[
https://issues.apache.org/jira/browse/AVRO-25?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Thiruvalluvan M. G. updated AVRO-25:
------------------------------------
Attachment: AVRO-25.patch
Patch of blocking support
> Blocking for value output (with API change)
> -------------------------------------------
>
> Key: AVRO-25
> URL: https://issues.apache.org/jira/browse/AVRO-25
> Project: Avro
> Issue Type: Improvement
> Components: java
> Reporter: Raymie Stata
> Assignee: Thiruvalluvan M. G.
> Attachments: AVRO-25.patch
>
>
> The Avro specification has provisions for decomposing very large arrays and
> maps into "blocks." These provisions allow for streaming implementations
> that would allow one to, for example, write the contents of a file out as an
> Avro array w/out knowing in advance how many records are in the file.
> The current Java implementation of Avro does support this provision. My
> colleague Thiru will be attaching a patch which implements blocking. It
> turns out that the buffering required to do blocking is non-trivial, so it
> seem beneficial to include a standard implementation of blocking as part of
> the reference Avro implementation.
> This is an early version of the code. We are still working on testing and
> performance tuning. But we wanted early feedback.
> This patch also includes a new set of classes called ValueInput and
> ValueOutput, which are meant to replace ValueReader and ValueWriter. These
> classes have largely the same API as ValueReader/Writer, but they include a
> few more methods to "bracket" items that appear inside of arrays and maps.
> Shortly, we'll be posting a separate patch which implements further
> subclasses of ValueInput/Output that do "validation" of input and output
> against a schema (and also do automatic schema resolution for readers).
> We're implementing these classes separate from ValueInput/Output to allow you
> to kick our tires w/out causing too much disruption to your source trees.
> Let's validate the basic idea behind these patches first, and then determine
> the details of integrating them into the rest of Avro.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
