Examples with TransactionCommitted io.pravega.shared.protocol.netty.WireCommands.TransactionCommitted used on opensource projects

Example 1 with TransactionCommitted

use of io.pravega.shared.protocol.netty.WireCommands.TransactionCommitted in project pravega by pravega.

the class PravegaRequestProcessor method commitTransaction.

@Override
public void commitTransaction(CommitTransaction commitTx) {
    String transactionName = StreamSegmentNameUtils.getTransactionNameFromId(commitTx.getSegment(), commitTx.getTxid());
    long requestId = commitTx.getRequestId();
    log.debug("Committing transaction {} ", commitTx);
    if (!verifyToken(commitTx.getSegment(), commitTx.getRequestId(), commitTx.getDelegationToken(), READ_UPDATE, "Commit Transaction")) {
        return;
    }
    // Seal and Merge can execute concurrently, as long as they are invoked in the correct order (first Seal, then Merge).
    // If Seal fails for whatever reason (except already sealed), then Merge will also fail because the txn is not sealed,
    // but invoking them in parallel does provide benefits in terms of reduced latency.
    val seal = segmentStore.sealStreamSegment(transactionName, TIMEOUT).exceptionally(this::ignoreSegmentSealed).thenCompose(v -> recordStatForTransaction(transactionName, commitTx.getSegment()).exceptionally(e -> {
        // gobble up any errors from stat recording so we do not affect rest of the flow.
        log.error("exception while computing stats while merging txn {}", e);
        return null;
    }));
    val merge = segmentStore.mergeTransaction(transactionName, TIMEOUT).thenAccept(v -> connection.send(new TransactionCommitted(requestId, commitTx.getSegment(), commitTx.getTxid())));
    CompletableFuture.allOf(seal, merge).exceptionally(e -> {
        if (Exceptions.unwrap(e) instanceof StreamSegmentMergedException) {
            log.info("Stream segment is already merged '{}'.", transactionName);
            connection.send(new TransactionCommitted(requestId, commitTx.getSegment(), commitTx.getTxid()));
            return null;
        } else {
            return handleException(requestId, transactionName, "Commit transaction", e);
        }
    });
}