讲授Java J2SE和J2EE[教学]

[programmer]

本人在中国大陆和加拿大均具有丰富的编程语言的工作和教学经验。

有意学习Java J2SE(1.3, 1.4)，J2EE(如JSP, Servlet, EJB, JDBC, JMS, XML, SOAP等），请联系：programming_tutorca@yahoo.ca

当面讲解并提供与您要求相符合的Notes和Samples，收费合理。

方式灵活：
（1）可根据您的需要，分单元系统讲解；
（2）针对您学习作业中遇到的问题，专门辅导。

 

[guest]

Well, let me ask you a question first, in message driven bean,
can you guarantee to receive message with right order? If you can, how?

 

[programmer]

It depends on what kind of MDB you want. There are two ways to send a message with JMS, i.e. Queue and Topic. When Queue is employed, it is possible to implement what you want.
Of course, if you want to know the detail answer, please pay me.

 

[guest]

Unfortunately, you give me the wrong answer.
1. We can get messages with right order from both Queue and Topic, if w don't use
multiple sessions in JMS;
2. In EJB, container doesn't guarantee MDB's message order. You can find this in EJB2.0
specification.

Good luck for your tutor career.

 

[programmer]

It is really unfortunate that you are wrong at all.

1. Under any condition, nobody guarantees you can get messages with right order with both Queue and Topic, because it depends on how the vendor implements the EJB container and JMS server. You will get different results with different vendor’s production.

2. EJB2.0 specification just defines what the vendor should do. Especially for JMS, the vendor decides how to do. The EJB containers from some vendors don’t support MDB’s message order, but others do it. It is not easy to handle EJB 2.0 and JMS if just to know about some specification.

3. Welcome you to make an appointment with me if you are really interested in it.

 

[guest]

Why mention money? how about make fiends through exchange?

Used to be C++ programmer, now interested in Java. just passed SCJP and studying more on Java and OOAD

 

[guest]

My computer is windowsxp, I want to download a softwire so that I can write chinese, would you like to tell me where i can find this kind of softwire?
Thanks.

 

[guest]

"The EJB containers from some vendors don’t support MDB’s message order, but others do it."
Could yuu please tell me which container/servers support MDB's order?

 

[guest]

To Riven and other supers (administrators):
I recommendate we have a special section to post IT related messages, including
1) for beginners and general public, topics such as how to buy or assemble a PC, how to install Chinese, etc.
2) for students and professionals, programming language tips, networking, web design, problems and discussions.
There are a lot of such topics posted before, including the current posts, which are very useful to students and public general. Some questions were raised again and again. Can you collect all previous IT-related posts to the new section?

Thanks for consideration.

 

[guest]

Could you please sth about "Test Client"(whatever you know) when we develope an EJB?

 

[handler]

To programmer, what you said, doesn't make any sense. Why don't
you go to read JMS and EJB spec first? Do you want me post specs here?