content: /*
   * Licensed 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.topology.validators;
  
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.ambari.server.topology.ClusterTopology;
  import org.apache.ambari.server.topology.InvalidTopologyException;
  import org.apache.ambari.server.topology.TopologyValidator;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Validates configuration types related to services specified in the blueprint.
   * If the cluster creation template contains configuration types that are not related to services in the blueprint the
   * validator fails interrupting the cluster provisioning.
   */
  public class ClusterConfigTypeValidator implements TopologyValidator {
    private static final Logger LOGGER = LoggerFactory.getLogger(ClusterConfigTypeValidator.class);
  
    @Override
    public void validate(ClusterTopology topology) throws InvalidTopologyException {
  
      // config types in from the request / configuration is always set in the request instance
      Set<String> topologyClusterConfigTypes = new HashSet(topology.getConfiguration().getAllConfigTypes());
      LOGGER.debug("Cluster config types: {}", topologyClusterConfigTypes);
  
      if (topologyClusterConfigTypes.isEmpty()) {
        LOGGER.debug("No config types to be checked.");
        return;
      }
  
      // collecting all config types for services in the blueprint (from the related stack)
      Set<String> stackServiceConfigTypes = new HashSet<>();
      for (String serviceName : topology.getBlueprint().getServices()) {
        stackServiceConfigTypes.addAll(topology.getBlueprint().getStack().getConfigurationTypes(serviceName));
      }
  
      // identifying invalid config types
      Set<String> configTypeIntersection = new HashSet<>(topologyClusterConfigTypes);
  
      if (configTypeIntersection.retainAll(stackServiceConfigTypes)) {
        // there are config types not present in the stack for the services listed in the blueprint
  
        // get the wrong  config types
        Set<String> invalidConfigTypes = new HashSet<>(topologyClusterConfigTypes);
        invalidConfigTypes.removeAll(configTypeIntersection);
  
        LOGGER.error("The following config typess are wrong: {}", invalidConfigTypes);
        throw new InvalidTopologyException("The following configuration types are invalid: " + invalidConfigTypes);
      }
    }
  }
  