muSOAing for 6/3/12 – RegionObserver coprocessor

Coprocessors have introduced very powerful capabilities into HBase.   The lifecycle methods of a coprocessor like RegionObserver give you trigger like capability.   For instance you can override the preGet, postGet methods and perform your own logic.

The code thus written can be deployed server wide by including the change in hbase-site.xml or for a specific table in the hbase command shell.

You can also now avail of stored procedure like capability by using coprocessor endpoints.   Plan to explore this next.

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