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.bookkeeper.server.http.service;
  
  import lombok.AllArgsConstructor;
  import lombok.Data;
  import lombok.NoArgsConstructor;
  import lombok.NonNull;
  import org.apache.bookkeeper.bookie.Bookie;
  import org.apache.bookkeeper.common.util.JsonUtil;
  import org.apache.bookkeeper.http.HttpServer;
  import org.apache.bookkeeper.http.service.HttpEndpointService;
  import org.apache.bookkeeper.http.service.HttpServiceRequest;
  import org.apache.bookkeeper.http.service.HttpServiceResponse;
  
  /**
   * HttpEndpointService that exposes the current info of the bookie.
   *
   * <pre>
   * <code>
   * {
   *  "freeSpace" : 0,
   *  "totalSpace" : 0
   * }
   * </code>
   * </pre>
   */
  @AllArgsConstructor
  public class BookieInfoService implements HttpEndpointService {
      @NonNull private final Bookie bookie;
  
      /**
       * POJO definition for the bookie info response.
       */
      @Data
      @NoArgsConstructor
      @AllArgsConstructor
      public static class BookieInfo {
          private long freeSpace;
          private long totalSpace;
      }
  
      @Override
      public HttpServiceResponse handle(HttpServiceRequest request) throws Exception {
          HttpServiceResponse response = new HttpServiceResponse();
  
          if (HttpServer.Method.GET != request.getMethod()) {
              response.setCode(HttpServer.StatusCode.NOT_FOUND);
              response.setBody("Only GET is supported.");
              return response;
          }
  
          BookieInfo bi = new BookieInfo(bookie.getTotalFreeSpace(), bookie.getTotalDiskSpace());
  
          String jsonResponse = JsonUtil.toJson(bi);
          response.setBody(jsonResponse);
          response.setCode(HttpServer.StatusCode.OK);
          return response;
      }
  }
  