/**
* This function displays the first 5KB of a file if it is in ASCII format.
*
* @param path The path of the file to display
* @param request The HttpServletRequest object
* @throws FileDoesNotExistException
* @throws IOException
* @throws InvalidPathException
* @throws TException
*/
private void displayFile(String path, HttpServletRequest request)
throws FileDoesNotExistException, InvalidPathException, IOException {
TachyonClient tachyonClient = TachyonClient.getClient(mMasterInfo.getMasterAddress());
TachyonFile tFile = tachyonClient.getFile(path);
if (tFile == null) {
throw new FileDoesNotExistException(path);
}
InStream is = tFile.getInStream(OpType.READ_NO_CACHE);
int len = Math.min(5 * Constants.KB, (int) tFile.getSize());
byte[] data = new byte[len];
is.read(data, 0, len);
String fileData = CommonUtils.convertByteArrayToString(data);
if (fileData == null) {
fileData = "The requested file is not completely encoded in ascii";
}
is.close();
try {
tachyonClient.close();
} catch (TException e) {
LOG.error(e.getMessage());
}
request.setAttribute("fileData", fileData);
return;
}
