There is a SerializationException
(public class SerializationException
extends java.lang.Exception) in gwt1.5.
SerializableException is depricated in 1.5
I shall try your suggestion of extending the Exception or use the
SerilizationException and post the code here.
Thank you both for your help,
Appreciate it
Satya
On Nov 26, 12:54 pm, jossey <[EMAIL PROTECTED]> wrote:
> I am sorry... my bad... I read it as SerializationException....
> Looked at the SerializableException in gwt... it is just an Exception
> implementing IsSerializable interface... so it all makes sense.
> Thanks Ravi for clarifying.
>
> BTW, in 1.5 gwt supports serialization of objects implementing
> java.io.Serializable.
> So just by extending Exception it would work.
>
> Thanks again,
> Jossey.
>
> On Nov 26, 8:56 am, Ravi M <[EMAIL PROTECTED]> wrote:
>
> > Jossey
>
> > Quite the contrary, actually. I started off with a custom exception
> > which was merely a child class of Exception that I intended to use in
> > RPC calls (i.e. service methods throw it). This actually didn't work
> > in the ways expected, i.e. when the server threw the exception I was
> > unable to retrieve the exception message in the client, or find out
> > what the cause was. Which is when some digging around revealed that if
> > you want to send the exception over the wire, it has to be a GWT
> > SerializableException.
>
> > This is with 1.4.6x, of course this may have changed in 1.5.x, I am
> > not sure.
>
> > Ravi
>
> > On Nov 26, 5:58 pm, jossey <[EMAIL PROTECTED]> wrote:
>
> > > Hi,
> > > Why are we extending SerializableException?
> > > Is that because the starting example had it so?
> > > I think it kinds of gives out a wrong message. ...
> > > just extends Exception should do.
>
> > > not very relevant to the discussion.... anyways...
>
> > > Jossey.
>
> > > On Nov 25, 3:33 pm, Ravi M <[EMAIL PROTECTED]> wrote:
>
> > > > Ah me. Step 1 should read:
>
> > > > 1. Declare your RPC exception like so:
>
> > > > public class MyRPCException extends SerializableException {
> > > > public MyRPCException() {
> > > > super();
> > > > }
>
> > > > public MyRPCException(String message) {
> > > > super(message);
> > > > }
>
> > > > //... other stuff?
>
> > > > }
>
> > > > On Nov 26, 1:32 am, Ravi M <[EMAIL PROTECTED]> wrote:
>
> > > > > Satya,
>
> > > > > The following should work.
>
> > > > > 1. Declare your RPC exception like so:
>
> > > > > public class MyRPCException extends SerializableException {
> > > > > public TrackerRPCException() {
> > > > > super();
> > > > > }
>
> > > > > public MyRPCException(String message) {
> > > > > super(message);
> > > > > }
>
> > > > > //... other stuff?
>
> > > > > }
>
> > > > > 2. Declare your service method like so:
>
> > > > > public SomeReturnedObject myServiceMethod(...arguments...) throws
> > > > > MyRPCException;
>
> > > > > 3. Declare your async service method like so:
>
> > > > > public void myServiceMethod(...arguments..., AsyncCallback callback);
>
> > > > > 4. The server side implementation of your service method may be like
> > > > > so:
>
> > > > > public SomeReturnedObject myServiceMethod(...arguments...) throws
> > > > > MyRPCException {
> > > > > SomeReturnedObject ret = null;
> > > > > try {
> > > > > // Do stuff to "populate" ret. This stuff could
> > > > > potentially fail.
> > > > > } catch (SomeNonGWTSerializableServerSideException e) {
> > > > > throw new MyRPCException("This is an error message that
> > > > > may be appropriate to show in the UI: " + e.getMessage());
> > > > > }
> > > > > return ret;
> > > > > }
>
> > > > > 5. In your AsyncCallback in the client:
>
> > > > > public void onSuccess(Object result) {
> > > > > SomeReturnedObject foo = (SomeReturnedObject) result;
> > > > > // Happiness and tranquility reign supreme
> > > > > };
>
> > > > > public void onFailure(Throwable exception) {
> > > > > try {
> > > > > throw exception;
> > > > > } catch (MyRPCException e) {
> > > > > // Show the error message to the user,
> > > > > // or handle however you want to.
> > > > > }
> > > > > };
>
> > > > > This should work, there may be some overkill in this though. All this
> > > > > is GWT 1.4.6x, I'm not sure if any of this has changed in 1.5.x.
>
> > > > > Hope this helps
>
> > > > > Ravi
>
> > > > > On Nov 26, 1:08 am, satya <[EMAIL PROTECTED]> wrote:
>
> > > > > > Thank you very much,
> > > > > > I guess i can return the String "IllegalDateRangeException" when
> > > > > > throwing that exception from my Service and check for that in my
> > > > > > onFailure class.
>
> > > > > > public void onFailure( Throwable caught )
> > > > > > {
> > > > > > if ( caught.getMessage().contains
> > > > > > ( "IllegalDateRangeException" ) )
>
> > > > > > //handle my class.
> > > > > > }
>
> > > > > > Thnak you,
> > > > > > Satya
>
> > > > > > On Nov 25, 1:38 pm, "olivier nouguier" <[EMAIL PROTECTED]>
> > > > > > wrote:
>
> > > > > > > On Tue, Nov 25, 2008 at 8:14 PM, satya <[EMAIL PROTECTED]> wrote:
>
> > > > > > > > Also
>
> > > > > > > > when i call the actual method, does the exception get caught in
> > > > > > > > the
> > > > > > > > failure method or in my catch method?
>
> > > > > > > > For example:
>
> > > > > > > > AsyncCallback callBack = new AsyncCallback() {
> > > > > > > > public void onFailure( Throwable caught )
> > > > > > > > {
> > > > > > > > //Is the exception caught here?????
> > > > > > > here !
> > > > > > > > }
>
> > > > > > > > public void onSuccess( Object result )
> > > > > > > > {
>
> > > > > > > > }
> > > > > > > > try
> > > > > > > > {
> > > > > > > > createNewRuleService.createRule( screenType,
> > > > > > > > eventRuleForm, callBack );
> > > > > > > > }
> > > > > > > > catch ( IllegalDateRangeException e )
> > > > > > > > {
> > > > > > > > //// or the exception is caught here?
>
> > > > > > > > }
>
> > > > > > > You should notice the differences between RemoteInterface and its
> > > > > > > Asyn counter part:
> > > > > > > * return type: the asyn interface method doesn't have return value
> > > > > > > ===> it will be pass as parameter asynchronously in onSuccess
> > > > > > > callback.
> > > > > > > * exception: are not part of the async method ===> it will be
> > > > > > > pass
> > > > > > > as parameter asynchronously in onFailure callback.
>
> > > > > > > > Thank you very much for your help. I appreciate it.
>
> > > > > > > > Satya
>
> > > > > > > > On Nov 25, 1:10 pm, satya <[EMAIL PROTECTED]> wrote:
> > > > > > > >> How do i specify in the service signature that this is GWT
> > > > > > > >> serializable?
>
> > > > > > > >> my method signature looks like:
> > > > > > > >> public String create(Rule rule) throws
> > > > > > > >> IllegalDateRangeException;
>
> > > > > > > >> On Nov 23, 5:23 am, "olivier nouguier" <[EMAIL PROTECTED]>
> > > > > > > >> wrote:
>
> > > > > > > >> > On Sun, Nov 23, 2008 at 6:58 AM, satya <[EMAIL PROTECTED]>
> > > > > > > >> > wrote:
>
> > > > > > > >> > > Hi,
>
> > > > > > > >> > > Can i pass exceptions between client and server.
> > > > > > > >> > > Can i have an RPC serice with method that throw an user
> > > > > > > >> > > defined
> > > > > > > >> > > exception and handle that exception in the client side?
>
> > > > > > > >> > Yes as long as your exeption is declared in the Service
> > > > > > > >> > Signature (to
> > > > > > > >> > be declared as "GWT serialisable").
>
> > > > > > > >> > > I created an userdefined exception:
> > > > > > > >> > > ------------------------------------------------------
> > > > > > > >> > > public class IllegalDateRangeException extends
> > > > > > > >> > > SerializationException
> > > > > > > >> > > implements IsSerializable
> > > > > > > >> > > {
> > > > > > > >> > > private String errorMessage = null;
>
> > > > > > > >> > > public IllegalDateRangeException ( String error )
> > > > > > > >> > > {
> > > > > > > >> > > errorMessage = error;
> > > > > > > >> > > }
>
> > > > > > > >> > > public String toString()
> > > > > > > >> > > {
> > > > > > > >> > > return "Exception occurred: " + errorMessage;
> > > > > > > >> > > }
>
> > > > > > > >> > > public String getErrorMessage()
> > > > > > > >> > > {
> > > > > > > >> > > return errorMessage;
> > > > > > > >> > > }
>
> > > > > > > >> > > public void setErrorMessage( String errorMessage )
> > > > > > > >> > > {
> > > > > > > >> > > this.errorMessage = errorMessage;
> > > > > > > >> > > }
>
> > > > > > > >> > > }
>
> > > > > > > >> > > and my RPC method throws this exception:
> > > > > > > >> > > ------------------------------------------------
> > > > > > > >> > > public String create(Rule rule) throws
> > > > > > > >> > > IllegalDateRangeException;
>
> > > > > > > >> > > and i want to catch this exception in the client side and
> > > > > > > >> > > perform
> > > > > > > >> > > actions.
>
> > > > > > > >> > > But i get the following error from GWT:
> > > > > > > >> > > [ERROR] Type
> > > > > > > >> > > 'com.cerner.cwx.ruleswizard.client.IllegalDateRangeException'
> > > > > > > >> > > was not
> > > > > > > >> > > serializable and has no concrete serializable subtypes
>
> > > > > > > >> > > Any suggestions?
> > > > > > > >> > > Any help on this is greatly appreciated.
>
> > > > > > > >> > > Thank you
> > > > > > > >> > > Satya
>
> > > > > > > >> > --
> > > > > > > >> > Si l'ignorance peut servir de consolation, elle n'en est pas
> > > > > > > >> > moins illusoire.
>
> > > > > > > --
> > > > > > > Si l'ignorance peut servir de consolation, elle n'en est pas
> > > > > > > moins illusoire.
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