content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.cli.fsadmin.command;
  
  import alluxio.client.block.BlockWorkerInfo;
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.conf.PropertyKey;
  import alluxio.wire.WorkerNetAddress;
  
  import com.google.common.base.Preconditions;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  /**
   * A util class for worker address -> string conversion.
   */
  public class WorkerAddressUtils {
    /**
     * Parses a string to worker addresses.
     *
     * @param workerAddressesStr the string input
     * @param alluxioConf the conf to rely on
     * @return a list of worker addresses
     */
    public static List<WorkerNetAddress> parseWorkerAddresses(
        String workerAddressesStr, AlluxioConfiguration alluxioConf) {
      List<WorkerNetAddress> result = new ArrayList<>();
      for (String part : workerAddressesStr.split(",")) {
        if (part.contains(":")) {
          String[] p = part.split(":");
          Preconditions.checkState(p.length == 2,
              "worker address %s cannot be recognized", part);
          String port = p[1];
          WorkerNetAddress addr = new WorkerNetAddress()
                  .setHost(p[0]).setWebPort(Integer.parseInt(port));
          result.add(addr);
        } else {
          int port = alluxioConf.getInt(PropertyKey.WORKER_WEB_PORT);
          WorkerNetAddress addr = new WorkerNetAddress().setHost(part).setWebPort(port);
          result.add(addr);
        }
      }
      return result;
    }
  
    /**
     * Convert a list of worker addresses to string.
     *
     * @param workers input worker list
     * @return the string format
     */
    public static String workerAddressListToString(Collection<WorkerNetAddress> workers) {
      return workers.stream().map(WorkerAddressUtils::convertAddressToStringWebPort)
          .collect(Collectors.toList()).toString();
    }
  
    /**
     * Converts a set of worker metadata to string.
     *
     * @param worker a set of workers
     * @return the converted string format
     */
    public static String workerListToString(Set<BlockWorkerInfo> worker) {
      if (worker.isEmpty()) {
        return "[]";
      }
      // Print on a new line
      return "\n" + worker.stream().map(w -> convertAddressToStringWebPort(w.getNetAddress()))
          .collect(Collectors.toList());
    }
  
    /**
     * Converts a worker address to string.
     * To stay consistent with the command, we print the web port of the worker.
     *
     * @param address the worker address
     * @return the string format
     */
    public static String convertAddressToStringWebPort(WorkerNetAddress address) {
      return address.getHost() + ":" + address.getWebPort();
    }
  }
  