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 java.util.HashMap;
  import org.apache.bookkeeper.client.BookKeeperAdmin;
  import org.apache.bookkeeper.common.util.JsonUtil;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  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;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * HttpEndpointService that handle Bookkeeper lost bookie recovery delay parameter related http request.
   *
   * <p>The GET method will get the value of parameter lostBookieRecoveryDelay,
   * while the PUT method will set the value of parameter lostBookieRecoveryDelay,
   */
  public class LostBookieRecoveryDelayService implements HttpEndpointService {
  
      static final Logger LOG = LoggerFactory.getLogger(LostBookieRecoveryDelayService.class);
  
      protected ServerConfiguration conf;
      protected BookKeeperAdmin bka;
  
      public LostBookieRecoveryDelayService(ServerConfiguration conf, BookKeeperAdmin bka) {
          checkNotNull(conf);
          this.conf = conf;
          this.bka = bka;
      }
  
      /*
       * set/get lostBookieRecoveryDelay.
       */
      @Override
      public HttpServiceResponse handle(HttpServiceRequest request) throws Exception {
          HttpServiceResponse response = new HttpServiceResponse();
  
          if (HttpServer.Method.PUT == request.getMethod()) {
              // request body as {"delay_seconds": <delay_seconds>}
              String requestBody = request.getBody();
  
              if (requestBody == null) {
                  response.setCode(HttpServer.StatusCode.NOT_FOUND);
                  response.setBody("Null request body for lostBookieRecoveryDelay.");
                  return response;
              }
  
              @SuppressWarnings("unchecked")
              HashMap<String, Integer> configMap = JsonUtil.fromJson(requestBody, HashMap.class);
              if (configMap != null && configMap.containsKey("delay_seconds")) {
                  int delaySeconds = configMap.get("delay_seconds");
                  bka.setLostBookieRecoveryDelay(delaySeconds);
                  response.setCode(HttpServer.StatusCode.OK);
                  response.setBody("Success set lostBookieRecoveryDelay to " + delaySeconds);
                  return response;
              } else {
                  response.setCode(HttpServer.StatusCode.NOT_FOUND);
                  response.setBody("Request body not contains lostBookieRecoveryDelay.");
                  return response;
              }
          } else if (HttpServer.Method.GET == request.getMethod()) {
              try {
                  int delaySeconds = bka.getLostBookieRecoveryDelay();
                  response.setCode(HttpServer.StatusCode.OK);
                  response.setBody("lostBookieRecoveryDelay value: " + delaySeconds);
                  if (LOG.isDebugEnabled()) {
                      LOG.debug("response body:" + response.getBody());
                  }
                  return response;
              } catch (Exception e) {
                  // may get noNode exception
                  LOG.error("Exception occurred while getting lost bookie recovery delay", e);
                  response.setCode(HttpServer.StatusCode.NOT_FOUND);
                  response.setBody("Exception when get lostBookieRecoveryDelay." + e.getMessage());
                  return response;
              }
          } else {
              response.setCode(HttpServer.StatusCode.NOT_FOUND);
              response.setBody("Not found method. Should be PUT method");
              return response;
          }
      }
  }
  