Slight correction, the protocol part looks like following exactly
<partial-response>
....
<error>
<error-name>...</error-name>
<error-message><![CDATA[]]></error-message>
</error>
....
</partial-response>
what happens is if you issue that:
the response gets an error directive -> the javascripts drag the error
into the error listener queue -> the queue does whatever it does with
the errors (in case of the latest myfaces scripts from the trunk showing
an alert dialog under development mode ignoring it under production
unless you have your own listener set)
Werner
Am 23.06.10 23:10, schrieb Werner Punz:
Hia mark since you are directly on the response writer anyway, look at
the ajax protocol it has an <error> part where you can drag in errors
which are pushed into the ajax error listener queue automatically:
<partial-response>
<error>
<error-name>...</error-name>
<error-message>...</error-message>
</error>
</partial-response>
thats how it looks the error then is issued and an error listener is
triggered.
The partialResponseWriter should have a startError element afair.
Werner
Am 23.06.10 18:56, schrieb Mark Li:
Hi everyone,
There is any solution for Ajax Error Handler? the
"org.apache.myfaces.ERROR_HANDLER" seems dont work.
The following is my temp solution:
I hack the code about ajax exception handler. because I try the error
handler extension, it doesnot work for ajax. and I cant find out any
extension point either.
there is my code:
org.apache.myfaces.renderkit.ErrorPageWriter
{
.....
public static void handleThrowable(FacesContext facesContext,
Throwable ex) throws FacesException
{
...
if(!ajaxErrorHandlerInited){
try {
String ajaxErrorHandlerString =
facesContext.getExternalContext().getInitParameter("org.apache.myfaces.AJAX_ERROR_HANDLER");
if(ajaxErrorHandlerString != null){
Class<?> handler =
ErrorPageWriter.class.getClassLoader().loadClass(ajaxErrorHandlerString);
ajaxErrorHandler = handler.newInstance();
ajaxErrorHandlerMethod =
ajaxErrorHandler.getClass().getMethod("handleException",
FacesContext.class,
}
} catch (Throwable e) {
e.printStackTrace();
} finally{
ajaxErrorHandlerInited = true;
}
}
if(ajaxErrorHandler != null){
try {
String message = (String)
ajaxErrorHandlerMethod.invoke(ajaxErrorHandler, facesContext, ex);
partialWriter.write(message);
} catch (Throwable e) {
e.printStackTrace();
if(ex.getCause() == null)
partialWriter.write(ex.getCause().toString());
else
partialWriter.write(ex.getMessage());
}
}else{
if (ex.getCause() != null)
{
partialWriter.write(ex.getCause().toString());
}
else
{
partialWriter.write(ex.getMessage());
}
}
...
}
.....
}
you can see I define a new "org.apache.myfaces.AJAX_ERROR_HANDLER"
parameter for myfaces. myfaces or specification should have this feature.
Best Regard
Mark
