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 static com.google.common.base.Preconditions.checkNotNull;
  
  import org.apache.bookkeeper.bookie.Bookie;
  import org.apache.bookkeeper.bookie.StateManager;
  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 returns 200 if the bookie is ready.
   */
  public class BookieIsReadyService implements HttpEndpointService {
  
      private final Bookie bookie;
  
      public BookieIsReadyService(Bookie bookie) {
          this.bookie = checkNotNull(bookie);
      }
  
      @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 support GET method check if bookie is ready.");
              return response;
          }
  
          StateManager sm = bookie.getStateManager();
          if (sm.isRunning() && !sm.isShuttingDown()) {
              response.setCode(HttpServer.StatusCode.OK);
              response.setBody("OK");
          } else {
              response.setCode(HttpServer.StatusCode.SERVICE_UNAVAILABLE);
              response.setBody("Bookie is not fully started yet");
          }
          return response;
      }
  }
  