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.api.services;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import jakarta.ws.rs.GET;
  import jakarta.ws.rs.Path;
  import jakarta.ws.rs.PathParam;
  import jakarta.ws.rs.Produces;
  import jakarta.ws.rs.core.Context;
  import jakarta.ws.rs.core.HttpHeaders;
  import jakarta.ws.rs.core.Response;
  import jakarta.ws.rs.core.UriInfo;
  
  import org.apache.ambari.annotations.ApiIgnore;
  import org.apache.ambari.server.api.resources.ResourceInstance;
  import org.apache.ambari.server.controller.spi.Resource;
  
  /**
   * Read-only service responsible for Kerberos descriptor resource requests.
   * <p/>
   * The following Kerberos descriptor types are available
   * <ul>
   * <li>STACK - the default descriptor for the relevant stack</li>
   * <li>USER - the user-supplied updates to be applied to the default descriptor</li>
   * <li>COMPOSITE - the default descriptor for the relevant stack with the the user-supplied updates applied</li>
   * </ul>
   */
  public class ClusterKerberosDescriptorService extends BaseService {
    /**
     * Parent cluster name.
     */
    private String clusterName;
  
    /**
     * Constructor.
     *
     * @param clusterName cluster id
     */
    public ClusterKerberosDescriptorService(String clusterName) {
      this.clusterName = clusterName;
    }
  
    /**
     * Handles URL: /clusters/{clusterID}/kerberos_descriptors
     * Gets Kerberos descriptors
     *
     * @param headers http headers
     * @param ui      uri info
     * @return Kerberos descriptor resource representation
     */
    @GET @ApiIgnore // until documented
    @Produces("text/plain")
    public Response getKerberosDescriptors(@Context HttpHeaders headers, @Context UriInfo ui) {
      return handleRequest(headers, null, ui, Request.Type.GET, createResource(null));
    }
  
    /**
     * Handles URL: /clusters/{clusterID}/kerberos_descriptors
     * Get a specific composite Kerberos descriptor
     *
     * @param headers http headers
     * @param ui      uri info
     * @param type    Kerberos descriptor type (COMPOSITE, STACK, USER)
     * @return Kerberos descriptor instance representation
     */
    @GET @ApiIgnore // until documented
    @Path("{type}")
    @Produces("text/plain")
    public Response getKerberosDescriptor(@Context HttpHeaders headers, @Context UriInfo ui,
                                  @PathParam("type") String type) {
      return handleRequest(headers, null, ui, Request.Type.GET, createResource(type));
    }
  
    /**
     * Create a composite Kerberos Descriptor resource instance.
     *
     * @param type the Kerberos descriptor type (COMPOSITE, STACK, USER)
     * @return a service resource instance
     */
    ResourceInstance createResource(String type) {
      Map<Resource.Type, String> mapIds = new HashMap<>();
      mapIds.put(Resource.Type.Cluster, clusterName);
      mapIds.put(Resource.Type.ClusterKerberosDescriptor, type);
      return createResource(Resource.Type.ClusterKerberosDescriptor, mapIds);
    }
  }
  