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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7115) [shell] Provide a way to register custom filters with the Filter Language Parser
Date Mon, 16 Dec 2013 20:25:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13849687#comment-13849687
] 

Hadoop QA commented on HBASE-7115:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12581929/HBASE-7115_trunk_v2.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/8183//console

This message is automatically generated.

> [shell] Provide a way to register custom filters with the Filter Language Parser
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-7115
>                 URL: https://issues.apache.org/jira/browse/HBASE-7115
>             Project: HBase
>          Issue Type: Improvement
>          Components: Filters, shell
>    Affects Versions: 0.95.2
>            Reporter: Aditya Kishore
>            Assignee: Aditya Kishore
>             Fix For: 0.99.0
>
>         Attachments: HBASE-7115_trunk.patch, HBASE-7115_trunk.patch, HBASE-7115_trunk_v2.patch
>
>
> HBASE-5428 added this capability to thrift interface but the configuration parameter
name is "thrift" specific.
> This patch introduces a more generic parameter "hbase.user.filters" using which the user
defined custom filters can be specified in the configuration and loaded in any client that
needs to use the filter language parser.
> The patch then uses this new parameter to register any user specified filters while invoking
the HBase shell.
> Example usage: Let's say I have written a couple of custom filters with class names *{{org.apache.hadoop.hbase.filter.custom.SuperDuperFilter}}*
and *{{org.apache.hadoop.hbase.filter.custom.SilverBulletFilter}}* and I want to use them
from HBase shell using the filter language.
> To do that, I would add the following configuration to {{hbase-site.xml}}
> {panel}{{<property>}}
> {{  <name>hbase.user.filters</name>}}
> {{  <value>}}*{{SuperDuperFilter}}*{{:org.apache.hadoop.hbase.filter.custom.SuperDuperFilter,}}*{{SilverBulletFilter}}*{{:org.apache.hadoop.hbase.filter.custom.SilverBulletFilter</value>}}
> {{</property>}}{panel}
> Once this is configured, I can launch HBase shell and use these filters in my {{get}}
or {{scan}} just the way I would use a built-in filter.
> {code}
> hbase(main):001:0> scan 't', {FILTER => "SuperDuperFilter(true) AND SilverBulletFilter(42)"}
> ROW                                                          COLUMN+CELL
>  status                                                      column=cf:a, timestamp=304385520000,
value=world_peace
> 1 row(s) in 0.0000 seconds
> {code}
> To use this feature in any client, the client needs to make the following function call
as part of its initialization.
> {code}
> ParseFilter.registerUserFilters(configuration);
> {code}



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