@Override
public StreamSqlResult execute(ExecutionContext c) throws StreamSqlException {
YarchDatabase dict = YarchDatabase.getInstance(c.getDbName());
// locking of the dictionary is performed inside the close
Stream s = dict.getStream(name);
if (s == null) throw new ResourceNotFoundException(name);
s.close();
return new StreamSqlResult();
}
private WebSocketReplyData processPublishRequest(
WebSocketDecodeContext ctx, WebSocketDecoder decoder) throws WebSocketException {
YarchDatabase ydb = YarchDatabase.getInstance(processor.getInstance());
StreamData req = decoder.decodeMessageData(ctx, SchemaArchive.StreamData.MERGE).build();
Stream stream = ydb.getStream(req.getStream());
if (stream == null) {
throw new WebSocketException(
ctx.getRequestId(), "Cannot find stream '" + req.getStream() + "'");
}
TupleDefinition tdef = stream.getDefinition();
List<Object> tupleColumns = new ArrayList<>();
// 'fixed' colums
for (ColumnDefinition cdef : stream.getDefinition().getColumnDefinitions()) {
ColumnData providedField = findColumnValue(req, cdef.getName());
if (providedField == null) continue;
if (!providedField.hasValue()) {
throw new WebSocketException(
ctx.getRequestId(), "No value was provided for column " + cdef.getName());
}
Object column =
makeTupleColumn(ctx, cdef.getName(), providedField.getValue(), cdef.getType());
tupleColumns.add(column);
}
// 'dynamic' columns
for (ColumnData val : req.getColumnList()) {
if (stream.getDefinition().getColumn(val.getName()) == null) {
DataType type = dataTypeFromValue(val.getValue());
tdef.addColumn(val.getName(), type);
Object column = makeTupleColumn(ctx, val.getName(), val.getValue(), type);
tupleColumns.add(column);
}
}
Tuple t = new Tuple(tdef, tupleColumns);
log.info("Emitting tuple {} to {}", t, stream.getName());
stream.emitTuple(t);
return toAckReply(ctx.getRequestId());
}
private WebSocketReplyData processSubscribeRequest(
WebSocketDecodeContext ctx, WebSocketDecoder decoder) throws WebSocketException {
YarchDatabase ydb = YarchDatabase.getInstance(processor.getInstance());
// Optionally read body. If it's not provided, suppose the subscription concerns
// the stream of the current processor (TODO currently doesn't work with JSON).
Stream stream;
if (ctx.getData() != null) { // Check doesn't work with JSON, always returns JsonParser
StreamSubscribeRequest req =
decoder.decodeMessageData(ctx, SchemaRest.StreamSubscribeRequest.MERGE).build();
if (req.hasStream()) {
stream = ydb.getStream(req.getStream());
} else {
throw new WebSocketException(ctx.getRequestId(), "No stream was provided");
}
} else {
stream = ydb.getStream(processor.getName());
}
StreamSubscriber subscriber =
new StreamSubscriber() {
@Override
public void onTuple(Stream stream, Tuple tuple) {
StreamData data = ArchiveHelper.toStreamData(stream, tuple);
try {
wsHandler.sendData(ProtoDataType.STREAM_DATA, data, SchemaArchive.StreamData.WRITE);
} catch (IOException e) {
log.debug("Could not send tuple data", e);
}
}
@Override
public void streamClosed(Stream stream) {}
};
stream.addSubscriber(subscriber);
subscriptions.add(new Subscription(stream, subscriber));
return toAckReply(ctx.getRequestId());
}