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 com.google.common.collect.Maps;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Map;
  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.apache.bookkeeper.net.BookieId;
  import org.apache.bookkeeper.net.BookieSocketAddress;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * HttpEndpointService that handle Bookkeeper list bookies related http request.
   * The GET method will list all bookies of type rw|ro in this bookkeeper cluster.
   */
  public class ListBookiesService implements HttpEndpointService {
  
      static final Logger LOG = LoggerFactory.getLogger(ListBookiesService.class);
  
      protected ServerConfiguration conf;
      protected BookKeeperAdmin bka;
  
      public ListBookiesService(ServerConfiguration conf, BookKeeperAdmin bka) {
          checkNotNull(conf);
          this.conf = conf;
          this.bka = bka;
      }
  
      @Override
      public HttpServiceResponse handle(HttpServiceRequest request) throws Exception {
          HttpServiceResponse response = new HttpServiceResponse();
          // GET
          if (HttpServer.Method.GET == request.getMethod()) {
              Collection<BookieId> bookies = new ArrayList<BookieId>();
  
              Map<String, String> params = request.getParams();
              // default print rw
              boolean readOnly = (params != null)
                  && params.containsKey("type")
                  && params.get("type").equals("ro");
              // default not print hostname
              boolean printHostname = (params != null)
                  && params.containsKey("print_hostnames")
                  && params.get("print_hostnames").equals("true");
  
              if (readOnly) {
                  bookies.addAll(bka.getReadOnlyBookies());
              } else {
                  bookies.addAll(bka.getAvailableBookies());
              }
  
              // output <bookieSocketAddress: hostname>
              Map<String, String> output = Maps.newHashMap();
              for (BookieId b : bookies) {
                  String hostname = null;
                  if (printHostname) {
                      BookieSocketAddress resolved = bka.getBookieAddressResolver().resolve(b);
                      hostname = resolved.getHostName();
                  }
                  output.putIfAbsent(b.toString(), hostname);
                  if (LOG.isDebugEnabled()) {
                      LOG.debug("bookie: " + b + " hostname:" + hostname);
                  }
              }
              String jsonResponse = JsonUtil.toJson(output);
  
              response.setBody(jsonResponse);
              response.setCode(HttpServer.StatusCode.OK);
              return response;
          } else {
              response.setCode(HttpServer.StatusCode.NOT_FOUND);
              response.setBody("Not found method. Should be GET method");
              return response;
          }
      }
  }
  