在不中断执行的情况下更改 Flink 中的源函数 [英] Change source function in Flink without interrupting the execution
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问题描述
我正在寻找一种解决方案,如何在执行过程中更改 Flink 中的源函数:
I am looking for a solution how I can change a source function in Flink while execution is in progress:
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
SourceFunction<String> mySource = ...; // this a function that I want to change during runtime;
DataStream<String> stream = env.addSource(mySource);
stream.map(...).print(); // creating my stream
env.execute("sample");
我正在考虑围绕 SourceFunction
的实际实现创建一个包装器,它将在需要时替换幕后的实现,但会遇到 SourceContext
的概念.>
I am thinking about creating a wrapper around a real implementation of SourceFunction
that will replace the implementation behind the scenes when needed but come across a notion of SourceContext
.
推荐答案
在 Flink Forward 上有一个演讲,讨论了一些相关问题.我想你会发现它很有帮助.请参阅 Apache Flink 中的引导状态.
There was a talk at Flink Forward that looked at some related issues. I think you'd find it helpful. See Bootstrapping State In Apache Flink.
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