/**
    *
    * 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;
  
  import java.io.IOException;
  
  import javax.management.MBeanServerConnection;
  import javax.management.remote.JMXConnector;
  import javax.management.remote.JMXConnectorFactory;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.apache.hadoop.hbase.util.JVMClusterUtil;
  import org.junit.AfterClass;
  import org.junit.Assert;
  import static org.junit.Assert.fail;
  import org.junit.BeforeClass;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.rules.ExpectedException;
  
  
  
  @Category(MediumTests.class)
  public class TestJMXListener {
    private static final Log LOG = LogFactory.getLog(TestJMXListener.class);
    private static HBaseTestingUtility UTIL = new HBaseTestingUtility();
    private static int connectorPort = UTIL.randomFreePort();
  
    @BeforeClass
    public static void setupBeforeClass() throws Exception {
      Configuration conf = UTIL.getConfiguration();
  
      conf.set(CoprocessorHost.REGIONSERVER_COPROCESSOR_CONF_KEY,
        JMXListener.class.getName());
      conf.setInt("regionserver.rmi.registry.port", connectorPort);
  
      UTIL.startMiniCluster();
    }
  
    @AfterClass
    public static void tearDownAfterClass() throws Exception {
      UTIL.shutdownMiniCluster();
    }
  
    @Test
    public void testStart() throws Exception {
      JMXConnector connector = JMXConnectorFactory.connect(
        JMXListener.buildJMXServiceURL(connectorPort,connectorPort));
  
      MBeanServerConnection mb = connector.getMBeanServerConnection();
      String domain = mb.getDefaultDomain();
      Assert.assertTrue("default domain is not correct",
        !domain.isEmpty());
      connector.close();
  
    }
  
    //shutdown hbase only. then try connect, IOException expected
    @Rule
    public ExpectedException expectedEx = ExpectedException.none();
    @Test
    public void testStop() throws Exception {
      MiniHBaseCluster cluster = UTIL.getHBaseCluster();
      LOG.info("shutdown hbase cluster...");
      cluster.shutdown();
      LOG.info("wait for the hbase cluster shutdown...");
      cluster.waitUntilShutDown();
  
      JMXConnector connector = JMXConnectorFactory.newJMXConnector(
        JMXListener.buildJMXServiceURL(connectorPort,connectorPort), null);
      expectedEx.expect(IOException.class);
      connector.connect();
  
    }
  
    @Test
    public void testGetRegionServerCoprocessors() throws Exception {
      for (JVMClusterUtil.RegionServerThread rs : UTIL.getHBaseCluster().getRegionServerThreads()) {
       boolean find = false;
       for (String s : rs.getRegionServer().getRegionServerCoprocessors()) {
         if (s.equals(JMXListener.class.getSimpleName())) {
           find = true;
           break;
         }
       }
       if (!find) {
         fail("where is the JMXListener?");
       }
     }
   }
 
 }