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Posted to dev@avro.apache.org by "Saurabh (JIRA)" <ji...@apache.org> on 2018/12/07 21:19:00 UTC

[jira] [Updated] (AVRO-2282) Control default FLUSH_PASSED_TO_STREAM behavior of JsonEncoder

     [ https://issues.apache.org/jira/browse/AVRO-2282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Saurabh updated AVRO-2282:
--------------------------
    Attachment: avrojsonencoder1.patch
        Status: Patch Available  (was: Open)

> Control default FLUSH_PASSED_TO_STREAM behavior of JsonEncoder
> --------------------------------------------------------------
>
>                 Key: AVRO-2282
>                 URL: https://issues.apache.org/jira/browse/AVRO-2282
>             Project: Apache Avro
>          Issue Type: Improvement
>          Components: java
>            Reporter: Saurabh
>            Priority: Major
>             Fix For: 1.7.4
>
>         Attachments: avrojsonencoder1.patch, avrojsonencoder1.patch
>
>
> The FLUSH_PASSED_TO_STREAM feature of JSONGenerator controls if flush calls to JsonEncoder are passed to the underlying stream. The default value for this is true causing the underlying stream to be flushed every time encoder.flush is called. Currently, JsonEncoder doesn't provide a way to change this behaviour. In many scenarios, a flush call is made to the encoder with the intention of flushing the buffer to the underlying stream, and not the stream itself, which has a detrimental impact on performance. The patch provided creates a way to specify the default behaviour of underlying JSONGenerator during JsonEncoder's initialization itself. This will be extremely helpful in scenarios such as Hadoop's MR Evenwriter, allowing the caller to set the desired behaviour for optimal performance. 



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