ejb-2.x

Are there any EJB migration tools available for migrating EJB 2.1 toEJB 3.x

由 我怕爱的太早我们不能终老 提交于 2020-01-03 13:36:41
问题 May be the best way is doing it manually. But in a large project you need some tool to assist you. It was the idea that led me to search a tool. Are there any EJB migration tools available for migrating EJB 2.0 to 3.x. 回答1: It was only under development for a short time, but for a period we did have an eclipse plugin that would read in ejb-jar.xml files and then update the source and insert the annotations. It's been used a handful of times by the person who wrote it (Jonathan Gallimore) and

How does the MDB instance picked from a particular container pool?

由 佐手、 提交于 2019-12-24 23:42:58
问题 I'm wondering how the MDB instance is re-used from a particular container pool.In standardjboss.xml, the standard MDB container pool is configured. In jboss-container.xml ther are two MDB specific container-pool configuration that extends the standard MDB configuration. There is no where in the source I could see certain MDBs are associated with a particular pool. I want to know how the few MDB instances are re-used from a particual pool and other MDB instance is used from an other MDB pool.

Can EJB2 and EJB3 coexists in one application?

由 若如初见. 提交于 2019-12-18 12:30:49
问题 does anybody know if it is possible to iteratively replace EJB2.1 beans with EJB3 beans in Java EE application? That is: at one time remove one 2.1 bean from the code and add corresponding EJB3 bean that implements the same behavior without touching the rest of the code (+ be able to inject the legacy EJBs via annotations in the new EJB3). I am not expert at EJB specs (and I have experience only with EJB3), but to me EJB is a simply component with given business interface that is managed by

Connection handling in EJB2 session beans

由 十年热恋 提交于 2019-12-12 03:20:04
问题 I recently started maintaining an old EJB2 application running on OC4J. That includes EJB doclet and other horrible horrible things. Currently, each method creates a ConnectionFactory that queries JNDI for a Datasource , which then creates a connection. This leads to a lot of boiler plate code. My question now is: is it safe to do this only once per stateless session bean, and reuse the same connection? ejbCreate() would get the connection from JNDI, and then close it in ejbRemove() . Would

How to handle Container Managed,Auto Acknowledge, Transaction Not Supported, MDB exception for message redelivery

由 不羁的心 提交于 2019-12-12 01:51:27
问题 I got a MDB - EJB 2.1, WebSphere 7 version Container Managed and Auto Acknowledged Transactions marked as Not Supported Now how do I handle exceptions in a way that the message will be preserved during exception and redelivered later? I tried to throw runtime exception from the catch block inside my MDB onMessage method. But that seems to stop the MDB Listener which is unexpected. I cannot call context.setRollBackOnly() as there is no transaction. 回答1: RuntimeException should be fine. Check

EJB2.x container managed relationship

由 一世执手 提交于 2019-12-11 18:03:45
问题 I am a total novice to EJB technologies, so recently I started learning EJB3.0, when reading through books/online resources, I found lot of references and comparisons to EJB2.0 and how EJB3.0 simplifies things by requiring developer to create fever components. I left my reading of EJB3.0 and started reading EJB2.0. I started with book "Enterprise Java Beans by Richard Monson-Haefel III Edition", its pretty old edition (2000) but is very comprehensive. I understood the things pretty well until

How to get the Client ip address in an EJB3 Interceptor?

由 陌路散爱 提交于 2019-12-08 11:01:55
问题 Often it's useful for Auditing or security purposes to get the IP Address of the client making a remote EJB3 Call. This information is not readily available in the Context of an EJB3 Bean. Here's a hack to be able to achieve this in JBoss 4.x. 回答1: There is an answer on this page https://community.jboss.org/wiki/HowToGetTheClientIpAddressInAnEJB3Interceptor?_sscc=t Basically it uses the thread name to obtain the ip address as each call is launched in its own thread... 来源： https:/

EJB specifications and Java versions - backwards compatibility

由 与世无争的帅哥 提交于 2019-12-05 01:42:42
问题 This is my understanding of relationship between the EJB spec and Java versions EJB 2.0 was part of J2EE 1.3 platform, which was on top J2SE 1.3 or JDK 1.3.x EJB 2.1 was part of J2EE 1.4 platform, which was on top of J2SE 1.4 or JDK 1.4.x The EJB 2.1 specification requires backward compatibility for EJB 2.0, so containers supporting EJB 2.1 and running in JDK 1.4.x will be able to run EJB 2.0 beans as well. EJB 3.0 is part of Java EE 5 platform, which required Java SE 5 (JDK 5) for

Difference between Entity bean and Entity class?

由 时光毁灭记忆、已成空白 提交于 2019-12-02 07:25:50
问题 What are the differences between entity beans which are in the EJB 2.0 specification and entity classes which in the 3.0 specification? 回答1: In EJB 2, entity was a bean meaning that it had to live in a container and need to be managed (similar to other beans, say stateful, stateless, message driven beans). However in EBJ 3.x, entity is a POJO class - meaning that it can live outside container also.. plain java application can make use of entities as ORM layer with any providers supporting it.

Difference between Entity bean and Entity class?

由 此生再无相见时 提交于 2019-12-02 01:36:50
What are the differences between entity beans which are in the EJB 2.0 specification and entity classes which in the 3.0 specification? Santosh Kumar Arjunan In EJB 2, entity was a bean meaning that it had to live in a container and need to be managed (similar to other beans, say stateful, stateless, message driven beans). However in EBJ 3.x, entity is a POJO class - meaning that it can live outside container also.. plain java application can make use of entities as ORM layer with any providers supporting it.. 来源： https://stackoverflow.com/questions/37524680/difference-between-entity-bean-and
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