Handle database updates

Hi all

I am using Oracle 11g as the backend daatabse. I wanted to cache an entire table  in gemfire .There is a read only application which will in turn read from the cache and will be completely sheilded from the databse.

Now the real issue is there are legacy applications which change i.e update the tables in the databse.These application at present cannot interact with cache.Now the databse will have an updated table while the preloaded table in gemfire have stale records.

Can anyone suggest how gemfire can handle such db updates. The whole focus is to next get only those updated delta records an d updayting our gemfire cache intead of loading the entire table again.

Any help will be highly appreciated.

Thanks