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.metadata;
  
  
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import java.sql.SQLException;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.H2DatabaseCleaner;
  import org.apache.ambari.server.Role;
  import org.apache.ambari.server.RoleCommand;
  import org.apache.ambari.server.actionmanager.HostRoleCommand;
  import org.apache.ambari.server.actionmanager.HostRoleCommandFactory;
  import org.apache.ambari.server.orm.GuiceJpaInitializer;
  import org.apache.ambari.server.orm.InMemoryDefaultTestModule;
  import org.apache.ambari.server.stageplanner.RoleGraph;
  import org.apache.ambari.server.stageplanner.RoleGraphFactory;
  import org.apache.ambari.server.stageplanner.RoleGraphNode;
  import org.apache.ambari.server.state.Service;
  import org.apache.ambari.server.state.ServiceComponent;
  import org.apache.ambari.server.state.StackId;
  import org.apache.ambari.server.state.cluster.ClusterImpl;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.Lists;
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  
  import junit.framework.Assert;
  
  public class RoleGraphTest {
  
    private Injector injector;
    private RoleCommandOrderProvider roleCommandOrderProvider;
    private RoleGraphFactory roleGraphFactory;
    private HostRoleCommandFactory hrcFactory;
  
    @Before
    public void setup() throws Exception {
      injector = Guice.createInjector(new InMemoryDefaultTestModule());
      injector.getInstance(GuiceJpaInitializer.class);
      roleCommandOrderProvider = injector.getInstance(RoleCommandOrderProvider.class);
      roleGraphFactory = injector.getInstance(RoleGraphFactory.class);
      hrcFactory = injector.getInstance(HostRoleCommandFactory.class);
    }
  
    @After
    public void teardown() throws AmbariException, SQLException {
      H2DatabaseCleaner.clearDatabaseAndStopPersistenceService(injector);
    }
  
    @Test
    public void testValidateOrder() throws AmbariException {
      ClusterImpl cluster = mock(ClusterImpl.class);
      when(cluster.getCurrentStackVersion()).thenReturn(new StackId("HDP-2.0.6"));
      when(cluster.getClusterId()).thenReturn(1L);
  
      Service hdfsService = mock(Service.class);
      when(hdfsService.getDesiredStackId()).thenReturn(new StackId("HDP-2.0.6"));
      when (cluster.getServices()).thenReturn(ImmutableMap.<String, Service>builder()
          .put("HDFS", hdfsService)
          .build());
  
      RoleCommandOrder rco = roleCommandOrderProvider.getRoleCommandOrder(cluster);
  
      RoleGraphNode datanode_upgrade = new RoleGraphNode(Role.DATANODE, RoleCommand.UPGRADE);
      RoleGraphNode hdfs_client_upgrade = new RoleGraphNode(Role.HDFS_CLIENT, RoleCommand.UPGRADE);
      Assert.assertEquals(-1, rco.order(datanode_upgrade, hdfs_client_upgrade));
      Assert.assertEquals(1, rco.order(hdfs_client_upgrade, datanode_upgrade));
  
      RoleGraphNode namenode_upgrade = new RoleGraphNode(Role.NAMENODE, RoleCommand.UPGRADE);
      RoleGraphNode ganglia_server_upgrade = new RoleGraphNode(Role.GANGLIA_SERVER, RoleCommand.UPGRADE);
      Assert.assertEquals(1, rco.order(ganglia_server_upgrade, hdfs_client_upgrade));
      Assert.assertEquals(1, rco.order(ganglia_server_upgrade, datanode_upgrade));
      Assert.assertEquals(-1, rco.order(namenode_upgrade, ganglia_server_upgrade));
  
      RoleGraphNode datanode_start = new RoleGraphNode(Role.DATANODE, RoleCommand.START);
      RoleGraphNode datanode_install = new RoleGraphNode(Role.DATANODE, RoleCommand.INSTALL);
      RoleGraphNode jobtracker_start = new RoleGraphNode(Role.JOBTRACKER, RoleCommand.START);
      Assert.assertEquals(1, rco.order(datanode_start, datanode_install));
      Assert.assertEquals(1, rco.order(jobtracker_start, datanode_start));
      Assert.assertEquals(0, rco.order(jobtracker_start, jobtracker_start));
  
  
      RoleGraphNode pig_service_check = new RoleGraphNode(Role.PIG_SERVICE_CHECK, RoleCommand.SERVICE_CHECK);
      RoleGraphNode resourcemanager_start = new RoleGraphNode(Role.RESOURCEMANAGER, RoleCommand.START);
      Assert.assertEquals(-1, rco.order(resourcemanager_start, pig_service_check));
  
      RoleGraphNode hdfs_service_check = new RoleGraphNode(Role.HDFS_SERVICE_CHECK, RoleCommand.SERVICE_CHECK);
      RoleGraphNode snamenode_start = new RoleGraphNode(Role.SECONDARY_NAMENODE, RoleCommand.START);
      Assert.assertEquals(-1, rco.order(snamenode_start, hdfs_service_check));
  
      RoleGraphNode mapred2_service_check = new RoleGraphNode(Role.MAPREDUCE2_SERVICE_CHECK, RoleCommand.SERVICE_CHECK);
      RoleGraphNode rm_start = new RoleGraphNode(Role.RESOURCEMANAGER, RoleCommand.START);
      RoleGraphNode nm_start = new RoleGraphNode(Role.NODEMANAGER, RoleCommand.START);
      RoleGraphNode hs_start = new RoleGraphNode(Role.HISTORYSERVER, RoleCommand.START);
  
      Assert.assertEquals(-1, rco.order(rm_start, mapred2_service_check));
      Assert.assertEquals(-1, rco.order(nm_start, mapred2_service_check));
      Assert.assertEquals(-1, rco.order(hs_start, mapred2_service_check));
      Assert.assertEquals(-1, rco.order(hs_start, mapred2_service_check));
      Assert.assertEquals(1, rco.order(nm_start, rm_start));
  
      //Non-HA mode
      RoleGraphNode nn_start = new RoleGraphNode(Role.NAMENODE, RoleCommand.START);
      RoleGraphNode jn_start = new RoleGraphNode(Role.JOURNALNODE, RoleCommand.START);
      RoleGraphNode zk_server_start = new RoleGraphNode(Role.ZOOKEEPER_SERVER, RoleCommand.START);
      RoleGraphNode hbase_master_start = new RoleGraphNode(Role.HBASE_MASTER, RoleCommand.START);
      RoleGraphNode hive_srv_start = new RoleGraphNode(Role.HIVE_SERVER, RoleCommand.START);
      RoleGraphNode hive_ms_start = new RoleGraphNode(Role.HIVE_METASTORE, RoleCommand.START);
      RoleGraphNode mysql_start = new RoleGraphNode(Role.MYSQL_SERVER, RoleCommand.START);
      RoleGraphNode oozie_srv_start = new RoleGraphNode(Role.OOZIE_SERVER, RoleCommand.START);
      RoleGraphNode webhcat_srv_start = new RoleGraphNode(Role.WEBHCAT_SERVER, RoleCommand.START);
      RoleGraphNode flume_start = new RoleGraphNode(Role.FLUME_HANDLER, RoleCommand.START);
      RoleGraphNode zkfc_start = new RoleGraphNode(Role.ZKFC, RoleCommand.START);
  
      Assert.assertEquals(0, rco.order(nn_start, jn_start));
      Assert.assertEquals(0, rco.order(nn_start, zk_server_start));
      Assert.assertEquals(0, rco.order(zkfc_start, nn_start));
  
      Assert.assertEquals(1, rco.order(flume_start, oozie_srv_start));
      Assert.assertEquals(1, rco.order(hbase_master_start, zk_server_start));
      Assert.assertEquals(1, rco.order(hive_srv_start, mysql_start));
      Assert.assertEquals(1, rco.order(hive_ms_start, mysql_start));
      Assert.assertEquals(1, rco.order(webhcat_srv_start, datanode_start));
  
      // Enable HA for cluster
      Service hdfsServiceMock = mock(Service.class);
      ServiceComponent jnComponentMock = mock(ServiceComponent.class);
      when(cluster.getService("HDFS")).thenReturn(hdfsServiceMock);
      when(hdfsServiceMock.getServiceComponent("JOURNALNODE")).thenReturn(jnComponentMock);
  
      rco = roleCommandOrderProvider.getRoleCommandOrder(cluster);
      Assert.assertEquals(1, rco.order(nn_start, jn_start));
      Assert.assertEquals(1, rco.order(nn_start, zk_server_start));
      Assert.assertEquals(1, rco.order(zkfc_start, nn_start));
    }
  
    /**
     * Tests the ordering of
     * {@link RoleGraph#getOrderedHostRoleCommands(java.util.Map)}.
     *
     * @throws AmbariException
     */
    @Test
    public void testGetOrderedHostRoleCommands() throws AmbariException {
      ClusterImpl cluster = mock(ClusterImpl.class);
      when(cluster.getCurrentStackVersion()).thenReturn(new StackId("HDP-2.0.6"));
      when(cluster.getClusterId()).thenReturn(1L);
  
      Service hdfsService = mock(Service.class);
      when(hdfsService.getDesiredStackId()).thenReturn(new StackId("HDP-2.0.6"));
  
      Service zkService = mock(Service.class);
      when(zkService.getDesiredStackId()).thenReturn(new StackId("HDP-2.0.6"));
  
      Service hbaseService = mock(Service.class);
      when(hbaseService.getDesiredStackId()).thenReturn(new StackId("HDP-2.0.6"));
  
      when(cluster.getServices()).thenReturn(ImmutableMap.<String, Service>builder()
          .put("HDFS", hdfsService)
          .put("ZOOKEEPER", zkService)
          .put("HBASE", hbaseService)
          .build());
  
  
      RoleCommandOrder rco = roleCommandOrderProvider.getRoleCommandOrder(cluster);
      RoleGraph roleGraph = roleGraphFactory.createNew(rco);
  
      Map<String, Map<String, HostRoleCommand>> unorderedCommands = new HashMap<>();
      Map<String, HostRoleCommand> c6401Commands = new HashMap<>();
      Map<String, HostRoleCommand> c6402Commands = new HashMap<>();
      Map<String, HostRoleCommand> c6403Commands = new HashMap<>();
  
      HostRoleCommand hrcNameNode = hrcFactory.create("c6041", Role.NAMENODE, null, RoleCommand.START);
      HostRoleCommand hrcZooKeeperHost1 = hrcFactory.create("c6041", Role.ZOOKEEPER_SERVER, null, RoleCommand.START);
      HostRoleCommand hrcHBaseMaster = hrcFactory.create("c6042", Role.HBASE_MASTER, null, RoleCommand.START);
      HostRoleCommand hrcZooKeeperHost3 = hrcFactory.create("c6043", Role.ZOOKEEPER_SERVER, null, RoleCommand.START);
  
      c6401Commands.put(hrcNameNode.getRole().name(), hrcNameNode);
      c6401Commands.put(hrcZooKeeperHost1.getRole().name(), hrcZooKeeperHost1);
      c6402Commands.put(hrcHBaseMaster.getRole().name(), hrcHBaseMaster);
      c6403Commands.put(hrcZooKeeperHost3.getRole().name(), hrcZooKeeperHost3);
  
      unorderedCommands.put("c6401", c6401Commands);
      unorderedCommands.put("c6402", c6402Commands);
      unorderedCommands.put("c6403", c6403Commands);
  
      List<Map<String, List<HostRoleCommand>>> stages = roleGraph.getOrderedHostRoleCommands(unorderedCommands);
  
      Assert.assertEquals(2, stages.size());
  
      Map<String, List<HostRoleCommand>> stage1 = stages.get(0);
      Map<String, List<HostRoleCommand>> stage2 = stages.get(1);
  
      Assert.assertEquals(2, stage1.size());
      Assert.assertEquals(1, stage2.size());
  
      List<HostRoleCommand> stage1CommandsHost1 = stage1.get("c6401");
      List<HostRoleCommand> stage1CommandsHost3 = stage1.get("c6403");
      List<HostRoleCommand> stage2CommandsHost2 = stage2.get("c6402");
  
      Assert.assertEquals(3, stage1CommandsHost1.size() + stage1CommandsHost3.size());
      Assert.assertEquals(1, stage2CommandsHost2.size());
  
      List<Role> stage1Roles = Lists.newArrayList(stage1CommandsHost1.get(0).getRole(),
          stage1CommandsHost1.get(1).getRole(), stage1CommandsHost3.get(0).getRole());
  
      Assert.assertTrue(stage1Roles.contains(Role.NAMENODE));
      Assert.assertTrue(stage1Roles.contains(Role.ZOOKEEPER_SERVER));
      Assert.assertEquals(Role.ZOOKEEPER_SERVER, stage1CommandsHost3.get(0).getRole());
      Assert.assertEquals(Role.HBASE_MASTER, stage2CommandsHost2.get(0).getRole());
    }
  }
  