[jira] [Updated] (KAFKA-2041) Add ability to specify a KeyClass for KafkaLog4jAppender

["Benoy Antony (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-2041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benoy Antony updated KAFKA-2041:
--------------------------------
    Attachment: kafka-2041-001.patch

In the attached patch, a _Keyer_ trait is defined. This trait has a function which when given a value , returns the key.

The _KafkaLog4jAppender_ is modified to accept a log4j configuration for a KeyClass. which will be an implementation of _Keyer_.  The _Keyer_ implementation is instantiated and will be used while appending a message.


> Add ability to specify a KeyClass for KafkaLog4jAppender
> --------------------------------------------------------
>
>                 Key: KAFKA-2041
>                 URL: https://issues.apache.org/jira/browse/KAFKA-2041
>             Project: Kafka
>          Issue Type: Improvement
>          Components: producer 
>            Reporter: Benoy Antony
>            Assignee: Jun Rao
>         Attachments: kafka-2041-001.patch
>
>
> KafkaLog4jAppender is the Log4j Appender to publish messages to Kafka. 
> Since there is no key or explicit partition number, the messages are sent to random partitions. 
> In some cases, it is possible to derive a key from the message itself. 
> So it may be beneficial to enable KafkaLog4jAppender to accept KeyClass which will provide a key for a given message.



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