Re: MYSQL, Orion, EJB and transactions ??
Title: MYSQL, Orion, EJB and transactions ?? You could always use Interbase which now is opensource.. http://www.interbase.com - Original Message - From: Laufer, Michael To: Orion-Interest Sent: Friday, October 27, 2000 10:41 AM Subject: MYSQL, Orion, EJB and transactions ?? Hi there, I know that the question has been discussed here before, but I'm still a little confused about using MYSQL together with Orion. I've just downloaded mysql (version 3.23.22 beta) and the manual announces that mysql is now supporting transactions. If I understood it correctly, that would mean, that it should be possible to use mysql with entity beans. Am I right ?? What's confusing to me is the fact, that I only find news in mailing-list, that mysql is not supporting transactions. So I don't really now, if I can use mysql for entity beans. If not, which database would you suggest ?? It should work on NT and not be the most expensive one as I use it 'only' for writing my Master's Thesis. Thanks in advance, Michel
Re: EJB preformance Was: Does Orion eliminate RMI?
I've done some very simple performance tests invoking methods of a simple session EJB on both ejboss 1.0 and orionserver 0.9 (a time ago;). The result was that orionserver was about 10 times - 50 times faster than ejboss. Both in VM calls and out of vm calls (both on the same machine). Can anyone confirm? The ejboss container uses the new dynamic proxy feature in jdk1.3 (java.lang.reflect.Proxy etc) which I don't belive can be as fast as precompiled stubs because of the code overhead in the invocationhandler. The design and implementation with dynamic proxy is tough much simpler to implement. This might be the reason of the performance difference between ejboss and orion. (Orion team: Deny if I'm wrong!) Can anyone please continue this discussion about EJB-performance and orionserver since it is a quite important issue? Any other performance tests done? Please inform this list :) /Jonas -Ursprungligt meddelande- Fran: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]For Eric Richardson Skickat: den 30 maj 2000 16:25 Till: Orion-Interest Amne: Re: Does Orion eliminate RMI? Was: How are database JOINS achievedwith EJBs? Steven Punte wrote: Al Fogleson wrote: then you start adding all the RMI calls over the network and that adds some load too Well, EJBs will not always be called remotely to start with. A very common scenario is that you write Servlets/JSPs that communicate with EJBs. Usually you will run your Web components and EJBs on the same servr and no RMI calls will be made. Of course though, if you need the remote access it will be used. But that is an overhead you need no matter what technology. Orion's RMI-transport protocol is very optimized. I agree with Karl that RMI, even on the same machine, is a significant overhead. Think of CPU consumption to serialized and de-serialize member function arguments and return value. When ones' client and EJB container are both on the same machine and in the same process, CAN Orion bypass the RMI protocol here and achieve near optimum performance? I believe this is what JBoss does. See at ejboss.org Eric It would be like having your cake and eating it too, to have both the Enterprise architecture and near optimum performance in this single server scenario. :-) STeve
SV: java.lang.NullPointerException
Hmm... I've run in to a similar problem when I was using Orion 0.9.1b without a web-site setup and only as an EJB container, but in my case I got several NullPointerException's one thrown every second (about). Perhaps it has something to do with a timed check of changes in the servlet classes and with no website available a NullPointer is given instead of the first site? /Jonas -Ursprungligt meddelande- Fran: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]For Olav Rabe Skickat: den 25 februari 2000 08:48 Till: Orion-Interest Amne: java.lang.NullPointerException Hi, When I start a client, I get the following exception: D:\ntapps\orionjava -jar orion.jar Auto-unpacking f:\projects\dohmen\prototype\4soft-core\dev\app\FooBarApp.ear... done Auto-deploying FooBarApp... Auto-deploying FooBarEntities.jar... done. Orion/0.9.1b initialized java.lang.NullPointerException at au.run(JAX) at c.run(JAX) Any ideas? In order to make the client stubs (...WrapperXX.class) available to the client I simply included the ejb-jar file (FooBarEntities.jar) which orion generated at deployment time in the client's classpath. Hope that's like it's meant to be. The application-client.xml is placed in both, the ejb-jar file (FooBarEntities.jar) and the client's classpath root. Is that ok? Thanks, Olav
JSP-buffering implementation in Orion.
Hi, I have been trying to use the "response.sendRedirect()" feature of the Servlet API from a JSP page. It works very good when I'm doing it before any jsp:include (when a jsp:include is proccessed the buffer is flushed and the headers cannot be changed). My real question is: Doesn't Orionserver support autoFlush=false in the page directive and flush="false" in the jsp:include directive? /Jonas
Virtual host err, jsp:param err!
Hi, I have also discovered the earlier mentioned error when trying to user the virtual-hosts feature in web-site.xml.. Orion server throws a nullpointerexception durning startup when any virtual-hosts atttribute is set to some name.. It seems like jsp:param doesn't really work in the way the JSP spec 1.1 want it to.. Whenever you use a jsp:param in a jsp:include or jsp:forward all other request parameters are lost.. Only the one mentioned in the param should be overridden! /Jonas
Bean managed Entity-EJB error!
Does anyone know why i get the following error when trying to use a bean managed entity bean? Auto-deploying file:/D:/www/orion/ejb/Comunity/... EntityBeanWrapper0.java:90: Undefined variable or class name: set set.close(); ^ EntityBeanWrapper0.java:91: Undefined variable or class name: statement statement.close(); ^ 2 errors Error compiling file:/D:/www/orion/ejb/Comunity/: IO/Compilation error I think some container managed code is accidentially generated for the wrapper classes even thoug the entity bean is container managed. Any qlues to wath is going on?
