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   * 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.controller.utilities.state;
  
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.ambari.server.AmbariException;
  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.ServiceComponent;
  import org.apache.ambari.server.state.ServiceComponentHost;
  import org.apache.ambari.server.state.State;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class HDFSServiceCalculatedStateTest extends GeneralServiceCalculatedStateTest{
    @Override
    protected String getServiceName() {
      return "HDFS";
    }
  
    @Override
    protected ServiceCalculatedState getServiceCalculatedStateObject() {
      return new HDFSServiceCalculatedState();
    }
  
    @Override
    protected void createComponentsAndHosts() throws Exception {
      ServiceComponent masterComponent = service.addServiceComponent("NAMENODE");
      ServiceComponent masterComponent1 = service.addServiceComponent("SECONDARY_NAMENODE");
      ServiceComponent clientComponent = service.addServiceComponent("HDFS_CLIENT");
  
      for (String hostName: hosts){
        clusters.addHost(hostName);
        Host host = clusters.getHost(hostName);
  
        Map<String, String> hostAttributes = new HashMap<>();
        hostAttributes.put("os_family", "redhat");
        hostAttributes.put("os_release_version", "6.3");
        host.setHostAttributes(hostAttributes);
        host.setState(HostState.HEALTHY);
        clusters.mapHostToCluster(hostName, clusterName);
  
        ServiceComponentHost sch = masterComponent.addServiceComponentHost(hostName);
        sch.setVersion("2.1.1.0");
        sch.setState(State.STARTED);
  
        ServiceComponentHost sch1 = masterComponent1.addServiceComponentHost(hostName);
        sch1.setVersion("2.1.1.0");
        sch1.setState(State.STARTED);
  
        sch = clientComponent.addServiceComponentHost(hostName);
        sch.setVersion("2.1.1.0");
        sch.setState(State.INSTALLED);
      }
    }
  
    @Override
    public void testServiceState_STARTED() throws Exception {
      updateServiceState(State.STARTED);
  
      State state = serviceCalculatedState.getState(clusterName, getServiceName());
      Assert.assertEquals(State.STARTED, state);
    }
  
    @Override
    public void testServiceState_STOPPED() throws Exception {
     updateServiceState(State.INSTALLED);
  
      State state = serviceCalculatedState.getState(clusterName, getServiceName());
      Assert.assertEquals(State.INSTALLED, state);
    }
  
    //Should be in INSTALLED state when all NNs for at least one NS is INSTALLED
    @Test
    public void testServiceState_STOPPED_WITH_TWO_NS() throws Exception {
      simulateNNFederation();
      ServiceComponent nnComponent = service.getServiceComponent("NAMENODE");
  
      updateServiceState(State.STARTED);
  
      nnComponent.getServiceComponentHost("h3").setState(State.INSTALLED);
      nnComponent.getServiceComponentHost("h4").setState(State.INSTALLED);
  
      State state = serviceCalculatedState.getState(clusterName, getServiceName());
      Assert.assertEquals(State.INSTALLED, state);
    }
  
    //Should be in STARTED state when at least one NN for each NS is STARTED
    @Test
    public void testServiceState_STARTED_WITH_TWO_NS() throws Exception {
      simulateNNFederation();
      ServiceComponent nnComponent = service.getServiceComponent("NAMENODE");
  
      updateServiceState(State.STARTED);
  
      nnComponent.getServiceComponentHost("h1").setState(State.INSTALLED);
      nnComponent.getServiceComponentHost("h4").setState(State.INSTALLED);
  
      State state = serviceCalculatedState.getState(clusterName, getServiceName());
      Assert.assertEquals(State.STARTED, state);
    }
  
    private void simulateNNFederation() throws AmbariException {
      HashMap<String, String> hdfsSiteProperties = new HashMap<>();
      hdfsSiteProperties.put("dfs.internal.nameservices", "ns1,ns2");
      hdfsSiteProperties.put("dfs.ha.namenodes.ns1", "nn1,nn2");
      hdfsSiteProperties.put("dfs.ha.namenodes.ns2", "nn3,nn4");
      hdfsSiteProperties.put("dfs.namenode.http-address.ns1.nn1", "h1:1234");
      hdfsSiteProperties.put("dfs.namenode.http-address.ns1.nn2", "h2:1234");
      hdfsSiteProperties.put("dfs.namenode.http-address.ns2.nn3", "h3:1234");
      hdfsSiteProperties.put("dfs.namenode.http-address.ns2.nn4", "h4:1234");
  
      ConfigFactory configFactory = injector.getInstance(ConfigFactory.class);
      Config config = configFactory.createNew(cluster, "hdfs-site", "version1",
          hdfsSiteProperties, new HashMap<>());
      cluster.addDesiredConfig("_test", Collections.singleton(config));
  
      ServiceComponent nnComponent = service.getServiceComponent("NAMENODE");
      ServiceComponent clientComponent = service.getServiceComponent("HDFS_CLIENT");
      ServiceComponent jnComponent = service.addServiceComponent("JOURNALNODE");
  
      List<String> newHosts = new ArrayList<>();
      newHosts.add("h3");
      newHosts.add("h4");
  
      for (String hostName: newHosts){
        clusters.addHost(hostName);
        Host host = clusters.getHost(hostName);
  
        Map<String, String> hostAttributes = new HashMap<>();
        hostAttributes.put("os_family", "redhat");
        hostAttributes.put("os_release_version", "6.3");
        host.setHostAttributes(hostAttributes);
        host.setState(HostState.HEALTHY);
        clusters.mapHostToCluster(hostName, clusterName);
  
        ServiceComponentHost sch = nnComponent.addServiceComponentHost(hostName);
        sch.setVersion("2.1.1.0");
        sch.setState(State.STARTED);
  
        sch = jnComponent.addServiceComponentHost(hostName);
        sch.setVersion("2.1.1.0");
        sch.setState(State.INSTALLED);
  
        sch = clientComponent.addServiceComponentHost(hostName);
        sch.setVersion("2.1.1.0");
        sch.setState(State.INSTALLED);
      }
    }
  }
  