Examples with MetadataCheckpointOperation io.pravega.segmentstore.server.logs.operations.MetadataCheckpointOperation used on opensource projects

Example 11 with MetadataCheckpointOperation

use of io.pravega.segmentstore.server.logs.operations.MetadataCheckpointOperation in project pravega by pravega.

the class DurableLog method truncate.

@Override
public CompletableFuture<Void> truncate(long upToSequenceNumber, Duration timeout) {
    ensureRunning();
    Preconditions.checkArgument(this.metadata.isValidTruncationPoint(upToSequenceNumber), "Invalid Truncation Point. Must refer to a MetadataCheckpointOperation.");
    // The SequenceNumber we were given points directly to a MetadataCheckpointOperation. We must not remove it!
    // Instead, it must be the first operation that does survive, so we need to adjust our SeqNo to the one just
    // before it.
    long actualTruncationSequenceNumber = upToSequenceNumber - 1;
    // Find the closest Truncation Marker (that does not exceed it).
    LogAddress truncationFrameAddress = this.metadata.getClosestTruncationMarker(actualTruncationSequenceNumber);
    if (truncationFrameAddress == null) {
        // Nothing to truncate.
        return CompletableFuture.completedFuture(null);
    }
    TimeoutTimer timer = new TimeoutTimer(timeout);
    log.info("{}: Truncate (OperationSequenceNumber = {}, DataFrameAddress = {}).", this.traceObjectId, upToSequenceNumber, truncationFrameAddress);
    // info will be readily available upon recovery without delay.
    return add(new StorageMetadataCheckpointOperation(), timer.getRemaining()).thenComposeAsync(v -> this.durableDataLog.truncate(truncationFrameAddress, timer.getRemaining()), this.executor).thenRunAsync(() -> {
        // Truncate InMemory Transaction Log.
        int count = this.inMemoryOperationLog.truncate(actualTruncationSequenceNumber);
        // Remove old truncation markers.
        this.metadata.removeTruncationMarkers(actualTruncationSequenceNumber);
        this.operationProcessor.getMetrics().operationLogTruncate(count);
    }, this.executor);
}