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Subject [GitHub] [accumulo] milleruntime commented on pull request #2256: Create objects for compaction files switch case
Date Wed, 01 Sep 2021 17:59:05 GMT

milleruntime commented on pull request #2256:

   > > Any ideas of how this could be more Object oriented?
   > OO can have many goals. One goal w/ interfaces and class impls is that many different
impls can be added over time. In this case there is a fixed universe of impls that will not
be expanding, so in my mind adding the indirection has little or no benefit in terms of making
the code easier to maintain and understand.
   > Maybe making some of the changes like @DomGarguilo suggested to the current switch
stmts will make them shorter and easier to follow. Seems like some comments about the importance
of taking a snapshot may also be useful.
   It seems like there is a concrete state in this code (a User compaction with specific settings
selected X files) that could be encapsulated in an object. Then that object could be passed
around. There is a lot of checking the CompactionKind and different status objects, keeping
some type of state. I think what you did with the FileManager is a step in the right direction
but there could be more encapsulation that would make the code easier to understand and maintain.
   A large if or switch statement is almost always a clear indicator of code that needs an
OO design. I just don't know the code like you do to know the specifics of that design.

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