Examples with UfsFileStatus alluxio.underfs.UfsFileStatus used on opensource projects

Example 16 with UfsFileStatus

use of alluxio.underfs.UfsFileStatus in project alluxio by Alluxio.

the class DefaultFileSystemMaster method checkConsistencyInternal.

/**
 * Checks if a path is consistent between Alluxio and the underlying storage.
 * <p>
 * A path without a backing under storage is always consistent.
 * <p>
 * A not persisted path is considered consistent if:
 * 1. It does not shadow an object in the underlying storage.
 * <p>
 * A persisted path is considered consistent if:
 * 1. An equivalent object exists for its under storage path.
 * 2. The metadata of the Alluxio and under storage object are equal.
 *
 * @param inodePath the path to check. This must exist and be read-locked
 * @return true if the path is consistent, false otherwise
 */
private boolean checkConsistencyInternal(LockedInodePath inodePath) throws InvalidPathException, IOException {
    Inode inode;
    try {
        inode = inodePath.getInode();
    } catch (FileDoesNotExistException e) {
        // already checked existence when creating the inodePath
        throw new RuntimeException(e);
    }
    MountTable.Resolution resolution = mMountTable.resolve(inodePath.getUri());
    try (CloseableResource<UnderFileSystem> ufsResource = resolution.acquireUfsResource()) {
        UnderFileSystem ufs = ufsResource.get();
        String ufsPath = resolution.getUri().getPath();
        if (ufs == null) {
            return true;
        }
        if (!inode.isPersisted()) {
            return !ufs.exists(ufsPath);
        }
        UfsStatus ufsStatus;
        try {
            ufsStatus = ufs.getStatus(ufsPath);
        } catch (FileNotFoundException e) {
            return !inode.isPersisted();
        }
        // TODO(calvin): Evaluate which other metadata fields should be validated.
        if (inode.isDirectory()) {
            return ufsStatus.isDirectory();
        } else {
            String ufsFingerprint = Fingerprint.create(ufs.getUnderFSType(), ufsStatus).serialize();
            return ufsStatus.isFile() && (ufsFingerprint.equals(inode.asFile().getUfsFingerprint())) && ufsStatus instanceof UfsFileStatus && ((UfsFileStatus) ufsStatus).getContentLength() == inode.asFile().getLength();
        }
    }
}