Dbus Java - addSigHandler - GNU Classpath

[Ed Hemphill]

Hi,

I was hoping someone could assist with the below issues. It may be
something obvious to DBus as I am new to it.
I have seen some posts from Matthew Johnson in the past which were
quite useful, but 'FrzRemoteSignal' is in a package.


When trying to add a SigHandler for a DBusSignal I am getting the
following exception:

type.getName: org.freedesktop.DBus   type.getSimpleName: DBus
0    [main] ERROR Broadcast  - Error: Member name
'FrzRemoteSignal$Sig' is invalid--> [
org.freedesktop.dbus.exceptions.DBusException ] Member name
'FrzRemoteSignal$Sig' is invalid -->
org.freedesktop.dbus.exceptions.DBusException: Member name
'FrzRemoteSignal$Sig' is invalid
   at org.freedesktop.dbus.DBusConnection.addSigHandler(Unknown Source)
   at org.freedesktop.dbus.AbstractConnection.addSigHandler(Unknown Source)
   at framez.io.dbus.FrzDBusDrv.startFrzSigListen(FrzDBusDrv.java:96)
   at framez.io.dbus.FrzDBusDrv.connect(FrzDBusDrv.java:70)
   at DBusBroadcastSigTest.initApp(DBusBroadcastSigTest.java:96)
   at framez.core.controller.FrzControllerExec.main(FrzControllerExec.java:104)

What I find weird is that the Member name is being called
FrzRemoteSignal$Sig - where as DBus's own information does not have
this dollar sign:

[.()] Handling incoming signal: DBusSignal(1,3) { Signature=>s,
Sender=>org.freedesktop.DBus, Destination=>:1.201,
Member=>NameAcquired, Interface=>org.freedesktop.DBus,
Path=>/org/freedesktop/DBus } { framez.tests.dbus.broadcast }

I have ran across a bug in GNU Classpath 0.98 (which is patched now)
for Class.getName and Class.getSimpleName - where both of these were
being reported as the same. This bug is patched but wonder if this
could be another problem like that...


As above, using the dbus-java-debug libraries...

[.()] Dequeueing MethodCall(0,3) { Signature=>s,
Destination=>org.freedesktop.DBus, Member=>AddMatch,
Interface=>org.freedesktop.DBus, Path=>/org/freedesktop/DBus } {
type='signal',member='FrzRemoteSignal$Sig',interface='framez.io.dbus.FrzRemoteSignal'
}
[.()] Got message: MethodCall(0,3) { Signature=>s,
Destination=>org.freedesktop.DBus, Member=>AddMatch,
Interface=>org.freedesktop.DBus, Path=>/org/freedesktop/DBus } {
type='signal',member='FrzRemoteSignal$Sig',interface='framez.io.dbus.FrzRemoteSignal'
}
[.()] <= MethodCall(0,3) { Signature=>s,
Destination=>org.freedesktop.DBus, Member=>AddMatch,
Interface=>org.freedesktop.DBus, Path=>/org/freedesktop/DBus } {
type='signal',member='FrzRemoteSignal$Sig',interface='framez.io.dbus.FrzRemoteSignal'
}
[.()] Writing all 40 buffers simultaneously to Unix Socket
[.()] => Error(1,5) { Signature=>s, Sender=>org.freedesktop.DBus,
Destination=>:1.195, Reply Serial=>3, Error
Name=>org.freedesktop.DBus.Error.MatchRuleInvalid } { Member name
'FrzRemoteSignal$Sig' is invalid
 }
[.()] Handling incoming error: Error(1,5) { Signature=>s,
Sender=>org.freedesktop.DBus, Destination=>:1.195, Reply Serial=>3,
Error Name=>org.freedesktop.DBus.Error.MatchRuleInvalid } { Member
name 'FrzRemoteSignal$Sig' is invalid
 }



FrzRemoteSignal DBusInterface----------->

package framez.io.dbus;

import org.freedesktop.dbus.DBusSignal;
import org.freedesktop.dbus.DBusInterface;
import org.freedesktop.dbus.Struct;
import org.freedesktop.dbus.exceptions.DBusException;

import framez.core.signal.FrzSignal;

/** This class is used by d-bus for transmission of a FrzSignal<br>
 * The FrzSignal is essentially represented by two Struct(s) <br>
 * See org.freedesktop.dbus for why this must be DBusSignal inside a
DBusInterface.
 * @author ed
 * @see FrzSignal
 */
public interface FrzRemoteSignal extends DBusInterface {
    /** We only have one signal for this class right now, Send a signal   */
    public static class Sig extends DBusSignal {    	
    	public final Struct signal;
    	public final Struct data;
    	public Sig(String path, Struct signal, Struct data )
        throws DBusException {
    		super(path, signal, data);
	        this.signal = signal;
	        this.data = data;
    	}    	
    }	
}





in other code - adding the sigHandler---------->

	public void startFrzSigListen() {
		if (remoteSigHandler != null)
			try {
				conn.addSigHandler(FrzRemoteSignal.Sig.class, remoteSigHandler);
			} catch (DBusException e) {
				FrzLog.error("Error: " + e.getMessage() + "-->" + FrzLog.stringifyTrace(e));
			} catch (ClassCastException e) {
				FrzLog.error("Error: " + e.getMessage() + "-->" + FrzLog.stringifyTrace(e));
			}
		else
			FrzLog.error("remoteSigHandler is uninitialized.");
	}


remoteSigHandler is just an instance of...

	public class FrzRemoteSigHandler implements DBusSigHandler {
		public void handle(DBusSignal s) {
			if(s instanceof FrzRemoteSignal.Sig) {
				FrzRemoteSignal.Sig sig = (FrzRemoteSignal.Sig) s;
				FrzSignal frzsig = null;
				FrzLog.debug("Got incoming remote signal: " +
((FrzSignal.SigStruct) sig.signal).Code);
				if(((FrzSignal.SigStruct)sig.signal).dataTypeName != "") // if the
signal had a type, then...
					 frzsig = new FrzSignal( (FrzSignal.SigStruct) sig.signal,
sig.data ); // try to create with data
				else // otherwise just a Signal, but no FrzSigData
					 frzsig = new FrzSignal( (FrzSignal.SigStruct) sig.signal, null );
				sigQueue.enqueSignal(frzsig); // send to event queue
			}
		}
	}


I am happy to post more code, but this is the crux of the DBus
related... any help appreciated

-Ed