Minimize database reads

[Arjun Shastry]

Hi

I am writing a web service(JAX-WS). One of the operation(submitData) requires web service to find how many more requests it should allow before it allows the current request. If there are already queued requests, then current request is rejected.

Client API may call submitData multiple times pro grammatically . In that case, first few requests might get accepted and some many not. For every request, we need database read(reading some count from mysql table).

Is there any way(cache etc) to minimize the database reads ?

[Brian Tkatch]

I don't know the answer. Is it possible you can keep track of calls in your code by incrementing a number and decrementing them on return?

[Stephan van Hulst]

This sounds questionable. Why do you want to limit the requests by your web application? This is the job of the web application server.

[Arjun Shastry]

Thanks.
There are multiple web servers(say 10) on the front.(Its Axis web application on JBoss). So if one customer submits 50 requests, they will be load balanced. Keeping a track from web server level might be tough. After web server level , there is one Control server which will receive all these requests. This server will access DB to check currently how many requests are queued and hence how many more can be allowed. So DB read will be proportional to number of requests submitted.

[Stephan van Hulst]

You will probably want to filter this as soon as possible. Why can't the load balancing server handle this?