Thank you for your reply. The following in the current master looks like not iterable? because the parameter is IN rather than Iterable<IN> So I still have problem to iterate,,,
@Public public interface AllWindowFunction<IN, OUT, W extends Window> extends Function, Serializable { /** * Evaluates the window and outputs none or several elements. * * @param window The window that is being evaluated. * @param values The elements in the window being evaluated. * @param out A collector for emitting elements. * * @throws Exception The function may throw exceptions to fail the program and trigger recovery. */ void apply(W window, IN values, Collector<OUT> out) throws Exception; } https://github.com/apache/flink/blob/master/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/windowing/AllWindowFunction.java Best, Hung -- View this message in context: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/The-way-to-itearte-instances-in-AllWindowFunction-in-current-Master-branch-tp5137p5145.html Sent from the Apache Flink User Mailing List archive. mailing list archive at Nabble.com.