Exception handling in EJB, JAVA Programming

Assignment Help:

Java has two kinds of exceptions:

1. Checked exception: handled from java.lang.Exception but not java.lang.RuntimeException.

2. Unchecked exception: handled from java.lang.RuntimeException thrown by JVM.

 

1273_Exception handling in EJB.png

 

EJB has two kinds of exceptions:

1. System   Exception :   is   an   unchecked   exception produced   from java.lang.RuntimeException.   An EJBException is an unchecked exception, which is started from java.lang.RuntimeException.

2. Application Exception : is generic to an application and thrown because of violation of business rules. An Application Exception is a checked exception that is either described by the bean developer and does not import java.rmi.RemoteException.

A  System  Exception  is  given  by  the  system  and  is  not  recoverable. Because the System Exceptions are unpredictable when they occur, the EJB container is the only one responsible for trapping the System Exceptions. The container usually wraps any RuntimeException in RemoteException, which subsequently puts thrown to the caller. In addition to intercepting System Exception the container can give the errors.

 


Related Discussions:- Exception handling in EJB

What is an introduction in aop, An introduction permits the user to add new...

An introduction permits the user to add new methods or attributes to an existing class. This can then be explained to an existing class without having to change the structure of th

Basic difference between equals and identity method, The == gives true, i...

The == gives true, if the variable reference points to the similar types of object in memory. That is a " shallow comparison ".   The equals () - gives the results of run

Prepare a java program to read .gpx files, Prepare a Java program to read ....

Prepare a Java program to read .GPX files Project Description: Prepare a Java program (GPX_Tracks_to_Text.Java) for Windows to: - Read every .GPX file in a provide drive a

Stream as an object, What interface must an object implement before it can ...

What interface must an object implement before it can be written to a stream as an object?      Ans) An object must execute the Serializable or Externalizable interface before i

What is jar archives, What is JAR archives? JAR archives are ZIP archiv...

What is JAR archives? JAR archives are ZIP archives along with a different extension. They contain a hierarchy of files and directories. In spirit a JAR file can take the place

Synchronization and its importance, What do you mean by synchronization an...

What do you mean by synchronization and its importance?

What is invoking static methods, What is Invoking static methods If a m...

What is Invoking static methods If a method or field is declared static, you access it through using the class name rather than a reference to a particular example of the class

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd