Examples with SnapshotInfo org.apache.ratis.statemachine.SnapshotInfo used on opensource projects

Example 21 with SnapshotInfo

use of org.apache.ratis.statemachine.SnapshotInfo in project alluxio by Alluxio.

the class SnapshotReplicationManager method sendSnapshotToFollower.

/**
 * Sends a snapshot to a follower.
 *
 * @param responseObserver the response stream observer
 * @return the request stream observer
 */
public StreamObserver<DownloadSnapshotPRequest> sendSnapshotToFollower(StreamObserver<DownloadSnapshotPResponse> responseObserver) {
    SnapshotInfo snapshot = mStorage.getLatestSnapshot();
    LOG.debug("Received snapshot download request from {}", ClientIpAddressInjector.getIpAddress());
    SnapshotUploader<DownloadSnapshotPResponse, DownloadSnapshotPRequest> requestStreamObserver = SnapshotUploader.forLeader(mStorage, snapshot, responseObserver);
    if (snapshot == null) {
        responseObserver.onError(Status.NOT_FOUND.withDescription("Cannot find a valid snapshot to download.").asException());
        return requestStreamObserver;
    }
    responseObserver.onNext(DownloadSnapshotPResponse.newBuilder().setData(SnapshotData.newBuilder().setSnapshotTerm(snapshot.getTerm()).setSnapshotIndex(snapshot.getIndex()).setOffset(0)).build());
    return requestStreamObserver;
}