JNDI Properties for Orion and EJB?
Hi there,
I read in my EJB book that CTM's require vendor specific JDNI properties. I
thought EJB was platform/vendor independent? What are these JNDI properties
for? More importantly..when/why are they used? I see in the example EJB's
with Orion that they all have a jndi.properties file, yet I am not quite
sure how to understand them.
I can say this..I tried getting one EJB from another EJB and I kept getting
RemoteException (or maybe it was NamingException). I may have had the
ejb-jar.xml file wrong..but I don't think so. I checked it several times and
did it exactly as the examples do, so I can't see how come in my one EJB
when I did a context.lookup("java:comp/env/ejb/EJBName") it kept giving me
NamingException. Is it because in an EJB that uses another EJB you must use
the JNDI properties for the context or something?
Anyways..I need to get Entity beans working using JDBC 2.0 (DataSource) so
that I can easily plug in any database I want (if thats even possible).
Thanks.
RE: EJB Basics
Hmm..something I think I can answer..at least to some degree. WEB-INF is a dir usually below each Web Apps WWW dir. WEB-INF is where you would place your compiled classes (WEB-INF/classes) and any 3rd party libraries you would use (WEB-INF/lib). You also have a Servlet 2.2 standard web-app descriptor, called web.xml. This is where you map servlets, set up welcome files, and so on. The .WAR file type is really nothing more than a www dir jarred up (.jar) but with a .war extension. It includes the www folder, and the WEB-INF folder below it, with the compiled classes of the servlets/javabeans/core classes, and 3rd party libraries. You can deploy a single .war file into any J2EE app server that properly implements the spec. Actually, it can be deployed into any Servlet 2.2 container. ServletExec and Resin are two engines that are not J2EE app servers, but do manage Servlet 2.2/JSP 1.1. META-INF is, as far as I know, where a J2EE standard application.xml descriptor goes, and is part of the .EAR file format, which can include many web-apps (many www with WEB-INF dirs below each), as well as EJBs. A single EAR is considered an application in itself, probably because you can deploy EJBs into any J2EE app server using an EAR (if that app server supports EARs). I don't know the full gist of EAR but I do know Orion supports it, including hot-swap (at least I think it supports hot-swap) of EAR applications. I am not sure of the full benefit of EAR over WAR, other than that you can contain many WAR files in a single EAR, as well as any number of EJB's. EAR stands for Enterprise Application aRchive, whereas WAR stands for Web Applicat aRchive. Hope that sheds a little light on the topic. -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark A. RichmanSent: Tuesday, November 14, 2000 10:01 AMTo: Orion-InterestSubject: EJB Basics What is the difference between WEB-INF and META-INF? How do these directory structures relate to jar, ear, and war files? Which of these is J2EE, and which is Orion-specific? Maybe I am confusing something with Tomcat... - Mark
Re[2]: 1.4.4 OR Collection classes
Hallo Robert, RK did you file this as a bug report in bugzilla? I didn't find it there. I'll RK file it now (we just ran into it and it's a nasty one to find). if you RK already have please contact me so I can remove it. RK robert Vidur, This looks in same ways similar to the problem that I reported a couple of days ago. That is, Orion 1.3.8 allowed non-serializable objects to be returned to the client if running in the same JVM (which should of course not be allowed). 1.4.3 on the other hand behaves differently - rather than throwing a java.io.NonSerializableException (?) or something like that (which I suppose would be correct behavour although I haven't looked in the spec), it just returns a null and says nothing. Ein weiteres hartes Problem, das hiermit zusammenhaengt, ist, dass ab der 1.4.4 es vorkommen kann, das ein findXY() NULL zurueckliefert, naemlich genau dann, wenn waehrend der Zeit fuer das zusammenstellen der Collection der Remoteobjekte ein anderer Thread eines der Objekte geloescht hat. Dieses Problem ist nachvollziehbar und in der 1.3.8 noch nicht auf- getreten. Da dieses Szenario (ein Objekt wird geloescht waehrend irgendjemand die Liste der Objekte haben will) durchaus kein seltenes ist, sehe ich dies als schweren Bug an. Angenommen es gibt 1000 entity beans, das findAll() liefert eine Collection von 1000 objekten. falls nun nach dem aufruf von findAll (welches ja eine gewisse zeit dauert) eines der 1000 geloescht wird, sollte doch nicht ploetzlich NULL zurueckgeliefert werden? Ich erwarte entweder 1) eine Collection mit 999 gueltigen objekten (falls das loeschen noch rechtzeitig passierte) oder 2) eine Collection mit 1000 objekten, von denen eines "no longer existent" ist. Wie siehst du das? Ich werde dies mit einem kleinen testcase ins bugzilla stellen, und auch eine Mail in die newsgroup schreiben. /Thomas -- | /Thomas Hertz | [y] hybris GmbH | Software Engineering | | [EMAIL PROTECTED] | Schwere-Reiter-Strasse 35 | tel +49 89 306697- 0 | | www.hybris.de | Haus 16, D-80797 Muenchen | fax +49 89 306697-99 | | pgp fingerprint: D070 5D86 BE2D C3AF E2CC D2D8 C29A 7F68 7407 629E |
RE: EJB Performance Question.
At 14:48 14.11.00 , you wrote: Thanks Robert. I think I'll try running some benchmarks this week and post the results. I wonder.. is there a way for and EJB-EJB to be _forced_ to go through RMI? i.e. can I turn this optimization off? I don't think there is a documented way to to this. robert -tim -Original Message- From: Robert Krueger [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 14, 2000 1:36 PM To: Orion-Interest Subject: RE: EJB Performance Question. At 12:06 14.11.00 , you wrote: At 10:03 14.11.00 , you wrote: Every single one of those calls to dir.getXXX() has to go across the network via RMI. This is slow. You are better off using a well, with orion this is intra-vm so its not that bad ... Is there proof that Orion does this? I'm not trying to be a jerk, but I'd like to see some numbers on how long a set/get takes for a client-to-ejb call and an ejb-to-ejb (same vm) call. do a getClass().getName() on your ejbobject. will be the same wrapper class that implements the ejbobject (if you look into the generate code that's temporarily there on deployment). anyway, I've never benchmarked but it is orders of magnitude faster than any rmi stack I've seen. I think there's even an old mail in the archive from karl that confirms this otiomization because it was one of the first things I asked (must at least be 10 months ago now). regards, robert Not even Weblogic optimizes to pass-by-value for intra-vm ejb calls. You have to use TopLink to get that optimization. Funny though, Weblogic provides a tag in their deployment description but it doesn't do anything. -tim (-) Robert Krüger (-) SIGNAL 7 Gesellschaft für Informationstechnologie mbH (-) Brüder-Knauß-Str. 79 - 64285 Darmstadt, (-) Tel: 06151 665401, Fax: 06151 665373 (-) [EMAIL PROTECTED], www.signal7.de (-) Robert Krüger (-) SIGNAL 7 Gesellschaft für Informationstechnologie mbH (-) Brüder-Knauß-Str. 79 - 64285 Darmstadt, (-) Tel: 06151 665401, Fax: 06151 665373 (-) [EMAIL PROTECTED], www.signal7.de
Re: security-constraint
Try security-constraint> web-resource-collection> web-resource-name>programmer/web-resource-name> url-pattern>/index.jsp/url-pattern> url-pattern>/programmer.jsp/url-pattern> url-pattern>/parseRequestP.jsp/url-pattern> /web-resource-collection> auth-constraint> role-name>users/role-name> role-name>projectchefs/role-name> /auth-constraint> /security-constraint> i.e. both roles in one constraint. Truong Di Ly wrote: Hi Experts, I have this problem: Principals of role users can be authenticated, but not principals of role projectchefs. web.xml : - !--1.security-constraint>--> security-constraint> web-resource-collection> web-resource-name>programmer/web-resource-name> url-pattern>/index.jsp/url-pattern> url-pattern>/programmer.jsp/url-pattern> url-pattern>/parseRequestP.jsp/url-pattern> /web-resource-collection> auth-constraint> role-name>users/role-name> /auth-constraint> /security-constraint> !--2.security-constraint>--> security-constraint> web-resource-collection> web-resource-name>projectchef/web-resource-name> url-pattern>/index.jsp/url-pattern> url-pattern>/projectchef.jsp/url-pattern> url-pattern>/parseRequestPC.jsp/url-pattern> /web-resource-collection> auth-constraint> role-name>projectchefs/role-name> /auth-constraint> /security-constraint> !--3.security-constraint>--> security-constraint> web-resource-collection> web-resource-name>admin/web-resource-name> url-pattern>/index.jsp/url-pattern> url-pattern>/admin.jsp/url-pattern> /web-resource-collection> auth-constraint> role-name>administrators/role-name> /auth-constraint> /security-constraint> If I change 1. security-constraint> with 2.security-constraint> then principals of role projectchefs can be authenticated, but not principals of role users. web.xml: !--2.security-constraint>--> security-constraint> web-resource-collection> web-resource-name>projectchef/web-resource-name> url-pattern>/index.jsp/url-pattern> url-pattern>/projectchef.jsp/url-pattern> url-pattern>/parseRequestPC.jsp/url-pattern> /web-resource-collection> auth-constraint> role-name>projectchefs/role-name> /auth-constraint> /security-constraint> !--1.security-constraint>--> security-constraint> web-resource-collection> web-resource-name>programmer/web-resource-name> url-pattern>/index.jsp/url-pattern> url-pattern>/programmer.jsp/url-pattern> url-pattern>/parseRequestP.jsp/url-pattern> /web-resource-collection> auth-constraint> role-name>users/role-name> /auth-constraint> /security-constraint> !--3.security-constraint>--> security-constraint> web-resource-collection> web-resource-name>admin/web-resource-name> url-pattern>/index.jsp/url-pattern> url-pattern>/admin.jsp/url-pattern> /web-resource-collection> auth-constraint> role-name>administrators/role-name> /auth-constraint> /security-constraint> -- David Smith Software Development Manager e-Net Software Ltd [EMAIL PROTECTED]
1.4.4: findXY() returns NULL if one of the enties is removed
Hello. i filed the following bug to bugzilla: --- The following problem occurs in 1.4.4 but not in 1.3.8: 1) one thread calls a findXY() (lets say findAll() ) on a home interface 2) this will take a while. while thread 1 is processing the findAll() another thread calls remove() for one of the remotes that are expected to be returned by findAll(). 3) the findXY() returnes NULL. in summary: everytime one of the underlaying entities are removed(), the finder methods of orion 1.4.4 always returns NULL. i guess this must be a bug. Robert kruger reported in bug #181 that orion1.4.4 does not allow to return a non serializable value to a client in the same VM. I guess the method which creates the collection for findAll() runs into trouble if an underlaying bean no longer exists, and so the whole process of serialization fails, resulting in a NULL returned to the client. if this problem is not yet known, i can attach a test case. --- what do you think? is this a bug? /Thomas -- | /Thomas Hertz | [y] hybris GmbH | Software Engineering | | [EMAIL PROTECTED] | Schwere-Reiter-Strasse 35 | tel +49 89 306697- 0 | | www.hybris.de | Haus 16, D-80797 Muenchen | fax +49 89 306697-99 | | pgp fingerprint: D070 5D86 BE2D C3AF E2CC D2D8 C29A 7F68 7407 629E |
Re: 1.4.4 OR Collection classes
Hi guys, sorry for this mail in german, wrong recipient! It should go to Robert directly. (Hi robert!) for all how are not able to read german, I added a english translation as seperate mail..;) Greetings, /Thomas TH Ein weiteres hartes Problem, das hiermit zusammenhaengt, ist, TH dass ab der 1.4.4 es vorkommen kann, das ein findXY() NULL zurueckliefert, TH naemlich genau dann, wenn waehrend der Zeit fuer das zusammenstellen der TH Collection der Remoteobjekte ein anderer Thread eines der Objekte TH geloescht hat. TH TH [...] and so on and so on german stuff... TH /Thomas -- | /Thomas Hertz | [y] hybris GmbH | Software Engineering | | [EMAIL PROTECTED] | Schwere-Reiter-Strasse 35 | tel +49 89 306697- 0 | | www.hybris.de | Haus 16, D-80797 Muenchen | fax +49 89 306697-99 | | pgp fingerprint: D070 5D86 BE2D C3AF E2CC D2D8 C29A 7F68 7407 629E |
RE: EJB Basics
I am new to Orion but have experience of Java and have used thejar process several times to archive classes. However, has anyone got an example of using jar tocreate a Web Application war file that includes jsp and bean classes. Thanks for any help. -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kevin DuffeySent: 15 November 2000 08:50To: Orion-InterestSubject: RE: EJB Basics Hmm..something I think I can answer..at least to some degree. WEB-INF is a dir usually below each Web Apps WWW dir. WEB-INF is where you would place your compiled classes (WEB-INF/classes) and any 3rd party libraries you would use (WEB-INF/lib). You also have a Servlet 2.2 standard web-app descriptor, called web.xml. This is where you map servlets, set up welcome files, and so on. The .WAR file type is really nothing more than a www dir jarred up (.jar) but with a .war extension. It includes the www folder, and the WEB-INF folder below it, with the compiled classes of the servlets/javabeans/core classes, and 3rd party libraries. You can deploy a single .war file into any J2EE app server that properly implements the spec. Actually, it can be deployed into any Servlet 2.2 container. ServletExec and Resin are two engines that are not J2EE app servers, but do manage Servlet 2.2/JSP 1.1. META-INF is, as far as I know, where a J2EE standard application.xml descriptor goes, and is part of the .EAR file format, which can include many web-apps (many www with WEB-INF dirs below each), as well as EJBs. A single EAR is considered an application in itself, probably because you can deploy EJBs into any J2EE app server using an EAR (if that app server supports EARs). I don't know the full gist of EAR but I do know Orion supports it, including hot-swap (at least I think it supports hot-swap) of EAR applications. I am not sure of the full benefit of EAR over WAR, other than that you can contain many WAR files in a single EAR, as well as any number of EJB's. EAR stands for Enterprise Application aRchive, whereas WAR stands for Web Applicat aRchive. Hope that sheds a little light on the topic. -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark A. RichmanSent: Tuesday, November 14, 2000 10:01 AMTo: Orion-InterestSubject: EJB Basics What is the difference between WEB-INF and META-INF? How do these directory structures relate to jar, ear, and war files? Which of these is J2EE, and which is Orion-specific? Maybe I am confusing something with Tomcat... - Mark MetaPack The Lightwell 12/16 Laystall Street Clerkenwell London EC1R 4PF Tel: 020 7843 6720 Fax: 020 7843 6721 -- This email is confidential and proprietary; all information contained in it must be used only by the addressee in accordance with MetaPack's terms of business and non-disclosure agreement. Disclosure, copying, and distribution to, or use by, anyone other than the intended recipient is strictly prohibited and may be unlawful.
JDK1.3 and deb. linux
Help ! When i try to start orionserver i get this msg: "error in loading shared libraries: libstdc++-libc6.1-1.so.2: cannot open shared object file: No such file or directory" I'm running the newest version of Debian Linux and Sun:s jdk1.3 ''' Jostein Martinsen [EMAIL PROTECTED] PGP keys fingerprint. Ensure my keys validity! E2CF AF07 B50C 7A99 8EFB 23EA 1D0D E462 CE6B 551C ''
Problems with MySQL and DataSourceUserManager
Hi Is anyone using DataSourceUserManager with MySQL database? We have been using it with PostgreSQL without any problems, but when we switched to MySQL, DataSourceUserManager throws an exception DataSourceUserManager.getUser 8.11.2000 14:29 ANALYYTIKKO-web: Error in UserManager java.lang.RuntimeException: SQLException: Can't call commit when autocommit=true at com.evermind.sql.DataSourceUserManager.getUser(JAX) at com.evermind.server.http.EvermindHttpServletRequest.yf(JAX) at com.evermind.server.http.HttpApplication.vk(JAX) at com.evermind.server.http.HttpApplication.uh(JAX) at com.evermind.server.http.ed.sp(JAX) at com.evermind.server.http.ed.so(JAX) at com.evermind.util.f.run(JAX) Is it possible to use MySQL with DataSourceUserManager since MySQL does not support transactions? Regards, Juha Lehtonen FA Solutions
Macromedia Generator and Orion
Hi, does anybody have experiences how to run Macromedia Generator under Orion? I appreciate any hint... Regards Berny -- Berny Woehrlin system development - web consulting mail: [EMAIL PROTECTED] location: Hamburg, Germany
RE: orion server works with jdk 1.3???
My test suite includes 15 CMPEBs controlled by one SLSB which is instantiated by a servlet. The test logs in to the app and then performs an insert, update, and delete on every entity. I am getting the high 200's in transactions per second on my 2 cpu box with RH7. I get over 2000 TPS on my 8 box cluster with the added assurance that if a box or two or three goes down I only lose a little performance, not my whole site. :) TurboLinux server rocks. The only time I have had the JDK crash on me was when I was using RH6.2(I am sure this is because of a flaky so) or the hardware drivers were flaky (I know the Tulip driver and some of the 3Com NIC drivers are flaky). That's it. I have found that most of the time Linux segfaults like the one you are describing are a deeper issue then just the JDK. All in all I am thrilled with Orion's performance. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Daniel G. Koulomzin Sent: Tuesday, November 14, 2000 3:47 PM To: Orion-Interest Subject: Re: orion server works with jdk 1.3??? Russ, I get the following error after 5 minutes of JMeter when I run Sun jdk1.3 on a Red Hat 7 machine. Granted, this RH7 was upgraded from RH6.2, and not a clean install, which produces results that are ... quirky... at best. You've never gotten this? What "parts" of Orion do you use? My app is a bunch of EJBs, and a few Servlets (including Turbine). -Dan # # HotSpot Virtual Machine Error, Internal Error # Please report this error at # http://java.sun.com/cgi-bin/bugreport.cgi # # Error ID: 43113F32554E54494D45110E43505002C5 # # Problematic Thread: prio=1 tid=0x82463b0 nid=0xeda suspended # Russ White wrote: I am running Orion under Linux(RedHat 7) with Sun's JDK 1.3 with absolutely wonderful stability. I would look more closely at your particular setup to see why your server is crashing. I have load tested it to the max with JMeter and my own load tester and found it almost as well behaved as Apache. You may check your heap size, and make sure you have plenty of memory. I run 2gig of ram for production boxes. I am also running Orion on an 8 box TurboLinux cluster. This setup will be going live next week. Orion on Linux simply rocks.The only problem I have ever had was a poorly written written tulip Ethernet driver (produced segfaults under load) which I rewrote and solved. Now the box is using gigabit Ethernet and screams through requests. Russ-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Daniel G. Koulomzin Sent: Tuesday, November 14, 2000 10:50 AM To: Orion-Interest Subject: Re: orion server works with jdk 1.3??? Gerald, You speak as if you have gotten Orion to run under a Linux jdk1.3... any Linux jdk1.3 I run Orion on seems to Segfault after about 5 minutes of continuous HTTP requests. To be fair, I don't think this would happen under Windows... which isn't to say I want to use Windows... but lets be fair. -Dan Gerald Gutierrez wrote: You're probably using Windows. This wouldn't happen on Linux. Somewhere, you've messed up the registry key that indicates what version of the Java Runtime you supposedly have installed. The easiest thing is to uninstall JDK1.3, and then reinstall it again. At 09:16 AM 11/14/2000 +, you wrote: hi, I used to work with orion server with jdk 1.2.2. Recently I installed jdk 1.3 and uninstalled jdk 1.2.2. Now I am not able to start orion server. I get the error message saying that could not find version number 1.3 for jre in program files/java soft/jre. any idea? thanks in advance. krishna ___ _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. -- Daniel G. Koulomzin Digital Media On Demand 244 Brighton Ave. 3rd Floor Allston MA 02134 -- Daniel G. Koulomzin Digital Media On Demand 244 Brighton Ave. 3rd Floor Allston MA 02134
I have solved the security problem in Orion
Although a lot of you do not seem to be using security yet as no one has answered my posts, Well i have not solved it, it is a Bug. The bug is that a two or more security roles cannot have access to the same methods. for example say i have a method on Mybean called. methodA() and i have 2 defined security roles: security-role descriptionrole 1/description role-namerole1/role-name /security-role security-role descriptionrole 2/description role-namerole2/role-name /security-role then this method permission configuration is not possible in orion. method-permission descriptionpeter/description role-namerole1/role-name method ejb-nameejb/MYBean/ejb-name method-namemethodA/method-name /method /method-permission method-permission descriptionpeter/description role-namerole2/role-name method ejb-nameejb/MYBean/ejb-name method-namemethodA/method-name /method /method-permission This says that both "role1" and "role2" have access to call methodA. However if i have a user who is in "role2" (eg by putting them in an orion group that is mapped to role1) if i try to access methodA then then Orion will only check if user1 is in "role1" (eg by checking if the user is in an orion group mapped to role1). If they are not (as in this case), Orion does not check if they are in role2 (eg by checking if the user is in an orion group mapped to role2). It seem to me orion checks the first role that can access a method an uses that role. So you get a one to one relationship between methods and roles. so the relationship above is: methodA can be accessed by "role1" So a solution to this. One role per method. This means we have this. security-role descriptionrole 1/description role-namerole1/role-name /security-role security-role descriptionrole 2/description role-namerole2/role-name /security-role method-permission descriptionpeter/description role-namerole1/role-name method ejb-nameejb/MYBean/ejb-name method-namemethodA/method-name /method /method-permission method-permission descriptionpeter/description role-namerole2/role-name method ejb-nameejb/MYBean/ejb-name method-namemethodB/method-name /method /method-permission methodA accessed by role1 methodB accessed by role2 So if i want a user to access methodA and methodB then they have to be in role1 and role2, no this works fine because Orion has a one to one relationship. HOWEVER: As we know this is a bug and the relationship between methods and roles should be one to many. A method can be accessed by many roles. So in one of my requirements i have a method methodA() That needs to be access by 2 roles "super" and "editor". Now role "super" can always access the method and execute the contents. However role "editor" can always access the method but depending on an internal value then role "editor" may or may not be able to excute the contents of the method. So i need a one to many mapping between my methodA and my two roles. This is not possible at the moment. Comments...
RE: JDK1.3 and deb. linux
there is an incompatibility between Debian and the JDK (any JDK I tried). The lib is there, but is not found for some reason. I installed Helix-gnome and the problem went away. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jostein Martinsen Sent: Wednesday, November 15, 2000 13:01 To: Orion-Interest Subject: JDK1.3 and deb. linux Help ! When i try to start orionserver i get this msg: "error in loading shared libraries: libstdc++-libc6.1-1.so.2: cannot open shared object file: No such file or directory" I'm running the newest version of Debian Linux and Sun:s jdk1.3 ''' Jostein Martinsen [EMAIL PROTECTED] PGP keys fingerprint. Ensure my keys validity! E2CF AF07 B50C 7A99 8EFB 23EA 1D0D E462 CE6B 551C ''
RE: PHP servlet problems
Thanks Sean. That's exactly the setup I'm running, I've tried swapping the CGIServlet for the php one but still the same result. Any more ideas would be appreciated. Tim. -Original Message- From: Sean Leach [mailto:[EMAIL PROTECTED]] Sent: 14 November 2000 16:02 To: Orion-Interest Subject: RE: PHP servlet problems I have it setup and running fine, I use: servlet servlet-namephp/servlet-name servlet-classcom.evermind.server.http.CGIServlet/servlet-class init-param param-nameinterpreter/param-name param-valuephp/param-value /init-param /servlet servlet-mapping servlet-namephp/servlet-name url-pattern/*.php/url-pattern /servlet-mapping servlet-mapping servlet-namephp/servlet-name url-pattern/*.phtml/url-pattern /servlet-mapping etc... And it works great for me. Hope this helps. Good luck! Sean - Sean Leach Director of Technology | eBusiness Services NetLojix Communications, Inc. NASDAQ: NETX e - [EMAIL PROTECTED] v - 805.884.6375 f - 805.883.5627 w - www.netlojix.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Tim Squires Sent: Tuesday, November 14, 2000 5:44 AM To: Orion-Interest Subject: PHP servlet problems Hi, I have a few php things I would like to run on my Orion server so I installed the php servlet: In global-web-application.xml changed: servlet-classcom.evermind.server.http.CGIServlet/s ervlet-class to servlet-classnet.php.servlet/servlet-class Put the phpsrvlt.jar into the jdk1.3/jre/lib/ext/ directory. Made sure that php runs on the command line. Restarted the Orion server (using admin.jar then rebooting the whole system just to make sure...) When I access the following page: html body ?php echo "Hello"; ? /body /html I receive the following page: !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" HTMLHEAD META http-equiv=Content-Type content="text/html; charset=windows-1252"/HEAD BODY/BODY/HTML I've tried a few other php pages that work and they deliver the same, but after 3 or 4 pages I am shown the following error: 500 Internal Server Error java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:486) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111) at java.net.URLClassLoader.defineClass(URLClassLoader.java:248) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:297) at java.lang.ClassLoader.loadClass(ClassLoader.java:290) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286) at java.lang.ClassLoader.loadClass(ClassLoader.java:290) at java.lang.ClassLoader.loadClass(ClassLoader.java:253) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:195) at com.evermind.server.http.HttpApplication.wo(JAX) at com.evermind.server.http.HttpApplication.v6(JAX) at com.evermind.server.http.HttpApplication.uh(JAX) at com.evermind.server.http.ed.sp(JAX) at com.evermind.server.http.ed.so(JAX) at com.evermind.util.f.run(JAX) I changed back to the CGIServlet but it came up with the same error, even after rebooting. If anyone has PHP running, could they point out what I have missed or done wrong? Thanks for your time, Tim. Tim Squires It's not what you know, it's who you tell.
RE: EJB Performance Question.
The idea behind a bulk accessor is to return a single
object that holds all the data of your EJB.
(Forgive me for any syntax mistakes. I'm doing this
from heart and I've done so much EJB2.0 stuff that my
1.1 is a little rusty.)
If you have an EJB like this:
public class FooEJB implements EntityBean
{
public String data1;
public String data2;
public int data3;
...
// this is a bulk accessor
public FooView getFoo()
{
return new FooView(data1, data2, data3);
}
}
You would create a "view" object that can hold all
the EJB data. A view is a very thin "bean-like"
object:
public class FooView
{
String data1;
String data2;
int data3;
public String getData1() { return data1; }
public String getData2() { return data2; }
public int getData3() { return data3; }
public FooView(String data1, String data2, int data3)
{
this.data1 = data1;
this.data2 = data2;
this.data3 = data3;
}
}
Now you client only need to call:
FooView fv = fooejb.getFooView();
to get all the data within the Foo EJB. This reduces
the RMI marshalling to a single call. Then, you use
the FooView accessors to get to the data; since FooView
is a local object, this will be fast.
NOTE: if you followed this thread, you heard from others
that Orion optimizes intra-VM EJB calls to "call-by-value"
which doesn't use RMI. This is great for Orion, but is
not specified in the spec, so if you were to port your
application to another container, you aren't guaranteed
this optimization. The above bulk accessor/View pattern
will always work.
-tim
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 14, 2000 7:04 PM
To: Orion-Interest
Subject: Re: EJB Performance Question.
Thank You for your kind reply. Can I get some pseudo-code an example?
Thank you.
- Original Message -
From: Tim Drury
To: Orion-Interest
Sent: Wednesday, November 15, 2000 12:03 AM
Subject: RE: EJB Performance Question.
Every single one of those calls to dir.getXXX() has to go across
the network via RMI. This is slow. You are better off using a
bulk accessor pattern. For example, create a new class called
DirView which contains all the attributes of your Dir EJB. Then
make a single call to the Dir EJB to get a DirView. This will cause
only 1 RMI call and save you a huge amount of time.
Do you understand? I can probably pseudo-code an example
if necessary.
-tim
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 14, 2000 3:56 AM
To: Orion-Interest
Subject: EJB Performance Question.
Hi, every one. First i'm sorry for my english.
We use servlet that call EJB. Next is code fraction.
//---
public Vector findByFirstPage(DirHome home, Integer rowCount) throws
Exception{
Vector rows = new Vector();
Dir dir = null;
System.out.println("step 11 time : " + (new java.util.Date()));
// call EJB
Collection col = home.findByFirstPage(rowCount.intValue());
Iterator iter = col.iterator();
System.out.println("step 12 time : " + (new java.util.Date()));
while(iter.hasNext()) {
dir = (Dir)iter.next();
rows.add(EJBToRow(dir)); //--- bottle neck #
}
System.out.println("step 13 time : " + (new java.util.Date()));
return rows;
}
//---
Simple code. In while loop, EJBToRow() method take 3 second each call.
Next code is EJBToRow(). Very Simple. Only call EJB Meber methods.
//---
public Vector EJBToRow(Dir dir) throws Exception {
Vector row = new Vector();
System.out.println("step 21 time : " + (new java.util.Date()));
row.add(dir.getId());
row.add(new Long(dir.getPId()));
row.add(dir.getName());
row.add(new Long(dir.getSerial()));
row.add(new Long(dir.getChildCount()));
row.add(new Long(dir.getDepth()));
row.add(dir.getPMap());
row.add(dir.getType());
row.add(dir.getUserId());
row.add(dir.getGroupId());
row.add(dir.getOwnerPermR());
row.add(dir.getOwnerPermW());
row.add(dir.getOwnerPermX());
row.add(dir.getGroupPermR());
row.add(dir.getGroupPermW());
row.add(dir.getGroupPermX());
row.add(dir.getOtherPermR());
row.add(dir.getOtherPermW());
row.add(dir.getOtherPermX());
row.add(dir.getCreateDate());
row.add(dir.getUpdateDate());
row.add(dir.getExpireDate());
row.add(dir.getRemark());
System.out.println("step 22 time : " + (new java.util.Date()));
return row;
}
//---
What's the key problem?
e-mail
site: [EMAIL PROTECTED]
: www.javanuri.comÀüÈ
mobile : 02-6257-3002
: 019-255-2855
RE: Any Open Source Java Object database
Try http://www.xl2.net/ and/or http://www.ozone-db.org/ I've used neither so I can't say how good they are md -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Scott M Stark Sent: Tuesday, November 14, 2000 4:24 PM To: Orion-Interest Subject: Re: Any Open Source Java Object database cloudscape is pure Java, but it is not an OpenSource offering. - Original Message - From: [EMAIL PROTECTED] To: "Orion-Interest" [EMAIL PROTECTED] Sent: Tuesday, November 14, 2000 1:04 PM Subject: Re: Any Open Source Java Object database check out cloudscape at www.informix.com Ted Slusser
Re: Problems with MySQL and DataSourceUserManager
hi! i had the same problem with the WebLogic Server. the problem is that MySQL does not support transactions as of version 2.22.x. there is beta quality transaction support in the current development branch (2.23.x) but i had very serious problems with the latest version (lost data). personally i advice you not to use mysql until it is ready for production use. i would have a look at the 7.1 version of postgresql which is currently available through cvs as far as i know. yours, lars Am Mittwoch 15 November 2000 12:22 schrieben Sie: Hi Is anyone using DataSourceUserManager with MySQL database? We have been using it with PostgreSQL without any problems, but when we switched to MySQL, DataSourceUserManager throws an exception DataSourceUserManager.getUser 8.11.2000 14:29 ANALYYTIKKO-web: Error in UserManager java.lang.RuntimeException: SQLException: Can't call commit when autocommit=true at com.evermind.sql.DataSourceUserManager.getUser(JAX) at com.evermind.server.http.EvermindHttpServletRequest.yf(JAX) at com.evermind.server.http.HttpApplication.vk(JAX) at com.evermind.server.http.HttpApplication.uh(JAX) at com.evermind.server.http.ed.sp(JAX) at com.evermind.server.http.ed.so(JAX) at com.evermind.util.f.run(JAX) Is it possible to use MySQL with DataSourceUserManager since MySQL does not support transactions? Regards, Juha Lehtonen FA Solutions
EJB Assembler tool
Did somebody successfull use the EJB Assembler tool? When adding a bean the tool tells me that it is unable to find the bean class also if I add the classes to my classpath. Alexander Sparkowsky LambdaLogic Informationssysteme GmbH, Berlin, Germany Tel: +49-30-2936385-0, Fax: +49-30-2936385-0 E-Mail: [EMAIL PROTECTED]
RE: EJB Basics
I think you simply do a jar myfile.WAR /path or something like that. A WAR and a EAR are a JAR with different extensions. -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Widmer, KarlSent: Wednesday, November 15, 2000 3:39 AMTo: Orion-InterestSubject: RE: EJB Basics I am new to Orion but have experience of Java and have used thejar process several times to archive classes. However, has anyone got an example of using jar tocreate a Web Application war file that includes jsp and bean classes. Thanks for any help. -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kevin DuffeySent: 15 November 2000 08:50To: Orion-InterestSubject: RE: EJB Basics Hmm..something I think I can answer..at least to some degree. WEB-INF is a dir usually below each Web Apps WWW dir. WEB-INF is where you would place your compiled classes (WEB-INF/classes) and any 3rd party libraries you would use (WEB-INF/lib). You also have a Servlet 2.2 standard web-app descriptor, called web.xml. This is where you map servlets, set up welcome files, and so on. The .WAR file type is really nothing more than a www dir jarred up (.jar) but with a .war extension. It includes the www folder, and the WEB-INF folder below it, with the compiled classes of the servlets/javabeans/core classes, and 3rd party libraries. You can deploy a single .war file into any J2EE app server that properly implements the spec. Actually, it can be deployed into any Servlet 2.2 container. ServletExec and Resin are two engines that are not J2EE app servers, but do manage Servlet 2.2/JSP 1.1. META-INF is, as far as I know, where a J2EE standard application.xml descriptor goes, and is part of the .EAR file format, which can include many web-apps (many www with WEB-INF dirs below each), as well as EJBs. A single EAR is considered an application in itself, probably because you can deploy EJBs into any J2EE app server using an EAR (if that app server supports EARs). I don't know the full gist of EAR but I do know Orion supports it, including hot-swap (at least I think it supports hot-swap) of EAR applications. I am not sure of the full benefit of EAR over WAR, other than that you can contain many WAR files in a single EAR, as well as any number of EJB's. EAR stands for Enterprise Application aRchive, whereas WAR stands for Web Applicat aRchive. Hope that sheds a little light on the topic. -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark A. RichmanSent: Tuesday, November 14, 2000 10:01 AMTo: Orion-InterestSubject: EJB Basics What is the difference between WEB-INF and META-INF? How do these directory structures relate to jar, ear, and war files? Which of these is J2EE, and which is Orion-specific? Maybe I am confusing something with Tomcat... - Mark MetaPack The Lightwell 12/16 Laystall Street Clerkenwell London EC1R 4PF Tel: 020 7843 6720 Fax: 020 7843 6721 -- This email is confidential and proprietary; all information contained in it must be used only by the addressee in accordance with MetaPack's terms of business and non-disclosure agreement. Disclosure, copying, and distribution to, or use by, anyone other than the intended recipient is strictly prohibited and may be unlawful.
RE: REPOST: Multiple websites on one server not found [NEED HELP]
Sorry about my lack of lucidity. I would like to have 3 web sites up and running under one Orion server. I want the default website (the one that Orion displays by default) to display when the user types http://myserver, I want my cs2k site to come up when the user enters http://myserver/cs2k, and I would like http://myserver/twsm to display my other site. Currently, whichever site's application tag is defined first in server.xml is the one that gets mapped to http://myserver, and neither of the other two URL's work. These sites consist mostly of jsp's and servlets, but I am not sure about any EJBs that might be present. We have various beans littering the classpath, but the sites seem to be functioning properly in and of themselves. I guess I'm just confused about how to set up multiple websites under the same Orion server, and it seems that everyone on this list has a different opinion of how to do that. :) At 05:35 PM 11/14/2000 -0600, you wrote: Do you want 3 web sites? Or one web site that uses 3 web applications? Perhaps you could clarify your problem for us in a line or two? -mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Drew Kidder Sent: Wednesday, November 15, 2000 3:33 AM To: Orion-Interest Subject: Re: REPOST: Multiple websites on one server not found [NEED HELP] At 01:58 PM 11/13/2000 -0600, you wrote: THE SETUP (in $ORION_HOME/config, on host "orionhost") 1. I have a web-site.xml file for each of the two sites that I want to run under Orion (cs2k-web-site.xml and twsm-web-site.xml). Each file contains a line like this (sub "cs2k" in for "twsm" for cs2k-web-site.xml): default-web-app application="twsm" name="twsm-web" shared="true" root="/twsm" / this doesn't make sense. the default-web-app of a site is always mounted to "/". what you want is probably one web-site.xml that reads default-web-app application="whatever" name="whatever" root="/" / web-app application="twsm" name="twsm-web" root="/twsm" / web-app application="cs2k" name="cs2k-web" root="/cs2k" / HTH robert I have 3 separate web-site files: default-web-site.xml, cs2k-web-site.xml, and twsm-web-site.xml. I removed the default-web-app tag from the cs2k and twsm files, and I got an error when Orion tried to re-deploy that said that there was no default website defined for either application. I added the default-web-app tag back in, but this time did not add the "root" attribute. The apps deployed correctly, but the problem is still not resolved. I also went so far as to add context-root tags to each site's META-INF/application.xml, and those did no good either. I have included the relevant config files in a small zip attached to this note. You can see what I've done, and hopefully where I've munged up the works. The only file that I have modified but not included here is each site's respective application.xml file, and the only mods that I have done to either is to add the following lines: module web web-uritwsm-web/web-uri context-roottwsm//context-root /web /module (sub "cs2k" for "twsm" and you have the mods to the cs2k application.xml.) The context-root does nothing, in my tests. I may as well not have it defined. -- Andrew Kidder L3 SW/Support Engineer, IBU Tivoli Systems 512-436-4544 [EMAIL PROTECTED] http://www.tivoli.com
Re: Where is Orion's copy of ejb-jar dtd?
Hi all ! I am just beginning to evaluate orion for our needs but i get stuck with the same error : Error loading package at file:[]/helloworld-ejb.jar, Error parsing META-INF/ejb-jar.xml in [...]/helloworld-ejb.jar: Fatal error at line 377: Character conversion error: "Unconvertible UTF-8 character beginning with 0x91" (line number may be too low). thanks for any help... rodolphe this is my ejb.jar.xml : - ?xml version="1.0"? !DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 1.1//EN' 'http://java.sun.com/j2ee/dtds/ejb-jar_1_1.dtd' ejb-jar display-nameHelloWorld Bean jar/display-name descriptionA simple HelloWorld/description enterprise-beans session display-nameHelloWorld/display-name descriptionA simple HelloWorld/description ejb-namecom.genesys.is.helloworld.ejb.HelloWorld/ejb-name homecom.genesys.is.helloworld.ejb.HelloWorldHome/home remotecom.genesys.is.helloworld.ejb.HelloWorld/remote ejb-classcom.genesys.is.helloworld.ejb.HelloWorldEJB/ejb-class session-typeStateless/session-type transaction-typeContainer/transaction-type /session /enterprise-beans assembly-descriptor /assembly-descriptor /ejb-jar - it's in orion.jar in the META-INF dir but it's just the official sun version as far as I know. your errors don't indicate that it's a dtd problem. the first looks like you use non-7bit-ascii characters and didn't declare the correct encoding in your xml (just a guess). robert At 08:00 07.11.00 , you wrote: The reason I ask is that I think it' screwed up. When I try to run an app with -validateXML turned on i get: Error loading package at file:/C:/@web/ClassNotes/EjbJmsJndi/@StudentEjbApp/, Error parsing META-INF /ejb-jar.xml in C:\@web\ClassNotes\EjbJmsJndi\@StudentEjbApp: Fatal error at line 377: Character conversion error: "Unconvertible UTF-8 character beginning with 0x91" (line number may be too low). When I run it again using the xerces parser I get: Error loading package at file:/C:/@web/ClassNotes/EjbJmsJndi/@StudentEjbApp/, Error parsing META-INF /ejb-jar.xml in C:\@web\ClassNotes\EjbJmsJndi\@StudentEjbApp: Fatal error at line 912 offset 1: A ') ' is required in the declaration of element type "role-source". Warning at line 1: Valid documents must have a !DOCTYPE declaration. Fatal error at line 1: Document root element is missing. Dave Ford Smart Soft - The Java Training Company http://www.SmartSoftTraining.com
Re: JDK1.3 and deb. linux
I use Debian Potato 2.2 without problems. I' tried Sun JDK1.2.2, Sun JDK1.3 and IBM JDK1.3, all of then without problems on Debian Potato. Have you updated you system? I'd sugest you to do: apt-get update apt-get upgrade Doing this, you will get installed the latest versions of your packages, including glibc 2.1. []s Guilherme Ceschiatti [EMAIL PROTECTED] On Wednesday 15 November 2000 12:09, you wrote: there is an incompatibility between Debian and the JDK (any JDK I tried). The lib is there, but is not found for some reason. I installed Helix-gnome and the problem went away. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jostein Martinsen Sent: Wednesday, November 15, 2000 13:01 To: Orion-Interest Subject: JDK1.3 and deb. linux Help ! When i try to start orionserver i get this msg: "error in loading shared libraries: libstdc++-libc6.1-1.so.2: cannot open shared object file: No such file or directory" I'm running the newest version of Debian Linux and Sun:s jdk1.3 ''' Jostein Martinsen [EMAIL PROTECTED] PGP keys fingerprint. Ensure my keys validity! E2CF AF07 B50C 7A99 8EFB 23EA 1D0D E462 CE6B 551C ''
Re: EJB Assembler tool
I've found that you need to add the class files to the "files" section of the EJB assembler before it'll find anything. Right click and do the "import" on the "files" section displayed on the left of the screen. At 04:39 PM 11/15/2000 +0100, you wrote: Did somebody successfull use the EJB Assembler tool? When adding a bean the tool tells me that it is unable to find the bean class also if I add the classes to my classpath. Alexander Sparkowsky LambdaLogic Informationssysteme GmbH, Berlin, Germany Tel: +49-30-2936385-0, Fax: +49-30-2936385-0 E-Mail: [EMAIL PROTECTED]
EJB using core classes?
Hi all, I am attempting (again) deploying EJB. While I think I have the pricipals down, (still trying to figure out JNDI properties..what they are for), I am confused about one thing. I have an application named ss. In Orion I have set the path to c:\ss. There is the META-INF dir, which I have application.xml in..that points has module ejbss.jar/ejb /module. It also has my web module in it that points to www (from ss..so ss/www). I compile my ejb (a simple login ejb) which seems to be ok. In the ss.jar, I have the META-INF dir with ejb-jar.xml in it accessing my com.ss.ejb.login.LoginXXX classes. These are Stateless session classes. I also have in the ejb-jar.xml file the com/ss/ejb/login/LoginSessionEJB.class, and so on. So when I start up Orion, it shows its deploying the EJB, however..it says it can't find class core/login/Login.class. Now..in my package, I have ss.core, ss.ejb, and ss.ui. ss.core.login.Login is a "bean" that I will use in both the EJB entity class, and my UI javabean class. I don't know if this is the wrong way to do it, but I figure..why put the same getter/setter methods twice (in both the UI javabean class that gets/sets the JSP page form info, and the EJB class that loads/stores the same info). I am not too familiar with EJB just yet, but I see no reason why this wouldn't work. In my entity bean, I would somehow reference the core.login.Login class, and use that reference to load/store the entity. Can that even be done? Or is the only way to get entity beans via CMP to work is directly have the methods in the entity? I would think if my methods that are used to load/store the entity use the reference to get/set the fields of the reference Login, this should be ok. At any rate..my main question here is, the EJB class in the jar file is referencing the core class. I don't have the core package in the jar file. I thought if I deployed the jar file into the same web-app as the other classes were in, it would have access to these classes. I compile classes to WEB-INF/classes. Is this not the case? Is there some trickery to getting EJB classes to see the WEB-INF/classes? Thanks for any help.
RE: EJB Performance Question.
At 10:11 AM 11/15/2000 +0100, you wrote: At 14:48 14.11.00 , you wrote: Thanks Robert. I think I'll try running some benchmarks this week and post the results. I wonder.. is there a way for and EJB-EJB to be _forced_ to go through RMI? i.e. can I turn this optimization off? I don't think there is a documented way to to this. Not to be a jerk but to provide some constructive criticism to Orion ... I don't think there is a documented way to do many, many things. Considering that it is a closed-source product, I think documentation should be one of the most important things to accompany the actual binaries.
RE: ClassCastException servletproblem
Use
the Java Reflections utilities. Issue myObject.getClass().getName() on the
object that you are trying to cast to something and print it out... the variable
you call statement... is that a JDBC statement? If it is you should not cast it
to whatever the jdbc driver vendor has implemented it as.
regards,
Patrik
Andersson
-Original Message-From: Erik Sundberg
[mailto:[EMAIL PROTECTED]]Sent: den 14 november 2000
22:10To: Orion-InterestSubject: ClassCastException
servletproblem
hi,
Just started doing servlet programming and using
Orion.
I made this servlet which compiles just fine but
at runtime
the server responde with a ClassCastException and
I just
can´t understand why. Here is where I get
the errors:
cpool =
(ConnectionPool)context.getAttribute("cpool");
org.gjt.mm.mysql.Statement state =
(org.gjt.mm.mysql.Statement)statement;
the ConnectionPool class is placed in the same
package as the
Servlet and the jdbc driver is in the /lib
dir.
I hope this explains my problem, hope anyone can
help me
I have spent alot of time trying to find out what
can be wrong.
The casts is legal for sure.
thanks,
-erik
RE: REPOST: Multiple websites on one server not found [NEED HELP]
At 09:52 15.11.00 , you wrote: Sorry about my lack of lucidity. I would like to have 3 web sites up and running under one Orion server. I want the default website (the one that Orion displays by default) to display when the user types http://myserver, I want my cs2k site to come up when the user enters http://myserver/cs2k, and I would like http://myserver/twsm to display my other site. Currently, whichever site's application tag is defined first in server.xml is the one that gets mapped to http://myserver, and neither of the other two URL's work. These sites consist mostly of jsp's and servlets, but I am not sure about any EJBs that might be present. We have various beans littering the classpath, but the sites seem to be functioning properly in and of themselves. I guess I'm just confused about how to set up multiple websites under the same Orion server, and it seems that everyone on this list has a different opinion of how to do that. :) no, you have to get the terminology right, so people understand what you're trying to do ;-). you DON'T want to set up 3 websites in j2ee/orion terminology but have one website witth three web applications. your website is http://myserver. you got answers to set up different websites by the people who thought you wanted to do that because you said so and you got answers to set up one website with three web applications because that's what you described as in this email and the ones before. web site == one address like http://myserver (which will have a default web application mounted at "/") web application == twsm which you want to mount to the website http://myserver under "/twsm" which results in http://myserver/twsm hope this clears up the confusion and of course it's all your fault ;-). best regards, robert (-) Robert Krüger (-) SIGNAL 7 Gesellschaft für Informationstechnologie mbH (-) Brüder-Knauß-Str. 79 - 64285 Darmstadt, (-) Tel: 06151 665401, Fax: 06151 665373 (-) [EMAIL PROTECTED], www.signal7.de
Re: EJB using core classes?
snip/ At any rate..my main question here is, the EJB class in the jar file is referencing the core class. I don't have the core package in the jar file. I thought if I deployed the jar file into the same web-app as the other classes were in, it would have access to these classes. I compile classes to WEB-INF/classes. Is this not the case? Is there some trickery to getting EJB classes to see the WEB-INF/classes? no, it's impossible and not meant to be that way. two possible cases: - your class is not application specific but a general utility in which case you could put it in a library that is specified in the library path of global-application and therefore visible for all web an ejb modules in all application or you have to explicitly put it where the ejb code gets it - it is application specific and used by both web an ejb then you have to put it in a separate jar which you reference in orion-application.xml (or the dir it's located in, look at the library element) and it will be visible to both ejb and web modules. HTH robert Thanks for any help. (-) Robert Krüger (-) SIGNAL 7 Gesellschaft für Informationstechnologie mbH (-) Brüder-Knauß-Str. 79 - 64285 Darmstadt, (-) Tel: 06151 665401, Fax: 06151 665373 (-) [EMAIL PROTECTED], www.signal7.de
specify datasource for entity bean
Hi, I may have missed it in the docs but I can't figure out how to configure the datasource a CMP entity bean uses for persistence. I can change the orion-ejb-jar.xml file that is auto-created when the beans are deployed but how can I change it _before_ deploying the bean? Thanks, Ted Slusser
RE: specify datasource for entity bean
Put orion-ejb-jar.xml in this directory: /ear/ejb/orion/orion-ejb-jar.xml .ie /ear/ejb/META-INF/ejb-jar.xml /ear/ejb/orion/orion-ejb-jar.xml Normally I deploy first, and then move the created orion-ejb-jar.xml from application-deployments to this location. I believe it is also possible to create an orion-ejb-jar.xml yourself, and Orion will add any necessary additional tags. -Original Message- From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]] Sent: November 15, 2000 12:52 PM To: Orion-Interest Subject: specify datasource for entity bean Hi, I may have missed it in the docs but I can't figure out how to configure the datasource a CMP entity bean uses for persistence. I can change the orion-ejb-jar.xml file that is auto-created when the beans are deployed but how can I change it _before_ deploying the bean? Thanks, Ted Slusser
Turning off Auto-create Tables
I am trying to deploy an app that uses CMP to connect to an Interbase server via the Interclient driver. On deploy, Orion starts auto-creating tables that I don't need (since the database already exists) and gives me the error below. How can I turn auto-create off or point it at the right DB? java.lang.VerifyError: (class: interbase/interclient/ErrorKey, method: _$372 signature: (Ljava/lang/String;Ljava/lang/String;I)V) Expecting to find unitialized object on stack at interbase.interclient.SQLException.init(SQLException.java:96)... Thanks, Marc
Re: specify datasource for entity bean
Put it inside the EAR file; I believe it goes into a special "orion" directory. I think that directory is called "orion" and is a sibling to META-INF. You can also do it on an application scope with orion-application.xml. At 11:52 AM 11/15/2000 -0600, you wrote: Hi, I may have missed it in the docs but I can't figure out how to configure the datasource a CMP entity bean uses for persistence. I can change the orion-ejb-jar.xml file that is auto-created when the beans are deployed but how can I change it _before_ deploying the bean? Thanks, Ted Slusser
Re: EJB using core classes?
Uhh ... isn't this unnecessarily vendor-specific? I've had utility classes used by both web and ejb layers and I just stick them with the EJB JAR file and things seem to work out fine. At 06:20 PM 11/15/2000 +0100, you wrote: snip/ At any rate..my main question here is, the EJB class in the jar file is referencing the core class. I don't have the core package in the jar file. I thought if I deployed the jar file into the same web-app as the other classes were in, it would have access to these classes. I compile classes to WEB-INF/classes. Is this not the case? Is there some trickery to getting EJB classes to see the WEB-INF/classes? no, it's impossible and not meant to be that way. two possible cases: - your class is not application specific but a general utility in which case you could put it in a library that is specified in the library path of global-application and therefore visible for all web an ejb modules in all application or you have to explicitly put it where the ejb code gets it - it is application specific and used by both web an ejb then you have to put it in a separate jar which you reference in orion-application.xml (or the dir it's located in, look at the library element) and it will be visible to both ejb and web modules. HTH robert Thanks for any help. (-) Robert Krüger (-) SIGNAL 7 Gesellschaft für Informationstechnologie mbH (-) Brüder-Knauß-Str. 79 - 64285 Darmstadt, (-) Tel: 06151 665401, Fax: 06151 665373 (-) [EMAIL PROTECTED], www.signal7.de
Custom Tags Bug? Please help...
Hello, I have questions about custom tags, I don't know for sure they are bugs but they seem like it. BUG #1 I have a custom tag with a required attribute called "class". When I use it in a page the compiler displays an error like: 500 Internal Server Error Error parsing JSP page /webdev/advtags/forTag.jsp line 13 Property 'class' of bean/tag 'com.taglib.wdjsp.mut.ForPropertyTag' is read only The tag has a "setClass" method. Why is this happening? If I change the attribute name to anything else it works! BUG #2 The method "isValid" from the TagExtraInfo class is getting called as many times as there are attributes in the tag...Each time the TagData object has one more attribute value? Is this correct?
Multiple threads and new InitialContext
Is new InitialContext supposed to be thread safe? It doesn't seem to be... I have a client test program that creates multiple threads, each of which does a getInitialContext. This fails about 2 times out of three, usually with a: ObjectIdMgrTest:-- Getting Initial Context -- javax.naming.NamingException: Error reading application-client descriptor: Error looking up EJBHome: Lookup error: java.io.EOFException; nested exception is: java.io.EOFException at com.evermind.server.ApplicationClientInitialContextFactory.getInitial Context(JAX) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:6 68) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246 ) at javax.naming.InitialContext.init(InitialContext.java:222) at javax.naming.InitialContext.init(InitialContext.java:178) at sbd.sd.ejb.sb.objectidmgr.ObjectIdMgrTest.getInitialContext(ObjectIdM grTest.java:305) at sbd.sd.ejb.sb.objectidmgr.ObjectIdMgrTest.run(ObjectIdMgrTest.java:16 1) at java.lang.Thread.run(Thread.java:484) occasionally it will hang instead. This is on W98, SDK 1.3.0, Orion 1.4.4. The test is straightforward; in pseudo code... private InitialContext iCtx; private final static String testName = "name of test"; main() loop: create new thread, start run() this.getInitialContext() hammer away... getInitialContext() this.iCtx = new InitialContext() to get around this I modified getInitialContext to synchronized (testName) this.iCtx = new InitialContext() This works when tried a dozen or so times. Is this an Orion bug? If not, how should it be handled? Kirk Yarina [EMAIL PROTECTED]
Re: Problems with MySQL and DataSourceUserManager
Hi, If I use EJB, can I use postgresql? I know that postgresql jdbc driver is still not jdbc2 complaint. Louis - Original Message - From: "Lars Hoss" [EMAIL PROTECTED] To: "Orion-Interest" [EMAIL PROTECTED] Sent: Wednesday, November 15, 2000 8:37 AM Subject: Re: Problems with MySQL and DataSourceUserManager hi! i had the same problem with the WebLogic Server. the problem is that MySQL does not support transactions as of version 2.22.x. there is beta quality transaction support in the current development branch (2.23.x) but i had very serious problems with the latest version (lost data). personally i advice you not to use mysql until it is ready for production use. i would have a look at the 7.1 version of postgresql which is currently available through cvs as far as i know. yours, lars Am Mittwoch 15 November 2000 12:22 schrieben Sie: Hi Is anyone using DataSourceUserManager with MySQL database? We have been using it with PostgreSQL without any problems, but when we switched to MySQL, DataSourceUserManager throws an exception DataSourceUserManager.getUser 8.11.2000 14:29 ANALYYTIKKO-web: Error in UserManager java.lang.RuntimeException: SQLException: Can't call commit when autocommit=true at com.evermind.sql.DataSourceUserManager.getUser(JAX) at com.evermind.server.http.EvermindHttpServletRequest.yf(JAX) at com.evermind.server.http.HttpApplication.vk(JAX) at com.evermind.server.http.HttpApplication.uh(JAX) at com.evermind.server.http.ed.sp(JAX) at com.evermind.server.http.ed.so(JAX) at com.evermind.util.f.run(JAX) Is it possible to use MySQL with DataSourceUserManager since MySQL does not support transactions? Regards, Juha Lehtonen FA Solutions
RE: EJB using core classes?
Thanks. That at least clears this up. What if I EAR the whole thing and deploy the EAR? Would the EJB then be able to see the classes..or at that wouldn't make any difference? -Original Message- From: Robert Krueger [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 15, 2000 9:20 AM To: Orion-Interest Subject: Re: EJB using "core" classes? snip/ At any rate..my main question here is, the EJB class in the jar file is referencing the core class. I don't have the core package in the jar file. I thought if I deployed the jar file into the same web-app as the other classes were in, it would have access to these classes. I compile classes to WEB-INF/classes. Is this not the case? Is there some trickery to getting EJB classes to see the WEB-INF/classes? no, it's impossible and not meant to be that way. two possible cases: - your class is not application specific but a general utility in which case you could put it in a library that is specified in the library path of global-application and therefore visible for all web an ejb modules in all application or you have to explicitly put it where the ejb code gets it - it is application specific and used by both web an ejb then you have to put it in a separate jar which you reference in orion-application.xml (or the dir it's located in, look at the library element) and it will be visible to both ejb and web modules. HTH robert Thanks for any help. (-) Robert Krüger (-) SIGNAL 7 Gesellschaft für Informationstechnologie mbH (-) Brüder-Knauß-Str. 79 - 64285 Darmstadt, (-) Tel: 06151 665401, Fax: 06151 665373 (-) [EMAIL PROTECTED], www.signal7.de
counter.jar
Would anyone be tremendously upset if I rewrote counter.jar based on info I get from decompiling it? I have two things in mind: 1) To make the changes needed to switch it to ejb 2.0 2) Minor optimisation in the generation of ID's (to create the initialContext once and hold onto it, rather than creating a new one at every invocation)
RE: Custom Tags Bug? Please help...
I would think class is a reserved word in java. For example MyClass.class refers to the Class of the class. I would rename it from class to myClass or something. Same for your getter/setter methods. -Original Message- From: Claudio Cordova [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 15, 2000 9:55 AM To: Orion-Interest Subject: Custom Tags Bug? Please help... Hello, I have questions about custom tags, I don't know for sure they are bugs but they seem like it. BUG #1 I have a custom tag with a required attribute called "class". When I use it in a page the compiler displays an error like: 500 Internal Server Error Error parsing JSP page /webdev/advtags/forTag.jsp line 13 Property 'class' of bean/tag 'com.taglib.wdjsp.mut.ForPropertyTag' is read only The tag has a "setClass" method. Why is this happening? If I change the attribute name to anything else it works! BUG #2 The method "isValid" from the TagExtraInfo class is getting called as many times as there are attributes in the tag...Each time the TagData object has one more attribute value? Is this correct?
Re: counter.jar
You shouldn't have to decompile it, as it's supposedly open source. Here's the message in May from Karl: http://www.mail-archive.com/orion-interest@orionserver.com/msg01478.html. Though I certainly would not mind the fixes you're proposing. -- Jason Rimmer [EMAIL PROTECTED] - Original Message - From: "Hani Suleiman" [EMAIL PROTECTED] To: "Orion-Interest" [EMAIL PROTECTED] Sent: Wednesday, November 15, 2000 4:07 PM Subject: counter.jar Would anyone be tremendously upset if I rewrote counter.jar based on info I get from decompiling it? I have two things in mind: 1) To make the changes needed to switch it to ejb 2.0 2) Minor optimisation in the generation of ID's (to create the initialContext once and hold onto it, rather than creating a new one at every invocation)
ORION and VAJ?
Briefly looking at the archives I saw this question with no real resolution so please forgive the bandwidth while I ask again. Has anyone succeeded in running Orion from within Visual Age Java? All comments welcome. john -- E-Mail: [EMAIL PROTECTED] Date: 15-Nov-00 Time: 18:39:20 This message was sent by XFMail --
Re: Client hits STOP button..is there a way to detect this beforesen ding a response?
Interesting question. My instincts say you can't win as long as your data integrity is determined by your ability to determine the exact status when the situation is inherently a race condition. That may be overly pessimistic given that it takes the client a finite amount of time to stop one transaction and start the next, but still, I'd try a different approach. For instance, give each request a serial number, hold each response in the session separately, and build the serial number into the links of the output page. Then you know it will work, but the overhead is minimal (you're assuming that this won't happen often, so it's rare that you'll have multiple results sitting in the session). I haven't run into this problem yet, so I'm glad you pointed it out ;) Gary Today, Duffey, Kevin ([EMAIL PROTECTED]) wrote: Hi, I have a need to find out if the connection back to the browser from a servlet is still good or not, before an attempt to send the response occurs. Is this possible? I know when I do a response.sendRedirect() or requestDispatcher().forward() Orion will throw an exception if the connection to the browser (or client for that matter) has been terminated. The problem is..I want to check for this before an attempt is made, so that incase the connection is lost, I don't populate the javabean. I'll give a reason why this is necessary (and very helpful). I have my code organized into JSP pages, ControllerServlet/Action classs, JavaBeans and Session classes. Session classes are STATELESS classes, so that I can get ready to move to EJB when I get time. Each time a request is submitted, it goes to an action class method to be handled. The action class instantiates a new session class (I am not bothering with a pooled setup for session classes at this point as EJB will do this for me when I move to it). The session class performs some logic..usually database acitivty of some sort. The action class is then given a result (usually a Vector of some sort of objects). The action class then sets a bean variable to point to the vector of results. The bean is stateful and is session scope (HttpSession). At the end of the action, the response is forwarded to a JSP page. That page then uses the bean and its reference to results to display them. So here is the problem. If a user submits a form (say..to search for all clients) and lets say that search will take two minutes. 10 seconds later, the client sees he/she made a mistake on what they were searching for. As if often the case..they hit STOP on the browser, change their mistake and submit the form again. On the server..there are now two threads running..because the first one hasn't completed yet (assuming the user submitted the form the 2nd time fairly quickly). The 2nd request is quick..it populates the javabean reference to a Vector of objects say in 20 seconds. The response is sent back and the user sees a list of say 20 items. Now, while they are looking over this list, the 1st request they sent is still going on. At some point it too populates the SAME javabean with its results, which are now different than what the client is actually looking at on the page. The action tries to return its response but it finds its connection was terminated. It throws an exception (which I catch), and voila..the client sees nothing. Where the problem lies though..is when the first request populates the javabean that the 2nd request already populated. So when the user clicks on say item 3 of what he sees..it refers to item 3 in the results Vector that has now been replaced with the first requests results. Therefore, the information is incorrect. So, what I am trying to do is find a way that if the connection is no longer available BEFORE the bean is populated and anything else happens, it just stops in its tracks. That way..if the user submitted another request, the first one wont repopulate the bean with information that is inaccurate to what the client is seeing. Thanks for any ideas and info on this topic.
Re: Client hits STOP button..is there a way to detect this before sending a response?
Here's another approach. Put a timestamp in your session to denote when a search request was started, and have the searcher object track this timestamp too. When you get the results back, check that the timestamps match before populating your bean. If another search had happened in the meantime, then the timestamps won't match, and so you can ensure that no mismatch happens. On Wed, 15 Nov 2000, Boris Erukhimov wrote: "Duffey, Kevin" wrote: So here is the problem. If a user submits a form (say..to search for all clients) and lets say that search will take two minutes. 10 seconds later, the client sees he/she made a mistake on what they were searching for. As if often the case..they hit STOP on the browser, change their mistake and submit the form again. On the server..there are now two threads running..because the first one hasn't completed yet (assuming the user submitted the form the 2nd time fairly quickly). The 2nd request is quick..it populates the javabean reference to a Vector of objects say in 20 seconds. The response is sent back and the user sees a list of say 20 items. Now, while they are looking over this list, the 1st request they sent is still going on. At some point it too populates the SAME javabean with its results, which are now different than what the client is actually looking at on the page. The action tries to return its response but it finds its connection was terminated. It throws an exception (which I catch), and voila..the client sees nothing. Where the problem lies though..is when the first request populates the javabean that the 2nd request already populated. So when the user clicks on say item 3 of what he sees..it refers to item 3 in the results Vector that has now been replaced with the first requests results. Therefore, the information is incorrect. Thanks for any ideas and info on this topic. I guess what you need is to implement what is called a "delayed response" to avoid make user waiting about 2 min. Here is a flow: 1. User makes search or whatever request which is handled with delayed response. Your action or session class launches a separate thread to do the actual job if let's say an "in process" flag is set to "false" or not exist in your HttpSession. If thread is launched set that flag to "true". If not (meaning thread is running) go to the step 2. 2. Your action class responds with JSP page saying "Please wait ". Put in the page a simple javascript code sending another request after some timeout, say 8 sec. 3. Your action class process incoming request and checks if flag "in process" is still on. If yes it responds with the same "Please wait..." page which will schedule another try in 8 sec. If no, it responds with your result page populated by bean, which itself uses result data passed through HttpSession from completed job thread. Note that actual job is now almost untied from browser connection. If user hits "Stop" and then decides to repeat search request still being within the same HttpSession and his previously launched job thread is not completed, he will receive "Please wait ..." page. Hope it helps ~boris
RE: Client hits STOP button..is there a way to detect this before sending a response?
Thanks for the reply.. Your idea has some merit..the only problem is, we have so many different searches and profile updates that could be happening..I would need to keep track of each of those separately. Here is what I had in mind if there isn't any way to detect ahead of time that a connection to the browser was terminted. 1) When stateless session class returns its Vector of objects, the action class creates points a "second" pointer in the bean to the results that are already there (unless they are null at that point). Then it assigns the main results variable (defined as Vector results = null; in the bean) to the new list of items. It then forwards to the page. But before it forwards, if the connection was lost and it throws the exception, in the catch() block I could just point the results reference back to the "second" pointer so it doesn't lose that..in other words..because the 2nd pointer references the old vector, the GC can't recollect it, thereby saving it..incase of a problem. In the finally block, I would set this 2nd variable to null. It should be safe to do it there..because the catch() block would execute BEFORE the finally() block..incase the connection is lost..therefore it can still assign the main results back to the 2nd variable reference before the finally() block sets it to null. Do you think this would work? My main worry is that of concurrency. What if the user hits submit, stop, submit, stop, submit, stop, and so on..several times (should never happen..most likely wont..but its still a possibility..and I like to make sure we think about all possibilities..especially these days where people purposely attack sites and bring them to a halt). If that happens, there could be x number of threads..all running at the same time. Thread 3 might finish before thread 1. Therefore, I am wondering if using only a 2nd reference variable will really be enough, or if one thread finishes in between another thread (in other words..the jvm switches to another running thread right in the middle of one running), if the variables could get screwed up. I don't want to use the Singleton model though. -Original Message- From: Hani Suleiman [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 15, 2000 3:49 PM To: Orion-Interest Subject: Re: Client hits STOP button..is there a way to detect this before sending a response? Here's another approach. Put a timestamp in your session to denote when a search request was started, and have the searcher object track this timestamp too. When you get the results back, check that the timestamps match before populating your bean. If another search had happened in the meantime, then the timestamps won't match, and so you can ensure that no mismatch happens. On Wed, 15 Nov 2000, Boris Erukhimov wrote: "Duffey, Kevin" wrote: So here is the problem. If a user submits a form (say..to search for all clients) and lets say that search will take two minutes. 10 seconds later, the client sees he/she made a mistake on what they were searching for. As if often the case..they hit STOP on the browser, change their mistake and submit the form again. On the server..there are now two threads running..because the first one hasn't completed yet (assuming the user submitted the form the 2nd time fairly quickly). The 2nd request is quick..it populates the javabean reference to a Vector of objects say in 20 seconds. The response is sent back and the user sees a list of say 20 items. Now, while they are looking over this list, the 1st request they sent is still going on. At some point it too populates the SAME javabean with its results, which are now different than what the client is actually looking at on the page. The action tries to return its response but it finds its connection was terminated. It throws an exception (which I catch), and voila..the client sees nothing. Where the problem lies though..is when the first request populates the javabean that the 2nd request already populated. So when the user clicks on say item 3 of what he sees..it refers to item 3 in the results Vector that has now been replaced with the first requests results. Therefore, the information is incorrect. Thanks for any ideas and info on this topic. I guess what you need is to implement what is called a "delayed response" to avoid make user waiting about 2 min. Here is a flow: 1. User makes search or whatever request which is handled with delayed response. Your action or session class launches a separate thread to do the actual job if let's say an "in process" flag is set to "false" or not exist in your HttpSession. If thread is launched set that flag to "true". If not (meaning thread is running) go to the step 2. 2. Your action class responds with JSP page saying "Please wait ". Put in the
RE: Client hits STOP button..is there a way to detect this before sending a response?
On Wed, 15 Nov 2000, Duffey, Kevin wrote: Thanks for the reply.. Your idea has some merit..the only problem is, we have so many different searches and profile updates that could be happening..I would need to keep track of each of those separately. Here is what I had in mind if there isn't any way to detect ahead of time that a connection to the browser was terminted. snipped I think your proposed solution seems kinda kludgy (either that, or I'm a bit slow and don't fully understand it...) also as you said it only tracks two references, and can be foiled by starting 2 long running searches, aborting them, then doing a quick third one. You don't need to keep track of each request, you just need to provide very basic tagging of results so they can be verified against requests. A slight variant: Instead of passing in the timestamp have the bean return one as part of the result, which you could then sanity check to ensure that the timestamp in the session is before the time the search bean thinks it started. If you get a mismatch, then discard the results as they're stale. This does leave a race condition, where the critical section is in between placing the timestamp in the session and the search bean creating its own timestamp, you can minimise this by synchronising your code up to (but not including!) calling the search bean, and creating the 'result' timestamp first thing in the search bean method. Here's another approach. Put a timestamp in your session to denote when a search request was started, and have the searcher object track this timestamp too. When you get the results back, check that the timestamps match before populating your bean. If another search had happened in the meantime, then the timestamps won't match, and so you can ensure that no mismatch happens.
RE: Custom Tags Bug? Please help...
It is. It's so obvious it can easily be overlooked:
For example:
public class Foo extends Object { }
How do you get a class to compile that has a field named 'class'? I
couldn't do it. The normal convention is to use the field name 'clazz' when
you mean 'class' in Java.
One thing to check is that the type of this variable is the same when its
set(Type t) and get(){ return Type t;} methods are called, and that you
aren't mixing types with a 1.3 JVM. The 1.3 JVM is stricter about some of
the JavaBean conventions.
Scott Stirling
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Duffey, Kevin
Sent: Wednesday, November 15, 2000 4:03 PM
To: Orion-Interest
Subject: RE: Custom Tags Bug? Please help...
I would think class is a reserved word in java. For example MyClass.class
refers to the Class of the class. I would rename it from class to myClass or
something. Same for your getter/setter methods.
-Original Message-
From: Claudio Cordova [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 15, 2000 9:55 AM
To: Orion-Interest
Subject: Custom Tags Bug? Please help...
Hello, I have questions about custom tags, I don't know for
sure they are
bugs but they seem like it.
BUG #1
I have a custom tag with a required attribute called "class".
When I use it
in a page the compiler displays an error like:
500 Internal Server Error
Error parsing JSP page /webdev/advtags/forTag.jsp line 13
Property 'class' of bean/tag
'com.taglib.wdjsp.mut.ForPropertyTag' is read
only
The tag has a "setClass" method. Why is this happening? If I
change the
attribute name to anything else it works!
BUG #2
The method "isValid" from the TagExtraInfo class is getting
called as many
times as there are attributes in the tag...Each time the
TagData object has
one more attribute value? Is this correct?
RE: Orion, JNDI Weblogic
In case this helps anyone else desperately searching the archives one day
hence:
The jsp *works* under Tomcat (NT), Caucho Resin 1.1.5 (NT), WebLogic (NT),
and Orion 1.3.8/JDK 1.3 on linux.
The exception occurs under Orion 1.3.8 *and* Orion 1.4.0 on NT under jdk
1.2.2 *and* jdk 1.3.
Once again, I'd appreciate if anyone had any clues; I suspect possibly a
bug, possibly a classpath conflict; I had to put a lot of weblogic classes
in the classpath, and the weblogicaux.jar has a lot of com.sun.* classes in
it, such as com.sun.java.util.collections.*, etc.
Colin
-Original Message-
From: Colin Jacobs [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 15, 2000 12:18 PM
To: Orion-Interest
Subject: Orion, JNDI Weblogic
Hi there.
We're using WebLogic on our core platform for now, alas, but I'm hoping to
go with Orion in our web farm, using it as a JSP/Servlet environment
initially, and then expanding its duties to erode on WebLogic.
I've run into a little snag in my initial test. I've got some test EJBs
deployed on weblogic, and I'm trying to use them in a simple JSP I deployed
in the orion default-web-app directory. I'm using the following JSP snippet:
%@ page contentType="text/html"
import="java.io.*,java.lang.Integer,javax.naming.*,javax.ejb.*,weblogic.comm
on.*,test.*,java.util.Hashtable" %
%
PingHome home = null;
Hashtable env = new Hashtable(5);
env.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
env.put(Context.PROVIDER_URL, "t3://cjacobs:7001");
Context ctx = new InitialContext(env);
try {
home = (PingHome) ctx.lookup("PingHome");
} catch(Exception e) {
// ...
}
%
The line "home = (PingHome) ctx.lookup("PingHome");" generates the following
exception, (full stack trace below).
javax.naming.CommunicationException [Root exception is
weblogic.rjvm.PeerGoneException:
- with nested exception:
[java.lang.NoClassDefFoundError: weblogic/service/BasicServiceStub]]
I'm kind of mystified - the class weblogic.service.BasicServiceStub *is* in
the classpath (Class.forName() doesn't generate an error).
weblogic/service/... looks like a path, not a class. WebLogic itself has
complained "Exception on send : weblogic.rmi.ConnectException: Attempt to
sendMsg using a closed connection" several times during these tests.
I only get the exception if the lookup succeeds, i.e.
ctx.lookup("SpoddySpodSpod") throws a javax.naming.NameNotFoundException as
expected.
I tried this code in Tomcat, and it worked perfectly. Any ideas?
Thanks,
Colin
javax.naming.CommunicationException. Root exception is
weblogic.rjvm.PeerGoneException:
- with nested exception:
[java.lang.NoClassDefFoundError: weblogic/service/BasicServiceStub]
at
weblogic.rmi.extensions.AbstractRequest.sendReceive(AbstractRequest.java:76)
at
weblogic.jndi.toolkit.BasicWLContext_WLStub.lookup(BasicWLContext_WLStub.jav
a:246)
at weblogic.jndi.toolkit.WLContextStub.lookup(WLContextStub.java,
Compiled Code)
at javax.naming.InitialContext.lookup(InitialContext.java:354)
at
__jspPage1_externalTest_jsp._jspService(__jspPage1_externalTest_jsp.java:58)
at com.orionserver.http.OrionHttpJspPage.service(JAX)
at com.evermind.server.http.HttpApplication.xa(JAX)
at com.evermind.server.http.JSPServlet.service(JAX)
at com.evermind.server.http.d3.so(JAX, Compiled Code)
at com.evermind.server.http.d3.sm(JAX)
at com.evermind.server.http.ef.su(JAX, Compiled Code)
at com.evermind.server.http.ef.dn(JAX, Compiled Code)
at com.evermind.util.f.run(JAX, Compiled Code)
Here's my global-web-application.xml classpath:
orion-web-app
jsp-cache-directory="./persistence"
servlet-webdir="/servlet"
development="false"
classpath path="e:\weblogic\classes" /
classpath path="e:\weblogic\lib\weblogicaux.jar" /
...
Colin Jacobs
Senior Software Engineer
Optfor Derivatives, Inc.
http://www.opt4.com
I don't pretend to have all the answers. I don't
even pretend to know what the questions are. Hey,
where am I? -- Jack Handey
Help with OR mapping
Hello, I need some help with OR mapping a CMP EntityBean. I'm not even sure how to do this in BMP. The class is called SIDDefinitions. The primary key is a class called SID and there is only one other field called definitions -- it is a List of Definition. Definition is an interface and the application allows arbitrary implementations of that interface. The primary key class, SID, has two members -- String name and a List fields. The elements of List are another class -- Field. Field has two String members -- name and value. A schematic would look like: SIDDefinitions SID String name List Field String name String value List Definition How do I even begin to map this to relations? I'm restricted to EJB 1.1. Does anyone recognize a pattern that I can use? Please help, I'm totally stumped by this. Thanks, Vidur
Correction: Help with OR mapping
Sorry, I forgot to describe that tables that I think will be required. SIDDefinitions sidID int primary key (database generated) definiitons blob SIDName sidID name primary key SIDValue sidID int fieldName String fieldValue String primary key (sidID, fieldName) Thanks, Vidur Hello, I need some help with OR mapping a CMP EntityBean. I'm not even sure how to do this in BMP. The class is called SIDDefinitions. The primary key is a class called SID and there is only one other field called definitions -- it is a List of Definition. Definition is an interface and the application allows arbitrary implementations of that interface. The primary key class, SID, has two members -- String name and a List fields. The elements of List are another class -- Field. Field has two String members -- name and value. A schematic would look like: SIDDefinitions SID String name List Field String name String value List Definition How do I even begin to map this to relations? I'm restricted to EJB 1.1. Does anyone recognize a pattern that I can use? Please help, I'm totally stumped by this. Thanks, Vidur
RE: Client hits STOP button..is there a way to detect this before sending a response?
Hi again,
Actually..I hashed out your first idea with two other guys and it seems like
it should work. Let me see if I got this straight.
1) When the action class is called..create a timestamp.
2) Create the stateless session class.
3) Get the javabean associated with the series of pages (session scope)
4) set the timestamp in the bean.
5) set the timestamp in the session.
6) do session logic.
7) check to see if the session timestamp and bean timestamp are the same.
8) if so, set the bean reference to the session return results
9) if not, ignore everything else...most likely the connection was lost
10) return jsp page
So in code it might look something like:
{
SomeSession ss = new SomeSession();
SomeBean bean = getBean(); // gets the javabean used by jsp page
Date date = new Date();
ss.setDate(date);
bean.setDate(date);
ss.doLogic();
if(checkDate( ss.getDate(), bean.getDate()) )
{
bean.setResults( ss.listAllResults() )
}
}
Is that good enough? You said something about a race condition. I recall
reading about this in my threading book, but I never was quite clear on it.
My assumption is that it would be possible for two thread/requests to
interrupt one another, thus in the middle of one thread checking the date,
another one could be altering it, or something like that.
Here is why I don't think this would ever happen. First, because each bean
is tied to an HttpSession, on a per-client basis, it would be almost
impossible for a client to submit to the same method in the same action
class at the same time..much less at least seconds apart. It is possible
that the two sessions do different amounts of work..such as one searching
for everything, and one searching for a few items..with both ending up
finishing at the same time. In this case..what to do?
There is one other thing to think about though. By actually fixing this
problem, we introduce another one. By allowing a user to hit STOP on the
browser and submit the form again, each request (at least in our case) will
pull a connection from the connection pool. If you have one user that
submits, stops, submits, stops, etc..and possibly several sessions (not
http..but logic session classes) running on the server for just a single
user..its very possible we will run out of connections in the connectin pool
(our own home brewn class right now). We did add some code that will open
new connections, but until we move to EJB and have the container manage all
of this, it can get quite bad if too many requests from one user keep going.
Ofcourse, at some point the session/logic class thread will be done and the
connection will get returned.
However, my thinking is..a J2EE web app is like an application. The user
shouldn't be prevented from stopping a form right after its submitted..maybe
they see something they forgot, or some wrong info. If it was a desktop
application..they could stop it, change, and restart the transaction (unless
its using RMI or CORBA or something to talk to a logic tier of servers). So,
I think as a web-application, they should be able to do this too. If this
means we should have 1000 connections in the pool (hopefully not), then so
be it..but the end user should never be burdened because we simply only
allow them to do one transaction at a time. We did however allow them to do
one transactio per module on our site..meaning, if they were to send a fax,
and check for an invoice, each one is a separate module..so they could get
away with doing each one of those at the same time.
Anyways..I look forward to what you have to say about my understanding of
what you said in the first email reply, and see if I am on target with
implementing this.
Thanks again.
On Wed, 15 Nov 2000, Duffey, Kevin wrote:
Thanks for the reply..
Your idea has some merit..the only problem is, we have so many different
searches and profile updates that could be happening..I would
need to keep
track of each of those separately.
Here is what I had in mind if there isn't any way to detect
ahead of time
that a connection to the browser was terminted.
snipped
I think your proposed solution seems kinda kludgy (either that, or I'm a
bit slow and don't fully understand it...) also as you said it only tracks
two references, and can be foiled by starting 2 long running searches,
aborting them, then doing a quick third one.
You don't need to keep track of each request, you just need to provide
very basic tagging of results so they can be verified against requests.
A slight variant: Instead of passing in the timestamp have the bean return
one as part of the result, which you could then sanity check to ensure
that the timestamp in the session is before the time the search bean
thinks it started. If you get a mismatch, then discard the results as
they're stale.
This does leave a race condition, where the critical section is in between
placing the timestamp in the session and the search bean creating its own
RE: Client hits STOP button..is there a way to detect this before sending a response?
Thats a good approach to take for things like a "list" of items, such as a search engine or a list of rows from a table. But what about when your building up a single transaction, and you need to keep the state of several pages across requests? While there is even less of a chance of what I am asking about happening in that case..it could happen. My worse fear is someone doing a DOS (Denial Of Service) on our site..imagine 1000 virtual users, and possibly each having the same cookie passed in so the server sees it as a single session. You would think though..since when trying to return a response the application server can throw an exception..there would be some way of checking if the connection still exists before sending the response back. That would solve this problem. :) I did think about using request scope..I just wasn't sure how I could maintain the other pages info across requests without sending large amounts of data as part of the query string..and I don't want to use hidden form fields. Quick answer - i dont know how to do an 'early detection' of the user pressing the stop button. I dont think its possibly - at least I dont think there is a non-super-difficult way of doing it. I think you may need to do more than just put your results bean in the session when providing a means to return results to the user. For example, what happens if both requests occur successfully ie the user has 2 browser windows open and does 2 successful searches). Seems as though whatever search finished first will have its results bean overwritten. In our project we almost exclusively use the request scope to put our beans in. When the user clicks the 'get me more button' we pass extra parameters that tell the server to get the next X rows. eg user clicks 'find' - get me the first X rows where user clicks 'more' - get me the first X rows where primary key is the primary key of the last row returned in the previous search. Basically then each search is independent of the last and you dont have to worry about cleaning up session beans, overwriting session beans etc. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Duffey, Kevin Sent: Thursday, 16 November 2000 8:42 AM To: Orion-Interest Subject: Client hits STOP button..is there a way to detect this before sending a response? Hi, I have a need to find out if the connection back to the browser from a servlet is still good or not, before an attempt to send the response occurs. Is this possible? I know when I do a response.sendRedirect() or requestDispatcher().forward() Orion will throw an exception if the connection to the browser (or client for that matter) has been terminated. The problem is..I want to check for this before an attempt is made, so that incase the connection is lost, I don't populate the javabean. I'll give a reason why this is necessary (and very helpful). I have my code organized into JSP pages, ControllerServlet/Action classs, JavaBeans and Session classes. Session classes are STATELESS classes, so that I can get ready to move to EJB when I get time. Each time a request is submitted, it goes to an action class method to be handled. The action class instantiates a new session class (I am not bothering with a pooled setup for session classes at this point as EJB will do this for me when I move to it). The session class performs some logic..usually database acitivty of some sort. The action class is then given a result (usually a Vector of some sort of objects). The action class then sets a bean variable to point to the vector of results. The bean is stateful and is session scope (HttpSession). At the end of the action, the response is forwarded to a JSP page. That page then uses the bean and its reference to results to display them. So here is the problem. If a user submits a form (say..to search for all clients) and lets say that search will take two minutes. 10 seconds later, the client sees he/she made a mistake on what they were searching for. As if often the case..they hit STOP on the browser, change their mistake and submit the form again. On the server..there are now two threads running..because the first one hasn't completed yet (assuming the user submitted the form the 2nd time fairly quickly). The 2nd request is quick..it populates the javabean reference to a Vector of objects say in 20 seconds. The response is sent back and the user sees a list of say 20 items. Now, while they are looking over this list, the 1st request they sent is still going on. At some point it too populates the SAME javabean with its results, which are now different than what the client is actually looking at on the page. The action tries to return its response but it finds its connection was terminated. It throws an exception (which I catch), and voila..the client sees nothing. Where the problem lies though..is when the first request
RE: Client hits STOP button..is there a way to detect this before sending a response?
On Wed, 15 Nov 2000, Kevin Duffey wrote:
So in code it might look something like:
{
SomeSession ss = new SomeSession();
SomeBean bean = getBean(); // gets the javabean used by jsp page
Date date = new Date();
ss.setDate(date);
bean.setDate(date);
ss.doLogic();
if(checkDate( ss.getDate(), bean.getDate()) )
{
bean.setResults( ss.listAllResults() )
}
}
Is that good enough?
Yep, except I'd say use new Long(System.currentTimeMillis()) instead of
new Date(). You don't need any date functionality, and Date objects are
notoriously heavy to create. Longs are more efficient in every way
compared to Dates.
You said something about a race condition. I recall
reading about this in my threading book, but I never was quite clear on it.
My assumption is that it would be possible for two thread/requests to
interrupt one another, thus in the middle of one thread checking the date,
another one could be altering it, or something like that.
Imagine this scenario:
Client request comes in on thread A
Servlet gets session (in thread A)
Servlet creates timestamp (thread A)
User hits stop, then does another query (assume it takes 0 time)
Client refresh request comes in on thread B
Servlet get session (in thread B)
Servlet creates timestamp, puts it in session (thread B)
Servlet puts timestamp in session (thread A)
Because of the way threading works, you're not guaranteed that they
execute in any given order. In the scenario above, if you don't
synchronise, the 'later' value might get clobbered with an incorrect
earlier one. Granted, this is VERY unlikely, and will probably happen one
in a million times, but the potential exists nevertheless.
Regarding your connection issues, I'd say look into your transactions! Two
minutes is an awfully long time. Also you should be closing them after
every transaction anyways. It doesn't really matter if the final
presentation layer gets to the client or not, when the transaction is
complete, the connection gets closed (in a finally block).
Hani
RE: Client hits STOP button..is there a way to detect this before sending a response?
How about you have one hidden form field which is a unique key that identifies the bean that should be used Basically a user's session would have some sort of hashtable in it containing a number of beans keyed by your hidden form field? Then you dont have to send heaps of data around when doing multipage transactions - just your 'transaction key' in the hidden form field. I guess these beans in the hastable would somehow get garbage collected after some interval. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kevin Duffey Sent: Thursday, 16 November 2000 3:01 PM To: Orion-Interest Subject: RE: Client hits STOP button..is there a way to detect this before sending a response? Thats a good approach to take for things like a "list" of items, such as a search engine or a list of rows from a table. But what about when your building up a single transaction, and you need to keep the state of several pages across requests? While there is even less of a chance of what I am asking about happening in that case..it could happen. My worse fear is someone doing a DOS (Denial Of Service) on our site..imagine 1000 virtual users, and possibly each having the same cookie passed in so the server sees it as a single session. You would think though..since when trying to return a response the application server can throw an exception..there would be some way of checking if the connection still exists before sending the response back. That would solve this problem. :) I did think about using request scope..I just wasn't sure how I could maintain the other pages info across requests without sending large amounts of data as part of the query string..and I don't want to use hidden form fields. Quick answer - i dont know how to do an 'early detection' of the user pressing the stop button. I dont think its possibly - at least I dont think there is a non-super-difficult way of doing it. I think you may need to do more than just put your results bean in the session when providing a means to return results to the user. For example, what happens if both requests occur successfully ie the user has 2 browser windows open and does 2 successful searches). Seems as though whatever search finished first will have its results bean overwritten. In our project we almost exclusively use the request scope to put our beans in. When the user clicks the 'get me more button' we pass extra parameters that tell the server to get the next X rows. eg user clicks 'find' - get me the first X rows where user clicks 'more' - get me the first X rows where primary key is the primary key of the last row returned in the previous search. Basically then each search is independent of the last and you dont have to worry about cleaning up session beans, overwriting session beans etc. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Duffey, Kevin Sent: Thursday, 16 November 2000 8:42 AM To: Orion-Interest Subject: Client hits STOP button..is there a way to detect this before sending a response? Hi, I have a need to find out if the connection back to the browser from a servlet is still good or not, before an attempt to send the response occurs. Is this possible? I know when I do a response.sendRedirect() or requestDispatcher().forward() Orion will throw an exception if the connection to the browser (or client for that matter) has been terminated. The problem is..I want to check for this before an attempt is made, so that incase the connection is lost, I don't populate the javabean. I'll give a reason why this is necessary (and very helpful). I have my code organized into JSP pages, ControllerServlet/Action classs, JavaBeans and Session classes. Session classes are STATELESS classes, so that I can get ready to move to EJB when I get time. Each time a request is submitted, it goes to an action class method to be handled. The action class instantiates a new session class (I am not bothering with a pooled setup for session classes at this point as EJB will do this for me when I move to it). The session class performs some logic..usually database acitivty of some sort. The action class is then given a result (usually a Vector of some sort of objects). The action class then sets a bean variable to point to the vector of results. The bean is stateful and is session scope (HttpSession). At the end of the action, the response is forwarded to a JSP page. That page then uses the bean and its reference to results to display them. So here is the problem. If a user submits a form (say..to search for all clients) and lets say that search will take two minutes. 10 seconds later, the client sees he/she made a mistake on what they were searching for. As if often the case..they hit STOP on the browser, change their mistake and submit the form again. On the server..there are now two threads running..because the first
Re: ClassCastException servletproblem
- Original Message - From: Patrik Andersson To: Orion-Interest Sent: Wednesday, November 15, 2000 4:54 PM Subject: RE: ClassCastException servletproblem Use the Java Reflections utilities. Issue myObject.getClass().getName() on the object that you are trying to cast to something and print it out... the variable you call statement... is that a JDBC statement? If it is you should not cast it to whatever the jdbc driver vendor has implemented it as. I must cast it to be able to access driver specific function org.gjt.mm.mysql.Statement state = (org.gjt.mm.mysql.Statement)statement;long id = state.getLastInsertID(); ( to get the latest autoincrement id) -erik
