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From "Bill Havanki (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-2041) refactor Tablet
Date Tue, 04 Feb 2014 15:40:10 GMT


Bill Havanki commented on ACCUMULO-2041:

I'd like to help out on this if I may. ACCUMULO-1948 has given me the chance to delve into
{{Tablet}} code.

> refactor Tablet
> ---------------
>                 Key: ACCUMULO-2041
>                 URL:
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>             Fix For: 1.7.0
> Tablet has some very delicate state stored in several variables.  Translate this into
some sort of sane state machine, with appropriate, clean log messages when the state transitions.
 I'm specifically thinking of {{closing}}, {{closed}}, {{closeComplete}} and {{closeCompleting}}.
 That's 16 possible states, but I'm thinking that only a few make any sense.  May want to
look at the {{...InProgress}} and {{..WaitingToStart}} booleans, too.  Some of the embedded
classes could be moved out to their own files, just to reduce the size of the class.  There
are 17 uses of the keyword {{class}} in this one file. The constructor nesting is pretty crazy.
 The constructor is doing too much.  It should not be doing recovery, for example.  It should
not be passing "this" to anything.  Small things, like {{extent}}, {{fs}}, {{conf}} should
be final.  Anything that would facilitate unit testing would be welcome.

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