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From "Aleksey Plekhanov (Jira)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-12441) Refactor SystemViewRowAttributeWalker registration for system views
Date Fri, 13 Dec 2019 07:39:00 GMT
Aleksey Plekhanov created IGNITE-12441:
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             Summary: Refactor SystemViewRowAttributeWalker registration for system views
                 Key: IGNITE-12441
                 URL: https://issues.apache.org/jira/browse/IGNITE-12441
             Project: Ignite
          Issue Type: Task
            Reporter: Aleksey Plekhanov
            Assignee: Aleksey Plekhanov


Currently, to register system view we need at least to actions:
 # Register walker for a system view class
 # Register system view itself for a given class

There is a map maintained to bind the attribute walker and system view class.

Sometimes walker registration code and system view registration code are located in different
parts of Ignite.

But in most cases, there is 1:1 relation between attribute walkers and system views. We don't
need to maintain additional structures and do additional actions to find a walker by system
view class, we can bind walker to system view itself.

Moreover, in the current implementation, there is impossible to use different walkers for
one system view class (for example when we want to create two views with the same system view
class, but with different columns set)

 



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