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.tools.cli.commands.bookies;
  
  import java.io.IOException;
  import java.math.RoundingMode;
  import java.text.DecimalFormat;
  import java.util.Map;
  import java.util.stream.Collectors;
  import org.apache.bookkeeper.client.BKException;
  import org.apache.bookkeeper.client.BookKeeper;
  import org.apache.bookkeeper.client.BookieInfoReader.BookieInfo;
  import org.apache.bookkeeper.conf.ClientConfiguration;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.net.BookieId;
  import org.apache.bookkeeper.tools.cli.helpers.BookieCommand;
  import org.apache.bookkeeper.tools.cli.helpers.CommandHelpers;
  import org.apache.bookkeeper.tools.framework.CliFlags;
  import org.apache.bookkeeper.tools.framework.CliSpec;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * A bookie command to retrieve bookie info.
   */
  public class InfoCommand extends BookieCommand<CliFlags> {
  
      private static final String NAME = "info";
      private static final String DESC = "Retrieve bookie info such as free and total disk space.";
      private static final Logger LOG = LoggerFactory.getLogger(InfoCommand.class);
  
      public InfoCommand() {
          super(CliSpec.newBuilder()
              .withName(NAME)
              .withFlags(new CliFlags())
              .withDescription(DESC)
              .build());
      }
  
      String getReadable(long val) {
          String[] unit = {"", "KB", "MB", "GB", "TB"};
          int cnt = 0;
          double d = val;
          while (d >= 1000 && cnt < unit.length - 1) {
              d = d / 1000;
              cnt++;
          }
          DecimalFormat df = new DecimalFormat("#.###");
          df.setRoundingMode(RoundingMode.DOWN);
          return cnt > 0 ? "(" + df.format(d) + unit[cnt] + ")" : unit[cnt];
      }
  
  
      @Override
      public boolean apply(ServerConfiguration conf, CliFlags cmdFlags) {
  
          ClientConfiguration clientConf = new ClientConfiguration(conf);
          clientConf.setDiskWeightBasedPlacementEnabled(true);
          try (BookKeeper bk = new BookKeeper(clientConf)) {
              Map<BookieId, BookieInfo> map = bk.getBookieInfo();
              if (map.size() == 0) {
                  LOG.info("Failed to retrieve bookie information from any of the bookies");
                  bk.close();
                  return true;
              }
  
              LOG.info("Free disk space info:");
              long totalFree = 0, total = 0;
              for (Map.Entry<BookieId, BookieInfo> e : map.entrySet()) {
                  BookieInfo bInfo = e.getValue();
                  BookieId bookieId = e.getKey();
                  LOG.info("{}: \tFree: {}\tTotal: {}",
                      CommandHelpers.getBookieSocketAddrStringRepresentation(bookieId, bk.getBookieAddressResolver()),
                      bInfo.getFreeDiskSpace() + getReadable(bInfo.getFreeDiskSpace()),
                      bInfo.getTotalDiskSpace() + getReadable(bInfo.getTotalDiskSpace()));
              }
  
              // group by hostname
              Map<String, BookieInfo> dedupedMap = map.entrySet()
                  .stream()
                  .collect(Collectors.toMap(
                      entry -> entry.getKey().toString(),
                      entry -> entry.getValue(),
                      (key1, key2) -> key2
                  ));
              for (BookieInfo bookieInfo : dedupedMap.values()) {
                  totalFree += bookieInfo.getFreeDiskSpace();
                  total += bookieInfo.getTotalDiskSpace();
              }
  
              LOG.info("Total free disk space in the cluster:\t{}", totalFree + getReadable(totalFree));
              LOG.info("Total disk capacity in the cluster:\t{}", total + getReadable(total));
              bk.close();
  
              return true;
          } catch (IOException | InterruptedException | BKException e) {
              e.printStackTrace();
          }
          return true;
      }
  }
  