Any ideas to cache records in memory or something?

Question

HI,
I have a question about keeping records off the database.
i have a bean that opens up the recordset puts it in a vector and returns the vector to the jsp from whence it was called.
But the problem is that these database queries are truly unnecessary. If i could update the recordset say once a month i would be set.
my QUESTION is does anyone know any strategy for storing the recordset in memory some how ?
each user might need a different recordset.
however i could possibly reuse a recordset of about 500 records from Oracle for 1 user but if the user chooses to look at another topic then i would possibly have to refersh that recordset with different info based on a different primary key.

Answer 1

Thanks.
QUESTION 1:
I have been using a Vector to store recordsets.
The bean method would call a sql statement in another class and loop through the resultset - insert everything as a String into the Vector and return the vector to the JSP page. is that how you would do it?
Are Vectors serializable? is it possible to implement your solution by caching the Vectors in an HttpSession? or is this restricted to an arraylist
QUESTION 2:
You say I should store the arraylist into the HttpSession -
I just want to double check how you implement this.
Do you mean that I should have a bean that implements serialiable and instantiate the bean in session scope ?
with <jsp:useBean id="j" etc etc scope="session" > and everytime the person goes to a page with this instantiation it will just pick it up out of session instead of requerying the db.
to change the primary key of query in the array list I would pass a different id to the bean and would it automatically know to requery and populate the arraylist?
Thanks
Stephen