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.checks;
  
  import java.util.EnumSet;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.ambari.annotations.UpgradeCheckInfo;
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.orm.entities.HostVersionEntity;
  import org.apache.ambari.server.state.Cluster;
  import org.apache.ambari.server.state.Host;
  import org.apache.ambari.server.state.MaintenanceState;
  import org.apache.ambari.server.state.RepositoryVersionState;
  import org.apache.ambari.server.state.StackId;
  import org.apache.ambari.spi.RepositoryVersion;
  import org.apache.ambari.spi.upgrade.UpgradeCheckDescription;
  import org.apache.ambari.spi.upgrade.UpgradeCheckGroup;
  import org.apache.ambari.spi.upgrade.UpgradeCheckRequest;
  import org.apache.ambari.spi.upgrade.UpgradeCheckResult;
  import org.apache.ambari.spi.upgrade.UpgradeCheckStatus;
  import org.apache.ambari.spi.upgrade.UpgradeCheckType;
  import org.apache.ambari.spi.upgrade.UpgradeType;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.inject.Singleton;
  
  /**
   * Checks that all hosts have particular repository version. Hosts that are in
   * maintenance mode will be skipped and will not report a warning. Even if they
   * do not have the repo version, they will not be included in the upgrade
   * orchstration, so no warning is required.
   */
  @Singleton
  @UpgradeCheckInfo(
      group = UpgradeCheckGroup.REPOSITORY_VERSION,
      required = { UpgradeType.ROLLING, UpgradeType.NON_ROLLING, UpgradeType.HOST_ORDERED })
  public class HostsRepositoryVersionCheck extends ClusterCheck {
  
    static final UpgradeCheckDescription HOSTS_REPOSITORY_VERSION = new UpgradeCheckDescription("HOSTS_REPOSITORY_VERSION",
        UpgradeCheckType.HOST,
        "All hosts should have target version installed",
        new ImmutableMap.Builder<String, String>()
          .put(UpgradeCheckDescription.DEFAULT,
              "The following hosts must have version {{version}} installed: {{fails}}.").build());
  
  
    /**
     * Constructor.
     */
    public HostsRepositoryVersionCheck() {
      super(HOSTS_REPOSITORY_VERSION);
    }
  
    @Override
    public UpgradeCheckResult perform(UpgradeCheckRequest request)
        throws AmbariException {
      UpgradeCheckResult result = new UpgradeCheckResult(this);
  
      final String clusterName = request.getClusterName();
      final Cluster cluster = clustersProvider.get().getCluster(clusterName);
      final Map<String, Host> clusterHosts = clustersProvider.get().getHostsForCluster(clusterName);
  
      for (Host host : clusterHosts.values()) {
        // hosts in MM will produce a warning if they do not have the repo version
        MaintenanceState maintenanceState = host.getMaintenanceState(cluster.getClusterId());
        if (maintenanceState != MaintenanceState.OFF) {
          continue;
        }
  
        RepositoryVersion repositoryVersion = request.getTargetRepositoryVersion();
        StackId repositoryStackId = new StackId(repositoryVersion.getStackId());
  
        // get the host version entity for this host and repository
        final HostVersionEntity hostVersion = hostVersionDaoProvider.get().findByClusterStackVersionAndHost(
            clusterName, repositoryStackId, repositoryVersion.getVersion(), host.getHostName());
  
        // the repo needs to either be installed or not required
        Set<RepositoryVersionState> okStates = EnumSet.of(RepositoryVersionState.INSTALLED,
            RepositoryVersionState.NOT_REQUIRED);
  
        if (hostVersion == null || !okStates.contains(hostVersion.getState())) {
          result.getFailedOn().add(host.getHostName());
  
          result.getFailedDetail().add(
              new HostDetail(host.getHostId(), host.getHostName()));
        }
      }
  
      if (!result.getFailedOn().isEmpty()) {
        result.setStatus(UpgradeCheckStatus.FAIL);
        result.setFailReason(getFailReason(result, request));
      }
  
      return result;
    }
  }