These last two answers addressed exactly what I was looking for. The framework is handling the instance variables and threading as expected/hoped-for. Thanks all!
--- Hal Deadman <[EMAIL PROTECTED]> wrote: > As long as there are no synchronization issues with your > Action class > then it shouldn't be a bottleneck. I don't even know why an > application > server would create more than one instance of a servlet. The > doGet() > method on a servlet or the process() method on an Action class > can be > called by as many concurrent threads as your application > server wants to > use and it shouldn't be a problem. There is no waiting or > queueing > going on. > > Every thread gets their own copy of the local variables in the > method. > You can have instance variables in the Action class (like a > Business > Delegate or session bean home interface) as long as they are > created > once in the constructor and only contain "thread safe" methods > with no > synchronization issues. > > This is not to say that Struts doesn't have some overhead but > so do > EJBs, databases, networks, etc. You use them because they make > your code > more maintainable and increase productivity. Performance > problems are > almost always going to come from bad code or database mis-use > rather > than a framework like Struts. > > Hal > > > -----Original Message----- > > From: David Cherryhomes [mailto:[EMAIL PROTECTED]] > > Sent: Friday, May 10, 2002 6:15 PM > > To: Struts Developers List > > Subject: RE: Scalability question > > > > > > I'm sorry, maybe I was unclear. I am not challenging the > > usefulness of Struts, I am well aware of the vast amount of > > functionality that the framework encompasses. I am currently > > using Struts as a core part of the MVC approach in my > enterprise > > application. My question is about the scalability of Struts > > Action classes. > > > > It is my understanding that a Servlet engine will create new > > instances/threads of a Servlet as needed (similar to > stateless > > session beans), and hence is very scalable for multiple > > concurrent requests. My understanding is that an Action > class, > > on the other hand, is stored as an instance variable. The > > question is this: if I have a class that performs a massive > > amount of business processes (inclusive of attaching to > multiple > > EJB's), will the multiple concurrent requests end up queued > in a > > wait status until each one is finished processing, or is > there a > > multiple instance/thread approach to Action classes (similar > to > > a Servlet engine with Servlets)? > > > > The enterprise application I'm working on isn't for some > > website, but a truly web-deployed enterprise app which must > > scale to thousands of concurrent users with millions of > records > > in the DB. Thus, performance is a HUGE concern (e.g., a wait > of > > 500 miliseconds is about the max permitted). > > > > Thanks > > > > --- James Mitchell <[EMAIL PROTECTED]> wrote: > > > Yes, you can create your entire web site with only servlet > > > filters, jsp, and > > > a few beans. > > > > > > And at some point you will find out what struts does for > you > > > (the hard way) > > > and why it is superior to all other Java Web Application > > > Development > > > Frameworks. > > > > > > I hope this helps. > > > > > > JM > > > > > > "Its a dog-eat-dog world out there, and I feel like I'm > > > wearing milkbone > > > underwear!" > > > Guess who? > > > > > > > > > > -----Original Message----- > > > > From: David Cherryhomes [mailto:[EMAIL PROTECTED]] > > > > Sent: Friday, May 10, 2002 5:27 PM > > > > To: Struts Developers List > > > > Subject: Scalability question > > > > > > > > > > > > Have there been any solid tests in regards to the > > > scalability of > > > > using the Action Servlet and Action class (as opposed to > > > using a > > > > single Filter servlet which forwards to other Servlets)? > I > > > am > > > > especially concerned since my Action class connects > (thru a > > > > BusinessDelegate) to one or more EJB's that are really > > > > responsible for processing the business logic. > > > > > > > > Any thoughts on this would be greatly appreciated. > > > > > > > > __________________________________________________ > > > > Do You Yahoo!? > > > > Yahoo! Shopping - Mother's Day is May 12th! > > > > http://shopping.yahoo.com > > > > > > > > -- > > > > To unsubscribe, e-mail: > > > > <mailto:[EMAIL PROTECTED]> > > > > For additional commands, e-mail: > > > > <mailto:[EMAIL PROTECTED]> > > > > > > > > > > > > > > > > > -- > > > To unsubscribe, e-mail: > > > <mailto:[EMAIL PROTECTED]> > > > For additional commands, e-mail: > > > <mailto:[EMAIL PROTECTED]> > > > > > > > > > __________________________________________________ > > Do You Yahoo!? > > Yahoo! Shopping - Mother's Day is May 12th! > > http://shopping.yahoo.com > > > > -- > > To unsubscribe, e-mail: > > <mailto:[EMAIL PROTECTED]> > > For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > > ATTACHMENT part 2 application/x-pkcs7-signature name=smime.p7s __________________________________________________ Do You Yahoo!? Yahoo! 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