John Cherouvim wrote: > Hello > > I'm building a mid scale web application for use within an intranet. I'm > using a custom web framework to handle flow, user input, validations, > persistence with hibernate and views with JSP and JSP 2.0 tag files. I > use tomcat 5.0.28 and in particular this feature it has where you can > write you own tag files in the WEB-INF/tags folder, and tomcat will > compile them and make them available in the JSPs. > > I like this feature because it provides me encapsulation. I can call any > tag I like with parameters and in addition I also use JSTL and EL which > allows me to do anything I would ever want on the presentation side of > the application. > > I've used jsp tag files before, in a much smaller application where I > had something like 10 tags. > Right now I am 50% done with this application and I already have 120 tag > files to render pojos, fields, various html controls etc. Most tags call > other tags in order to generate the whole page. > The first (small) problem is that every time I change something on a > tag, particularly in fine grained tags (which are heavily being used > from other tags) then tomcat has to recompile everything. It takes > around 1.5 minutes to do that on my workstation. > > The second (big) problem, is when I try to deploy on the client's web > server (intel xeon with 4 cpus with tomcat 5.0.28). I deploy and tomcat > starts up in something like 9 seconds. Then I access the application for > the first time, using a browser, and it takes more than an hour to build > the work\Catalina\localhost\MY-APPLICATION\org\apache\jsp folder. > Looking at the generated sources of those tag files it seems to me that > its taking so much because tomcat has to calculate all the dependencies > between tags. As soon as everything has compiled, the application runs > smothly as expected. There are 118 tag files, and the > work\Catalina\localhost\MY-APPLICATION\org\apache\jsp folder ends up > with 238 files (one for .java and one for .class) and takes up 2.7mb. I > don't know why such a fast machine needs so much time to generate 1.47mb > of source code, and compile it. > > This situation is really bad for me and I'd like to know what can I do > to improve the situation. > 1. Would tomcat 5.5.17 improve anything on this issue? > 2. Would precompiling the JSPs and tags improve anything? > 3. Can I upload my work\Catalina\localhost\MY-APPLICATION folder to the > client's server and force that tomcat not to re-compile? I tried it and > it did start compiling the jsps/tags again. > 4. Would changing some tags from tag files to proper Java > javax.servlet.jsp.tagext.Tag classes improve anything? > 5. If I package my tag files into a jar, would then tomcat had to do the > work thing? > 6. Should I change to another templating engine, such as Velocity? > > thanks, > Ioannis > 1-5 all sound like good ideas to try to me. 6 seems like a last resort kind of choice.
i can't really provide you with a satisfying answer here since I don't know tomcat/jasper internals that well myself. and so far i never had to deal with that many custom tags. however i would like to suggest you do some java profiling. that should reveal which method(s) use up all the cpu time and may provide a hint to the source of the problem. Edmund --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
