Eclipse Maven Weblogic hot code swap

I have a basic question about running a JEE application on Weblogic using maven in eclipse. I use OEPE (Oracle Enterprise pack for Eclipse) that we know comes with some plugins such as m2e and wtp. As far as I know this plugins read the pom file and based on them build the jar, war and ear files. What I do right now is like this: I check the build automatically option and let these plugins create my EAR file, then right click on the instance of weblogic server in Eclipse and add it to server using add/remove option and finally start the application server. This way when I change code in my classes they will be picked by application server and hot swap works. Another way to build the EAR file is using the m2e plugin: right click on the parent pom file and choose maven install then start the application server and use the wls:deploy in order to deploy the EAR file. (This time I don't add the ear file to the application server from within the Eclipse and eclipse also is not aware of that EAR file when I right click on the instance of my weblogic inside the IDE). As far as I've seen I can only add those artifacts to server which are built using the wtp plugin and not the artifacts that are built using maven command of m2e plugin. The problem with wtp and all these plugins (except for m2e which actually just runs mvn -install) is that they don't work flawlessly. Sometimes they don't build the artifacts correctly sometimes the jar files are obsolete and they don't get updated. Moreover when you use the jar file of one project in another maven project they get stuck with the jar file prior to your changes, while using the m2e they are built flawlessly. Now here is the real question: Which way is the correct one to have hot deploy? Am I missing something? Is building the ear file using m2e plugin and deploying using wls:deploy enough? If so how will hot swap happen by itself or should i use wls:redeploy each time? If m2e is enough then I assume that I should abandon wtp plugin (it does not know all the plugins of pom file and I should sometimes mark them as ignored in lifecycle management xml file of eclipse).
I'm sorry that the question is that long but I hope that I made the case clear and get some help!
Cheers.

I assume that by maven integration in eclipse you specifically mean the m2e plugin. Then what about wtp plugin? And by not using maven and managing the dependencies in eclipse: Do you really mean that I, myself should care about putting my jar files war file in my ear file and going back to the old fashioned library management? (If this is the case then it isn't worth it because working without maven is just wasting time and out of industry standards nowadays.) Or maybe I've not understood this sentence exactly :
but you will need to manage your projects dependencies in Eclipse, not via pom files.

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Hi Everyone,
I am using WebLogic 10 with Eclipse. Whenever i start the server in debug mode and make two three changes in the code... WHAM.... I get the Hot Code Replace error. Is there any way so that the server can keep up with the code changes. Publishing the app again takes approx 40 mins!

Almost always this is a limitation of the JRE/JDK you are using and really
nothing to do with Eclipse.
Try a different VM and see if you have better luck
HTH
Darins
"bobz" <[email protected]> wrote in message
news:75257188f239cb376da31e19b214d2d9$[email protected]..
> hi buddies,
>
> i am getting "hot code replace" problem whenever i change my
> java code and build the project and access the website without re-starting
> the server. so, finally i endup with re-starting the server whenever i
> change the code. this consumes a lot of time. is there any possibility to
> work without re-starting the server even after the code change.
>
> regards,
> satish.

Hot code replacement

How do I do hot code replacement in Eclipse? I tried to write another line while debugging the code, but I got the warning message about the obsolete methods in stack.

I didn't write a new method to replace a method.
Suppose that I have set a breakpoint at
System.out..println("hi"), debug it, and then change
the number 2 to 3 and save it, then I want this code
to work well. It did show a pop up dialog explaining
about obsolete methods.
What does it mean?
     public void testSomething() {
          System.out.println("hi");If you set a breakpoint here. This method was on stack and when you
did hot code replacement and this method "testSomething" becomes
obsolete method. And it will not execute the new modified statement.
To make the new replaced code to execute you should pop this
frame and continue. Or set a breakpoint at line before entering
this method and then do hot code replacement.
          System.out.println("2");
Thanks.

Hot code replacement for local application?

i got hot code replacement working during debugging a removet web application (servlet). however, it doesn't work if i debug a simple (local) application. is there something i forgot to setup? (i'm using Eclipse)

This is an eclipse specific question. It is up to Eclipse to do the code replacement.
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I debug my Java application with Eclipse (3.1). When I change my code during debugging, I get the following error message:
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Reason:
Hot code replace failed - Delete method not implemented
What does that mean and how can I fix this?

This means you changed a class while it was debugging an application and it could not update the class for the application while it was running.
The error suggests you may be running an older JVM, i.e. pre-1.4.2 but this error can occur with any JVM if the change is incompatible with the previous version of the class.
The hot replace often does not work for non trivial changes to code.

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There isn't much in a way of documentation that's explicit to WebLogic Server Tools, but a lot of Workshop 10.2 documentation applies. Basically, you will want to create Dynamic Web Projects to house your code. On the first page of Dynamic Web Project wizard, you will get a chance to define and target a server (WLS 8.1 in your case). That will configure your project classpath for WLS 8.1 and get everything else squared away.
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Websphere setting for Hot code replace

hi ,
these days i need to build my code everytime i make changes ...
previously it was working well ......
i went thru some changes in env .....as there were new addition of MDBs etc in my projects .....
i m using WSAD 5.1.2 .......
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REG : HOT CODE REPLACE FAILED

Hi,
I am able to build and deploy and it says deployment is successfull from IDE. But when i tried to write some new code into my application or debug it,I am getting the error message saying:
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Anybody has faced this problem?
Please let me know if you have faced this problem.
Regards,
Anu

Synched and Rebuild it .Created a new activity after reverting back the tasks done before.

Hot Code replace failed- VM inconsistent

When i am trying to deploy the application on WAS through NWDS, it is throwing Hot Code replace failed- VM inconsistent.
Please give your input.
thanks,

Hi,
> It ask me for SDM password, than it throws the error out.
I do not really understand why the SDM password should be checked for debugging...
(Double-)Check the WD-Debugging infos here: http://help.sap.com/saphelp_nw04/helpdata/en/cc/9cb34d9d11f74c98644df2b96b90f1/frameset.htm
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Detlev

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i face the following message and the code keep on retain to the old code.
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Hi Yzme,
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Shubham

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Hi
I am following this documentation http://download.oracle.com/docs/cd/E15919_01/wlp.1032/e14252/setup_dev_env.htm#i1013214
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Error 403--Forbidden using eclipse and weblogic

hi,
i am new here on j2ee
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import javax.servlet.http.HttpServletRequest;
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http://localhost:7001/SecondServlet/
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I do connect with router/modem
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<?xml version="1.0" encoding="UTF-8"?>
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<wls:context-root>SecondServlet</wls:context-root>
</wls:weblogic-web-app>
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this is just a start so please i need to solve this problem so that i can move ahead
thanks
Edited by: chitochez on Dec 18, 2008 5:45 AM

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