boyuanzz commented on a change in pull request #12016:
URL: https://github.com/apache/beam/pull/12016#discussion_r454077833
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/RestrictionTracker.java
##########
@@ -99,6 +99,24 @@
*/
public abstract void checkDone() throws IllegalStateException;
+ public enum RestrictionBoundness {
+ IS_BOUNDED,
+ IS_UNBOUNDED
+ }
+
+ /**
+ * Return the boundedness of current tracking restriction. If the current
restriction produces
+ * finite output, it should return {@link RestrictionBoundness#IS_BOUNDED}.
Otherwise, it should
+ * return {@link RestrictionBoundness#IS_UNBOUNDED}.
+ *
+ * <p>The API is called by the system when the pipeline starts to drain and
there is no
+ * implementation of {@link DoFn.TruncateRestriction}. Based on the
boundness of the restriction,
+ * the system will give the default behavior of truncating restrictions.
+ *
+ * <p>The API is required to be implemented.
+ */
Review comment:
Created JIRA https://issues.apache.org/jira/browse/BEAM-10480 for
tracking this cleanup.
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