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From "Appy (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17605) Refactor procedure framework code
Date Tue, 07 Feb 2017 02:20:41 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Appy updated HBASE-17605:
-------------------------
    Description: 
    - Moved locks out of MasterProcedureScheduler#Queue. One Queue object is used for each
namespace/table, which aren't more than 100. So we don't complexity arising from all functionalities
being in one place. MasterProcedureLocking#Lock is the new locking class.
    - Removed NamespaceQueue because it wasn't being used as Queue (add,peek,poll,etc functions
threw UnsupportedOperationException). It's was only used for locks on namespaces. Now that
locks have been moved out of Queue class, it's not needed anymore.
    - Remoed RegionEvent which was there only for locking on regions. Tables/namespaces used
locking from Queue class and regions couldn't (there are no separate proc queue at region
level), hence the redundance. Now that locking is separate, we can use the same for regions
too.
    - Removed QueueInterface class. No declarations, except one implementaion, which makes
the point of having an interface moot.
    - Removed QueueImpl, which was the only concrete implementation of abstract Queue class.
Moved functions to Queue class itself to avoid unnecessary level in inheritance hierarchy.
    - Encapsulated table priority related stuff in a single class.
    - Removed some unused functions.

  was:(details to come)


> Refactor procedure framework code
> ---------------------------------
>
>                 Key: HBASE-17605
>                 URL: https://issues.apache.org/jira/browse/HBASE-17605
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Appy
>            Assignee: Appy
>         Attachments: HBASE-17605.master.001.patch
>
>
>     - Moved locks out of MasterProcedureScheduler#Queue. One Queue object is used for
each namespace/table, which aren't more than 100. So we don't complexity arising from all
functionalities being in one place. MasterProcedureLocking#Lock is the new locking class.
>     - Removed NamespaceQueue because it wasn't being used as Queue (add,peek,poll,etc
functions threw UnsupportedOperationException). It's was only used for locks on namespaces.
Now that locks have been moved out of Queue class, it's not needed anymore.
>     - Remoed RegionEvent which was there only for locking on regions. Tables/namespaces
used locking from Queue class and regions couldn't (there are no separate proc queue at region
level), hence the redundance. Now that locking is separate, we can use the same for regions
too.
>     - Removed QueueInterface class. No declarations, except one implementaion, which
makes the point of having an interface moot.
>     - Removed QueueImpl, which was the only concrete implementation of abstract Queue
class. Moved functions to Queue class itself to avoid unnecessary level in inheritance hierarchy.
>     - Encapsulated table priority related stuff in a single class.
>     - Removed some unused functions.



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