Events - EventInvoker not found

Remoting SDK
1

Hello,
I’m trying to recreate the “SuperHTTPChat”-Client with oxygene. I’ve translated the objective-c code but the following exception will be raised:

  !> Exception of type ROUnknownClassException on thread 10e41 
    !> Message: An exception of type: ROUnknownClassException occurred: Unknown class found in the stream: ChatEvents_EventInvoker
    !> (null)

I do exactly the same like in the Xcode sample.
The ChatEvents_EventInvoker class is definitely implemented in the ChatServerLibrary_Intf.pas

ChatEvents_EventInvoker = public class(ROEventInvoker)
  public
    method Invoke_Message(aMessage: ROMessage) handler(aHandler: Object): Boolean;
    method Invoke_UserLogin(aMessage: ROMessage) handler(aHandler: Object): Boolean;
    method Invoke_UserLogout(aMessage: ROMessage) handler(aHandler: Object): Boolean;
  end;

Any ideas?

Thanks!
Benjamin

2 
namespace SuperHTTPChat;

interface

uses
  Foundation,
  RemObjectsSDK;

type
  ServerAccess = public class(IROClientChannelDelegate, IChatEvents)
  private
    class var _sharedInstance: nullable ServerAccess;
    class method get__sharedInstance: not nullable ServerAccess;
  public
    chatProxy: ChatServerService_AsyncProxy;
    loginProxy : LoginService_Proxy;
    eventReceiver : ROEventReceiver;
    class property sharedInstance: not nullable ServerAccess read get__sharedInstance;
    property serverURL: not nullable NSURL := NSURL.URLWithString("http://172.28.17.233:8099/bin") as not nullable; readonly;
    
    method Message(&From: String; Target: String; Message: String);
    method UserLogin(Nickname: String);
    method UserLogout(Nickname: String);
    
    method registerUser(aUserName: String);
  end;

implementation

class method ServerAccess.get__sharedInstance: not nullable ServerAccess;
begin

  if not assigned(self._sharedInstance) then
  begin
    self._sharedInstance := new ServerAccess();
  end;
  exit self._sharedInstance as not nullable;
end;

method ServerAccess.registerUser(aUserName: String);
begin
  var message := new ROBinMessage;
  var channel := new ROSuperHTTPClientChannel;
  
  channel.targetURL:= serverURL;
  eventReceiver := new ROEventReceiver;
  eventReceiver.channel := channel;
  eventReceiver.message := message;
  eventReceiver.serviceName := 'ChatServerService';
  eventReceiver.registerEventHandler(self);
  eventReceiver.active := true;
  
  loginProxy := new LoginService_Proxy withMessage(message) channel(channel);
  chatProxy := new ChatServerService_AsyncProxy withMessage(message) channel(channel);

  loginProxy.Login(aUserName);
end;

method ServerAccess.Message(&From: String; Target: String; Message: String);
begin
  writeLn(&From+' '+Target+' '+Message);
end;

method ServerAccess.UserLogin(Nickname: String);
begin
  writeLn('Login: '+Nickname);
end;

method ServerAccess.UserLogout(Nickname: String);
begin
  writeLn('Logout: '+Nickname);
end;

end.

This is the little sample. As soon as any chat member writes a message, the app will crash with the above exception.

3

Is ChatEvents_EventInvoker declared in your own code, or in an auto-generated Into file? In the former case, can you try adding an [objc] attribute to it to disable type name mangling?

—marc

1 Like
4

No, it is declared in an auto-generated Inft-file. But adding the [objc] to the declartion works anyway :wink: Thanks!

5

Thanx. i’ll make sure the codegen gets fixed for the next beta, then.