How to use

getPaths

method

in

org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor

@Private
@VisibleForTesting
protected ContainerLocalizer createContainerLocalizer(String user,
  String appId, String locId, List<String> localDirs,
  FileContext localizerFc, String userFolder) throws IOException {
 ContainerLocalizer localizer =
   new ContainerLocalizer(localizerFc, user, appId, locId,
     getPaths(localDirs),
     RecordFactoryProvider.getRecordFactory(getConf()), userFolder);
 return localizer;
}

/**
 * Create a new {@link ContainerLocalizer} instance.
 *
 * @param user the user who owns the job for which the localization is being
 * run
 * @param appId the ID of the application for which the localization is being
 * run
 * @param locId the ID of the container for which the localization is being
 * run
 * @param localDirs a list of directories to use as destinations for the
 * localization
 * @param localizerFc the {@link FileContext} to use when localizing files
 * @return the new {@link ContainerLocalizer} instance
 * @throws IOException if {@code user} or {@code locId} is {@code null} or if
 * the container localizer has an initialization failure
 */
@Private
@VisibleForTesting
protected ContainerLocalizer createContainerLocalizer(String user,
  String appId, String locId, List<String> localDirs,
  FileContext localizerFc) throws IOException {
 ContainerLocalizer localizer =
   new ContainerLocalizer(localizerFc, user, appId, locId,
     getPaths(localDirs),
     RecordFactoryProvider.getRecordFactory(getConf()));
 return localizer;
}

@Override
public void startLocalizer(Path nmPrivateContainerTokensPath,
  InetSocketAddress nmAddr, String user, String appId, String locId,
  LocalDirsHandlerService dirsHandler)
  throws IOException, InterruptedException {
 List<String> localDirs = dirsHandler.getLocalDirs();
 List<String> logDirs = dirsHandler.getLogDirs();
 
 createUserLocalDirs(localDirs, user);
 createUserCacheDirs(localDirs, user);
 createAppDirs(localDirs, user, appId);
 createAppLogDirs(appId, logDirs, user);
 // randomly choose the local directory
 Path appStorageDir = getWorkingDir(localDirs, user, appId);
 String tokenFn = String.format(ContainerLocalizer.TOKEN_FILE_NAME_FMT, locId);
 Path tokenDst = new Path(appStorageDir, tokenFn);
 copyFile(nmPrivateContainerTokensPath, tokenDst, user);
 LOG.info("Copying from " + nmPrivateContainerTokensPath + " to " + tokenDst);
 FileContext localizerFc = FileContext.getFileContext(
   lfs.getDefaultFileSystem(), getConf());
 localizerFc.setUMask(lfs.getUMask());
 localizerFc.setWorkingDirectory(appStorageDir);
 LOG.info("Localizer CWD set to " + appStorageDir + " = " 
   + localizerFc.getWorkingDirectory());
 ContainerLocalizer localizer =
   new ContainerLocalizer(localizerFc, user, appId, locId, 
     getPaths(localDirs), RecordFactoryProvider.getRecordFactory(getConf()));
 // TODO: DO it over RPC for maintaining similarity?
 localizer.runLocalization(nmAddr);
}

@Override
public void startLocalizer(Path nmPrivateContainerTokensPath,
  InetSocketAddress nmAddr, String user, String appId, String locId,
  LocalDirsHandlerService dirsHandler)
  throws IOException, InterruptedException {
 List<String> localDirs = dirsHandler.getLocalDirs();
 List<String> logDirs = dirsHandler.getLogDirs();
 
 createUserLocalDirs(localDirs, user);
 createUserCacheDirs(localDirs, user);
 createAppDirs(localDirs, user, appId);
 createAppLogDirs(appId, logDirs, user);
 // randomly choose the local directory
 Path appStorageDir = getWorkingDir(localDirs, user, appId);
 String tokenFn = String.format(ContainerLocalizer.TOKEN_FILE_NAME_FMT, locId);
 Path tokenDst = new Path(appStorageDir, tokenFn);
 copyFile(nmPrivateContainerTokensPath, tokenDst, user);
 LOG.info("Copying from " + nmPrivateContainerTokensPath + " to " + tokenDst);
 FileContext localizerFc = FileContext.getFileContext(
   lfs.getDefaultFileSystem(), getConf());
 localizerFc.setUMask(lfs.getUMask());
 localizerFc.setWorkingDirectory(appStorageDir);
 LOG.info("Localizer CWD set to " + appStorageDir + " = " 
   + localizerFc.getWorkingDirectory());
 ContainerLocalizer localizer =
   new ContainerLocalizer(localizerFc, user, appId, locId, 
     getPaths(localDirs), RecordFactoryProvider.getRecordFactory(getConf()));
 // TODO: DO it over RPC for maintaining similarity?
 localizer.runLocalization(nmAddr);
}