[Subtask] Add event listener support for Tag system.

[jerryshao]

This issue tracks the work of achieving event listener for tag system.

[jerryshao]

@TEOTEO520 here is the issue, please leave a message here so I can assign this to you.

[charanbhatia]

@jerryshao can you assign this issue to me?

[jerryshao]

@charanbhatia I think @TEOTEO520 also want to work on this, if you want to take a shot you can sync with @TEOTEO520 about this.

[TEOTEO520]

@TEOTEO520 here is the issue, please leave a message here so I can assign this to you. I apologize for not responding to you in a timely manner. I am currently working on the implementation of this issue. If

@charanbhatia you could leave this issue to me, I would be very grateful.

[amazingLychee]

Hi @jerryshao, can I take this?

[xunliu]

hi @amazingLychee Thank you for your interest in this issue. I already assign it to you. :-)

[jerryshao]

Hi @jerryshao, can I take this?

Please go ahead. Thanks @amazingLychee .

[amazingLychee]

Hi @jerryshao @xunliu , I have been busy with final exams recently. If it blocks another task, could you assign me off from this task? Thank you!

[jerryshao]

Sure, no problem.

[TungYuChiang]

@jerryshao I’m interested in working on this issue. Could I take it?

[jerryshao]

Yes, you can go ahead, this task is bit large, it would be better if you can read out how event listener is achieved in Gravitino and draft a design doc about how to do it for Tag system.

[TungYuChiang]

@jerryshao I have drafted the design document for the Tag system, and you can find it at the link below design document If there are any misunderstandings or areas for improvement, please let me know.