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From "Chris A. Mattmann (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (GORA-34) Lazy loading for maps
Date Mon, 12 Sep 2011 12:53:10 GMT

     [ https://issues.apache.org/jira/browse/GORA-34?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris A. Mattmann updated GORA-34:
----------------------------------

    Fix Version/s:     (was: 0.2-incubating)
                   0.3-incubating

- push to 0.3

> Lazy loading for maps
> ---------------------
>
>                 Key: GORA-34
>                 URL: https://issues.apache.org/jira/browse/GORA-34
>             Project: Gora
>          Issue Type: Improvement
>          Components: storage-hbase
>            Reporter: Yves Langisch
>             Fix For: 0.3-incubating
>
>
> I mainly use a big map for each row in my hbase project. So my avro schema looks as follows:
> {
>     "type": "record",
>     "name": "Request",
>     "namespace": "ch.test.generated",
>     "fields" : [
>         {
>             "name": "data",
>             "type": {
>                 "type": "map",
>                 "values": "long"
>             }
>         }
>     ]
> }
> As far as I could see the whole map is read from hbase whenever I get a row. Since I'm
adding many map entries over time I would like to see some kind of lazy loading when accessing
the map. A good place to specify this behavior would be the mapping file:
> <gora-orm>
>     <class name="ch.test.generated.Request" keyClass="java.lang.Long" table="RequestLog">
>         <field name="data" family="dimension" lazy="true"/>
>     </class>
> </gora-orm>

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