SteNicholas commented on code in PR #20029:
URL: https://github.com/apache/flink/pull/20029#discussion_r905908590
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flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/NFA.java:
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@@ -91,6 +92,13 @@
*/
private final Map<String, State<T>> states;
+ /**
+ * The lengths of a windowed pattern, as specified using the {@link
+ * org.apache.flink.cep.pattern.Pattern#within(Time, Pattern.WithinType)}
Pattern.within(Time,
+ * WithinType)} method with {@code WithinType.PREVIOUS_AND_CURRENT}.
+ */
+ private final Map<String, Long> windowTimes;
Review Comment:
@dianfu, IMO, the windowTime between previous and current event doesn't need
to move to the `State`. Because this windowTime is the timeout condition of the
NFA state, which state doesn't need to include the condition.
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