WebAug 31, 2024 · 1 Answer Sorted by: 1 Only process functions can use side outputs (which you write to via ctx.output ). A MapFunction automatically sends the return value of its map method downstream (toward the sink). It works this way because a map is a … WebDec 17, 2024 · First of all, a way to implement a sink is to extend RichSinkFunction, and then define three methods : Open: as for a source, opens any element necessary in the sink (connection for instance,...
Extending Flink functions - Agile Lab
WebAug 17, 2024 · 1.任何程序都是需要有输入、处理、输出,Flink专业术语对应Source,map,Sink。提到Flink程序的时候,我们会有Source数据源,然后map其实就 … WebAug 16, 2024 · at org.apache.flink.streaming.api.functions.sink.SinkFunction.invoke (SinkFunction.java:52) at org.apache.flink.streaming.api.operators.StreamSink.processElement (StreamSink.java:56) at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput … ontario greenbelt foundation
flink 学习笔记 — 自定义 Sink 函数 - 简书
You have to override this method when implementing a {@code SinkFunction}, this is a * {@code default} method for backward compatibility with the old-style method only. * * @param value The input record. * @param context Additional context about the input record. * * … Weborigin: org.apache.flink/flink-streaming-java @Override public void processElement(StreamRecord element) throws Exception { sinkContext.element = … WebApr 3, 2024 · config is a parameter of dwsClient, which is the same as that of dwsClient.; context is a global context provided for operations such as cache. It can be specified during dwsClient construction, and is called back each time with the data processing interface. invoke is a function interface used to process data. /** * Execute data processing … ontario greenhouse supply