Handling Java Exceptions in Flex application
Category: Flex Error | 2,564 views | 4 Comments
Accessing the Throwable object in Flex
RemoteObject component invokes the fault event when an error occurs while remote method invocation. The fault event handler is provided with the FaultEvent object. This FaultEvent object has property named message of type mx.messaging.messages.ErrorMessage. The message property holds the Throwable object from the Java method in the rootCause property. We need to use this rootCause property to retrieve the properties which are set to the Throwable object in Java. All the public properties from the Throwable object are available.
We will see a sample application. In this application I am creating a custom Exception and adding a getter method to that, which will return my custom data. From the Flex application I will access both the error message and the custom data.
MyException.java
public class MyException extends Exception {
public MyException(String message) {
super(message);
}
public String getMyName(){
return “Sujit Reddy G”;
}
}
Method throwing exception
This method will throw the custom exception created above, add this method to a Java class. Invoke the below method using RemoteObject component in Flex.
public void throwCheckedException() throws Exception{
throw new MyException(”This is a checked exception”);
}
Reading values in Flex application
We add the method below as the fault event handler to the RemoteObject component in the Flex application. You can see that we accessed the rootCauseobject to retrieve the properties of the custom Exception object returned from the Java method. Read more…
