/**
* Writes the DataStream to a socket as a byte array. The format of the output is specified by a
* {@link SerializationSchema}.
*
* @param hostName host of the socket
* @param port port of the socket
* @param schema schema for serialization
* @return the closed DataStream
*/
@PublicEvolving
public DataStreamSink<T> writeToSocket(String hostName, int port, SerializationSchema<T> schema) {
DataStreamSink<T> returnStream = addSink(new SocketClientSink<>(hostName, port, schema, 0));
returnStream.setParallelism(
1); // It would not work if multiple instances would connect to the same port
return returnStream;
}
/**
* Adds the given sink to this DataStream. Only streams with sinks added will be executed once the
* {@link StreamExecutionEnvironment#execute()} method is called.
*
* @param sinkFunction The object containing the sink's invoke function.
* @return The closed DataStream.
*/
public DataStreamSink<T> addSink(SinkFunction<T> sinkFunction) {
// read the output type of the input Transform to coax out errors about MissingTypeInfo
transformation.getOutputType();
// configure the type if needed
if (sinkFunction instanceof InputTypeConfigurable) {
((InputTypeConfigurable) sinkFunction).setInputType(getType(), getExecutionConfig());
}
StreamSink<T> sinkOperator = new StreamSink<>(clean(sinkFunction));
DataStreamSink<T> sink = new DataStreamSink<>(this, sinkOperator);
getExecutionEnvironment().addOperator(sink.getTransformation());
return sink;
}