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From "Sean Busbey (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-3594) Consider message replacement for Writable classes internally
Date Wed, 25 Feb 2015 03:08:05 GMT


Sean Busbey commented on ACCUMULO-3594:

All Avro makes use of a Schema that describes what the data looks like. You can optionally
use this Schema to generate language-specific serialization classes just for said Schema.

Alternatively, Avro has a library they refer to as "generic serialization" that allows you
handle serialization using only the Schema and avro-provided library classes.

The Avro "getting started" guide covers the two, though it starts with the version that does
code generation:

> Consider message replacement for Writable classes internally
> ------------------------------------------------------------
>                 Key: ACCUMULO-3594
>                 URL:
>             Project: Accumulo
>          Issue Type: Sub-task
>            Reporter: Josh Elser
>             Fix For: 1.7.0
> We have a number of writable classes, some of which are non-trivial and serialized in
tables or files:
> * {{org.apache.accumulo.core.tabletserver.log.LogEntry}}
> * {{org.apache.accumulo.core.metadata.schema.DataFileValue}}
> * {{org.apache.accumulo.server.master.state.TServerInstance}}
> Consider converting this (and possibly others) to better message classes to easily add
more functionality in the future.

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