Multiple TCP connections from JSP to host application

I have an application that I need to provide web based access to.

The existing application has a Java API that can be used to integrate with it, under the hood it just communicates via ASCII text strings via TCP/IP connections.

I have implemented JSP pages on a Tomcat server that use Beans I have created to call the various methods I require through the API.

My problem is this:

The application will only accept one connection from each TCP host, so using a web server I can only ever have one connection to the application open at any one time. This obviously presents problems when the number of concurrent users increases and performance degrades pretty sharply.

Is there any way to set-up the application (Tomcat / JSP / Bean side) to create multiple connections to the application host machine from the one Tomcat server?
quserAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

jimmackCommented:
Well that's a tricky one to answer.  There's nothing to stop the Tomcat side implementing multiple connections.  You seem to have implied that the problem is more at the other end:

>> The application will only accept one connection from each TCP host

If you can't change that, then you might be able to get around it with some network "jiggery-pokery"*, but I'm not quite sure how.

*According to TimYates, this is "Errr... a technical term" ;-)
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
kennethxuCommented:
solution A, as jimmack said, change the other end and let it accept more connection from one single ip.

solution B, use virtual IP. that means assign multiple ip address to your server. it is OS level thing and platform dependent. then use Socket(InetAddress address, int port, InetAddress localAddr, int localPort)  to make multiple connections.

let us know if you have further enquires.
0
TimYatesCommented:
> *According to TimYates, this is "Errr... a technical term" ;-)

HAHAHA :-)
0
quserAuthor Commented:
An update,

It seems that from talking to the applications producers it will accept multiple connections from a single host through the API (not from their supplied client application though, that is were the confusion came).

However it seems that the application is not multi-threaded and so will block requests when busy.

I suppose I need a solution were I can initiate a request from my Bean / JSP and wait until I recieve a response from the server app?
0
kennethxuCommented:
it is true that you should not make too much simultaneous connections even if the server app allows multiple connections. just like database connections.

you should implement a connection pool strategy, that can limit the number of simultaneous connections and eliminate the expensive cost to establish a network connection with server.

you can have a look at jakarta commons pool package, it will make you life a lot easier when implementing a connection pool:
http://jakarta.apache.org/commons/pool/

let us know.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
JSP

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.