到EJB3与否？(To EJB3 or not?)

 我有一个架构场景，我想讨论以获得您的意见。 
 
 我可以在这两者之间做出选择（这是对我施加的限制） 
 
 
 
 使用EJB3 + JPA - 没有Spring / Hibernate 
 
 
 POJO + JDBC - 再次没有Spring / Hibernate 
 
 
 我有一系列需要集成的Web应用程序（只有内部网）。 在数据库级别，将有3到4个oracle数据库（每个数据库大约40到50个表）。 对于某些查询，某些应用程序可能与多个数据库交互。 并发用户数量将小于100.每个应用程序的用户/受众数量范围为10到6000（最大）。 
 
 所有应用程序都将部署在一台服务器上，数据库和服务器很可能位于同一台机器上。 
 
 大多数用例将基于CRUD（一些可以为ORM提供良好的域模型，而另一些可能不提供），具有一些业务流程，自动化作业等。未来可能需要与SAP集成以用于某些应用程序。 
 
 您是否认为在这种情况下EJB3会使应用程序更具可扩展性或仅增加复杂性？ 如果我使用POJO进行设计，那么这个应用程序我不想在没有充分理由的情况下增加复杂性。 我试图游说Spring和Hibernate但没有成功。 
 
 如果您需要更多详细信息，请与我们联系 
 
 编辑：我忘了提到应用程序服务器。 这是WAS 7。 

I have an architecture scenario and I would like to discuss to get your opinion. 
 
I can choose between these two (this is a constraint imposed on me)
 
 
 
Use EJB3+JPA - no Spring/Hibernate
 
 
POJO + JDBC - again no Spring/Hibernate
 
 
I have series of web applications (only intranet) that all need to be integrated. At database level, there will be 3 to 4 oracle databases (and about 40 to 50 tables per database). Some applications may interact with more than one database for some queries. Number of concurrent user(s) will be less than 100. User/audience per application will range from 10 to 6000 (max).
 
All applications will be deployed on one server, and it's very likely that database and server could be on the same machine.
 
Most of the use cases will be CRUD based (some can offer a good domain model for an ORM while others may not), with some business process, automated jobs etc There may be a future need to integrate with SAP for some applications.
 
Do you think EJB3 in this case will make the application more scalable or just add complexity? If I design with POJO, will an application of this I don't want to add complexity for no good reason. I tried to lobby for Spring and Hibernate but no success.
 
let me know if you need more details.
 
EDIT: I forgot to mention the application server. it's WAS 7.

原文：https://stackoverflow.com/questions/1105020