cloudeebus/cloudeebus.js

   1 /******************************************************************************
   2  * Copyright 2012 Intel Corporation.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *****************************************************************************/
  16
  17
  18
  19 /*****************************************************************************/
  20
  21 var dbus = { // hook object for dbus types not translated by python-json
  22                 Double: function(value, level) {
  23                         return value;
  24                 }
  25 };
  26
  27
  28
  29 /*****************************************************************************/
  30
  31 var cloudeebus = window.cloudeebus = {
  32                 version: "0.5.99",
  33                 minVersion: "0.3.2"
  34 };
  35
  36 cloudeebus.reset = function() {
  37         cloudeebus.sessionBus = null;
  38         cloudeebus.systemBus = null;
  39         cloudeebus.wampSession = null;
  40         cloudeebus.uri = null;
  41 };
  42
  43
  44 cloudeebus.log = function(msg) {
  45 };
  46
  47 cloudeebus.getError = function(error) {
  48         if (error.desc && error.uri)
  49                 return error.desc + " : " + error.uri; // Python exception (cloudeebus.py)
  50         if (error.desc)
  51                 return error.desc;
  52         if (error.uri)
  53                 return error.uri;
  54         if (error.name && error.message)
  55                 return error.name + " : " + error.message; // Javascript exception
  56         if (error.message)
  57                 return error.message;
  58         if (error.name)
  59                 return error.name;
  60         return error; // Autobahn error
  61 };
  62
  63 cloudeebus.versionCheck = function(version) {
  64         var ver = version.split(".");
  65         var min = cloudeebus.minVersion.split(".");
  66         for (var i=0; i<ver.length; i++) {
  67                 if (Number(ver[i]) > Number(min[i]))
  68                         return true;
  69                 if (Number(ver[i]) < Number(min[i]))
  70                         return false;
  71         }
  72         return true;
  73 };
  74
  75
  76 cloudeebus.connect = function(uri, manifest, successCB, errorCB) {
  77         cloudeebus.reset();
  78         cloudeebus.uri = uri;
  79
  80         function onCloudeebusVersionCheckCB(version) {
  81                 if (cloudeebus.versionCheck(version)) {
  82                         cloudeebus.log("Connected to " + cloudeebus.uri);
  83                         if (successCB)
  84                                 successCB();
  85                 } else {
  86                         var errorMsg = "Cloudeebus server version " + version + " unsupported, need version " + cloudeebus.minVersion + " or superior";
  87                         cloudeebus.log(errorMsg);
  88                         if (errorCB)
  89                                 errorCB(errorMsg);
  90                 }
  91         }
  92
  93         function onWAMPSessionAuthErrorCB(error) {
  94                 var errorStr = cloudeebus.getError(error);
  95                 cloudeebus.log("Authentication error: " + errorStr);
  96                 if (errorCB)
  97                         errorCB(errorStr);
  98         }
  99
 100         function onWAMPSessionAuthenticatedCB(permissions) {
 101                 cloudeebus.sessionBus = new cloudeebus.BusConnection("session", cloudeebus.wampSession);
 102                 cloudeebus.systemBus = new cloudeebus.BusConnection("system", cloudeebus.wampSession);
 103                 cloudeebus.wampSession.call("getVersion").then(onCloudeebusVersionCheckCB, errorCB);
 104         }
 105
 106         function onWAMPSessionChallengedCB(challenge) {
 107                 var signature = cloudeebus.wampSession.authsign(challenge, manifest.key);
 108                 cloudeebus.wampSession.auth(signature).then(onWAMPSessionAuthenticatedCB, onWAMPSessionAuthErrorCB);
 109         }
 110
 111         function onWAMPSessionConnectedCB(session) {
 112                 cloudeebus.wampSession = session;
 113                 if (manifest)
 114                         cloudeebus.wampSession.authreq(
 115                                         manifest.name,
 116                                         {permissions: manifest.permissions,
 117                                                  services: manifest.services}
 118                                 ).then(onWAMPSessionChallengedCB, onWAMPSessionAuthErrorCB);
 119                 else
 120                         cloudeebus.wampSession.authreq().then(function() {
 121                                 cloudeebus.wampSession.auth().then(onWAMPSessionAuthenticatedCB, onWAMPSessionAuthErrorCB);
 122                                 }, onWAMPSessionAuthErrorCB);
 123         }
 124
 125         function onWAMPSessionErrorCB(code, reason) {
 126                 if (code == ab.CONNECTION_UNSUPPORTED) {
 127                         cloudeebus.log("Browser is not supported");
 128                 }
 129                 else {
 130                         cloudeebus.log("Failed to open session, code = " + code + ", reason = " + reason);
 131                 }
 132                 if (errorCB)
 133                         errorCB(reason);
 134         }
 135
 136         return ab.connect(cloudeebus.uri, onWAMPSessionConnectedCB, onWAMPSessionErrorCB);
 137 };
 138
 139
 140 cloudeebus.SessionBus = function() {
 141         return cloudeebus.sessionBus;
 142 };
 143
 144
 145 cloudeebus.SystemBus = function() {
 146         return cloudeebus.systemBus;
 147 };
 148
 149
 150
 151 /*****************************************************************************/
 152
 153 cloudeebus.BusConnection = function(name, session) {
 154         this.name = name;
 155         this.wampSession = session;
 156         return this;
 157 };
 158
 159
 160 cloudeebus.BusConnection.prototype.getObject = function(busName, objectPath, introspectCB, errorCB) {
 161         var proxy = new cloudeebus.ProxyObject(this.wampSession, this, busName, objectPath);
 162         if (introspectCB)
 163                 proxy._introspect(introspectCB, errorCB);
 164         return proxy;
 165 };
 166
 167
 168 cloudeebus.BusConnection.prototype.addService = function(serviceName) {
 169         var self = this;
 170
 171         if (!serviceName)
 172                 serviceName = "";
 173
 174         var promise = new cloudeebus.Promise(function (resolver) {
 175                 var cloudeebusService = new cloudeebus.Service(self.wampSession, self, serviceName);
 176
 177                 function ServiceAddedSuccessCB(serviceName) {
 178                         try {
 179                                 cloudeebusService.isCreated = true;
 180                                 resolver.fulfill(cloudeebusService, true);
 181                         }
 182                         catch (e) {
 183                                 var errorStr = cloudeebus.getError(e);
 184                                 cloudeebus.log("Method callback exception: " + errorStr);
 185                                 resolver.reject(errorStr, true);
 186                         }
 187                 }
 188
 189                 function ServiceAddedErrorCB(error) {
 190                         var errorStr = cloudeebus.getError(error);
 191                         cloudeebus.log("Error adding service method: " + self.name + ", error: " + errorStr);
 192                         resolver.reject(errorStr, true);
 193                 }
 194
 195                 var arglist = [
 196                     self.name,
 197                     serviceName
 198                     ];
 199
 200                 // call dbusSend with bus type, destination, object, message and arguments
 201                 self.wampSession.call("serviceAdd", arglist).then(ServiceAddedSuccessCB, ServiceAddedErrorCB);
 202         });
 203
 204         return promise;
 205 };
 206
 207
 208
 209 /*****************************************************************************/
 210 //Generic definition for an agent. An agent needs :
 211 //srvDbusName : the DBus parent service
 212 //objPath : a DBus path to access it
 213 //jsHdl : a Javascript handler to process methods,
 214 //xml : the xml which describe interface/methods/signals...
 215 cloudeebus.Agent = function(srvDbusName, objPath, jsHdl, xml) {
 216         this.srvName = srvDbusName;
 217         this.xml = xml;
 218         this.objectPath = objPath;
 219         this.jsHdl = jsHdl;
 220         return this;
 221 };
 222
 223
 224 cloudeebus.Service = function(session, busConnection, name) {
 225         this.wampSession = session;
 226         this.busConnection = busConnection;
 227         this.name = name;
 228         this.agents = [];
 229         this.isCreated = false;
 230         return this;
 231 };
 232
 233
 234 cloudeebus.Service.prototype.remove = function() {
 235         var self = this;
 236
 237         var promise = new cloudeebus.Promise(function (resolver) {
 238                 function ServiceRemovedSuccessCB(serviceName) {
 239                         try {
 240                                 resolver.fulfill(serviceName, true);
 241                         }
 242                         catch (e) {
 243                                 var errorStr = cloudeebus.getError(e);
 244                                 cloudeebus.log("Method callback exception: " + errorStr);
 245                                 resolver.reject(errorStr, true);
 246                         }
 247                 }
 248
 249                 function ServiceRemovedErrorCB(error) {
 250                         var errorStr = cloudeebus.getError(error);
 251                         resolver.reject(errorStr, true);
 252                 }
 253
 254                 var arglist = [
 255                     self.name
 256                     ];
 257
 258                 // call dbusSend with bus type, destination, object, message and arguments
 259                 self.wampSession.call("serviceRelease", arglist).then(ServiceRemovedSuccessCB, ServiceRemovedErrorCB);
 260         });
 261
 262         return promise;
 263 };
 264
 265
 266 cloudeebus.Service.prototype._searchMethod = function(ifName, method, objectJS) {
 267
 268         var funcToCall = null;
 269
 270         // Check if 'objectJS' has a member 'interfaceProxies' with an interface named 'ifName'
 271         // and a method named 'method'
 272         if (objectJS.interfaceProxies && objectJS.interfaceProxies[ifName] &&
 273                 objectJS.interfaceProxies[ifName][method]) {
 274                 funcToCall = objectJS.interfaceProxies[ifName][method];
 275         } else {
 276                 // retrieve the method directly from 'root' of objectJs
 277                 funcToCall = objectJS[method];
 278         }
 279
 280         return funcToCall;
 281 };
 282
 283
 284 cloudeebus.Service.prototype._addMethod = function(ifName, method, agent) {
 285
 286         var service = this;
 287         var methodId = this.name + "#" + agent.objectPath + "#" + ifName + "#" + method;
 288         var funcToCall = this._searchMethod(ifName, method, agent.jsHdl);
 289
 290         if (funcToCall == null)
 291                 cloudeebus.log("Method " + method + " doesn't exist in Javascript object");
 292         else {
 293                 agent.jsHdl.wrapperFunc[method] = function() {
 294                         var result;
 295                         var methodId = arguments[0];
 296                         var callDict = {};
 297                         // affectation of callDict in eval, otherwise dictionary(='{}') interpreted as block of code by eval
 298                         eval("callDict = " + arguments[1]);
 299                         try {
 300                                 result = funcToCall.apply(agent.jsHdl, callDict.args);
 301                                 service._returnMethod(methodId, callDict.callIndex, true, result);
 302                         }
 303                         catch (e) {
 304                                 var errorStr = cloudeebus.getError(e);
 305                                 cloudeebus.log("Method " + ifName + "." + method + " call on " + agent.objectPath + " exception: " + errorStr);
 306                                 service._returnMethod(methodId, callDict.callIndex, false, errorStr);
 307                         }
 308                 };
 309                 agent.jsHdl.methodId[agent.objectPath].push(methodId);
 310                 this.wampSession.subscribe(methodId, agent.jsHdl.wrapperFunc[method]);
 311         }
 312 };
 313
 314
 315 cloudeebus.Service.prototype._addSignal = function(ifName, signal, agent) {
 316         var service = this;
 317         var methodExist = false;
 318
 319         if (agent.jsHdl.interfaceProxies && agent.jsHdl.interfaceProxies[ifName])
 320                 if (agent.jsHdl.interfaceProxies[ifName][signal]) {
 321                         methodExist = true;
 322                 } else {
 323                         agent.jsHdl.interfaceProxies[ifName][signal] = function() {
 324                                 service._emitSignal(agent.objectPath, signal, arguments[0]);
 325                         };
 326                 return;
 327         }
 328
 329         if ((agent.jsHdl[signal] == undefined || agent.jsHdl[signal] == null) && !methodExist)
 330                 agent.jsHdl[signal] = function() {
 331                         service._emitSignal(agent.objectPath, signal, arguments[0]);
 332                 };
 333         else
 334                 cloudeebus.log("Can not create new method to emit signal '" + signal + "' in object JS this method already exist!");
 335 };
 336
 337
 338 cloudeebus.Service.prototype._createWrapper = function(agent) {
 339         var self = this;
 340         var parser = new DOMParser();
 341         var xmlDoc = parser.parseFromString(agent.xml, "text/xml");
 342         var ifXml = xmlDoc.getElementsByTagName("interface");
 343         agent.jsHdl.wrapperFunc = {};
 344         agent.jsHdl.methodId = {};
 345         agent.jsHdl.methodId[agent.objectPath] = [];
 346         for (var i=0; i < ifXml.length; i++) {
 347                 var ifName = ifXml[i].attributes.getNamedItem("name").value;
 348                 var ifChild = ifXml[i].firstChild;
 349                 while (ifChild) {
 350                         if (ifChild.nodeName == "method") {
 351                                 var metName = ifChild.attributes.getNamedItem("name").value;
 352                                 self._addMethod(ifName, metName, agent);
 353                         }
 354                         if (ifChild.nodeName == "signal") {
 355                                 var metName = ifChild.attributes.getNamedItem("name").value;
 356                                 self._addSignal(ifName, metName, agent);
 357                         }
 358                         ifChild = ifChild.nextSibling;
 359                 }
 360         }
 361 };
 362
 363
 364 cloudeebus.Service.prototype.addAgent = function(agent) {
 365         var self = this;
 366
 367         var promise = new cloudeebus.Promise(function (resolver) {
 368                 function ServiceAddAgentSuccessCB(objPath) {
 369                         try {
 370                                 self.agents.push(agent);
 371                                 resolver.fulfill(objPath, true);
 372                         }
 373                         catch (e) {
 374                                 var errorStr = cloudeebus.getError(e);
 375                                 cloudeebus.log("Method callback exception: " + errorStr);
 376                                 resolver.reject(errorStr, true);
 377                         }
 378                 }
 379
 380                 function ServiceAddAgenterrorCB(error) {
 381                         var errorStr = cloudeebus.getError(error);
 382                         cloudeebus.log("Error adding agent : " + agent.objectPath + ", error: " + errorStr);
 383                         self.promise.resolver.reject(errorStr, true);
 384                 }
 385
 386                 try {
 387                         self._createWrapper(agent);
 388                 }
 389                 catch (e) {
 390                         var errorStr = cloudeebus.getError(e);
 391                         cloudeebus.log("Exception creating agent wrapper " + agent.objectPath + " : " + errorStr);
 392                         resolver.reject(errorStr, true);
 393                         return;
 394                 }
 395
 396                 var arglist = [
 397                     agent.objectPath,
 398                     agent.xml
 399                     ];
 400
 401                 // call dbusSend with bus type, destination, object, message and arguments
 402                 self.wampSession.call("serviceAddAgent", arglist).then(ServiceAddAgentSuccessCB, ServiceAddAgenterrorCB);
 403         });
 404
 405         return promise;
 406 };
 407
 408
 409 cloudeebus.Service.prototype._deleteWrapper = function(agent) {
 410         var objJs = agent.jsHdl;
 411         if (objJs.methodId[agent.objectPath]) {
 412                 while (objJs.methodId[agent.objectPath].length) {
 413                         try {
 414                                 this.wampSession.unsubscribe( objJs.methodId[agent.objectPath].pop() );
 415                         }
 416                         catch (e) {
 417                                 cloudeebus.log("Unsubscribe error: " + cloudeebus.getError(e));
 418                         }
 419                 }
 420                 objJs.methodId[agent.objectPath] = null;
 421         }
 422 };
 423
 424
 425 cloudeebus.Service.prototype.removeAgent = function(rmAgent) {
 426         var self = this;
 427
 428         var promise = new cloudeebus.Promise(function (resolver) {
 429                 function ServiceRemoveAgentSuccessCB(objectPath) {
 430                         // Searching agent in list
 431                         for (var idx in self.agents)
 432                                 if (self.agents[idx].objectPath == objectPath) {
 433                                         agent = self.agents[idx];
 434                                         break;
 435                                 }
 436
 437                         try {
 438                                 self.agents.splice(idx, 1);
 439                                 self._deleteWrapper(agent);
 440                                 resolver.fulfill(agent, true);
 441                         }
 442                         catch (e) {
 443                                 var errorStr = cloudeebus.getError(e);
 444                                 cloudeebus.log("Method callback exception: " + errorStr);
 445                                 resolver.reject(errorStr, true);
 446                         }
 447                 }
 448
 449                 function ServiceRemoveAgentErrorCB(error) {
 450                         var errorStr = cloudeebus.getError(error);
 451                         cloudeebus.log("Error removing agent : " + rmAgent.objectPath + ", error: " + errorStr);
 452                         resolver.reject(errorStr, true);
 453                 }
 454
 455                 var arglist = [
 456                     rmAgent.objectPath
 457                     ];
 458
 459                 // call dbusSend with bus type, destination, object, message and arguments
 460                 self.wampSession.call("serviceDelAgent", arglist).then(ServiceRemoveAgentSuccessCB, ServiceRemoveAgentErrorCB);
 461         });
 462
 463         return promise;
 464 };
 465
 466
 467 cloudeebus.Service.prototype._returnMethod = function(methodId, callIndex, success, result, successCB, errorCB) {
 468         var arglist = [
 469             methodId,
 470             callIndex,
 471             success,
 472             result
 473             ];
 474
 475         this.wampSession.call("returnMethod", arglist).then(successCB, errorCB);
 476 };
 477
 478
 479 cloudeebus.Service.prototype._emitSignal = function(objectPath, signalName, result, successCB, errorCB) {
 480         var arglist = [
 481             objectPath,
 482             signalName,
 483             result
 484             ];
 485
 486         this.wampSession.call("emitSignal", arglist).then(successCB, errorCB);
 487 };
 488
 489
 490
 491 /*****************************************************************************/
 492
 493 function _processWrappers(wrappers, value) {
 494         for (var i=0; i<wrappers.length; i++)
 495                 wrappers[i](value);
 496 }
 497
 498
 499 function _processWrappersAsync(wrappers, value) {
 500         var taskid = -1;
 501         function processAsyncOnce() {
 502                 _processWrappers(wrappers, value);
 503                 clearInterval(taskid);
 504         }
 505         taskid = setInterval(processAsyncOnce, 200);
 506 }
 507
 508
 509
 510 /*****************************************************************************/
 511
 512 cloudeebus.PromiseResolver = function(promise) {
 513         this.promise = promise;
 514         this.resolved = null;
 515     return this;
 516 };
 517
 518
 519 cloudeebus.PromiseResolver.prototype.resolve = function(value, sync) {
 520         if (this.resolved)
 521                 return;
 522
 523         var then = (value && value.then && value.then.apply) ? value.then : null;
 524         if (then) {
 525                 var self = this;
 526                 var fulfillCallback = function(arg) {
 527                         self.resolve(arg, true);
 528                 };
 529                 var rejectCallback = function(arg) {
 530                         self.reject(arg, true);
 531                 };
 532                 try {
 533                         then.apply(value, [fulfillCallback, rejectCallback]);
 534                 }
 535                 catch (e) {
 536                         this.reject(cloudeebus.getError(e), true);
 537                 }
 538         }
 539
 540         this.fulfill(value, sync);
 541 };
 542
 543
 544 cloudeebus.PromiseResolver.prototype.fulfill = function(value, sync) {
 545         if (this.resolved)
 546                 return;
 547
 548         var promise = this.promise;
 549         promise.state = "fulfilled";
 550         promise.result = value;
 551
 552         this.resolved = true;
 553         if (sync)
 554                 _processWrappers(promise._fulfillWrappers, value);
 555         else
 556                 _processWrappersAsync(promise._fulfillWrappers, value);
 557 };
 558
 559
 560 cloudeebus.PromiseResolver.prototype.reject = function(value, sync) {
 561         if (this.resolved)
 562                 return;
 563
 564         var promise = this.promise;
 565         promise.state = "rejected";
 566         promise.result = value;
 567
 568         this.resolved = true;
 569         if (sync)
 570                 _processWrappers(promise._rejectWrappers, value);
 571         else
 572                 _processWrappersAsync(promise._rejectWrappers, value);
 573 };
 574
 575
 576
 577 /*****************************************************************************/
 578
 579 cloudeebus.Promise = function(init) {
 580         this.state = "pending";
 581         this.result = null;
 582         this._fulfillWrappers = [];
 583         this._rejectWrappers = [];
 584         this.resolver = new cloudeebus.PromiseResolver(this);
 585         if (init) {
 586                 try {
 587                         init.apply(this, [this.resolver]);
 588                 }
 589                 catch (e) {
 590                         this.resolver.reject(cloudeebus.getError(e), true);
 591                 }
 592         }
 593     return this;
 594 };
 595
 596
 597 cloudeebus.Promise.prototype.appendWrappers = function(fulfillWrapper, rejectWrapper) {
 598         if (fulfillWrapper)
 599                 this._fulfillWrappers.push(fulfillWrapper);
 600         if (rejectWrapper)
 601                 this._rejectWrappers.push(rejectWrapper);
 602         if (this.state == "fulfilled")
 603                 _processWrappersAsync(this._fulfillWrappers, this.result);
 604         if (this.state == "rejected")
 605                 _processWrappersAsync(this._rejectWrappers, this.result);
 606 };
 607
 608
 609 cloudeebus.Promise.prototype.then = function(fulfillCB, rejectCB) {
 610         var promise = new cloudeebus.Promise();
 611         var resolver = promise.resolver;
 612         var fulfillWrapper, rejectWrapper;
 613
 614         if (fulfillCB)
 615                 fulfillWrapper = function(arg) {
 616                         try {
 617                                 var value = fulfillCB.apply(promise, [arg]);
 618                                 resolver.resolve(value, true);
 619                         }
 620                         catch (e) {
 621                                 resolver.reject(cloudeebus.getError(e), true);
 622                         }
 623                 };
 624         else
 625                 fulfillWrapper = function(arg) {
 626                         resolver.fulfill(arg, true);
 627                 };
 628
 629         if (rejectCB)
 630                 rejectWrapper = function(arg) {
 631                         try {
 632                                 var value = rejectCB.apply(promise, [arg]);
 633                                 resolver.resolve(value, true);
 634                         }
 635                         catch (e) {
 636                                 resolver.reject(cloudeebus.getError(e), true);
 637                         }
 638                 };
 639         else
 640                 rejectWrapper = function(arg) {
 641                         resolver.reject(arg, true);
 642                 };
 643
 644         this.appendWrappers(fulfillWrapper,rejectWrapper);
 645         return promise;
 646 };
 647
 648
 649 cloudeebus.Promise.prototype["catch"] = function(rejectCB) {
 650         return this.then(undefined,rejectCB);
 651 };
 652
 653
 654 cloudeebus.Promise.prototype.done = function(fulfillCB, rejectCB) {
 655         this.appendWrappers(fulfillCB,rejectCB);
 656 };
 657
 658
 659 cloudeebus.Promise.resolve = function(value) {
 660         var promise = new cloudeebus.Promise();
 661         promise.resolver.resolve(value);
 662         return promise;
 663 };
 664
 665
 666 cloudeebus.Promise.fulfill = function(value) {
 667         var promise = new cloudeebus.Promise();
 668         promise.resolver.fulfill(value);
 669         return promise;
 670 };
 671
 672
 673 cloudeebus.Promise.reject = function(value) {
 674         var promise = new cloudeebus.Promise();
 675         promise.resolver.reject(value);
 676         return promise;
 677 };
 678
 679
 680 cloudeebus.Promise.any = function() {
 681         var promise = new cloudeebus.Promise();
 682         var resolver = promise.resolver;
 683         var fulfillCallback = function(arg) {
 684                 resolver.resolve(arg, true);
 685         };
 686         var rejectCallback = function(arg) {
 687                 resolver.reject(arg, true);
 688         };
 689         if (arguments.length == 0)
 690                 resolver.resolve(undefined, true);
 691         else
 692                 for (i in arguments)
 693                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 694         return promise;
 695 };
 696
 697
 698 cloudeebus.Promise.every = function() {
 699         var promise = new cloudeebus.Promise();
 700         var resolver = promise.resolver;
 701         var index = 0;
 702         var countdown = arguments.length;
 703         var args = new Array(countdown);
 704         var rejectCallback = function(arg) {
 705                 resolver.reject(arg, true);
 706         };
 707         if (arguments.length == 0)
 708                 resolver.resolve(undefined, true);
 709         else
 710                 for (i in arguments) {
 711                         var fulfillCallback = function(arg) {
 712                                 args[index] = arg;
 713                                 countdown--;
 714                                 if (countdown == 0)
 715                                         resolver.resolve(args, true);
 716                         };
 717                         index++;
 718                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 719                 }
 720
 721         return promise;
 722 };
 723
 724
 725 cloudeebus.Promise.some = function() {
 726         var promise = new cloudeebus.Promise();
 727         var resolver = promise.resolver;
 728         var index = 0;
 729         var countdown = arguments.length;
 730         var args = new Array(countdown);
 731         var fulfillCallback = function(arg) {
 732                 resolver.resolve(arg, true);
 733         };
 734         if (arguments.length == 0)
 735                 resolver.resolve(undefined, true);
 736         else
 737                 for (i in arguments) {
 738                         var rejectCallback = function(arg) {
 739                                 args[index] = arg;
 740                                 countdown--;
 741                                 if (countdown == 0)
 742                                         resolver.reject(args, true);
 743                         };
 744                         index++;
 745                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 746                 }
 747
 748         return promise;
 749 };
 750
 751
 752
 753 /*****************************************************************************/
 754
 755 cloudeebus.ProxyObject = function(session, busConnection, busName, objectPath) {
 756         this.wampSession = session;
 757         this.busConnection = busConnection;
 758         this.busName = busName;
 759         this.objectPath = objectPath;
 760         this.interfaceProxies = {};
 761         return this;
 762 };
 763
 764
 765 cloudeebus.ProxyObject.prototype.getInterface = function(ifName) {
 766         return this.interfaceProxies[ifName];
 767 };
 768
 769
 770 cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
 771
 772         var self = this;
 773
 774         function getAllPropertiesSuccessCB(props) {
 775                 var ifProxy = self.interfaceProxies[self.propInterfaces[self.propInterfaces.length-1]];
 776                 for (var prop in props)
 777                         ifProxy[prop] = self[prop] = props[prop];
 778                 getAllPropertiesNextInterfaceCB();
 779         }
 780
 781         function getAllPropertiesNextInterfaceCB() {
 782                 self.propInterfaces.pop();
 783                 if (self.propInterfaces.length > 0)
 784                         self.callMethod("org.freedesktop.DBus.Properties",
 785                                 "GetAll",
 786                                 [self.propInterfaces[self.propInterfaces.length-1]]).then(getAllPropertiesSuccessCB,
 787                                 errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
 788                 else {
 789                         self.propInterfaces = null;
 790                         if (successCB)
 791                                 successCB(self);
 792                 }
 793         }
 794
 795         function introspectSuccessCB(str) {
 796                 var parser = new DOMParser();
 797                 var xmlDoc = parser.parseFromString(str, "text/xml");
 798                 var interfaces = xmlDoc.getElementsByTagName("interface");
 799                 self.propInterfaces = [];
 800                 var supportDBusProperties = false;
 801                 for (var i=0; i < interfaces.length; i++) {
 802                         var ifName = interfaces[i].attributes.getNamedItem("name").value;
 803                         self.interfaceProxies[ifName] = new cloudeebus.ProxyObject(self.wampSession, self.busConnection, self.busName, self.objectPath);
 804                         if (ifName == "org.freedesktop.DBus.Properties")
 805                                 supportDBusProperties = true;
 806                         var hasProperties = false;
 807                         var ifChild = interfaces[i].firstChild;
 808                         while (ifChild) {
 809                                 if (ifChild.nodeName == "method") {
 810                                         var nArgs = 0;
 811                                         var signature = "";
 812                                         var metChild = ifChild.firstChild;
 813                                         while (metChild) {
 814                                                 if (metChild.nodeName == "arg" &&
 815                                                         metChild.attributes.getNamedItem("direction").value == "in") {
 816                                                                 signature += metChild.attributes.getNamedItem("type").value;
 817                                                                 nArgs++;
 818                                                 }
 819                                                 metChild = metChild.nextSibling;
 820                                         }
 821                                         var metName = ifChild.attributes.getNamedItem("name").value;
 822                                         if (!self[metName])
 823                                                 self._addMethod(ifName, metName, nArgs, signature);
 824                                         self.interfaceProxies[ifName]._addMethod(ifName, metName, nArgs, signature);
 825                                 }
 826                                 else if (ifChild.nodeName == "property") {
 827                                         if (!hasProperties)
 828                                                 self.propInterfaces.push(ifName);
 829                                         hasProperties = true;
 830                                 }
 831                                 ifChild = ifChild.nextSibling;
 832                         }
 833                 }
 834                 if (supportDBusProperties && self.propInterfaces.length > 0) {
 835                         self.callMethod("org.freedesktop.DBus.Properties",
 836                                 "GetAll",
 837                                 [self.propInterfaces[self.propInterfaces.length-1]]).then(getAllPropertiesSuccessCB,
 838                                 errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
 839                 }
 840                 else {
 841                         self.propInterfaces = null;
 842                         if (successCB)
 843                                 successCB(self);
 844                 }
 845         }
 846
 847         // call Introspect on self
 848         self.callMethod("org.freedesktop.DBus.Introspectable", "Introspect", []).then(introspectSuccessCB, errorCB);
 849 };
 850
 851
 852 cloudeebus.ProxyObject.prototype._addMethod = function(ifName, method, nArgs, signature) {
 853
 854         var self = this;
 855
 856         self[method] = function() {
 857                 var args = [];
 858                 for (var i=0; i < nArgs; i++ )
 859                         args.push(arguments[i]);
 860                 return self.callMethod(ifName, method, args, signature);
 861         };
 862 };
 863
 864
 865 cloudeebus.ProxyObject.prototype.callMethod = function(ifName, method, args, signature) {
 866
 867         var self = this;
 868
 869         var promise = new cloudeebus.Promise(function (resolver) {
 870                 function callMethodSuccessCB(str) {
 871                         try { // calling dbus hook object function for un-translated types
 872                                 var result = eval(str);
 873                                 resolver.fulfill(result[0], true);
 874                         }
 875                         catch (e) {
 876                                 var errorStr = cloudeebus.getError(e);
 877                                 cloudeebus.log("Method callback exception: " + errorStr);
 878                                 resolver.reject(errorStr, true);
 879                         }
 880                 }
 881
 882                 function callMethodErrorCB(error) {
 883                         var errorStr = cloudeebus.getError(error);
 884                         cloudeebus.log("Error calling method: " + method + " on object: " + self.objectPath + " : " + errorStr);
 885                         resolver.reject(errorStr, true);
 886                 }
 887
 888                 var arglist = [
 889                         self.busConnection.name,
 890                         self.busName,
 891                         self.objectPath,
 892                         ifName,
 893                         method,
 894                         JSON.stringify(args)
 895                 ];
 896
 897                 // call dbusSend with bus type, destination, object, message and arguments
 898                 self.wampSession.call("dbusSend", arglist).then(callMethodSuccessCB, callMethodErrorCB);
 899         });
 900
 901         return promise;
 902 };
 903
 904
 905 cloudeebus.ProxyObject.prototype.connectToSignal = function(ifName, signal, handlerCB, errorCB) {
 906
 907         var self = this;
 908
 909         function signalHandler(id, data) {
 910                 if (handlerCB) {
 911                         try { // calling dbus hook object function for un-translated types
 912                                 handlerCB.apply(self, eval(data));
 913                         }
 914                         catch (e) {
 915                                 var errorStr = cloudeebus.getError(e);
 916                                 cloudeebus.log("Signal handler exception: " + errorStr);
 917                                 if (errorCB)
 918                                         errorCB(errorStr);
 919                         }
 920                 }
 921         }
 922
 923         function connectToSignalSuccessCB(str) {
 924                 try {
 925                         self.wampSession.subscribe(str, signalHandler);
 926                 }
 927                 catch (e) {
 928                         cloudeebus.log("Subscribe error: " + cloudeebus.getError(e));
 929                 }
 930         }
 931
 932         function connectToSignalErrorCB(error) {
 933                 var errorStr = cloudeebus.getError(error);
 934                 cloudeebus.log("Error connecting to signal: " + signal + " on object: " + self.objectPath + " : " + errorStr);
 935                 if (errorCB)
 936                         errorCB(errorStr);
 937         }
 938
 939         var arglist = [
 940                 self.busConnection.name,
 941                 self.busName,
 942                 self.objectPath,
 943                 ifName,
 944                 signal
 945         ];
 946
 947         // call dbusSend with bus type, destination, object, message and arguments
 948         self.wampSession.call("dbusRegister", arglist).then(connectToSignalSuccessCB, connectToSignalErrorCB);
 949 };
 950
 951
 952 cloudeebus.ProxyObject.prototype.disconnectSignal = function(ifName, signal) {
 953         try {
 954                 this.wampSession.unsubscribe(this.busConnection.name + "#" + this.busName + "#" + this.objectPath + "#" + ifName + "#" + signal);
 955         }
 956         catch (e) {
 957                 cloudeebus.log("Unsubscribe error: " + cloudeebus.getError(e));
 958         }
 959 };