[Mono-bugs] [Bug 53020][Maj] New - Remoting Interop between Microsoft CLR 1.0 on Windows and Mono on Linux with AsyncDelegates

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Changed by matt.davey@finetix.com.

http://bugzilla.ximian.com/show_bug.cgi?id=53020

--- shadow/53020	2004-01-18 07:48:57.000000000 -0500
+++ shadow/53020.tmp.30890	2004-01-18 07:48:57.000000000 -0500
@@ -0,0 +1,133 @@
+Bug#: 53020
+Product: Mono/Runtime
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Major
+Component: misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: matt.davey@finetix.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Remoting Interop between Microsoft CLR 1.0 on Windows and Mono on  Linux with AsyncDelegates
+
+Please fill in this template when reporting a bug, unless you know what 
+you are doing.
+Description of Problem:
+
+Invoking a client callback from server to client via an Async delegate 
+generates this error on Mono:
+
+System.InvalidCastException: Cannot cast from source type to destination 
+type
+in <0x0005b> servicecomlib.HelloServer:callback (System.IAsyncResult)
+
+However the method appears to be successfully called on the client.
+
+
+Steps to reproduce the problem:
+1. Call a client method via an AsyncDelegate from the server.  Example 
+code as follows:
+
+public class ClientCallback : MarshalByRefObject, IClientCallback
+{
+public void Send(ArrayList al) 
+{
+Console.WriteLine("ClientCallback.Send was called");
+foreach (object o in al) 
+{
+  Console.WriteLine("\t" + o);
+}
+}
+}
+
+static void Main(string[] args)
+{
+string svr = "tcp://"+ args[0] + ":8085/Test.rem";
+ChannelServices.RegisterChannel(new TcpChannel(0));
+IServerObject s = Activator.GetObject(typeof(IServerObject),svr) as 
+IServerObject;
+ClientCallback c = new ClientCallback();
+Console.WriteLine("Passing client object to server");
+s.CallClient(c);
+}
+
+
+server code:
+
+static void Main(string[] args)
+{
+ChannelServices.RegisterChannel(new TcpChannel(8085));
+RemotingConfiguration.RegisterWellKnownServiceType(typeof
+(servicecomlib.HelloServer),"Test.rem", WellKnownObjectMode.Singleton);
+Console.ReadLine();
+}
+
+public delegate void crap(ArrayList al);
+
+public class HelloServer: MarshalByRefObject , IServerObject
+{
+	public HelloServer() 
+	{
+		Console.WriteLine("HelloServer constructor");
+	}
+
+	public void CallClient(IClientCallback c) 
+	{
+		ArrayList al = new ArrayList();
+		al.Add("one");
+		al.Add("two");
+
+	        Console.WriteLine("Now doing async callback");
+		crap a = new crap(c.Send);
+		a.BeginInvoke(al, new AsyncCallback(callback), null);
+	} 
+
+	private void callback(IAsyncResult a) 
+	{
+	        try 
+		{
+			crap Caller = (crap)((AsyncResult)
+a).AsyncDelegate;
+				Caller.EndInvoke(a);
+			} 
+			catch (Exception ex) 
+			{
+				Console.WriteLine(ex.ToString());
+			}
+		}
+}
+
+2. In the "callback" method above, the cast appears to fail, generating 
+this error message:
+
+System.InvalidCastException: Cannot cast from source type to destination 
+type
+in <0x0005b> servicecomlib.HelloServer:callback (System.IAsyncResult)
+
+3. If the client remoting method is tagged with 
+[System.Runtime.Remoting.Messaging.OneWay], then the exception does not 
+to happen
+
+Actual Results:
+
+System.InvalidCastException: Cannot cast from source type to destination 
+type
+in <0x0005b> servicecomlib.HelloServer:callback (System.IAsyncResult)
+
+
+Expected Results:
+
+Client method should be called by the server and no exception should be 
+generateed
+
+How often does this happen? 
+
+Always
+
+Additional Information: