Github user tushargosavi commented on a diff in the pull request:
https://github.com/apache/apex-core/pull/361#discussion_r74229007
--- Diff: api/src/main/java/com/datatorrent/api/StatsListener.java ---
@@ -115,6 +115,28 @@
List<OperatorResponse> getOperatorResponse();
}
+ /**
+ * An interface to the DAG. Stats listener can get information about
+ * operator or other elements in the DAG through this interface.
currerntly
+ * we only provide method to extract the operator name based on the
physical
+ * id of the operator. In future more methods can be added.
+ *
+ */
--- End diff --
exposing all information may expose internal implementation of the DAG. we
can only have dependency on apex-api. Can you suggest which information can be
provided to stat listener without adding dependency on the apex-engine. I can
think of following
- name
- number of partitions for self.
- aggregated stats at logical operator level.
This list could be expanded in future.
This jira puts the required infrastructure without breaking backward
compatibility.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
