Exception Handling

Exception handling for Java clients for the IOM server is not significantly different from exception handling for any other Java program. Many methods in the stubs declare that they throw checked exceptions. When calling those methods, you must do so in a try block, and you must be sure to provide a catch block that handles each possible exception. Documentation for the stubs provides information about why each exception is thrown and what to do when one is thrown.

Methods in the stubs can also throw unchecked exceptions when there is an error related to the distributed nature of your application. For example, an unchecked exception might be thrown when the communications subsystem fails or when the stubs are out of date relative to the IOM objects. All of these exceptions are subclasses of org.omg.CORBA.SystemException. A complete list of all subclasses is available in the CORBA specification. Because they are unchecked exceptions, the Java compiler does not require you to place your method calls inside a try block, but you might want to anyway.