Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/2096
Thanks @tinkoff-dwh for the contribution.
I've seen #2078.
If `precode` is going to be added to all interpreter, how about create some
facility that runs code when initialize interpreter and then make feature based
on it?
How about extend
[Interpreter.Hook()](https://github.com/apache/zeppelin/blob/branch-0.7/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/Interpreter.java#L208)
which currently has
[PRE_EXEC](https://github.com/apache/zeppelin/blob/branch-0.7/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/InterpreterHookRegistry.java#L143)
and
[POST_EXEC](https://github.com/apache/zeppelin/blob/branch-0.7/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/InterpreterHookRegistry.java#L146)
as event type that make code run before and after the interpret() call
respectively.
I think we can add event type such as `AFTER_OPEN`, `BEFORE_CLOSE`. Then
with minimum modification of each interpreter, we can have the feature.
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