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Java > Learn Java > What are the advanced features of EJB3.1?
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What are the advanced features of EJB3.1?

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1. Support for direct use of EJBs in the servlet container, including simplified packaging options. The current thought is to allow EJBs in the WEB-INF/classes directory while allowing ejb-jar.xml to reside in the WEB-INF directory, just like the web.xml file. In a similar vein, you would be able to...
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1. Support for direct use of EJBs in the servlet container, including simplified packaging options. The current thought is to allow EJBs in the WEB-INF/classes directory while allowing ejb-jar.xml to reside in the WEB-INF directory, just like the web.xml file. In a similar vein, you would be able to place an EJB jar into the WEB-INF/lib directory. 2. EJB Timer Service enhancements to support cron-like scheduling, deployment-time timer creation, and Stateful Session Bean timed objects. 3. Support for stateful web services via Stateful Session Bean web service endpoints. read less
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Support for direct use of EJBs in the servlet container, including simplified packaging options. The current thought is to allow EJBs in the WEB-INF/classes directory while allowing ejb-jar.xml to reside in the WEB-INF directory, just like the web.xml file. In a similar vein, you would be able to place...
read more
Support for direct use of EJBs in the servlet container, including simplified packaging options. The current thought is to allow EJBs in the WEB-INF/classes directory while allowing ejb-jar.xml to reside in the WEB-INF directory, just like the web.xml file. In a similar vein, you would be able to place an EJB jar into the WEB-INF/lib directory. EJB Timer Service enhancements... more» read less
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5+ years of experience in computer science with c++ for class 11th and 12th , java, spring mvc, angular.js for MCA, BCA, 12th, B.tech. Working as Team leader in IT company

EJB Interfaces are Optional -- @Stateless or @Stateful. The Singleton Beans are Here-@Singleton. It’s Time for Timer Service Features-@Timeout, @Schedule Stripped Down EJB Packaging-no need to create a separate EJB jar module. Rather, EJBs can be directly dropped into the WEB-INF/classes...
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EJB Interfaces are Optional – @Stateless or @Stateful. The Singleton Beans are Here-@Singleton. It’s Time for Timer Service Features-@Timeout, @Schedule Stripped Down EJB Packaging-no need to create a separate EJB jar module. Rather, EJBs can be directly dropped into the WEB-INF/classes directory and deployed as part of the WAR. In a similar vein, the ejb-jar.xml deployment descriptor, if you happen to be using one, can be placed into the WEB-INF directory along with the web.xml file. It may also be possible to place an EJB jar into the WEB-INF/lib directory. Asynchronous Invocation of Session Beans-annotating a session bean method with @Asynchronous. EJB 3.1 can also support a return type of java.util.concurrent.Futureread less
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-Singletons:A singleton is a new kind of session bean that is guaranteed to be instantiated once for an application in a particular Java Virtual Machine (JVM)\*. A singleton is defined using the @Singleton annotation. - Application Startup/Shutdown Callbacks. - Sample Application:The Java EE 6...
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-Singletons:A singleton is a new kind of session bean that is guaranteed to be instantiated once for an application in a particular Java Virtual Machine (JVM)\*. A singleton is defined using the @Singleton annotation. - Application Startup/Shutdown Callbacks. - Sample Application:The Java EE 6 SDK Preview release includes an application that uses each of the EJB 3.1 features covered in this tip. The application is composed of a servlet, a singleton session bean, and a stateless session bean. Each session bean exposes a no-interface view. read less
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"Empowering Minds with 12+ Years of Expertise in Computer Science & Mathematics - Learn with Rajesh"

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Optional interfaces for Session beans and Singleton beans. EJB Timer Service enhancements and simplified packaging. that have been discussed in detail—EJB Timer Service enhancements and simplified packaging. Remember, none of this has been finalized yet, although a draft of the specification will...
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Optional interfaces for Session beans and Singleton beans. EJB Timer Service enhancements and simplified packaging. that have been discussed in detail—EJB Timer Service enhancements and simplified packaging. Remember, none of this has been finalized yet, although a draft of the specification will be released for review soon. All of this is really just a peek into the inner workings of the JCP so that you have a chance to provide feedback. read less
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1. Support for direct use of EJBs in the servlet container, including simplified packaging options. The current thought is to allow EJBs in the WEB-INF/classes directory while allowing ejb-jar.xml to reside in the WEB-INF directory, just like the web.xml file. In a similar vein, you would be able to...
read more
1. Support for direct use of EJBs in the servlet container, including simplified packaging options. The current thought is to allow EJBs in the WEB-INF/classes directory while allowing ejb-jar.xml to reside in the WEB-INF directory, just like the web.xml file. In a similar vein, you would be able to place an EJB jar into the WEB-INF/lib directory. 2. EJB Timer Service enhancements to support cron-like scheduling, deployment-time timer creation, and Stateful Session Bean timed objects. 3. Support for stateful web services via Stateful Session Bean web service endpoints - See more at: http://www.urbanpro.com/java-training-questions#sthash.GYgxBWqr.dpuf read less
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EJB Interfaces are Optional -- @Stateless or @Stateful. The Singleton Beans are Here-@Singleton. It’s Time for Timer Service Features-@Timeout, @Schedule Stripped Down EJB Packaging-no need to create a separate EJB jar module. Rather, EJBs can be directly dropped into the WEB-INF/classes directory...
read more
EJB Interfaces are Optional – @Stateless or @Stateful. The Singleton Beans are Here-@Singleton. It’s Time for Timer Service Features-@Timeout, @Schedule Stripped Down EJB Packaging-no need to create a separate EJB jar module. Rather, EJBs can be directly dropped into the WEB-INF/classes directory and deployed as part of the WAR. In a similar vein, the ejb-jar.xml deployment descriptor, if you happen to be using one, can be placed into the WEB-INF directory along with the web.xml file. It may also be possible to place an EJB jar into the WEB-INF/lib directory. Asynchronous Invocation of Session Beans-annotating a session bean method with @Asynchronous. EJB 3.1 can also support a return type of java.util.concurrent.Futureread less
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Let's simplify Coding, It's a great Fun.

Hi, One of the great feature of EJB3.1 is that they are POJO which means the EJBs can now be unit tested without Enterprise Server. Second being POJO, they do not need to implement and extend any Server related interface or classes as in the earlier 2.x EJBs. Vijay
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The best thing is you can deploy EJB 3.1 bean in Web server, app server is not required
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