Examples of org.apache.hadoop.hdfs.protocol.HdfsFileStatus

org.apache.hadoop.hdfs.protocol.HdfsFileStatus
Interface that represents the over the wire information for a file.

          final String path = ServletUtil.getDecodedPath(request, "/data");
          final String encodedPath = ServletUtil.getRawPath(request, "/data");
          String delegationToken = request
              .getParameter(JspHelper.DELEGATION_PARAMETER_NAME);


          HdfsFileStatus info = nn.getFileInfo(path);
          if (info != null && !info.isDir()) {
            response.sendRedirect(createRedirectURL(path, encodedPath,
                info, ugi, nn, request, delegationToken).toString());
          } else if (info == null) {
            response.sendError(400, "File not found " + path);
          } else {

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      INodeDirectory dirInode = (INodeDirectory)targetNode;
      List<INode> contents = dirInode.getChildren();
      int startChild = dirInode.nextChild(startAfter);
      int totalNumChildren = contents.size();
      int numOfListing = Math.min(totalNumChildren-startChild, this.lsLimit);
      HdfsFileStatus listing[] = new HdfsFileStatus[numOfListing];
      for (int i=0; i<numOfListing; i++) {
        INode cur = contents.get(startChild+i);
        listing[i] = createFileStatus(cur.name, cur, needLocation);
      }
      return new DirectoryListing(

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       INodeFile fileNode = (INodeFile)node;
       size = fileNode.computeFileSize(true);
       replication = fileNode.getReplication();
       blocksize = fileNode.getPreferredBlockSize();
     }
     return new HdfsFileStatus(
        size, 
        node.isDirectory(), 
        replication, 
        blocksize,
        node.getModificationTime(),

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   * @throws FileNotFoundException if the file does not exist.
   */
  @Override
  public FileStatus getFileStatus(Path f) throws IOException {
    statistics.incrementReadOps(1);
    HdfsFileStatus fi = dfs.getFileInfo(getPathName(f));
    if (fi != null) {
      return makeQualified(fi, f);
    } else {
      throw new FileNotFoundException("File does not exist: " + f);
    }

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      GetFileInfoResponseProto.newBuilder().build();
  @Override
  public GetFileInfoResponseProto getFileInfo(RpcController controller,
      GetFileInfoRequestProto req) throws ServiceException {
    try {
      HdfsFileStatus result = server.getFileInfo(req.getSrc());
 
      if (result != null) {
        return GetFileInfoResponseProto.newBuilder().setFs(
            PBHelper.convert(result)).build();
      }

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      GetFileLinkInfoResponseProto.newBuilder().build();
  @Override
  public GetFileLinkInfoResponseProto getFileLinkInfo(RpcController controller,
      GetFileLinkInfoRequestProto req) throws ServiceException {
    try {
      HdfsFileStatus result = server.getFileLinkInfo(req.getSrc());
      if (result != null) {
        System.out.println("got non null result for getFileLinkInfo for " + req.getSrc());
        return GetFileLinkInfoResponseProto.newBuilder().setFs(
            PBHelper.convert(result)).build();
      } else {

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  @Override // ClientProtocol
  public String getLinkTarget(String path) throws IOException {
    metrics.incrGetLinkTargetOps();
    try {
      HdfsFileStatus stat = namesystem.getFileInfo(path, false);
      if (stat != null) {
        // NB: getSymlink throws IOException if !stat.isSymlink() 
        return stat.getSymlink();
      }
    } catch (UnresolvedPathException e) {
      return e.getResolvedPath().toString();
    } catch (UnresolvedLinkException e) {
      // The NameNode should only throw an UnresolvedPathException

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          concatDeleteOp.timestamp);
      break;
    }
    case OP_RENAME_OLD: {
      RenameOldOp renameOp = (RenameOldOp)op;
      HdfsFileStatus dinfo = fsDir.getFileInfo(renameOp.dst, false);
      fsDir.unprotectedRenameTo(renameOp.src, renameOp.dst,
                                renameOp.timestamp);
      fsNamesys.unprotectedChangeLease(renameOp.src, renameOp.dst, dinfo);
      break;
    }
    case OP_DELETE: {
      DeleteOp deleteOp = (DeleteOp)op;
      fsDir.unprotectedDelete(deleteOp.path, deleteOp.timestamp);
      break;
    }
    case OP_MKDIR: {
      MkdirOp mkdirOp = (MkdirOp)op;
      fsDir.unprotectedMkdir(mkdirOp.path, mkdirOp.permissions,
                             mkdirOp.timestamp);
      break;
    }
    case OP_SET_GENSTAMP: {
      SetGenstampOp setGenstampOp = (SetGenstampOp)op;
      fsNamesys.setGenerationStamp(setGenstampOp.genStamp);
      break;
    }
    case OP_SET_PERMISSIONS: {
      SetPermissionsOp setPermissionsOp = (SetPermissionsOp)op;
      fsDir.unprotectedSetPermission(setPermissionsOp.src,
                                     setPermissionsOp.permissions);
      break;
    }
    case OP_SET_OWNER: {
      SetOwnerOp setOwnerOp = (SetOwnerOp)op;
      fsDir.unprotectedSetOwner(setOwnerOp.src, setOwnerOp.username,
                                setOwnerOp.groupname);
      break;
    }
    case OP_SET_NS_QUOTA: {
      SetNSQuotaOp setNSQuotaOp = (SetNSQuotaOp)op;
      fsDir.unprotectedSetQuota(setNSQuotaOp.src,
                                setNSQuotaOp.nsQuota,
                                HdfsConstants.QUOTA_DONT_SET);
      break;
    }
    case OP_CLEAR_NS_QUOTA: {
      ClearNSQuotaOp clearNSQuotaOp = (ClearNSQuotaOp)op;
      fsDir.unprotectedSetQuota(clearNSQuotaOp.src,
                                HdfsConstants.QUOTA_RESET,
                                HdfsConstants.QUOTA_DONT_SET);
      break;
    }


    case OP_SET_QUOTA:
      SetQuotaOp setQuotaOp = (SetQuotaOp)op;
      fsDir.unprotectedSetQuota(setQuotaOp.src,
                                setQuotaOp.nsQuota,
                                setQuotaOp.dsQuota);
      break;


    case OP_TIMES: {
      TimesOp timesOp = (TimesOp)op;


      fsDir.unprotectedSetTimes(timesOp.path,
                                timesOp.mtime,
                                timesOp.atime, true);
      break;
    }
    case OP_SYMLINK: {
      SymlinkOp symlinkOp = (SymlinkOp)op;
      fsDir.unprotectedSymlink(symlinkOp.path, symlinkOp.value,
                               symlinkOp.mtime, symlinkOp.atime,
                               symlinkOp.permissionStatus);
      break;
    }
    case OP_RENAME: {
      RenameOp renameOp = (RenameOp)op;


      HdfsFileStatus dinfo = fsDir.getFileInfo(renameOp.dst, false);
      fsDir.unprotectedRenameTo(renameOp.src, renameOp.dst,
                                renameOp.timestamp, renameOp.options);
      fsNamesys.unprotectedChangeLease(renameOp.src, renameOp.dst, dinfo);
      break;
    }

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  }


  private HdfsFileStatus getHdfsFileStatus(Path f) throws IOException {
    final HttpOpParam.Op op = GetOpParam.Op.GETFILESTATUS;
    final Map<?, ?> json = run(op, f);
    final HdfsFileStatus status = JsonUtil.toFileStatus(json, true);
    if (status == null) {
      throw new FileNotFoundException("File does not exist: " + f);
    }
    return status;
  }

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   * Append to an existing file if {@link CreateFlag#APPEND} is present
   */
  private DFSOutputStream primitiveAppend(String src, EnumSet<CreateFlag> flag,
      int buffersize, Progressable progress) throws IOException {
    if (flag.contains(CreateFlag.APPEND)) {
      HdfsFileStatus stat = getFileInfo(src);
      if (stat == null) { // No file to append to
        // New file needs to be created if create option is present
        if (!flag.contains(CreateFlag.CREATE)) {
          throw new FileNotFoundException("failed to append to non-existent file "
              + src + " on client " + clientName);

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org.apache.hadoop.fs.FileStatus

org.apache.hadoop.fs.Hdfs

org.apache.hadoop.fs.LocatedBlockFileStatus

org.apache.hadoop.fs.LocatedFileStatus

org.apache.hadoop.fs.Path

org.apache.hadoop.hdfs.DFSClient

org.apache.hadoop.hdfs.DFSOutputStream

org.apache.hadoop.hdfs.DistributedFileSystem

org.apache.hadoop.hdfs.nfs.mount.RpcProgramMountd

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