RE: Concurrent calls to Session bean methods
I was also wondering about this. Of course since the webcontroller is not an
EJB it is allowed to use the otherwise banned synchronized keyword!
Guy.
-Original Message-
From: The elephantwalker [mailto:[EMAIL PROTECTED]]
Sent: 21 March 2002 04:48
To: Orion-Interest
Subject: RE: Concurrent calls to Session bean methods
John,
Here is the offending class, compliments of the Sun Blueprint team:
public class ShoppingClientControllerWebImpl implements
WebClientController
{
private ShoppingClientControllerLocal sccEjb;
private HttpSession session;
public ShoppingClientControllerWebImpl() {
}
// ... stuff...
//
// the important bit ...
public synchronized EventResponse handleEvent(Event ev)
throws EventException {
return sccEjb.processEvent(ev);
}
}
So you see that the webcontroller is the _only_ access to the
sfsb. And the
only call is synchronized, thus preventing cocurrent calls to
the stateful
session bean.
regards,
the elephantwalker
www.elephantwalker.com
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of
[EMAIL PROTECTED]
Sent: Wednesday, March 20, 2002 12:05 PM
To: Orion-Interest
Subject: RE: Concurrent calls to Session bean methods
I haven't seen the history on this issue, but it interests
me. I had a
quick look at the ShoppingClientControllerEJB class that is
given as an
example by Sun in the Session Facade design pattern, but
couldn't see where
they are synchronizing calls. Can you provide some more clues?
Thanks,
John H.
The elephantwalker
[EMAIL PROTECTED] To:
[EMAIL PROTECTED]
Sent by: cc:
owner-orion-interest@orion Subject: RE:
Concurrent calls to Session bean methods
server.com
03/19/02 10:31 PM
Please respond to
Orion-Interest
Vani,
You can use the petstore trick. Use a facade class which
sychronizes each
call to your session bean. That should do the trick.
This is a _famous_ problem with session beans.
regards,
the elephantwalker
www.elephantwalker.com
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Vani H.S.
Sent: Wednesday, March 20, 2002 12:04 AM
To: Orion-Interest
Subject: Concurrent calls to Session bean methods
Hello All,
I have been trying to deploy an application consisting of
session beans
and mdbs onto orion1.5.4.
But I seem to run into deadlocks, because my session bean
gets called
concurrently. Please can anybody can tell me if there is a
setting to allow
concurrent calls so that, when a session bean method is
called at one time,
the EJB container blocks the concurrent method call and allows it to
proceed
when the previous call has completed?
If not, how should this problem of concurrent calls be
handled in orion?
Please help.
Thanks,
Vani
The allow-concurrent-calls element specifies whether a
stateful session
bean
instance allows concurrent method calls. By default,
allows-concurrent-calls
is false. However, when this value is set to true, the EJB
container blocks
the concurrent method call and allows it to proceed when the
previous call
has completed.
_
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RE: Soap with Axis ?
Well I've been using Axis for a while now. The namespace issue can be resolved by using the follow: call.setProperty(Call.NAMESPACE, urn:TheNameSpace); An entire SOAP call would then look something like following: Service service = new Service(); Call call= (Call) service.createCall(); call.setTargetEndpointAddress(http://endpoint;); call.setOperationName(MyOperation); call.setProperty(Call.NAMESPACE, namespace); Object result = call.invoke(params); I've needed to specify the namespace when calling an Apache SOAP server from an Apache Axis client. Guy. -Original Message- From: Eddie Post [mailto:[EMAIL PROTECTED]] Sent: 11 March 2002 10:39 To: Orion-Interest Cc: [EMAIL PROTECTED] Subject: RE: Soap with Axis ? Hellu, Thanks for your reaction. I see two examples of interest on the Atlassian site: - One with SOAP and EJB. I am just starting to use SOAP and the example is for Apache Soap and not with Apache Axis. Axis needs some other values and I don't know how what/how to change the SOAP values in the example. - Axis with Orion integration. In the example you have a part called Test, which is the most interesting. The test section goes very fast, for example, there is a deployment with a deploy.xml but no deploy.xml is given. If I take the Calculator example of Axis itself I get the error (with Calculator.class in the Axis/WEB-INF/classes dir): --- C:\Ed_soft\Develop\Manual\xml-axis-alpha3\samples\edjava -cp .;./a xis.jar;./log4j-core.jar;./jaxp.jar;./crimson.jar org.apache.axis.c lient.AdminClient -lhttp://localhost:9000/axis/servlet/AxisServlet deploy.wsdd Processing file deploy.wsdd AxisFault faultCode: ns1:Server.NoService faultString: The AXIS engine could not find a target service to i nvoke! targetService is http://xml.apache.org/axis/wsdd/ faultActor: null faultDetail: exceptionName: org.apache.axis.AxisFault --- If I try the above with for example Tomcat I do get the error: --- C:\Ed_soft\Develop\Manual\xml-axis-alpha3\samples\edjava -cp .;./a xis.jar;./log4j-core.jar;./jaxp.jar;./crimson.jar org.apache.axis.c lient.AdminClient -lhttp://localhost:8080/axis/servlet/AxisServlet deploy.wsdd Processing file deploy.wsdd AxisFault faultCode: http://xml.apache.org/axis/:Server.userException faultString: org.xml.sax.SAXException: Bad envelope namespace: faultActor: null faultDetail: exceptionName: org.xml.sax.SAXException stackTrace: org.xml.sax.SAXException: Bad envelope namespac e: --- Please any help on what the above errors mean ? Eddie :( From: DeVincentiis Giustino [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: RE: Soap with Axis ? Date: Mon, 11 Mar 2002 08:50:31 +0100 Hello, Could you please let me know what is your problem with the example on Atlassian KB? Thank you, Giustino De Vincentiis -Original Message- From: Eddie [mailto:[EMAIL PROTECTED]] Sent: Saturday, March 09, 2002 8:05 PM To: Orion-Interest Subject: Soap with Axis ? Hellu, Does anyone has an example descriptor of a web service to connect a client to a EJB through SOAP (Axis of Apache) ? Most os the examples I find are not based on Ejb connections and on the Atlassian site I saw a example for Apache Soap but I can't get it to work with Orion. Eddie _ Chat with friends online, try MSN Messenger: http://messenger.msn.com DISCLAIMER - The preceding e-mail message (including any attachments) contains information that may be confidential, may be protected by the attorney-client or other applicable privileges, or may constitute non-public information. It is intended to be conveyed only to the designated recipient(s) named above. If you are not an intended recipient of this message, or have otherwise received it in error, please notify the sender by replying to this message and then delete all copies of it from your computer system. Any use, dissemination, distribution, or reproduction of this message by unintended recipients is not authorized and may be unlawful. The contents of this communication do not necessarily represent the views of this company.
RE: modeling tool
I've used www.magicdraw.comin the past, not quite as cheap as metamill but I thought it was nice. -Original Message-From: Chandra Kuchibhotla [mailto:[EMAIL PROTECTED]]Sent: 27 February 2002 01:20To: Orion-InterestSubject: RE: modeling tool Why don't you look at metamill (www.metamill.com)? Its affordable and it has very nice features! -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of VinÃcius de Faria SilvaSent: Tuesday, February 26, 2002 12:29 PMTo: Orion-InterestSubject: modeling tool Hey guys, i'd like to hear your comments about this situation. My team has a well defined development process,for developing j2ee web apps. This is a lightweight process based on uml diagrams. Our Java IDE is JDeveloper9i and we are happy about it. We need now to get a uml graphical modeling tool, which support the analisys/design phases of the development process. JDeveloper9i doesn't support all the uml diagrams we need. At the same time we don't want to spend a lot of money with a tool that will bring much more than we need(process development, java IDE and so on). I'm wondering to know what you guys think about it... thanks in advance, VinÃcius
But which version
Hi all, now that we have a new versions of Orion, 1.5.4, it is all more confusing which version we should be using. It would seem that the official line is to use 1.5.2 but that is way old. I still have a short while before I need to deploy my app but would like to de doing this with the 'right' version of Orion. Anyone have any ideas on this? Thanks, Guy.
RE: Wow. It seems that 1.5.4 is released!!!
Another question from me as I'm a bit late on the Orion scene, I have only been using it a couple of months. Does this mean that 1.5.3 has been abandoned. It also seems like it has been an awfully long time since they last released a stable version. Guy Djemal. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 15 February 2002 16:40 To: Orion-Interest Subject: RE: Wow. It seems that 1.5.4 is released!!! Great to see that a new version is ready of this great application server!!! Just a question for the Orion guys. Does this version support the complete J2EE 1.3 standard (including all EJB2.0)?? I am very interested because this is a key issue for one of my projects! Thanks on any info. Erwin Teseling See subj.
RE: Wow. It seems that 1.5.4 is released!!!
Well regardless 1.5.3 was called an experimental release and is no longer available to download. -Original Message- From: Ray Harrison [mailto:[EMAIL PROTECTED]] Sent: 15 February 2002 11:29 To: Orion-Interest Subject: RE: Wow. It seems that 1.5.4 is released!!! 1.5.3 was just the previous version and now they have moved on to 1.5.4 - with SIGNIFICANT updates. 1.5.3 was just a bug-fix release to the 1.5.2 stable release. 1.5.4 is (to me) quite a bit of a change from any previous version and will be the starting point for future stable releases. Once 1.5.4 is in its current mode for a while and if there are no major bugs, it will likely become a so-called stable release. --- Djemal, Guy (TWIi London) [EMAIL PROTECTED] wrote: Another question from me as I'm a bit late on the Orion scene, I have only been using it a couple of months. Does this mean that 1.5.3 has been abandoned. It also seems like it has been an awfully long time since they last released a stable version. Guy Djemal. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 15 February 2002 16:40 To: Orion-Interest Subject: RE: Wow. It seems that 1.5.4 is released!!! Great to see that a new version is ready of this great application server!!! Just a question for the Orion guys. Does this version support the complete J2EE 1.3 standard (including all EJB2.0)?? I am very interested because this is a key issue for one of my projects! Thanks on any info. Erwin Teseling See subj. __ Do You Yahoo!? Got something to say? Say it better with Yahoo! Video Mail http://mail.yahoo.com
MDB Orion 1.5.3
Hi all, I'm trying to use Queue based MDB with Orion 1.5.3. I've got to the point of deploying my bean but when I post something to the queue my MDB never get the message. I also notice that Orion seems to load the MDB class twice, it doesn't do that with any of my other beans! I believe I've set up my jms.xml correctly so I am wondering if any of you have any words of wisdom. Thanks, Guy.
RE: Integrating LOG4J into Orion...
Well I've followed all these instructions but have fallen over on a couple of counts: 1- Using a BasicConfigurator, which is initialised within a singleton, nothing is displayed, it's as if log4j has gobbled up all my messages :-( 2- If I try and use a DOMConfigurator it can't find the config file. Help anyone? Thanks, Guy :-( -Original Message- From: Scott Farquhar [mailto:[EMAIL PROTECTED]] Sent: 22 January 2002 01:28 To: Orion-Interest Subject: Re: Integrating LOG4J into Orion... Further to what Mike has said, I'll just give you a little update on the status of the Log4j 1.2 release. The 1.2 code base is largely different to the 1.1 base, and has features that when finished, will be useful for using in application servers, and make it a lot easier to configure. The features that I talk about are: - Different LogManagers. This will allow Orion to provide a logmanager *per application*, or if it can't find one, use the default logmanager. This means that you will be able to specify a configuration file per application, and not have to manually configure it. - Configuration files will be reloaded The watchers code is being rewritten. When it is finished, you will most likely have code that allows you to configure how often the config files are reloaded (and stop / restart the watcher thread). So what does this mean for you, if you are using log4j in your application now? - Use the 1.2 code. Although in alpha, it is quite stable. - If you have specific requirements (apart from the above two), suggest them on the log4j email list, or email me with your suggestions. Lastly - congratulations on using log4j. Logging is very important in enterprise applications! Cheers, Scott -- Scott Farquhar :: [EMAIL PROTECTED] Atlassian :: http://www.atlassian.com Supporting YOUR J2EE World Mike Cannon-Brookes wrote: This is one possible scenario - but as Jeff says it's server specific logging (not application specific) - which can often be non-optimal. We have a document coming out on this (check http://kb.atlassian.com) soon, but until it's finished here's what we usually do: - use the latest log4j from CVS (which has the capability to define which is the default log loading class - there is now one which loads log4j.xml from classpath, and watches it) - I believe it's done via system properties (selecting automated file loader and watch time) - add a library path=config / to your orion-application.xml for each application - add config/log4j.xml to your application You're done! this means you now have : - automatic log configuration (no more need for servlet listeners, application clients or servlets to configure logging!) - dynamic logging (you can just change the log4j.xml file and your changes are picked up without redeployment) - logging _per application_ (rather than per server) As I said, see if the above directions work for you and please email me off list if they don't (so we can adjust the document in progress). Watch this space for the doco coming soon ;) Hope this helps! Mike Mike Cannon-Brookes [EMAIL PROTECTED] Atlassian :: www.atlassian.com Supporting YOUR world Now just configure log4j.xml On 19/1/02 4:40 AM, Jeff Schnitzer ([EMAIL PROTECTED]) penned the words: I put the log4j.jar in orion's lib directory, and use -Dlog4j.configuration=file:path/to/log4j.properties to initialize log4j. I'm pretty happy with this approach. I control logging on a server-wide basis, so I can use the same ear file for both testing and deployment. Jeff Schnitzer [EMAIL PROTECTED] -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Friday, January 18, 2002 5:35 PM To: Orion-Interest Subject: FW: Integrating LOG4J into Orion... One more time, the last one did not show up -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 17, 2002 11:09 AM To: Orion-Interest Subject: Integrating LOG4J into Orion... I have a full EJB/JSP application running with Orion. Is there a preferred method of initializing LOG4J in this situation? Looking at the LOG4J documentation, they mention using a startup servlet to do the initialization. I am concerned as to how this would work with the CLASSLOADER hierarchy. If I initialize my LOG4J at the servlet (WEB) layer, will the EJB's be able to see the initialized LOG4J or will they attempt to re-initialize due to the different classloader? Thanks. -AP_
RE: Multiply datasources for one application??
Hi, I've just subscribed to this mailing list so sorry if this message is sent out of sync. I was stuck on the earlier point made. I've specified my own orion-application.xml to point to a specified data-sources.xml, however when deploying the ear orion does not seem to be able to find it. I've put both file in the METAFILE folder of the ear. My orion-application.xml looks as follows: orion-application deployment-version=1.5.2 web-module id=nokia-web path=nokia-web.war / persistence path=persistence / library path=lib / log file path=application.log / /log data-sources path=data-sources.xml / /orion-application Thanks, Guy. - RE: Multiply datasources for one application?? * From: The elephantwalker * Subject: RE: Multiply datasources for one application?? * Date: Tue, 15 Jan 2002 16:08:40 -0800 Mike, You can use different data-sources by using a different location name for each data-source. You need to make sure that each data-source within your data-sources file has a distinct location name. You apps can use different data-sources.xml by including the data-sources.xml path in your orion-application.xml of your ear. This way you can have more than one ear, each with its own data-sources.xml. Regards, the elephantwalker www.elephantwalker.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, January 15, 2002 10:57 AM To: Orion-Interest Subject: Multiply datasources for one application?? Hi everyone, if there is anyone that can give me a hand I would really appreciate it. My Problem is that I have an application developed using orion and I works great but we are trying to set up multiply test environments using different database instances. My questions is can you set up one application with multiply datasources and if so how do you go about setting it up. We tried to set it up with different datasource declarations in one datasource but it always reads the last datasource declaration into the driver manager. Please help if you can, Thanks. Mike
