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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