Dash Abhisek

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since Jul 20, 2008
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Recent posts by Dash Abhisek

Hi All,

I have an EAR deployed in WAS 6.1 server , while starting up the server in the console I get to see information related to cells and nodes ,as of now I am unable to comprehend the importance of those lines .Can anybody give me insight about nodes and cells in WAS and what are their significance.

Thanks,
Abhisek
12 years ago
Hi Jeanne,

Thanks a lot for the advice. I will let you know once I get back to code.I now feel basically this (circular dependency)is an error because the compiler is getting confused which project to compile first and which to compile second,am I right?
Hi Jeanne,

Thanks fo the reply actually I went for those settings because of the reason that I am not very sure of what basically a circular dependency is all about,for me if project A has project B checked in Project References and Project B has Project A checked in Project references then it is a circular dependency but in my case the situation is quite different.

Project A is dependent upon Project B,Poject C and Project D.

Project B and C are not dependent upon any project.

Project D depends again upon Project B and Project C

Does this situation qualify as a circular dependency.

Please suggest how to remove the dependency.

Thanks & Regards,
Abhisek
Hi All,

I am trying to migrate an ear from wsad 5.1 to rad 7.0 environment.I was getting a circular dependency because of which building of projects couldn't be carried out I circumvented the problem by changing the settings of RAD .But, as my migrated code will be eventually be running in some other instance of RAD this setting will not be of help .Does anyone has any idea how to get out of error due to circular dependency?


Thanks & Regards,
Abhisek
Hi All,

I am using axis2 1.4.1 version in my web service I wanted to know what are the possible reasons for _returnMessageContext to be set to null after the execution of the below code.





my services.xml is as follows:-



Thanks,
Abhisek
12 years ago
Hi All,

What is the significance of this entry in services.xml:-

<messageReceivers>
<messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-out" class="org.apache.axis2.rpc.receivers.RPCMessageReceiver"/>
</messageReceivers>

Thanks,
Abhisek
12 years ago

Hi All,

Am I right on these two points:-

1>Any object whose reference variable is accessible by any live thread (daemon or user) be it a weak, strong, soft reference type is not eligible to be gced.

2>After the first condition is applied the GC has a knowledge of the objects that it can take out of memory and from this lot of objects first gc will try to get rid of weak then soft then strong.

Please correct me if Iam wrong.

Thanks,
Abhisek
12 years ago
Hi All,

What is the use/importance of j2ee module dependency section present in IBM RAD 7.o v.?

Thanks,
Abhisek
Thanks for correcting me
12 years ago
Hi Henry,
Can you please simplify a bit I am new to this that is why I am unable to get most part of it I got byte code verifiers were there from the very begining from your reply but I am still have the following doubts:-
1>Why earlier versions of java were not type safe.

2>I have a concept [might be a misconcept also] that byte code verifier verifies the byte code which is loaded at run time with the byte code used while compile time to ensure same version of the class is loaded. Am I right?

3>If the bytecode were generated by the Java compiler, then the bytecode verifier is doing a job that is pretty useless. I didn't get this line

4>"And doing some complicated state checking thingy to make sure all possible paths are accounted for" please elabaorate a bit on "all possible paths are accounted for". What you mean by all possible paths.


Thanks for the help and sorry for the trouble . I really want to know this topic inside out.Please help.

12 years ago
Hi All,

As far as my understanding goes (related to classloaders) in earlier versions of java the programmer can load a different version of a class at run time which is different from the versions thay have used while compiling that is why java was not type safe but in new versions java has included byte code verifiers which disallows this and hence java is type safe. If I am right in saying so please give some insights on what all things are checked by the byte code verifier basically I want to know how the byte code verifier works and If I am wrong please rectify me.

Thanks in advance,
Abhisek
12 years ago
Hi Yousuff thanks for answering , it would be more helpful if you can describe the meaning in the context that I have mentioned and some examples of resource manager will help me in understanding.Thanks.

12 years ago
Hi All,

I have come across the resource manger term numerous time while going through java books.But, I am not fully confident of what it means

Can anyone explain to me what resource manager in java means.

For your reference I am quoting a part of a line from a java book which says "resource manager like database"

what all things can be categorized as a resource manager?

Please help.

Abhisek
12 years ago
No you don't need to write codes to configure application server and manage it . you manage it through the adminstrative console of your application server, but you need to write code to do jndi lookup .

The application server and database server are two different servers they can be in the same machine or can be in two different machines also.They are not part of the same server.