Decesion to compile JSP?

[Ash Kondhalkar]

Hi,

I have one doubt. Suppose I am running a dynamic web application on my machine. I have modified one of the jsp, and now I am trying to access this jsp from internet browser from application, how does server takes a decesion to compile this jsp???

Cheers
Ashwin

[vidya sagar]

Once you changed the JSP that is currently running,Container automatically knows(thru some mechanism thats is vendor dependent) and at next request it generates a update servlet file,compiles and execute the updated one.

[Ash Kondhalkar]

Thank you for replying. Actually I was eager to know how the server understands that its time to recompile the JSP...

[Ulf Dittmer]

Most likely it looks at the last modified date of the JSP file. If that is later than the date on the class file, then it's time to recompile. Tomcat keeps the generated source and class files in the "work" directory.

[Ash Kondhalkar]

Actually I thought of the same solution. But then thought of one scenario where it will fail. If I back date my machine and then change a JSP and save it, then JSP timestamp will be older than its class file timestamp.... And this JSP will never be compiled.

[Ulf Dittmer]

Well, if you change the date on a machine, other things will stop working, too. CVS, e.g., looks at file timestamps as well. Tomcats JSP implementation does indeed break if you change the clock. But that's hardly a bug, more like a deliberate breakage.

[Bear Bibeault]

You could also blow the machine up with dynamite and it will stop working.

[Ben Souther]

 

Originally posted by Bear Bibeault:
You could also blow the machine up with dynamite and it will stop working.

Is there a workaround for this bug?

[Ben Souther]

[Bear Bibeault]

 

Originally posted by Ben Souther:


Is there a workaround for this bug?

Yes, it involves ablative armor and, optionally, force field technology.