Examples with MergeJournalContext alluxio.master.journal.MergeJournalContext used on opensource projects

Example 1 with MergeJournalContext

use of alluxio.master.journal.MergeJournalContext in project alluxio by Alluxio.

the class InodeSyncStream method loadFileMetadataInternal.

/**
 * Loads metadata for the file identified by the given path from UFS into Alluxio.
 *
 * This method doesn't require any specific type of locking on inodePath. If the path needs to be
 * loaded, we will acquire a write-edge lock.
 *
 * @param rpcContext the rpc context
 * @param inodePath the path for which metadata should be loaded
 * @param resolution the UFS resolution of path
 * @param context the load metadata context
 */
static void loadFileMetadataInternal(RpcContext rpcContext, LockedInodePath inodePath, MountTable.Resolution resolution, LoadMetadataContext context, DefaultFileSystemMaster fsMaster) throws BlockInfoException, FileDoesNotExistException, InvalidPathException, FileAlreadyCompletedException, InvalidFileSizeException, IOException {
    if (inodePath.fullPathExists()) {
        return;
    }
    AlluxioURI ufsUri = resolution.getUri();
    long ufsBlockSizeByte;
    long ufsLength;
    AccessControlList acl = null;
    try (CloseableResource<UnderFileSystem> ufsResource = resolution.acquireUfsResource()) {
        UnderFileSystem ufs = ufsResource.get();
        if (context.getUfsStatus() == null) {
            context.setUfsStatus(ufs.getExistingFileStatus(ufsUri.toString()));
        }
        ufsLength = ((UfsFileStatus) context.getUfsStatus()).getContentLength();
        long blockSize = ((UfsFileStatus) context.getUfsStatus()).getBlockSize();
        ufsBlockSizeByte = blockSize != UfsFileStatus.UNKNOWN_BLOCK_SIZE ? blockSize : ufs.getBlockSizeByte(ufsUri.toString());
        if (fsMaster.isAclEnabled()) {
            Pair<AccessControlList, DefaultAccessControlList> aclPair = ufs.getAclPair(ufsUri.toString());
            if (aclPair != null) {
                acl = aclPair.getFirst();
                // DefaultACL should be null, because it is a file
                if (aclPair.getSecond() != null) {
                    LOG.warn("File {} has default ACL in the UFS", inodePath.getUri());
                }
            }
        }
    }
    // Metadata loaded from UFS has no TTL set.
    CreateFileContext createFileContext = CreateFileContext.defaults();
    createFileContext.getOptions().setBlockSizeBytes(ufsBlockSizeByte);
    createFileContext.getOptions().setRecursive(context.getOptions().getCreateAncestors());
    createFileContext.getOptions().setCommonOptions(FileSystemMasterCommonPOptions.newBuilder().setTtl(context.getOptions().getCommonOptions().getTtl()).setTtlAction(context.getOptions().getCommonOptions().getTtlAction()));
    // set as through since already in UFS
    createFileContext.setWriteType(WriteType.THROUGH);
    createFileContext.setMetadataLoad(true);
    createFileContext.setOwner(context.getUfsStatus().getOwner());
    createFileContext.setGroup(context.getUfsStatus().getGroup());
    createFileContext.setXAttr(context.getUfsStatus().getXAttr());
    short ufsMode = context.getUfsStatus().getMode();
    Mode mode = new Mode(ufsMode);
    Long ufsLastModified = context.getUfsStatus().getLastModifiedTime();
    if (resolution.getShared()) {
        mode.setOtherBits(mode.getOtherBits().or(mode.getOwnerBits()));
    }
    createFileContext.getOptions().setMode(mode.toProto());
    if (acl != null) {
        createFileContext.setAcl(acl.getEntries());
    }
    if (ufsLastModified != null) {
        createFileContext.setOperationTimeMs(ufsLastModified);
    }
    try (LockedInodePath writeLockedPath = inodePath.lockFinalEdgeWrite();
        MergeJournalContext merger = new MergeJournalContext(rpcContext.getJournalContext(), writeLockedPath.getUri(), InodeSyncStream::mergeCreateComplete)) {
        // We do not want to close this wrapRpcContext because it uses elements from another context
        RpcContext wrapRpcContext = new RpcContext(rpcContext.getBlockDeletionContext(), merger, rpcContext.getOperationContext());
        fsMaster.createFileInternal(wrapRpcContext, writeLockedPath, createFileContext);
        CompleteFileContext completeContext = CompleteFileContext.mergeFrom(CompleteFilePOptions.newBuilder().setUfsLength(ufsLength)).setUfsStatus(context.getUfsStatus());
        if (ufsLastModified != null) {
            completeContext.setOperationTimeMs(ufsLastModified);
        }
        fsMaster.completeFileInternal(wrapRpcContext, writeLockedPath, completeContext);
    } catch (FileAlreadyExistsException e) {
        // This may occur if a thread created or loaded the file before we got the write lock.
        // The file already exists, so nothing needs to be loaded.
        LOG.debug("Failed to load file metadata: {}", e.toString());
    }
    // Re-traverse the path to pick up any newly created inodes.
    inodePath.traverse();
}