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spring (<a href="http://www.springframework.org" rel="ugc">http://www.springframework.org</a>) is often used alternative to EJB
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spring (http://www.springframework.org [http://www.springframework.org]) is often used alternative to EJB

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If you are looking for an alternative to Entity Beans you can use any of the OR mapping frameworks eg. Hibernate, Toplink, iBatis, OJB etc.
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If you are looking for an alternative to Entity Beans you can use any of the OR mapping frameworks eg. Hibernate, Toplink, iBatis, OJB etc.

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Yes, there are alternatives to EJB, but you'll find that it's best to go with a hybrid approach. For a web app, go with Struts, or better yet, JavaServer Faces. Your business logic can be regular Java objects. You can optionally use stateless session beans for your business logic. You should look at hibernate for your persistence. It is a good lightweight persistence framework. If you need messaging, MDBs are a good choice. 
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Yes, there are alternatives to EJB, but you'll find that it's best to go with a hybrid approach. For a web app, go with Struts, or better yet, JavaServer Faces. Your business logic can be regular Java objects. You can optionally use stateless session beans for your business logic. You should look at hibernate for your persistence. It is a good lightweight persistence framework. If you need messaging, MDBs are a good choice.

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There is no one alternative which provides you everything that different types of EJBs do. One alternative could act as an alternate for only one type of EJB (say session or entity or MDB) but not an alternative for all of them at once.
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There is no one alternative which provides you everything that different types of EJBs do. One alternative could act as an alternate for only one type of EJB (say session or entity or MDB) but not an alternative for all of them at once.

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Are there any alternatives to EJB in the Java world?
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Are there any alternatives to EJB in the Java world?

EJB Alternatives

Java Enterprise Edition (Java EE) is a specification defining a collection of Java-based server and client technologies and how they interoperate. Java EE specifies server and client architectures and uses profiles to define technology sets targeted at specific classes of applications. All Java EE profiles share a set of common features, such as naming and resource injection, packaging rules and security requirements.

Java EE

An application server is a software framework that provides both facilities to create applications and a server environment to run them. Most application server frameworks contain a comprehensive service layer model, acting as a set of components accessible to the software developer through an API defined by the platform itself. For Web applications, these components are usually performed in the same running environment as their web server(s), and their main job is to support the construction of dynamic pages. However, many application servers target much more than just Web page generation: they implement services like clustering, fail-over, and load-balancing.