adding function to parse error object
[contrib/cloudeebus.git] / cloudeebus / cloudeebus.js
index 64a4a9f..8a5b420 100644 (file)
@@ -28,7 +28,10 @@ var dbus = { // hook object for dbus types not translated by python-json
 
 /*****************************************************************************/
 
-var cloudeebus = window.cloudeebus = {version: "0.3.1"};
+var cloudeebus = window.cloudeebus = {
+               version: "0.5.1",
+               minVersion: "0.3.2"
+};
 
 cloudeebus.reset = function() {
        cloudeebus.sessionBus = null;
@@ -41,18 +44,42 @@ cloudeebus.reset = function() {
 cloudeebus.log = function(msg) { 
 };
 
+cloudeebus.getError = function(error) {
+       if (error.desc && error.uri)
+               return error.desc + " : " + error.uri;
+       if (error.desc)
+               return error.desc;
+       if (error.uri)
+               return error.uri;
+       if (error.message)
+               return error.message;
+       return error;
+};
+
+cloudeebus.versionCheck = function(version) {
+       var ver = version.split(".");
+       var min = cloudeebus.minVersion.split(".");
+       for (var i=0; i<ver.length; i++) {
+               if (Number(ver[i]) > Number(min[i]))
+                       return true;
+               if (Number(ver[i]) < Number(min[i]))
+                       return false;
+       }
+       return true;
+};
+
 
 cloudeebus.connect = function(uri, manifest, successCB, errorCB) {
        cloudeebus.reset();
        cloudeebus.uri = uri;
        
        function onCloudeebusVersionCheckCB(version) {
-               if (cloudeebus.version == version) {
+               if (cloudeebus.versionCheck(version)) {
                        cloudeebus.log("Connected to " + cloudeebus.uri);
                        if (successCB)
                                successCB();
                } else {
-                       var errorMsg = "Cloudeebus server version " + version + " and client version " + cloudeebus.version + " mismatch";
+                       var errorMsg = "Cloudeebus server version " + version + " unsupported, need version " + cloudeebus.minVersion + " or superior";
                        cloudeebus.log(errorMsg);
                        if (errorCB)
                                errorCB(errorMsg);
@@ -60,9 +87,9 @@ cloudeebus.connect = function(uri, manifest, successCB, errorCB) {
        }
        
        function onWAMPSessionAuthErrorCB(error) {
-               cloudeebus.log("Authentication error: " + error.desc);
+               cloudeebus.log("Authentication error: " + cloudeebus.getError(error));
                if (errorCB)
-                       errorCB(error.desc);
+                       errorCB(cloudeebus.getError(error));
        }
        
        function onWAMPSessionAuthenticatedCB(permissions) {
@@ -81,7 +108,7 @@ cloudeebus.connect = function(uri, manifest, successCB, errorCB) {
                if (manifest)
                        cloudeebus.wampSession.authreq(
                                        manifest.name, 
-                                       {permissions: JSON.stringify(manifest.permissions)}
+                                       {permissions: manifest.permissions}
                                ).then(onWAMPSessionChallengedCB, onWAMPSessionAuthErrorCB);
                else
                        cloudeebus.wampSession.authreq().then(function() {
@@ -120,7 +147,6 @@ cloudeebus.SystemBus = function() {
 cloudeebus.BusConnection = function(name, session) {
        this.name = name;
        this.wampSession = session;
-       this.service = null;
        return this;
 };
 
@@ -133,19 +159,32 @@ cloudeebus.BusConnection.prototype.getObject = function(busName, objectPath, int
 };
 
 
-cloudeebus.BusConnection.prototype.addService = function(serviceName, successCB, errorCB) {
+cloudeebus.BusConnection.prototype.addService = function(serviceName) {
        var self = this;
        
-       cloudeebusService = new cloudeebus.Service(this.wampSession, this, serviceName);
+       var promise = new cloudeebus.Promise(function (resolver) {
+         cloudeebusService = new cloudeebus.Service(self.wampSession, self, serviceName);
        
-       function busServiceAddedSuccessCB(service) {
-               self.service = cloudeebusService;
-               if (successCB)
-                       successCB(cloudeebusService);
-       }
+         function busServiceAddedSuccessCB(service) {
+                 try {
+                         service.isCreated = true;
+                         var result = [cloudeebusService];
+                         resolver.accept(result[0], true);
+                 }
+                 catch (e) {
+                         cloudeebus.log("Method callback exception: " + e);
+                         resolver.reject(e, true);
+                 }             
+         }
+       
+         function busServiceErrorSuccessCB(error) {
+                 resolver.reject(error, true);
+         }
+       
+         cloudeebusService.add(this).then(busServiceAddedSuccessCB, busServiceErrorSuccessCB);
+       });
        
-       cloudeebusService.add(busServiceAddedSuccessCB, errorCB);
-       return cloudeebusService;
+       return promise;
 };
 
 cloudeebus.BusConnection.prototype.removeService = function(serviceName, successCB, errorCB) {
@@ -165,6 +204,20 @@ cloudeebus.BusConnection.prototype.removeService = function(serviceName, success
 
 
 /*****************************************************************************/
+//Generic definition for an agent. An agent need :
+//srvDbusName : the DBus parent service
+//objPath : a DBus path to access it
+//jsHdl : a Javascript handler to process methods, 
+//xml : the xml which describe interface/methods/signals...
+Agent = function(srvDbusName, objPath, jsHdl, xml) {
+       this.srvName = srvDbusName;
+       this.registered = false;
+       this.xml = xml;
+       this.objectPath = objPath;
+       this.jsHdl = jsHdl;
+       return this;
+};
+
 
 cloudeebus.Service = function(session, busConnection, name) {
        this.wampSession = session;
@@ -174,37 +227,45 @@ cloudeebus.Service = function(session, busConnection, name) {
        return this;
 };
 
-cloudeebus.Service.prototype.add = function(successCB, errorCB) {
+cloudeebus.Service.prototype.add = function(promise) {
        var self = this;
+       self.promise = promise;
+       var resolver = self.promise.resolver;
        
        function ServiceAddedSuccessCB(serviceName) {
-               if (successCB) {
-                       try { // calling dbus hook object function for un-translated types
-                               successCB(self);
-                       }
-                       catch (e) {
-                               alert(arguments.callee.name + "-> Method callback exception: " + e);
-                       }
+               try { // calling dbus hook object function for un-translated types
+                       var result = [self];
+                       resolver.accept(result[0], true);
                }
+               catch (e) {
+                       cloudeebus.log("Method callback exception: " + e);
+                       resolver.reject(e, true);
+               }               
        }
        
+       function ServiceAddedErrorCB(error) {
+               cloudeebus.log("Error adding service method: " + self.name + ", error: " + cloudeebus.getError(error));
+               self.promise.resolver.reject(cloudeebus.getError(error), true);
+       }
+
        var arglist = [
            this.busConnection,
            this.name
            ];
 
        // call dbusSend with bus type, destination, object, message and arguments
-       this.wampSession.call("serviceAdd", arglist).then(ServiceAddedSuccessCB, errorCB);
+       this.wampSession.call("serviceAdd", arglist).then(ServiceAddedSuccessCB, ServiceAddedErrorCB);
+       return promise;
 };
 
 cloudeebus.Service.prototype.remove = function(successCB, errorCB) {
        function ServiceRemovedSuccessCB(serviceName) {
                if (successCB) {
-                       try { // calling dbus hook object function for un-translated types
+                       try {
                                successCB(serviceName);
                        }
                        catch (e) {
-                               alert(arguments.callee.name + "-> Method callback exception: " + e);
+                               alert("Exception removing service " + serviceName + " : " + e);
                        }
                }
        }
@@ -232,72 +293,75 @@ cloudeebus.Service.prototype._searchMethod = function(ifName, method, objectJS)
        }
 
        return funcToCall;
-}
+};
 
-cloudeebus.Service.prototype._addMethod = function(objectPath, ifName, method, objectJS) {
+cloudeebus.Service.prototype._addMethod = function(ifName, method, agent) {
 
        var service = this;
-       var methodId = this.name + "#" + objectPath + "#" + ifName + "#" + method;
-       var funcToCall = this._searchMethod(ifName, method, objectJS);
+       var methodId = this.name + "#" + agent.objectPath + "#" + ifName + "#" + method;
+       var funcToCall = this._searchMethod(ifName, method, agent.jsHdl);
 
        if (funcToCall == null)
                cloudeebus.log("Method " + method + " doesn't exist in Javascript object");
        else {
-               objectJS.wrapperFunc[method] = function() {
+               agent.jsHdl.wrapperFunc[method] = function() {
                        var result;
                        var methodId = arguments[0];
+                       var callDict = {};
+                       // affectation of callDict in eval, otherwise dictionary(='{}') interpreted as block of code by eval
+                       eval("callDict = " + arguments[1]);
                        try {
-                               // affectation of callDict in eval, otherwise dictionary(='{}') interpreted as block of code by eval
-                               eval("var callDict = " + arguments[1]);
-                               result = funcToCall.apply(objectJS, callDict.args);
+                               result = funcToCall.apply(agent.jsHdl, callDict.args);
                                service._returnMethod(methodId, callDict.callIndex, true, result);
                        }
                        catch (e) {
-                               cloudeebus.log(arguments.callee.name + "-> Method callback exception: " + e);
+                               cloudeebus.log("Method " + ifName + "." + method + " call on " + agent.objectPath + " exception: " + e);
                                service._returnMethod(methodId, callDict.callIndex, false, e.message);
                        }
                };
-               this._registerMethod(methodId, objectJS.wrapperFunc[method]);
+               agent.jsHdl.methodId[agent.objectPath].push(methodId);
+               cloudeebus.log("subscribe " + methodId);
+               this.wampSession.subscribe(methodId, agent.jsHdl.wrapperFunc[method]);
        }
 };
 
-cloudeebus.Service.prototype._addSignal = function(objectPath, ifName, signal, objectJS) {
+cloudeebus.Service.prototype._addSignal = function(ifName, signal, agent) {
        var service = this;
        var methodExist = false;
 
-       if (objectJS.interfaceProxies && objectJS.interfaceProxies[ifName])
-               if (objectJS.interfaceProxies[ifName][signal]) {
+       if (agent.jsHdl.interfaceProxies && agent.jsHdl.interfaceProxies[ifName])
+               if (agent.jsHdl.interfaceProxies[ifName][signal]) {
                        methodExist = true;
                } else {
-                       objectJS.interfaceProxies[ifName][signal] = function() {
-                               var result = JSON.parse(arguments[0]);
-                               service.emitSignal(objectPath, signal, result);
+                       agent.jsHdl.interfaceProxies[ifName][signal] = function() {
+                               service._emitSignal(agent.objectPath, signal, arguments[0]);
                        };
                return;
        }
                
-       if ((objectJS[signal] == undefined || objectJS[signal] == null) && !methodExist) 
-               objectJS[signal] = function() {
-                       var result = JSON.parse(arguments[0]);
-                       service.emitSignal(objectPath, signal, result);
+       if ((agent.jsHdl[signal] == undefined || agent.jsHdl[signal] == null) && !methodExist) 
+               agent.jsHdl[signal] = function() {
+                       service.emitSignal(agent.objectPath, signal, arguments[0]);
                };
        else
                cloudeebus.log("Can not create new method to emit signal '" + signal + "' in object JS this method already exist!");
 };
 
-cloudeebus.Service.prototype._createWrapper = function(xmlTemplate, objectPath, objectJS) {
+cloudeebus.Service.prototype._createWrapper = function(agent) {
        var self = this;
        var parser = new DOMParser();
-       var xmlDoc = parser.parseFromString(xmlTemplate, "text/xml");
+       var xmlDoc = parser.parseFromString(agent.xml, "text/xml");
        var ifXml = xmlDoc.getElementsByTagName("interface");
-       objectJS.wrapperFunc = []
+       agent.jsHdl.wrapperFunc = [];
+       agent.jsHdl.methodId = [];
+       agent.jsHdl.methodId[agent.objectPath] = [];
        for (var i=0; i < ifXml.length; i++) {
                var ifName = ifXml[i].attributes.getNamedItem("name").value;
                var ifChild = ifXml[i].firstChild;
                while (ifChild) {
                        if (ifChild.nodeName == "method") {
                                var metName = ifChild.attributes.getNamedItem("name").value;
-                               self._addMethod(objectPath, ifName, metName, objectJS);
+                               self._addMethod(ifName, metName, agent);
                        }
                        if (ifChild.nodeName == "signal") {
                                var metName = ifChild.attributes.getNamedItem("name").value;
@@ -308,60 +372,83 @@ cloudeebus.Service.prototype._createWrapper = function(xmlTemplate, objectPath,
        }
 };
 
-cloudeebus.Service.prototype.addAgent = function(objectPath, xmlTemplate, objectJS, successCB, errorCB) {
+cloudeebus.Service.prototype.addAgent = function(agent, successCB, errorCB) {
        function ServiceAddAgentSuccessCB(objPath) {
                if (successCB) {
-                       try { // calling dbus hook object function for un-translated types
+                       try {
                                successCB(objPath);
                        }
                        catch (e) {
-                               alert(arguments.callee.name + "-> Method callback exception: " + e);
+                               alert("Exception adding agent " + agent.objectPath + " : " + e);
                        }
                }
        }
        
-       try { // calling dbus hook object function for un-translated types
-               this._createWrapper(xmlTemplate, objectPath, objectJS);
+       try {
+               this._createWrapper(agent);
        }
        catch (e) {
-               alert(arguments.callee.name + "-> Method callback exception: " + e);
-               errorCB(e.desc);
+               alert("Exception creating agent wrapper " + agent.objectPath + " : " + e);
+               errorCB(e);
                return;
        }
        
        var arglist = [
-           objectPath,
-           xmlTemplate
+           agent.objectPath,
+           agent.xml
            ];
 
        // call dbusSend with bus type, destination, object, message and arguments
        this.wampSession.call("serviceAddAgent", arglist).then(ServiceAddAgentSuccessCB, errorCB);
 };
 
-cloudeebus.Service.prototype.delAgent = function(objectPath, successCB, errorCB) {
+cloudeebus.Service.prototype._deleteWrapper = function(agent) {
+       var self = this;
+       var objJs = agent.jsHdl;
+       if (objJs.methodId[agent.objectPath]) {
+               for (var idx in objJs.methodId[agent.objectPath]) {
+                       try {
+                               cloudeebus.log("unsubscribe " + objJs.methodId[agent.objectPath][idx]);
+                               this.wampSession.unsubscribe(objJs.methodId[agent.objectPath][idx]);
+                               objJs.methodId[agent.objectPath][idx] = null;
+                       }
+                       catch (e) {
+                               cloudeebus.log("Unsubscribe error: " + e);
+                       }
+               }
+               delete objJs.methodId[agent.objectPath];
+       }
+};
+
+cloudeebus.Service.prototype.delAgent = function(rmAgent, successCB, errorCB) {
        function ServiceDelAgentSuccessCB(agent) {
                if (successCB) {
-                       try { // calling dbus hook object function for un-translated types
+                       try {
                                successCB(agent);
                        }
                        catch (e) {
-                               alert(arguments.callee.name + "-> Method callback exception: " + e);
+                               alert("Exception deleting agent " + rmAgent.objectPath + " : " + e);
+                               errorCB(e);
                        }
                }
        }
+
+       try {
+               this._deleteWrapper(rmAgent);
+       }
+       catch (e) {
+               alert("Exception deleting agent wrapper " + rmAgent.objectPath + " : " + e);
+               errorCB(e);
+       }
        
        var arglist = [
-           objectPath
+           rmAgent.objectPath
            ];
 
        // call dbusSend with bus type, destination, object, message and arguments
        this.wampSession.call("serviceDelAgent", arglist).then(ServiceDelAgentSuccessCB, errorCB);
 };
 
-cloudeebus.Service.prototype._registerMethod = function(methodId, methodHandler) {
-       this.wampSession.subscribe(methodId, methodHandler);
-};
-
 cloudeebus.Service.prototype._returnMethod = function(methodId, callIndex, success, result, successCB, errorCB) {
        var arglist = [
            methodId,
@@ -373,7 +460,7 @@ cloudeebus.Service.prototype._returnMethod = function(methodId, callIndex, succe
        this.wampSession.call("returnMethod", arglist).then(successCB, errorCB);
 };
 
-cloudeebus.Service.prototype.emitSignal = function(objectPath, signalName, result, successCB, errorCB) {
+cloudeebus.Service.prototype._emitSignal = function(objectPath, signalName, result, successCB, errorCB) {
        var arglist = [
            objectPath,
            signalName,
@@ -384,6 +471,269 @@ cloudeebus.Service.prototype.emitSignal = function(objectPath, signalName, resul
 };
 
 
+
+/*****************************************************************************/
+
+function _processWrappers(wrappers, value) {
+       for (var i=0; i<wrappers.length; i++)
+               wrappers[i](value);
+}
+
+
+function _processWrappersAsync(wrappers, value) {
+       var taskid = -1;
+       function processAsyncOnce() {
+               _processWrappers(wrappers, value);
+               clearInterval(taskid);
+       }
+       taskid = setInterval(processAsyncOnce, 200);
+}
+
+
+
+/*****************************************************************************/
+
+cloudeebus.PromiseResolver = function(promise) {
+       this.promise = promise;
+       this.resolved = null;
+    return this;
+};
+
+
+cloudeebus.PromiseResolver.prototype.resolve = function(value, sync) {
+       if (this.resolved)
+               return;
+       
+       var then = (value && value.then && value.then.apply) ? value.then : null;
+       if (then) {
+               var self = this;                
+               var fulfillCallback = function(arg) {
+                       self.resolve(arg, true);
+               };      
+               var rejectCallback = function(arg) {
+                       self.reject(arg, true);
+               };
+               try {
+                       then.apply(value, [fulfillCallback, rejectCallback]);
+               }
+               catch (e) {
+                       this.reject(e, true);
+               }
+       }
+       
+       this.fulfill(value, sync);
+};
+
+
+cloudeebus.PromiseResolver.prototype.fulfill = function(value, sync) {
+       if (this.resolved)
+               return;
+       
+       var promise = this.promise;
+       promise.state = "fulfilled";
+       promise.result = value;
+       
+       this.resolved = true;
+       if (sync)
+               _processWrappers(promise._fulfillWrappers, value);
+       else
+               _processWrappersAsync(promise._fulfillWrappers, value);
+};
+
+
+cloudeebus.PromiseResolver.prototype.reject = function(value, sync) {
+       if (this.resolved)
+               return;
+       
+       var promise = this.promise;
+       promise.state = "rejected";
+       promise.result = value;
+       
+       this.resolved = true;
+       if (sync)
+               _processWrappers(promise._rejectWrappers, value);
+       else
+               _processWrappersAsync(promise._rejectWrappers, value);
+};
+
+
+
+/*****************************************************************************/
+
+cloudeebus.Promise = function(init) {
+       this.state = "pending";
+       this.result = null;
+       this._fulfillWrappers = [];
+       this._rejectWrappers = [];
+       this.resolver = new cloudeebus.PromiseResolver(this);
+       if (init) {
+               try {
+                       init.apply(this, [this.resolver]);
+               }
+               catch (e) {
+                       this.resolver.reject(e, true);
+               }
+       }
+    return this;
+};
+
+
+cloudeebus.Promise.prototype.appendWrappers = function(fulfillWrapper, rejectWrapper) {
+       if (fulfillWrapper)
+               this._fulfillWrappers.push(fulfillWrapper);
+       if (rejectWrapper)
+               this._rejectWrappers.push(rejectWrapper);
+       if (this.state == "fulfilled")
+               _processWrappersAsync(this._fulfillWrappers, this.result);
+       if (this.state == "rejected")
+               _processWrappersAsync(this._rejectWrappers, this.result);
+};
+
+
+cloudeebus.Promise.prototype.then = function(fulfillCB, rejectCB) {
+       var promise = new cloudeebus.Promise();
+       var resolver = promise.resolver;
+       var fulfillWrapper, rejectWrapper;
+       
+       if (fulfillCB)
+               fulfillWrapper = function(arg) {
+                       try {
+                               var value = fulfillCB.apply(promise, [arg]);
+                               resolver.resolve(value, true);
+                       }
+                       catch (e) {
+                               resolver.reject(e, true);
+                       }
+               };
+       else
+               fulfillWrapper = function(arg) {
+                       resolver.fulfill(arg, true);
+               };
+       
+       if (rejectCB)
+               rejectWrapper = function(arg) {
+                       try {
+                               var value = rejectCB.apply(promise, [arg]);
+                               resolver.resolve(value, true);
+                       }
+                       catch (e) {
+                               resolver.reject(e, true);
+                       }
+               };
+       else
+               rejectWrapper = function(arg) {
+                       resolver.reject(arg, true);
+               };
+       
+       this.appendWrappers(fulfillWrapper,rejectWrapper);
+       return promise;
+};
+
+
+cloudeebus.Promise.prototype["catch"] = function(rejectCB) {
+       return this.then(undefined,rejectCB);
+};
+
+
+cloudeebus.Promise.prototype.done = function(fulfillCB, rejectCB) {
+       this.appendWrappers(fulfillCB,rejectCB);
+};
+
+
+cloudeebus.Promise.resolve = function(value) {
+       var promise = new cloudeebus.Promise();
+       promise.resolver.resolve(value);
+       return promise;
+};
+
+
+cloudeebus.Promise.fulfill = function(value) {
+       var promise = new cloudeebus.Promise();
+       promise.resolver.fulfill(value);
+       return promise;
+};
+
+
+cloudeebus.Promise.reject = function(value) {
+       var promise = new cloudeebus.Promise();
+       promise.resolver.reject(value);
+       return promise;
+};
+
+
+cloudeebus.Promise.any = function() {
+       var promise = new cloudeebus.Promise();
+       var resolver = promise.resolver;
+       var fulfillCallback = function(arg) {
+               resolver.resolve(arg, true);
+       };
+       var rejectCallback = function(arg) {
+               resolver.reject(arg, true);
+       };
+       if (arguments.length == 0)
+               resolver.resolve(undefined, true);
+       else
+               for (i in arguments) 
+                       Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
+       return promise;
+};
+
+
+cloudeebus.Promise.every = function() {
+       var promise = new cloudeebus.Promise();
+       var resolver = promise.resolver;
+       var index = 0;
+       var countdown = arguments.length;
+       var args = new Array(countdown);
+       var rejectCallback = function(arg) {
+               resolver.reject(arg, true);
+       };
+       if (arguments.length == 0)
+               resolver.resolve(undefined, true);
+       else
+               for (i in arguments) {
+                       var fulfillCallback = function(arg) {
+                               args[index] = arg;
+                               countdown--;
+                               if (countdown == 0)
+                                       resolver.resolve(args, true);
+                       };
+                       index++;
+                       Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
+               }
+       
+       return promise;
+};
+
+
+cloudeebus.Promise.some = function() {
+       var promise = new cloudeebus.Promise();
+       var resolver = promise.resolver;
+       var index = 0;
+       var countdown = arguments.length;
+       var args = new Array(countdown);
+       var fulfillCallback = function(arg) {
+               resolver.resolve(arg, true);
+       };
+       if (arguments.length == 0)
+               resolver.resolve(undefined, true);
+       else
+               for (i in arguments) {
+                       var rejectCallback = function(arg) {
+                               args[index] = arg;
+                               countdown--;
+                               if (countdown == 0)
+                                       resolver.reject(args, true);
+                       };
+                       index++;
+                       Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
+               }
+       
+       return promise;
+};
+
+
+
 /*****************************************************************************/
 
 cloudeebus.ProxyObject = function(session, busConnection, busName, objectPath) {
@@ -417,8 +767,7 @@ cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
                if (self.propInterfaces.length > 0) 
                        self.callMethod("org.freedesktop.DBus.Properties", 
                                "GetAll", 
-                               [self.propInterfaces[self.propInterfaces.length-1]], 
-                               getAllPropertiesSuccessCB, 
+                               [self.propInterfaces[self.propInterfaces.length-1]]).then(getAllPropertiesSuccessCB, 
                                errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
                else {
                        self.propInterfaces = null;
@@ -443,17 +792,20 @@ cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
                        while (ifChild) {
                                if (ifChild.nodeName == "method") {
                                        var nArgs = 0;
+                                       var signature = "";
                                        var metChild = ifChild.firstChild;
                                        while (metChild) {
                                                if (metChild.nodeName == "arg" &&
-                                                       metChild.attributes.getNamedItem("direction").value == "in")
+                                                       metChild.attributes.getNamedItem("direction").value == "in") {
+                                                               signature += metChild.attributes.getNamedItem("type").value;
                                                                nArgs++;
+                                               }
                                                metChild = metChild.nextSibling;
                                        }
                                        var metName = ifChild.attributes.getNamedItem("name").value;
                                        if (!self[metName])
-                                               self._addMethod(ifName, metName, nArgs);
-                                       self.interfaceProxies[ifName]._addMethod(ifName, metName, nArgs);
+                                               self._addMethod(ifName, metName, nArgs, signature);
+                                       self.interfaceProxies[ifName]._addMethod(ifName, metName, nArgs, signature);
                                }
                                else if (ifChild.nodeName == "property") {
                                        if (!hasProperties)
@@ -466,8 +818,7 @@ cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
                if (supportDBusProperties && self.propInterfaces.length > 0) {
                        self.callMethod("org.freedesktop.DBus.Properties", 
                                "GetAll", 
-                               [self.propInterfaces[self.propInterfaces.length-1]], 
-                               getAllPropertiesSuccessCB, 
+                               [self.propInterfaces[self.propInterfaces.length-1]]).then(getAllPropertiesSuccessCB, 
                                errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
                }
                else {
@@ -478,77 +829,69 @@ cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
        }
 
        // call Introspect on self
-       self.callMethod("org.freedesktop.DBus.Introspectable", "Introspect", []introspectSuccessCB, errorCB);
+       self.callMethod("org.freedesktop.DBus.Introspectable", "Introspect", []).then(introspectSuccessCB, errorCB);
 };
 
 
-cloudeebus.ProxyObject.prototype._addMethod = function(ifName, method, nArgs) {
+cloudeebus.ProxyObject.prototype._addMethod = function(ifName, method, nArgs, signature) {
 
        var self = this;
        
        self[method] = function() {
-               if (arguments.length < nArgs || arguments.length > nArgs + 2)
-                       throw "Error: method " + method + " takes " + nArgs + " parameters, got " + arguments.length + ".";
                var args = [];
-               var successCB = null;
-               var errorCB = null;
                for (var i=0; i < nArgs; i++ )
                        args.push(arguments[i]);
-               if (arguments.length > nArgs)
-                       successCB = arguments[nArgs];
-               if (arguments.length > nArgs + 1)
-                       errorCB = arguments[nArgs + 1];
-               self.callMethod(ifName, method, args, successCB, errorCB);
-       };
-       
+               return self.callMethod(ifName, method, args, signature);
+       };      
 };
 
 
-cloudeebus.ProxyObject.prototype.callMethod = function(ifName, method, args, successCB, errorCB) {
+cloudeebus.ProxyObject.prototype.callMethod = function(ifName, method, args, signature) {
        
-       var self = this; 
-
-       function callMethodSuccessCB(str) {
-               if (successCB) {
+       var self = this;
+       
+       var promise = new cloudeebus.Promise(function (resolver) {
+               function callMethodSuccessCB(str) {
                        try { // calling dbus hook object function for un-translated types
-                               successCB.apply(self, eval(str));
+                               var result = eval(str);
+                               resolver.fulfill(result[0], true);
                        }
                        catch (e) {
                                cloudeebus.log("Method callback exception: " + e);
-                               if (errorCB)
-                                       errorCB(e);
+                               resolver.reject(e, true);
                        }
                }
-       }
 
-       function callMethodErrorCB(error) {
-               cloudeebus.log("Error calling method: " + method + " on object: " + self.objectPath + " : " + error.desc);
-               if (errorCB)
-                       errorCB(error.desc);
-       }
-
-       var arglist = [
-               self.busConnection.name,
-               self.busName,
-               self.objectPath,
-               ifName,
-               method,
-               JSON.stringify(args)
-       ];
+               function callMethodErrorCB(error) {
+                       cloudeebus.log("Error calling method: " + method + " on object: " + self.objectPath + " : " + cloudeebus.getError(error));
+                       resolver.reject(cloudeebus.getError(error), true);
+               }
 
-       // call dbusSend with bus type, destination, object, message and arguments
-       self.wampSession.call("dbusSend", arglist).then(callMethodSuccessCB, callMethodErrorCB);
+               var arglist = [
+                       self.busConnection.name,
+                       self.busName,
+                       self.objectPath,
+                       ifName,
+                       method,
+                       JSON.stringify(args)
+               ];
+
+               // call dbusSend with bus type, destination, object, message and arguments
+               self.wampSession.call("dbusSend", arglist).then(callMethodSuccessCB, callMethodErrorCB);
+       });
+       
+       return promise;
 };
 
 
-cloudeebus.ProxyObject.prototype.connectToSignal = function(ifName, signal, successCB, errorCB) {
+cloudeebus.ProxyObject.prototype.connectToSignal = function(ifName, signal, handlerCB, errorCB) {
        
        var self = this; 
 
        function signalHandler(id, data) {
-               if (successCB) {
+               if (handlerCB) {
                        try { // calling dbus hook object function for un-translated types
-                               successCB.apply(self, eval(data));
+                               handlerCB.apply(self, eval(data));
                        }
                        catch (e) {
                                cloudeebus.log("Signal handler exception: " + e);
@@ -568,9 +911,9 @@ cloudeebus.ProxyObject.prototype.connectToSignal = function(ifName, signal, succ
        }
 
        function connectToSignalErrorCB(error) {
-               cloudeebus.log("Error connecting to signal: " + signal + " on object: " + self.objectPath + " : " + error.desc);
+               cloudeebus.log("Error connecting to signal: " + signal + " on object: " + self.objectPath + " : " + cloudeebus.getError(error));
                if (errorCB)
-                       errorCB(error.desc);
+                       errorCB(cloudeebus.getError(error));
        }
 
        var arglist = [