This exception handling is straight forward when we call a remote object method and add a Fault event listener to it. I have a case which is different.

details : From flex call a servlet to upload file from flex side. The servlet gets invoked and reads the data , does some processing by calling some helper classes. If any error occurs while processing i throw exception , which indirectly comes out of servlet as ServletException .

But at flex side we cannot add a fault event listener for uploading file. So how to catch such servlet exceptions….

Thanks & Regards
Jash

Thankyou for the response,
you are right, even the regular exception class is throwing some error message,
i could get the base error with the rootCause object.

Thankyou,
Regards,
V.Kranthi.

I don’t think you need to create custom exception classes. Even the regular Exception classes thrown are returned to you in Flex.

Hope this helps.

I am working on flex with java as backend and blazeds in the middle.

I found this doc very useful as this is what i have been looking for,
but i could not apply this exactly to my project as i don’t want to changed anything in my services, i cannot have my custom exceptions class,

but i want to get the error message from down the stack,
i could get the error message from down the stack in java using exception.getCause(),
can u suggest me a way to get this in flex.

Thankyou,
V.Kranthi.

Your blog has valuable and great tutorials.

Can you please tell how to do Exception handling for Flex-HTTPServices communication.

Class on Backend is as below.

—————————————-
public class ServiceAcceptor extends javax.servlet.http.HttpServlet {

private Logger logger=Logger.getLogger(ServiceAcceptor.class);

public ServiceAcceptor() {
super();
}

public void init(){
// ClarityAgent.getInstance();
}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doAction(request,response);

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doAction(request,response);
}

protected void doAction(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
IAction action = (IAction)ctx.getBean(“ServicesController”);
try{
action.doAction(request,response);
}catch(Exception e){
throw new ServletException(“Exception from BackEnd”);
}

}
———————————-

On flex side we see the following variables. I dont see the cutom error which I put on backend side.

———————————-

message = mx.messaging.messages.ErrorMessage (@b3e29d1)
body = Object (@b3ce269)
clientId = “DirectHTTPChannel0″
correlationId = “DB42658C-64A1-2618-156A-E11B7AFCE636″
destination = “”
extendedData = null
faultCode = “Server.Error.Request”
faultDetail = “Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032: Stream Error. URL: http://161.15.160.169:7070/ProductWS/services/GetClientReports"]. URL: /ProductWS/services/GetClientReports”
faultString = “HTTP request error”
headers = Object (@b3ce179)
messageId = “B355B8AC-7B18-AC77-5604-E11BA1FDC34A”
rootCause = flash.events.IOErrorEvent (@b1b83f9)
bubbles = false
cancelable = false
currentTarget = flash.net.URLLoader (@b3e2a81)
eventPhase = 2
target = flash.net.URLLoader (@b3e2a81)
text = “Error #2032: Stream Error. URL: http://161.15.160.169:7070/ProductWS/services/GetClientReports”
type = “ioError”
timestamp = 0
timeToLive = 0

————————————-

If you can find solution please let me know.
Thanks a lot in advance

Kranthi