This means that they can be created by using the new constructor: new MyEntity ; Also entities are managed by an EntityManager: entitymanager. Metadata annotations is new. For example, to define a stateless session bean, the Stateless annotation is declared on the bean class. Business Interceptors — The new business interceptors allow the developer to intercept each business method of the bean.
The parameters and the returned values can be changed. For example, an interceptor can be used to determine the time that a method takes to execute. Lifecycle Interceptors In addition to business interceptors, the EJB2 callbacks such as the ejbActivate method are now defined using annotation. Dependency Injection Dependency injection makes it possible to request that the container inject resources, instead of trying to get them.
Learn More. Comparison between ejb2. First Prev Next Last. Showing Answers 1 - 11 of 11 Answers. Hi All, 1 EJB2. Thanks and regards, Seshadri. Software Engineer. Dutta Sr. Rakesh Apr 20th, Nitin Apr 26th, Naga May 24th, Hi The main differences are a EJB2. Give your answer: If you think the above answer is not correct, Please select a reason and add your answer below.
Open Questions Answered. Latest News. It looks like you are using an AD Blocker! Disable Ad Blocker Learn More. Based on the documentation of PostConstruct etc. I can no longer throw any checked Exceptions. How can i handle this if i cannot migrate the code using the EJB right now. No only the name is arbitrary, you can have several PostConstruct methods in one EJB - however the order of invocation is unspecified, so be careful and try to stick with one method.
If the client was explicitly handling CreateException thrown by ejbCreate and you want to use EJB 3, then you must be using a stateful session bean. Exceptions from ejbCreate from stateless session beans are not propagated to clients, and entity beans do not support annotations in EJB 3. In that case, you want the Init annotation:.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What is the EJB 3. Asked 10 years ago. Active 10 years ago. Viewed 12k times. Edit2: The frontend specifically handles CreateException which unfortunately is checked. Improve this question. Stefan Stefan 3 3 gold badges 13 13 silver badges 28 28 bronze badges.
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