Examples with OpenFlags jnr.constants.platform.OpenFlags used on opensource projects

Example 1 with OpenFlags

use of jnr.constants.platform.OpenFlags in project alluxio by Alluxio.

the class AlluxioFuseFileSystem method create.

/**
   * Creates and opens a new file.
   *
   * @param path The FS path of the file to open
   * @param mode mode flags
   * @param fi FileInfo data struct kept by FUSE
   * @return 0 on success. A negative value on error
   */
@Override
public int create(String path, @mode_t long mode, FuseFileInfo fi) {
    // mode is ignored in alluxio-fuse
    final AlluxioURI turi = mPathResolverCache.getUnchecked(path);
    // (see {@code man 2 open} for the structure of the flags bitfield)
    // File creation flags are the last two bits of flags
    final int flags = fi.flags.get();
    LOG.trace("create({}, {}) [Alluxio: {}]", path, Integer.toHexString(flags), turi);
    final int openFlag = flags & 3;
    if (openFlag != O_WRONLY.intValue()) {
        OpenFlags flag = OpenFlags.valueOf(openFlag);
        LOG.error("Passed a {} flag to create(). Files can only be created in O_WRONLY mode ({})", flag.toString(), path);
        return -ErrorCodes.EACCES();
    }
    try {
        synchronized (mOpenFiles) {
            if (mOpenFiles.size() >= MAX_OPEN_FILES) {
                LOG.error("Cannot open {}: too many open files (MAX_OPEN_FILES: {})", turi, MAX_OPEN_FILES);
                return -ErrorCodes.EMFILE();
            }
            final OpenFileEntry ofe = new OpenFileEntry(null, mFileSystem.createFile(turi));
            LOG.debug("Alluxio OutStream created for {}", path);
            mOpenFiles.put(mNextOpenFileId, ofe);
            fi.fh.set(mNextOpenFileId);
            // Assuming I will never wrap around (2^64 open files are quite a lot anyway)
            mNextOpenFileId += 1;
        }
        LOG.debug("{} created and opened in O_WRONLY mode", path);
    } catch (FileAlreadyExistsException e) {
        LOG.debug("File {} already exists", turi, e);
        return -ErrorCodes.EEXIST();
    } catch (IOException e) {
        LOG.error("IOException on {}", path, e);
        return -ErrorCodes.EIO();
    } catch (AlluxioException e) {
        LOG.error("AlluxioException on {}", path, e);
        return -ErrorCodes.EFAULT();
    } catch (Throwable e) {
        LOG.error("Unexpected exception on {}", path, e);
        return -ErrorCodes.EFAULT();
    }
    return 0;
}