How to use

popFirstNonOption

method

in

org.apache.hadoop.util.StringUtils

private int removeSpanReceiver(List<String> args) throws IOException {
 String indexStr = StringUtils.popFirstNonOption(args);
 long id = -1;
 try {
  id = Long.parseLong(indexStr);
 } catch (NumberFormatException e) {
  System.err.println("Failed to parse ID string " +
    indexStr + ": " + e.getMessage());
  return 1;
 }
 remote.removeSpanReceiver(id);
 System.err.println("Removed trace span receiver " + id);
 return 0;
}

 @Override
 public int run(Configuration conf, List<String> args) throws IOException {
  String name = StringUtils.popFirstNonOption(args);
  if (name == null) {
   System.err.println("You must specify a name when deleting a " +
     "cache pool.");
   return 1;
  }
  if (!args.isEmpty()) {
   System.err.print("Can't understand arguments: " +
    Joiner.on(" ").join(args) + "\n");
   System.err.println("Usage is " + getShortUsage());
   return 1;
  }
  DistributedFileSystem dfs = AdminHelper.getDFS(conf);
  try {
   dfs.removeCachePool(name);
  } catch (IOException e) {
   System.err.println(AdminHelper.prettifyException(e));
   return 2;
  }
  System.out.println("Successfully removed cache pool " + name + ".");
  return 0;
 }
}

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String idString= StringUtils.popFirstNonOption(args);
 if (idString == null) {
  System.err.println("You must specify a directive ID to remove.");

String hostPort = StringUtils.popFirstNonOption(args);
if (hostPort == null) {
 System.err.println("You must specify a host:port pair.");

 return 1;
String name = StringUtils.popFirstNonOption(args);
if (name == null) {
 System.err.println("You must specify a name when creating a " +

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String name = StringUtils.popFirstNonOption(args);
 if (name == null) {
  System.err.println("You must specify a name when creating a " +

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String name = StringUtils.popFirstNonOption(args);
 final boolean printStats = StringUtils.popOption("-stats", args);
 if (!args.isEmpty()) {

private int removeSpanReceiver(List<String> args) throws IOException {
 String indexStr = StringUtils.popFirstNonOption(args);
 long id = -1;
 try {
  id = Long.parseLong(indexStr);
 } catch (NumberFormatException e) {
  System.err.println("Failed to parse ID string " +
    indexStr + ": " + e.getMessage());
  return 1;
 }
 remote.removeSpanReceiver(id);
 System.err.println("Removed trace span receiver " + id);
 return 0;
}

private int removeSpanReceiver(List<String> args) throws IOException {
 String indexStr = StringUtils.popFirstNonOption(args);
 long id = -1;
 try {
  id = Long.parseLong(indexStr);
 } catch (NumberFormatException e) {
  System.err.println("Failed to parse ID string " +
    indexStr + ": " + e.getMessage());
  return 1;
 }
 remote.removeSpanReceiver(id);
 System.err.println("Removed trace span receiver " + id);
 return 0;
}

private int removeSpanReceiver(List<String> args) throws IOException {
 String indexStr = StringUtils.popFirstNonOption(args);
 long id = -1;
 try {
  id = Long.parseLong(indexStr);
 } catch (NumberFormatException e) {
  System.err.println("Failed to parse ID string " +
    indexStr + ": " + e.getMessage());
  return 1;
 }
 remote.removeSpanReceiver(id);
 System.err.println("Removed trace span receiver " + id);
 return 0;
}

private int removeSpanReceiver(List<String> args) throws IOException {
 String indexStr = StringUtils.popFirstNonOption(args);
 long id = -1;
 try {
  id = Long.parseLong(indexStr);
 } catch (NumberFormatException e) {
  System.err.println("Failed to parse ID string " +
    indexStr + ": " + e.getMessage());
  return 1;
 }
 remote.removeSpanReceiver(id);
 System.err.println("Removed trace span receiver " + id);
 return 0;
}

 @Override
 public int run(Configuration conf, List<String> args) throws IOException {
  String name = StringUtils.popFirstNonOption(args);
  if (name == null) {
   System.err.println("You must specify a name when deleting a " +
     "cache pool.");
   return 1;
  }
  if (!args.isEmpty()) {
   System.err.print("Can't understand arguments: " +
    Joiner.on(" ").join(args) + "\n");
   System.err.println("Usage is " + getShortUsage());
   return 1;
  }
  DistributedFileSystem dfs = AdminHelper.getDFS(conf);
  try {
   dfs.removeCachePool(name);
  } catch (IOException e) {
   System.err.println(AdminHelper.prettifyException(e));
   return 2;
  }
  System.out.println("Successfully removed cache pool " + name + ".");
  return 0;
 }
}

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String idString= StringUtils.popFirstNonOption(args);
 if (idString == null) {
  System.err.println("You must specify a directive ID to remove.");

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String idString= StringUtils.popFirstNonOption(args);
 if (idString == null) {
  System.err.println("You must specify a directive ID to remove.");

String hostPort = StringUtils.popFirstNonOption(args);
if (hostPort == null) {
 System.err.println("You must specify a host:port pair.");

 @Override
 public int run(Configuration conf, List<String> args) throws IOException {
  String name = StringUtils.popFirstNonOption(args);
  if (name == null) {
   System.err.println("You must specify a name when deleting a " +
     "cache pool.");
   return 1;
  }
  if (!args.isEmpty()) {
   System.err.print("Can't understand arguments: " +
    Joiner.on(" ").join(args) + "\n");
   System.err.println("Usage is " + getShortUsage());
   return 1;
  }
  DistributedFileSystem dfs = AdminHelper.getDFS(conf);
  try {
   dfs.removeCachePool(name);
  } catch (IOException e) {
   System.err.println(AdminHelper.prettifyException(e));
   return 2;
  }
  System.out.println("Successfully removed cache pool " + name + ".");
  return 0;
 }
}

String hostPort = StringUtils.popFirstNonOption(args);
if (hostPort == null) {
 System.err.println("You must specify a host:port pair.");

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String name = StringUtils.popFirstNonOption(args);
 if (name == null) {
  System.err.println("You must specify a name when creating a " +

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String name = StringUtils.popFirstNonOption(args);
 final boolean printStats = StringUtils.popOption("-stats", args);
 if (!args.isEmpty()) {

@Override
public int run(Configuration conf, List<String> args) throws IOException {
 String name = StringUtils.popFirstNonOption(args);
 if (name == null) {
  System.err.println("You must specify a name when creating a " +