Re: count and window question with kafka

Posted by Tony Wei on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/count-and-window-question-with-kafka-tp16484p16489.html

Hi,

I think ProcessFunction[1] is what you want. You can add it after keyBy and emit the result to sink after timeout or buffer filled.

The reference has a good example that show you how to use it.

Best Regards,

Tony Wei

[1] https://ci.apache.org/projects/flink/flink-docs-release-1.3/dev/stream/process_function.html

2017-10-30 23:56 GMT+08:00 Telco Phone <[hidden email]>:

I have a process that will take 250,000 records from kafka and produce a file. (Using a CustomFileSync) 

Currently I just have the following:

DataStream<SchemaRecord> stream =

env.addSource(new FlinkKafkaConsumer010<SchemaRecord>("topic"", schema, properties)).setParallelism(40).flatMap(new SchemaRecordSplit()).setParallelism(40).name("Splitter").keyBy("partition", "randomkey", "schemaId");

stream.addSink(new CustomFileSystemSink()).setParallelism(40);

In my CustomFileSystemSink I have a for..next loop which closes the file off at 250K rows.

What I am looking to do is to close off the file every 5 min OR 250K rows...

As I read the window types is it possible to read from kafka and have the sink close every 5 min OR 250K rows ?

Hope this makes sense....