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Posted to dev@avro.apache.org by "Michael Armbrust (JIRA)" <ji...@apache.org> on 2011/08/10 04:59:27 UTC
[jira] [Updated] (AVRO-873) SpecificDatumReader should allow users
to specify the ClassLoader used.
[ https://issues.apache.org/jira/browse/AVRO-873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Armbrust updated AVRO-873:
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Status: Patch Available (was: Open)
Here is a patch the implements the improvement. Comments or suggestions appreciated.
> SpecificDatumReader should allow users to specify the ClassLoader used.
> -----------------------------------------------------------------------
>
> Key: AVRO-873
> URL: https://issues.apache.org/jira/browse/AVRO-873
> Project: Avro
> Issue Type: Improvement
> Components: java
> Reporter: Michael Armbrust
>
> Right now SpecificData resolves classes for SpecificRecords by calling Class.forName(), which uses the ClassLoader used to load the SpecificData class. I believe this makes it impossible to deserialize into SpecificRecords that are loaded using a different ClassLoader.
> One relatively simple way to fix this limitations involves:
> * Adding a constructor to SpecificData that allows the user to specify a ClassLoader.
> * Changing the current protected constructor of SpecificDatumReader that takes a SpecificData to be public instead of protected.
> * Changing SpecificDatumReader to actually use the SpecificData that is passed into the constructor.
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