This separation of interface and implementation is sometimes unnecessarily cumbersome and adds little value - this is especially true for fine-grained components that are accessed locally from clients within the same class CalculatorBean implements CalculatorService Future performCalculation(. A local interface defines the business methods that are exposed to the client and that are implemented on the bean class. The EJB 3.0 local client view is based on a plain old Java interface (POJI) called a local business interface. Salaries vary quite a lot by the level of expertise required (with 61,000 listed for Junior Java developer and 112,000 for Senior Developer Designer or Senior. Is a subset of EJB 3.1 for inclusion in a variety of Java EE profiles. You can now place EJB classes directly in a WAR file. If your aim is OCM - I would recommend reading books recommended here, do not bother with Java EE 7 exam, and proceed to OCM directly. Not sure when OCM exam updated, but suspect it valid against Java EE 6. ![]() OCM (architect) does not have any pre-requisite to take some exam. Removes the restriction that enterprise bean classes must be packaged in an ejb-jar file. 4.97 - 70.00 8 Used from 4.97 8 New from 44. There is some exam about Java EE from RedHat, consider it as option. Java (EE) Enterprise Architect Certified Master Essay These certifications may become the next step in your professional growth after passing the 1Z0-811 exam and getting Java Foundations Junior Associate (actually, it's the first official Java certificate demonstrating your knowledge of the Java programming language and concepts). Enables you to invoke session bean methods asynchronously by specifying an annotation. Lets you easily share state between multiple instances of an enterprise bean component or between multiple enterprise bean components in an application. Allows you to specify an enterprise bean using only a bean class without having to write a separate business interface. Some improvements made in EJB 3.1 are as follows:
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