RE: JDBC Data Source - Data Access Beans

["David Morris" <dmorris@xxxxxxxxxxxxx>]

Gilles and others, 

You mention the Data Access Beans, which are probably not an option in our 
application.  
What are some of the alternatives?  I have built a set of beans that support 
relatively 
stable files for our system.  I doubt I did this optimally.  In our case, I 
used a keys to data 
values.  I also included an expired flag.  The first person to hit a file will 
load the data.  
If a table changes, the expired flag is set. This data does not change very 
often at all 
(most files have been in production with no data changes for over 5 years).  I 
did have 
to make an assumption that is OK for now that as long as you are authorized to 
the 
application you are authorized to this master file type data. 

I can see some drawbacks to my design particularly with larger files.  The 
largest 
in this case is only about 3000 records.  So far that has not been a problem, 
but 
it would be nice to have a more selective cache. Another problem would be if 
it becomes necessary to lock down individual files.  Most of these beans 
support 
custom tags used in the user interface that uses Struts to control the view.

David Morris

>>> Gilles.DUCRET@lloydsbank.ch 07/02/01 01:27AM >>>
...I suggest you to use the Data Access Beans provided by IBM. They have
caching features allowing you to read the result set even if
it is closed (In fact you don't read the resultset, but a cache object
containing the result).
 
Gilles

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