content: /*
   * 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.ambari.server.agent;
  
  import static org.apache.ambari.server.agent.ExecutionCommand.KeyNames.HOOKS_FOLDER;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import java.sql.SQLException;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.H2DatabaseCleaner;
  import org.apache.ambari.server.Role;
  import org.apache.ambari.server.actionmanager.ActionManager;
  import org.apache.ambari.server.api.services.AmbariMetaInfo;
  import org.apache.ambari.server.configuration.Configuration;
  import org.apache.ambari.server.orm.GuiceJpaInitializer;
  import org.apache.ambari.server.orm.InMemoryDefaultTestModule;
  import org.apache.ambari.server.orm.OrmTestHelper;
  import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
  import org.apache.ambari.server.security.encryption.Encryptor;
  import org.apache.ambari.server.state.Cluster;
  import org.apache.ambari.server.state.Clusters;
  import org.apache.ambari.server.state.Config;
  import org.apache.ambari.server.state.ConfigFactory;
  import org.apache.ambari.server.state.Host;
  import org.apache.ambari.server.state.HostState;
  import org.apache.ambari.server.state.Service;
  import org.apache.ambari.server.state.ServiceComponent;
  import org.apache.ambari.server.state.ServiceComponentHost;
  import org.apache.ambari.server.state.StackId;
  import org.apache.ambari.server.state.State;
  import org.apache.ambari.server.state.fsm.InvalidStateTransitionException;
  import org.apache.ambari.server.state.svccomphost.ServiceComponentHostDisableEvent;
  import org.apache.ambari.server.state.svccomphost.ServiceComponentHostInstallEvent;
  import org.apache.ambari.server.state.svccomphost.ServiceComponentHostOpSucceededEvent;
  import org.apache.ambari.server.state.svccomphost.ServiceComponentHostStartedEvent;
  import org.apache.ambari.server.topology.TopologyManager;
  import org.apache.ambari.server.utils.StageUtils;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Ignore;
  import org.junit.Test;
  import org.mockito.ArgumentCaptor;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  
  public class TestHeartbeatMonitor {
  
    private static Injector injector;
  
    private String hostname1 = "host1";
    private String hostname2 = "host2";
    private String clusterName = "cluster1";
    private String serviceName = "HDFS";
    private int heartbeatMonitorWakeupIntervalMS = 30;
    private static AmbariMetaInfo ambariMetaInfo;
    private static OrmTestHelper helper;
  
    private static final Logger LOG =
            LoggerFactory.getLogger(TestHeartbeatMonitor.class);
  
    @Before
    public void setup() throws Exception {
      injector = Guice.createInjector(new InMemoryDefaultTestModule());
      injector.getInstance(GuiceJpaInitializer.class);
      helper = injector.getInstance(OrmTestHelper.class);
      ambariMetaInfo = injector.getInstance(AmbariMetaInfo.class);
      StageUtils.setTopologyManager(injector.getInstance(TopologyManager.class));
      StageUtils.setConfiguration(injector.getInstance(Configuration.class));
    }
  
    @After
    public void teardown() throws AmbariException, SQLException {
      H2DatabaseCleaner.clearDatabaseAndStopPersistenceService(injector);
    }
  
    private void setOsFamily(Host host, String osFamily, String osVersion) {
      Map<String, String> hostAttributes = new HashMap<>();
      hostAttributes.put("os_family", osFamily);
      hostAttributes.put("os_release_version", osVersion);
  
      host.setHostAttributes(hostAttributes);
    }
  
    @Test
    @Ignore
    // TODO should be rewritten after STOMP protocol implementation.
    public void testHeartbeatLoss() throws AmbariException, InterruptedException,
            InvalidStateTransitionException {
      Clusters fsm = injector.getInstance(Clusters.class);
      String hostname = "host1";
      fsm.addHost(hostname);
      ActionManager am = mock(ActionManager.class);
      Configuration configuration = mock(Configuration.class);
      when(configuration.getHeartbeatMonitorInterval()).thenReturn(10);
      HeartbeatMonitor hm = new HeartbeatMonitor(fsm, am, 10, injector);
      HeartBeatHandler handler = new HeartBeatHandler(configuration, fsm, am, Encryptor.NONE, injector);
      Register reg = new Register();
      reg.setHostname(hostname);
      reg.setResponseId(12);
      reg.setTimestamp(System.currentTimeMillis() - 300);
      reg.setAgentVersion(ambariMetaInfo.getServerVersion());
      HostInfo hi = new HostInfo();
      hi.setOS("Centos5");
      reg.setHardwareProfile(hi);
      handler.handleRegistration(reg);
      HeartBeat hb = new HeartBeat();
      hb.setHostname(hostname);
      hb.setNodeStatus(new HostStatus(HostStatus.Status.HEALTHY, "cool"));
      hb.setTimestamp(System.currentTimeMillis());
      hb.setResponseId(12);
      handler.handleHeartBeat(hb);
      hm.start();
      //aq.enqueue(hostname, new ExecutionCommand());
      //Heartbeat will expire and action queue will be flushed
      /*while (aq.size(hostname) != 0) {
        Thread.sleep(1);
      }*/
      assertEquals(fsm.getHost(hostname).getState(), HostState.HEARTBEAT_LOST);
      hm.shutdown();
    }
  
    @Test
    public void testStateCommandsGeneration() throws AmbariException, InterruptedException,
            InvalidStateTransitionException {
      StackId stackId = new StackId("HDP-0.1");
      Clusters clusters = injector.getInstance(Clusters.class);
      clusters.addHost(hostname1);
      setOsFamily(clusters.getHost(hostname1), "redhat", "6.3");
      clusters.addHost(hostname2);
      setOsFamily(clusters.getHost(hostname2), "redhat", "6.3");
      clusters.addCluster(clusterName, stackId);
      Cluster cluster = clusters.getCluster(clusterName);
  
      RepositoryVersionEntity repositoryVersion = helper.getOrCreateRepositoryVersion(stackId,
          stackId.getStackVersion());
  
      Set<String> hostNames = new HashSet<String>(){{
        add(hostname1);
        add(hostname2);
      }};
  
      ConfigFactory configFactory = injector.getInstance(ConfigFactory.class);
      Config config = configFactory.createNew(cluster, "hadoop-env", "version1",
          new HashMap<String,String>() {{ put("a", "b"); }}, new HashMap<>());
      cluster.addDesiredConfig("_test", Collections.singleton(config));
  
  
      clusters.mapAndPublishHostsToCluster(hostNames, clusterName);
      Service hdfs = cluster.addService(serviceName, repositoryVersion);
      hdfs.addServiceComponent(Role.DATANODE.name());
      hdfs.getServiceComponent(Role.DATANODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.NAMENODE.name());
      hdfs.getServiceComponent(Role.NAMENODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.SECONDARY_NAMENODE.name());
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).addServiceComponentHost(hostname1);
  
      hdfs.getServiceComponent(Role.DATANODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
  
      ActionManager am = mock(ActionManager.class);
      HeartbeatMonitor hm = new HeartbeatMonitor(clusters, am,
        heartbeatMonitorWakeupIntervalMS, injector);
      Configuration configuration = mock(Configuration.class);
      when(configuration.getHeartbeatMonitorInterval()).thenReturn(60000);
      HeartBeatHandler handler = new HeartBeatHandler(configuration, clusters, am, Encryptor.NONE, injector);
      Register reg = new Register();
      reg.setHostname(hostname1);
      reg.setResponseId(12);
      reg.setTimestamp(System.currentTimeMillis() - 300);
      reg.setAgentVersion(ambariMetaInfo.getServerVersion());
      HostInfo hi = new HostInfo();
      hi.setOS("Centos5");
      reg.setHardwareProfile(hi);
      handler.handleRegistration(reg);
  
      HeartBeat hb = new HeartBeat();
      hb.setHostname(hostname1);
      hb.setNodeStatus(new HostStatus(HostStatus.Status.HEALTHY, "cool"));
      hb.setTimestamp(System.currentTimeMillis());
      hb.setResponseId(12);
      handler.handleHeartBeat(hb);
  
      hm.getAgentRequests().setExecutionDetailsRequest(hostname1, "DATANODE", Boolean.TRUE.toString());
  
      List<StatusCommand> cmds = hm.generateStatusCommands(hostname1);
      assertTrue("HeartbeatMonitor should generate StatusCommands for host1", cmds.size() == 3);
      assertEquals("HDFS", cmds.get(0).getServiceName());
      boolean  containsDATANODEStatus = false;
      boolean  containsNAMENODEStatus = false;
      boolean  containsSECONDARY_NAMENODEStatus = false;
  
      for (StatusCommand cmd : cmds) {
        boolean isDataNode = cmd.getComponentName().equals("DATANODE");
        containsDATANODEStatus |= isDataNode;
        containsNAMENODEStatus |= cmd.getComponentName().equals("NAMENODE");
        containsSECONDARY_NAMENODEStatus |= cmd.getComponentName().equals("SECONDARY_NAMENODE");
        assertTrue(cmd.getConfigurations().size() > 0);
  
        ExecutionCommand execCmd = cmd.getExecutionCommand();
        assertEquals(isDataNode, execCmd != null);
        if (execCmd != null) {
          Map<String, String> commandParams = execCmd.getCommandParams();
          assertTrue(HOOKS_FOLDER + " should be included", commandParams.containsKey(HOOKS_FOLDER));
        }
      }
  
      assertEquals(true, containsDATANODEStatus);
      assertEquals(true, containsNAMENODEStatus);
      assertEquals(true, containsSECONDARY_NAMENODEStatus);
  
      cmds = hm.generateStatusCommands(hostname2);
      assertTrue("HeartbeatMonitor should not generate StatusCommands for host2 because it has no services", cmds.isEmpty());
    }
  
    @Test
    @Ignore
    //TODO should be rewritten, componentStatuses already are not actual as a part of heartbeat.
    public void testStatusCommandForAnyComponents() throws Exception {
      StackId stackId = new StackId("HDP-0.1");
      Clusters clusters = injector.getInstance(Clusters.class);
      clusters.addHost(hostname1);
      setOsFamily(clusters.getHost(hostname1), "redhat", "6.3");
      clusters.addHost(hostname2);
      setOsFamily(clusters.getHost(hostname2), "redhat", "6.3");
      clusters.addCluster(clusterName, stackId);
      Cluster cluster = clusters.getCluster(clusterName);
  
      RepositoryVersionEntity repositoryVersion = helper.getOrCreateRepositoryVersion(stackId,
          stackId.getStackVersion());
  
      Set<String> hostNames = new HashSet<String>() {{
        add(hostname1);
        add(hostname2);
      }};
  
      ConfigFactory configFactory = injector.getInstance(ConfigFactory.class);
      Config hadoopEnvConfig = configFactory.createNew(cluster, "hadoop-env", "version1",
        new HashMap<String, String>() {{
          put("a", "b");
        }}, new HashMap<>());
  
  
      Config hbaseEnvConfig = configFactory.createNew(cluster, "hbase-env", "version1",
              new HashMap<String, String>() {{
                put("a", "b");
              }}, new HashMap<>());
  
      cluster.addDesiredConfig("_test", Collections.singleton(hadoopEnvConfig));
  
  
      clusters.mapAndPublishHostsToCluster(hostNames, clusterName);
      Service hdfs = cluster.addService(serviceName, repositoryVersion);
      hdfs.addServiceComponent(Role.DATANODE.name());
      hdfs.getServiceComponent(Role.DATANODE.name()).addServiceComponentHost
      (hostname1);
      hdfs.addServiceComponent(Role.NAMENODE.name());
      hdfs.getServiceComponent(Role.NAMENODE.name()).addServiceComponentHost
      (hostname1);
      hdfs.addServiceComponent(Role.SECONDARY_NAMENODE.name());
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).
          addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.HDFS_CLIENT.name());
      hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).addServiceComponentHost
      (hostname1);
      hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).addServiceComponentHost
      (hostname2);
  
      hdfs.getServiceComponent(Role.DATANODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).getServiceComponentHost(hostname2).setState(State.INSTALLED);
  
      hdfs.getServiceComponent(Role.DATANODE.name()).getServiceComponentHost(hostname1).setDesiredState(State.INSTALLED);
      hdfs.getServiceComponent(Role.NAMENODE.name()).getServiceComponentHost(hostname1).setDesiredState(State.INSTALLED);
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).getServiceComponentHost(hostname1).setDesiredState(State.INSTALLED);
      hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).getServiceComponentHost(hostname1).setDesiredState(State.INSTALLED);
      hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).getServiceComponentHost(hostname2).setDesiredState(State.INSTALLED);
  
      //ActionQueue aq = new ActionQueue();
      ActionManager am = mock(ActionManager.class);
      HeartbeatMonitor hm = new HeartbeatMonitor(clusters, am,
        heartbeatMonitorWakeupIntervalMS, injector);
      Configuration configuration = mock(Configuration.class);
      when(configuration.getHeartbeatMonitorInterval()).thenReturn(60000);
      HeartBeatHandler handler = new HeartBeatHandler(configuration, clusters, am, Encryptor.NONE, injector);
      Register reg = new Register();
      reg.setHostname(hostname1);
      reg.setResponseId(12);
      reg.setTimestamp(System.currentTimeMillis() - 300);
      reg.setAgentVersion(ambariMetaInfo.getServerVersion());
      HostInfo hi = new HostInfo();
      hi.setOS("Centos5");
      reg.setHardwareProfile(hi);
      RegistrationResponse registrationResponse = handler.handleRegistration(reg);
  
      HeartBeat hb = new HeartBeat();
      hb.setHostname(hostname1);
      hb.setNodeStatus(new HostStatus(HostStatus.Status.HEALTHY, "cool"));
      hb.setTimestamp(System.currentTimeMillis());
      hb.setResponseId(12);
      handler.handleHeartBeat(hb);
  
      Map<String, Map<String, String>> statusCommandConfig = registrationResponse.getStatusCommands().get(0).getConfigurations();
      assertEquals(statusCommandConfig.size(), 1);
      assertTrue(statusCommandConfig.containsKey("hadoop-env"));
  
      // HeartbeatMonitor should generate StatusCommands for
      // MASTER, SLAVE or CLIENT components
      List<StatusCommand> cmds = hm.generateStatusCommands(hostname1);
      assertTrue("HeartbeatMonitor should generate StatusCommands for host1",
        cmds.size() == 4);
      assertEquals("HDFS", cmds.get(0).getServiceName());
      boolean containsDATANODEStatus = false;
      boolean containsNAMENODEStatus = false;
      boolean containsSECONDARY_NAMENODEStatus = false;
      boolean containsHDFS_CLIENTStatus = false;
      for (StatusCommand cmd : cmds) {
        containsDATANODEStatus |= cmd.getComponentName().equals("DATANODE");
        containsNAMENODEStatus |= cmd.getComponentName().equals("NAMENODE");
        containsSECONDARY_NAMENODEStatus |= cmd.getComponentName().
          equals("SECONDARY_NAMENODE");
        containsHDFS_CLIENTStatus |= cmd.getComponentName().equals
            ("HDFS_CLIENT");
        assertTrue(cmd.getConfigurations().size() > 0);
        assertEquals(State.INSTALLED, cmd.getDesiredState());
        assertEquals(false, cmd.getHasStaleConfigs());
      }
      assertTrue(containsDATANODEStatus);
      assertTrue(containsNAMENODEStatus);
      assertTrue(containsSECONDARY_NAMENODEStatus);
      assertTrue(containsHDFS_CLIENTStatus);
  
      cmds = hm.generateStatusCommands(hostname2);
      assertTrue("HeartbeatMonitor should generate StatusCommands for host2, " +
        "even if it has only client components", cmds.size() == 1);
      assertTrue(cmds.get(0).getComponentName().equals(Role.HDFS_CLIENT.name()));
      assertEquals(hostname2, cmds.get(0).getHostname());
  
    }
  
    @Test
    @Ignore
    //TODO should be rewritten, componentStatuses already are not actual as a part of heartbeat.
    public void testHeartbeatStateCommandsEnqueueing() throws AmbariException, InterruptedException,
            InvalidStateTransitionException {
      StackId stackId = new StackId("HDP-0.1");
      Clusters clusters = injector.getInstance(Clusters.class);
      clusters.addHost(hostname1);
      setOsFamily(clusters.getHost(hostname1), "redhat", "5.9");
      clusters.addCluster(clusterName, stackId);
      Cluster cluster = clusters.getCluster(clusterName);
  
      RepositoryVersionEntity repositoryVersion = helper.getOrCreateRepositoryVersion(stackId,
          stackId.getStackVersion());
  
      Set<String> hostNames = new HashSet<String>(){{
        add(hostname1);
       }};
  
      clusters.mapAndPublishHostsToCluster(hostNames, clusterName);
  
      Service hdfs = cluster.addService(serviceName, repositoryVersion);
      hdfs.addServiceComponent(Role.DATANODE.name());
      hdfs.getServiceComponent(Role.DATANODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.NAMENODE.name());
      hdfs.getServiceComponent(Role.NAMENODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.SECONDARY_NAMENODE.name());
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).addServiceComponentHost(hostname1);
  
      hdfs.getServiceComponent(Role.DATANODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
  
      ArgumentCaptor<AgentCommand> commandCaptor=ArgumentCaptor.
              forClass(AgentCommand.class);
  
      ActionManager am = mock(ActionManager.class);
      HeartbeatMonitor hm = new HeartbeatMonitor(clusters, am,
        heartbeatMonitorWakeupIntervalMS, injector);
      Configuration configuration = mock(Configuration.class);
      when(configuration.getHeartbeatMonitorInterval()).thenReturn(60000);
      HeartBeatHandler handler = new HeartBeatHandler(configuration, clusters, am, Encryptor.NONE, injector);
      Register reg = new Register();
      reg.setHostname(hostname1);
      reg.setResponseId(12);
      reg.setTimestamp(System.currentTimeMillis() - 15);
      reg.setAgentVersion(ambariMetaInfo.getServerVersion());
      HostInfo hi = new HostInfo();
      hi.setOS("Centos5");
      reg.setHardwareProfile(hi);
      handler.handleRegistration(reg);
      HeartBeat hb = new HeartBeat();
      hb.setHostname(hostname1);
      hb.setNodeStatus(new HostStatus(HostStatus.Status.HEALTHY, "cool"));
      hb.setTimestamp(System.currentTimeMillis());
      hb.setResponseId(13);
      handler.handleHeartBeat(hb);
      LOG.info("YYY");
      clusters.getHost(hostname1).setLastHeartbeatTime(System.currentTimeMillis() - 15);
      hm.start();
      Thread.sleep(3 * heartbeatMonitorWakeupIntervalMS);
      hm.shutdown();
  
      int tryNumber = 0;
      while(hm.isAlive()) {
        hm.join(2*heartbeatMonitorWakeupIntervalMS);
        tryNumber++;
  
        if(tryNumber >= 5) {
          fail("HeartbeatMonitor should be already stopped");
        }
      }
      //verify(aqMock, atLeast(2)).enqueue(eq(hostname1), commandCaptor.capture());  // After registration and by HeartbeatMonitor
  
      List<AgentCommand> cmds = commandCaptor.getAllValues();
      assertTrue("HeartbeatMonitor should generate StatusCommands for host1", cmds.size() >= 2);
      for(AgentCommand command: cmds) {
        assertEquals("HDFS", ((StatusCommand)command).getServiceName());
      }
  
    }
  
    @Test
    @Ignore
    // TODO should be rewritten after STOMP protocol implementation.
    public void testHeartbeatLossWithComponent() throws AmbariException, InterruptedException,
            InvalidStateTransitionException {
      StackId stackId = new StackId("HDP-0.1");
      Clusters clusters = injector.getInstance(Clusters.class);
      clusters.addHost(hostname1);
      setOsFamily(clusters.getHost(hostname1), "redhat", "6.3");
  
      clusters.addCluster(clusterName, stackId);
      Cluster cluster = clusters.getCluster(clusterName);
  
      RepositoryVersionEntity repositoryVersion = helper.getOrCreateRepositoryVersion(stackId,
          stackId.getStackVersion());
  
      Set<String> hostNames = new HashSet<String>(){{
        add(hostname1);
       }};
  
      clusters.mapAndPublishHostsToCluster(hostNames, clusterName);
  
      Service hdfs = cluster.addService(serviceName, repositoryVersion);
      hdfs.addServiceComponent(Role.DATANODE.name());
      hdfs.getServiceComponent(Role.DATANODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.NAMENODE.name());
      hdfs.getServiceComponent(Role.NAMENODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.SECONDARY_NAMENODE.name());
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.HDFS_CLIENT.name());
      hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).addServiceComponentHost(hostname1);
  
      ActionManager am = mock(ActionManager.class);
      HeartbeatMonitor hm = new HeartbeatMonitor(clusters, am, 10, injector);
      Configuration configuration = mock(Configuration.class);
      when(configuration.getHeartbeatMonitorInterval()).thenReturn(10);
      HeartBeatHandler handler = new HeartBeatHandler(configuration, clusters, am, Encryptor.NONE, injector);
  
      Register reg = new Register();
      reg.setHostname(hostname1);
      reg.setResponseId(12);
      reg.setTimestamp(System.currentTimeMillis() - 300);
      reg.setAgentVersion(ambariMetaInfo.getServerVersion());
      HostInfo hi = new HostInfo();
      hi.setOS("Centos5");
      reg.setHardwareProfile(hi);
      handler.handleRegistration(reg);
  
      cluster = clusters.getClustersForHost(hostname1).iterator().next();
      for (ServiceComponentHost sch : cluster.getServiceComponentHosts(hostname1)) {
        if (sch.getServiceComponentName().equals("NAMENODE")) {
          // installing
          sch.handleEvent(new ServiceComponentHostInstallEvent(
              sch.getServiceComponentName(), sch.getHostName(), System.currentTimeMillis(), "HDP-0.1"));
  
          // installed
          sch.handleEvent(new ServiceComponentHostOpSucceededEvent(sch.getServiceComponentName(),
              sch.getHostName(), System.currentTimeMillis()));
  
          // started
          sch.handleEvent(new ServiceComponentHostStartedEvent(sch.getServiceComponentName(),
              sch.getHostName(), System.currentTimeMillis()));
        }
        else if (sch.getServiceComponentName().equals("DATANODE")) {
          // installing
          sch.handleEvent(new ServiceComponentHostInstallEvent(
              sch.getServiceComponentName(), sch.getHostName(), System.currentTimeMillis(), "HDP-0.1"));
        } else if (sch.getServiceComponentName().equals("SECONDARY_NAMENODE"))  {
          // installing
          sch.handleEvent(new ServiceComponentHostInstallEvent(
            sch.getServiceComponentName(), sch.getHostName(), System.currentTimeMillis(), "HDP-0.1"));
  
          // installed
          sch.handleEvent(new ServiceComponentHostOpSucceededEvent(sch.getServiceComponentName(),
            sch.getHostName(), System.currentTimeMillis()));
  
          // disabled
          sch.handleEvent(new ServiceComponentHostDisableEvent(sch.getServiceComponentName(),
            sch.getHostName(), System.currentTimeMillis()));
        }
      }
  
      HeartBeat hb = new HeartBeat();
      hb.setHostname(hostname1);
      hb.setNodeStatus(new HostStatus(HostStatus.Status.HEALTHY, "cool"));
      hb.setTimestamp(System.currentTimeMillis());
      hb.setResponseId(12);
      handler.handleHeartBeat(hb);
  
      hm.start();
      //aq.enqueue(hostname1, new ExecutionCommand());
      //Heartbeat will expire and action queue will be flushed
      /*while (aq.size(hostname1) != 0) {
        Thread.sleep(1);
      }*/
      hm.shutdown();
  
  
      cluster = clusters.getClustersForHost(hostname1).iterator().next();
      for (ServiceComponentHost sch : cluster.getServiceComponentHosts(hostname1)) {
        Service s = cluster.getService(sch.getServiceName());
        ServiceComponent sc = s.getServiceComponent(sch.getServiceComponentName());
        if (sch.getServiceComponentName().equals("NAMENODE")) {
          assertEquals(sch.getServiceComponentName(), State.UNKNOWN, sch.getState());
        } else if (sch.getServiceComponentName().equals("DATANODE")) {
          assertEquals(sch.getServiceComponentName(), State.INSTALLING, sch.getState());
        } else if (sc.isClientComponent()) {
          assertEquals(sch.getServiceComponentName(), State.INIT, sch.getState());
        } else if (sch.getServiceComponentName().equals("SECONDARY_NAMENODE")) {
          assertEquals(sch.getServiceComponentName(), State.DISABLED,
            sch.getState());
        }
      }
    }
  
    @Test
    public void testStateCommandsWithAlertsGeneration() throws AmbariException, InterruptedException,
            InvalidStateTransitionException {
      StackId stackId = new StackId("HDP-2.0.7");
      Clusters clusters = injector.getInstance(Clusters.class);
  
      clusters.addHost(hostname1);
      setOsFamily(clusters.getHost(hostname1), "redhat", "6.3");
  
      clusters.addHost(hostname2);
      setOsFamily(clusters.getHost(hostname2), "redhat", "6.3");
      clusters.addCluster(clusterName, stackId);
  
      Cluster cluster = clusters.getCluster(clusterName);
  
      cluster.setDesiredStackVersion(stackId);
      RepositoryVersionEntity repositoryVersion = helper.getOrCreateRepositoryVersion(stackId,
          stackId.getStackVersion());
  
      Set<String> hostNames = new HashSet<String>(){{
        add(hostname1);
        add(hostname2);
      }};
  
      clusters.mapAndPublishHostsToCluster(hostNames, clusterName);
  
      Service hdfs = cluster.addService(serviceName, repositoryVersion);
  
      hdfs.addServiceComponent(Role.DATANODE.name());
      hdfs.getServiceComponent(Role.DATANODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.NAMENODE.name());
      hdfs.getServiceComponent(Role.NAMENODE.name()).addServiceComponentHost(hostname1);
      hdfs.addServiceComponent(Role.SECONDARY_NAMENODE.name());
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).addServiceComponentHost(hostname1);
  
      hdfs.getServiceComponent(Role.DATANODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
      hdfs.getServiceComponent(Role.SECONDARY_NAMENODE.name()).getServiceComponentHost(hostname1).setState(State.INSTALLED);
  
      //ActionQueue aq = new ActionQueue();
      ActionManager am = mock(ActionManager.class);
      HeartbeatMonitor hm = new HeartbeatMonitor(clusters, am,
        heartbeatMonitorWakeupIntervalMS, injector);
      Configuration configuration = mock(Configuration.class);
      when(configuration.getHeartbeatMonitorInterval()).thenReturn(60000);
      HeartBeatHandler handler = new HeartBeatHandler(configuration, clusters, am, Encryptor.NONE, injector);
      Register reg = new Register();
      reg.setHostname(hostname1);
      reg.setResponseId(12);
      reg.setTimestamp(System.currentTimeMillis() - 300);
      reg.setAgentVersion(ambariMetaInfo.getServerVersion());
      HostInfo hi = new HostInfo();
      hi.setOS("Centos5");
      reg.setHardwareProfile(hi);
      handler.handleRegistration(reg);
  
      HeartBeat hb = new HeartBeat();
      hb.setHostname(hostname1);
      hb.setNodeStatus(new HostStatus(HostStatus.Status.HEALTHY, "cool"));
      hb.setTimestamp(System.currentTimeMillis());
      hb.setResponseId(12);
      handler.handleHeartBeat(hb);
  
      List<StatusCommand> cmds = hm.generateStatusCommands(hostname1);
      assertEquals("HeartbeatMonitor should generate StatusCommands for host1",
          3, cmds.size());
      assertEquals("HDFS", cmds.get(0).getServiceName());
  
      cmds = hm.generateStatusCommands(hostname2);
      assertTrue("HeartbeatMonitor should not generate StatusCommands for host2 because it has no services", cmds.isEmpty());
    }
  }
  