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Posted to dev@flink.apache.org by "Till Rohrmann (Jira)" <ji...@apache.org> on 2020/11/13 16:08:00 UTC

[jira] [Created] (FLINK-20156) JavaDocs of WatermarkStrategy.withTimestampAssigner are wrong wrt Java 8

Till Rohrmann created FLINK-20156:
-------------------------------------

             Summary: JavaDocs of WatermarkStrategy.withTimestampAssigner are wrong wrt Java 8
                 Key: FLINK-20156
                 URL: https://issues.apache.org/jira/browse/FLINK-20156
             Project: Flink
          Issue Type: Improvement
          Components: API / DataStream, Documentation
    Affects Versions: 1.11.2, 1.12.0
            Reporter: Till Rohrmann
             Fix For: 1.12.0, 1.11.3


According to the JavaDocs of {{WatermarkStrategy.withTimestampAssigner}} one can define a watermark strategy with the following code:

{code}
WatermarkStrategy<CustomObject> wmStrategy = WatermarkStrategy
	 .forMonotonousTimestamps()
	 .withTimestampAssigner((event, timestamp) -> event.getTimestamp());
{code}

However because of https://e.printstacktrace.blog/java-type-inference-generic-methods-chain-call/, this won't compile.



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