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.DELETE;
  import jakarta.ws.rs.GET;
  import jakarta.ws.rs.POST;
  import jakarta.ws.rs.PUT;
  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;
  
  /**
   * Service responsible for instances resource requests.
   */
  @Path("/instances/")
  public class InstanceService extends BaseService {
  
    /**
     * Parent feed id.
     */
    private String m_feedName;
  
    /**
     * Constructor.
     */
    public InstanceService() {
    }
  
    /**
     * Constructor.
     *
     * @param feedName feed id
     */
    public InstanceService(String feedName) {
      m_feedName = feedName;
    }
  
    /**
     * Handles GET /feeds/{feedID}/instances/{instanceID} and /instances/{instanceID}
     * Get a specific instance.
     *
     * @param headers     http headers
     * @param ui          uri info
     * @param instanceID  instance id
     *
     * @return instance resource representation
     */
    @GET @ApiIgnore // until documented
    @Path("{instanceID}")
    @Produces("text/plain")
    public Response getInstance(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                            @PathParam("instanceID") String instanceID) {
  
      return handleRequest(headers, body, ui, Request.Type.GET,
          createInstanceResource(m_feedName, instanceID, ui));
    }
  
    /**
     * Handles GET /feeds/{feedID}/instances and /instances
     * Get all instances for a feed.
     *
     * @param headers http headers
     * @param ui      uri info
     * @return instance collection resource representation
     */
    @GET @ApiIgnore // until documented
    @Produces("text/plain")
    public Response getInstances(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
      return handleRequest(headers, body, ui, Request.Type.GET,
          createInstanceResource(m_feedName, null, ui));
    }
  
    /**
     * Handles POST /feeds/{feedID}/instances/{instanceID}
     * Create a specific instance.
     *
     * @param body     http body
     * @param headers  http headers
     * @param ui       uri info
     * @param instanceID instance id
     *
     * @return instance resource representation
     */
    @POST @ApiIgnore // until documented
    @Path("{instanceID}")
    @Produces("text/plain")
    public Response createInstance(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                               @PathParam("instanceID") String instanceID) {
  
      return handleRequest(headers, body, ui, Request.Type.POST,
          createInstanceResource(m_feedName, instanceID, ui));
    }
  
    /**
     * Handles PUT /feeds/{feedID}/instances/{instanceID}
     * Updates a specific instance.
     *
     * @param body     http body
     * @param headers  http headers
     * @param ui       uri info
     * @param instanceID instance id
     *
     * @return information regarding updated instance
     */
    @PUT @ApiIgnore // until documented
    @Path("{instanceID}")
    @Produces("text/plain")
    public Response updateInstance(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                               @PathParam("instanceID") String instanceID) {
  
      return handleRequest(headers, body, ui, Request.Type.PUT,
          createInstanceResource(m_feedName, instanceID, ui));
    }
  
    /**
     * Handles DELETE /feeds/{feedID}/instances/{instanceID}
     * Deletes a specific instance.
     *
     * @param headers  http headers
     * @param ui       uri info
     * @param instanceID instance id
     *
     * @return instance resource representation
     */
    @DELETE @ApiIgnore // until documented
    @Path("{instanceID}")
    @Produces("text/plain")
    public Response deleteInstance(@Context HttpHeaders headers, @Context UriInfo ui,
                               @PathParam("instanceID") String instanceID) {
  
      return handleRequest(headers, null, ui, Request.Type.DELETE,
          createInstanceResource(m_feedName, instanceID, ui));
    }
  
    /**
     * Create a service resource instance.
     *
     *
     *
     * @param feedName  feed
     * @param instanceID     instance name
     * @param ui           uri information
     *
     * @return a instance resource instance
     */
    ResourceInstance createInstanceResource(String feedName, String instanceID, UriInfo ui) {
      boolean isAttached = ui.getRequestUri().toString().contains("/feeds/");
  
      Map<Resource.Type,String> mapIds = new HashMap<>();
      mapIds.put(Resource.Type.DRInstance, instanceID);
      if (isAttached) {
        mapIds.put(Resource.Type.DRFeed, feedName);
      }
  
      return createResource(Resource.Type.DRInstance, mapIds);
    }
  }
  