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From "Yves Langisch (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GORA-34) Lazy loading for maps
Date Thu, 07 Apr 2011 06:27:05 GMT
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


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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