIL.getConfiguration(); |
| Random rand = new Random(); |
| for (int i = 0; i < 10; i++) { |
| do { |
| int sign = i % 2 == 0 ? 1 : -1; |
| connectorPort += sign * rand.nextInt(100); |
| } while (!HBaseTestingUtility.available(connectorPort)); |
| try { |
| conf.setInt("regionserver.rmi.registry.port", connectorPort); |
| cluster = UTIL.startMiniCluster(); |
| LOG.info("Waiting for active/ready master"); |
| cluster.waitForActiveAndReadyMaster(); |
| master = cluster.getMaster(); |
| break; |
| } catch (Exception e) { |
| LOG.debug("Encountered exception when starting mini cluster. Trying port " + connectorPort, |
| e); |
| try { |
| // this is to avoid "IllegalStateException: A mini-cluster is already running" |
| UTIL.shutdownMiniCluster(); |
| } catch (Exception ex) { |
| LOG.debug("Encountered exception shutting down cluster", ex); |
| } |
| } |
| } |
| } |
| |
| @AfterClass |
| public static void tearDownAfterClass() throws Exception { |
| UTIL.shutdownMiniCluster(); |
| } |
| |
| /** |
| * Tests the status change using the Default Metrics System |
| */ |
| @Test |
| public void testJmxMetrics() throws Exception { |
| |
| assertEquals(getStatus(), "true"); |
| master.getLoadBalancer().updateBalancerStatus(false); |
| assertEquals(getStatus(), "false"); |
| |
| } |
| |
| /** |
| * Gets the balancer status tag from the Metrics registry |
| */ |
| public String getStatus() throws Exception { |
| MetricsSource source = |
| DefaultMetricsSystem.instance().getSource(MetricsBalancerSource.METRICS_JMX_CONTEXT); |
| if (source instanceof MetricsBalancerSourceImpl) { |
| MetricsTag status = ((MetricsBalancerSourceImpl) source).getMetricsRegistry() |
| .getTag(MetricsBalancerSource.BALANCER_STATUS); |
| return status.value(); |
| } else { |
| LOG.warn("Balancer JMX Metrics not registered"); |
| throw new Exception("MetricsBalancer JMX Context not found"); |
| } |
| } |
| |
| } |