Examples with MIN_DATA_STREAM_ID org.apache.bookkeeper.stream.protocol.ProtocolConstants.MIN_DATA_STREAM_ID used on opensource projects

Example 1 with MIN_DATA_STREAM_ID

use of org.apache.bookkeeper.stream.protocol.ProtocolConstants.MIN_DATA_STREAM_ID in project bookkeeper by apache.

the class RootRangeStoreImpl method executeCreateStreamTxn.

private CompletableFuture<CreateStreamResponse> executeCreateStreamTxn(long nsId, String streamName, StreamConfiguration streamConf, long currentStreamId, long currentStreamIdRev) {
    long streamId;
    if (currentStreamId < 0) {
        streamId = MIN_DATA_STREAM_ID;
    } else {
        streamId = currentStreamId + 1;
    }
    long scId = placementPolicy.placeStreamRange(streamId, 0L);
    StreamConfiguration newStreamConf = streamConf;
    // no backend service url is provided, use the default service url
    if (isBlank(streamConf.getBackendServiceUrl())) {
        newStreamConf = StreamConfiguration.newBuilder(streamConf).setBackendServiceUrl(defaultServiceUri.toString()).build();
    }
    StreamProperties streamProps = StreamProperties.newBuilder().setStreamId(streamId).setStreamName(streamName).setStorageContainerId(scId).setStreamConf(newStreamConf).build();
    byte[] nsIdKey = getNamespaceIdKey(nsId);
    byte[] streamNameKey = getStreamNameKey(nsId, streamName);
    byte[] streamNameVal = Bytes.toBytes(streamId);
    byte[] streamIdKey = getStreamIdKey(nsId, streamId);
    byte[] streamIdVal = streamProps.toByteArray();
    TxnOp<byte[], byte[]> txn = store.newTxn().If(store.newCompareValue(CompareResult.NOT_EQUAL, nsIdKey, null), currentStreamIdRev < 0 ? store.newCompareValue(CompareResult.EQUAL, STREAM_ID_KEY, null) : store.newCompareModRevision(CompareResult.EQUAL, STREAM_ID_KEY, currentStreamIdRev), store.newCompareValue(CompareResult.EQUAL, streamNameKey, null)).Then(store.newPut(streamNameKey, streamNameVal), store.newPut(streamIdKey, streamIdVal), store.newPut(STREAM_ID_KEY, Bytes.toBytes(streamId))).build();
    return store.txn(txn).thenApply(txnResult -> {
        try {
            CreateStreamResponse.Builder respBuilder = CreateStreamResponse.newBuilder();
            if (txnResult.isSuccess()) {
                respBuilder.setCode(StatusCode.SUCCESS);
                respBuilder.setStreamProps(streamProps);
            } else {
                // TODO: differentiate the error codes
                respBuilder.setCode(StatusCode.INTERNAL_SERVER_ERROR);
            }
            return respBuilder.build();
        } finally {
            txnResult.close();
            txn.close();
        }
    }).exceptionally(cause -> {
        txn.close();
        return CreateStreamResponse.newBuilder().setCode(StatusCode.INTERNAL_SERVER_ERROR).build();
    });
}