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.Lists;
  import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  import java.io.File;
  import java.net.URI;
  import java.util.Arrays;
  import java.util.List;
  import org.apache.bookkeeper.bookie.BookieException;
  import org.apache.bookkeeper.bookie.BookieImpl;
  import org.apache.bookkeeper.bookie.LegacyCookieValidation;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.discover.RegistrationManager;
  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.meta.MetadataBookieDriver;
  import org.apache.bookkeeper.meta.MetadataDrivers;
  import org.apache.bookkeeper.stats.NullStatsLogger;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * HttpEndpointService that handle Bookkeeper expand storage related http request.
   * The PUT method will expand this bookie's storage.
   * User should update the directories info in the conf file with new empty ledger/index
   * directories, before running the command.
   */
  public class ExpandStorageService implements HttpEndpointService {
  
      static final Logger LOG = LoggerFactory.getLogger(ExpandStorageService.class);
  
      protected ServerConfiguration conf;
  
      public ExpandStorageService(ServerConfiguration conf) {
          checkNotNull(conf);
          this.conf = conf;
      }
  
      /*
       * Add new empty ledger/index directories.
       * Update the directories info in the conf file before running the command.
       */
      @Override
      @SuppressFBWarnings("RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE")
      public HttpServiceResponse handle(HttpServiceRequest request) throws Exception {
          HttpServiceResponse response = new HttpServiceResponse();
  
          if (HttpServer.Method.PUT == request.getMethod()) {
              File[] ledgerDirectories = BookieImpl.getCurrentDirectories(conf.getLedgerDirs());
              File[] journalDirectories = BookieImpl.getCurrentDirectories(conf.getJournalDirs());
              File[] indexDirectories;
              if (null == conf.getIndexDirs()) {
                  indexDirectories = ledgerDirectories;
              } else {
                  indexDirectories = BookieImpl.getCurrentDirectories(conf.getIndexDirs());
              }
  
              List<File> allLedgerDirs = Lists.newArrayList();
              allLedgerDirs.addAll(Arrays.asList(ledgerDirectories));
              if (indexDirectories != ledgerDirectories) {
                  allLedgerDirs.addAll(Arrays.asList(indexDirectories));
              }
  
              try (MetadataBookieDriver driver = MetadataDrivers.getBookieDriver(
                           URI.create(conf.getMetadataServiceUri()))) {
                  driver.initialize(conf, NullStatsLogger.INSTANCE);
  
                  try (RegistrationManager registrationManager = driver.createRegistrationManager()) {
                      LegacyCookieValidation validation = new LegacyCookieValidation(conf, registrationManager);
                      List<File> dirs = Lists.newArrayList(journalDirectories);
                      dirs.addAll(allLedgerDirs);
                      validation.checkCookies(dirs);
                  }
              } catch (BookieException e) {
                  LOG.error("Exception occurred while updating cookie for storage expansion", e);
                  response.setCode(HttpServer.StatusCode.INTERNAL_ERROR);
                  response.setBody("Exception while updating cookie for storage expansion");
                  return response;
              }
  
              String jsonResponse = "Success expand storage";
              if (LOG.isDebugEnabled()) {
                  LOG.debug("output body:" + jsonResponse);
              }
              response.setBody(jsonResponse);
              response.setCode(HttpServer.StatusCode.OK);
              return response;
          } else {
              response.setCode(HttpServer.StatusCode.NOT_FOUND);
              response.setBody("Not found method. Should be PUT method");
              return response;
          }
      }
  }
  