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From: "Aditya Kishore (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Updated] (HBASE-7115) [shell] Provide a way to register
 custom filters with the Filter Language Parser
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     [ https://issues.apache.org/jira/browse/HBASE-7115?page=3Dcom.atlassia=
n.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aditya Kishore updated HBASE-7115:
----------------------------------

    Status: Patch Available  (was: Open)

The test failure is unrelated and seems to be related to what is fixed in H=
BASE-8469.

The test ran fine on my machine with updated code. Resubmitting the patch.
               =20
> [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: 0.95.2
>
>         Attachments: HBASE-7115_trunk.patch, HBASE-7115_trunk.patch
>
>
> HBASE-5428 added this capability to thrift interface but the configuratio=
n 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 configuratio=
n 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 fil=
ters while invoking the HBase shell.
> Example usage: Let's say I have written a couple of custom filters with c=
lass 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>}}
> {{=C2=A0=C2=A0<name>hbase.user.filters</name>}}
> {{=C2=A0=C2=A0<value>}}*{{SuperDuperFilter}}*{{:org.apache.hadoop.hbase.f=
ilter.custom.SuperDuperFilter,}}*{{SilverBulletFilter}}*{{:org.apache.hadoo=
p.hbase.filter.custom.SilverBulletFilter</value>}}
> {{</property>}}{panel}
> Once this is configured, I can launch HBase shell and use these filters i=
n my {{get}} or {{scan}} just the way I would use a built-in filter.
> {code}
> hbase(main):001:0> scan 't', {FILTER =3D> "SuperDuperFilter(true) AND Sil=
verBulletFilter(42)"}
> ROW                                                          COLUMN+CELL
>  status                                                      column=3Dcf:=
a, timestamp=3D304385520000, value=3Dworld_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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