iotjava/iotruntime/slave/IoTSlave.java

   1 package iotruntime.slave;
   2
   3 import iotruntime.*;
   4 import iotruntime.zigbee.*;
   5 import iotruntime.messages.*;
   6 import iotruntime.master.RuntimeOutput;
   7
   8 // Java packages
   9 import java.io.File;
  10 import java.io.FileInputStream;
  11 import java.io.FileOutputStream;
  12 import java.io.ObjectInputStream;
  13 import java.io.ObjectOutputStream;
  14 import java.io.InputStream;
  15 import java.io.OutputStream;
  16 import java.io.IOException;
  17 import java.io.FileNotFoundException;
  18 import java.lang.ClassNotFoundException;
  19 import java.lang.Class;
  20 import java.lang.reflect.*;
  21 import java.lang.ClassLoader;
  22 import java.net.InetAddress;
  23 import java.net.Socket;
  24 import java.net.UnknownHostException;
  25 import java.net.URL;
  26 import java.net.URLClassLoader;
  27 import java.rmi.registry.LocateRegistry;
  28 import java.rmi.registry.Registry;
  29 import java.rmi.Remote;
  30 import java.rmi.RemoteException;
  31 import java.rmi.AlreadyBoundException;
  32 import java.rmi.NotBoundException;
  33 import java.rmi.server.UnicastRemoteObject;
  34 import java.util.Arrays;
  35 import java.util.Properties;
  36 import java.util.HashMap;
  37 import java.util.Map;
  38
  39 // Zip/Unzip utility
  40 import net.lingala.zip4j.exception.ZipException;
  41 import net.lingala.zip4j.core.ZipFile;
  42
  43 /** Class IoTSlave is run by IoTMaster on a different JVM's.
  44  *  It needs to respond to IoTMaster's commands
  45  *
  46  * @author      Rahmadi Trimananda <rahmadi.trimananda @ uci.edu>
  47  * @version     1.0
  48  * @since       2016-06-16
  49  */
  50 public class IoTSlave {
  51
  52         /**
  53          * IoTSlave class properties
  54          */
  55         private Message sIoTMasterMsg;
  56         private String sIoTMasterHostAdd;
  57         private String sMainObjectName;
  58         private int iComPort;
  59         private int iRMIRegPort;
  60         private int iRMIStubPort;
  61         private String strFieldName;
  62         private Class<?> clsMain;
  63         private Object objMainCls;
  64         private Object iRelFirstObject;
  65         private Object iRelSecondObject;
  66         private Socket socket;
  67         private ObjectOutputStream outStream;
  68         private ObjectInputStream inStream;
  69         private Map<String,Object> mapObjNameStub;
  70
  71         /**
  72          * IoTSet object, e.g. IoTSet<ProximitySensor> proximity_sensors;
  73          * IoTRelation object, e.g. IoTRelation<ProximitySensor, LightBulb> ps_lb_relation;
  74          */
  75         private ISet<Object> isetObject;
  76         private IoTSet<Object> iotsetObject;
  77         private IRelation<Object,Object> irelObject;
  78         private IoTRelation<Object,Object> iotrelObject;
  79
  80         // Constants that are to be extracted from config file
  81         private static String STR_JAR_FILE_PATH;
  82         private static String STR_OBJ_CLS_PFX;
  83         private static String STR_INTERFACE_PFX;
  84         private static String SKEL_CLASS_SUFFIX;
  85         private static String STUB_CLASS_SUFFIX;
  86         private static boolean BOOL_VERBOSE;
  87         private static boolean CAPAB_BASED_RMI;
  88
  89         /**
  90          * IoTSlave class constants - not to be changed by users
  91          */
  92         private static final String STR_IOT_SLAVE_NAME = "IoTSlave";
  93         private static final String STR_CFG_FILE_EXT = ".config";
  94         private static final String STR_CLS_FILE_EXT = ".class";
  95         private static final String STR_JAR_FILE_EXT = ".jar";
  96         private static final String STR_ZIP_FILE_EXT = ".zip";
  97         private static final String STR_UNZIP_DIR = "./";
  98         private static final Class<?>[] STR_URL_PARAM = new Class[] {URL.class };
  99         private static final String STR_YES = "Yes";
 100         private static final String STR_NO = "No";
 101
 102         /**
 103          * Class constructor
 104          *
 105          */
 106         public IoTSlave(String[] argInp) {
 107
 108                 sIoTMasterMsg = null;
 109                 sIoTMasterHostAdd = argInp[0];
 110                 iComPort = Integer.parseInt(argInp[1]);
 111                 iRMIRegPort = Integer.parseInt(argInp[2]);
 112                 iRMIStubPort = Integer.parseInt(argInp[3]);
 113                 sMainObjectName = null;
 114                 strFieldName = null;
 115                 clsMain = null;
 116                 objMainCls = null;
 117                 isetObject = null;
 118                 iotsetObject = null;
 119                 irelObject = null;
 120                 iotrelObject = null;
 121                 iRelFirstObject = null;
 122                 iRelSecondObject = null;
 123                 socket = null;
 124                 outStream = null;
 125                 inStream = null;
 126                 mapObjNameStub = new HashMap<String,Object>();
 127
 128                 STR_JAR_FILE_PATH = null;
 129                 STR_OBJ_CLS_PFX = null;
 130                 STR_INTERFACE_PFX = null;
 131                 SKEL_CLASS_SUFFIX = null;
 132                 STUB_CLASS_SUFFIX = null;
 133                 BOOL_VERBOSE = false;
 134                 CAPAB_BASED_RMI = false;
 135         }
 136
 137         /**
 138          * A method to initialize constants from config file
 139          *
 140          * @return void
 141          */
 142         private void parseIoTSlaveConfigFile() {
 143                 // Parse configuration file
 144                 Properties prop = new Properties();
 145                 String strCfgFileName = STR_IOT_SLAVE_NAME + STR_CFG_FILE_EXT;
 146                 File file = new File(strCfgFileName);
 147                 try {
 148                         FileInputStream fis = new FileInputStream(file);
 149                         prop.load(fis);
 150                 } catch (IOException ex) {
 151                         System.out.println("IoTMaster: Error reading config file: " + strCfgFileName);
 152                         ex.printStackTrace();
 153                 }
 154                 System.out.println("IoTMaster: Extracting information from config file: " + strCfgFileName);
 155                 // Initialize constants from config file
 156                 STR_JAR_FILE_PATH = prop.getProperty("JAR_FILE_PATH");
 157                 STR_OBJ_CLS_PFX = prop.getProperty("OBJECT_CLASS_PREFIX");
 158                 STR_INTERFACE_PFX = prop.getProperty("INTERFACE_PREFIX");
 159                 SKEL_CLASS_SUFFIX = prop.getProperty("SKEL_CLASS_SUFFIX");
 160                 STUB_CLASS_SUFFIX = prop.getProperty("STUB_CLASS_SUFFIX");
 161                 if (prop.getProperty("VERBOSE").equals(STR_YES)) {
 162                         BOOL_VERBOSE = true;
 163                 }
 164                 if (prop.getProperty("CAPAB_BASED_RMI").equals(STR_YES)) {
 165                         CAPAB_BASED_RMI = true;
 166                 }
 167
 168                 System.out.println("JAR_FILE_PATH=" + STR_JAR_FILE_PATH);
 169                 System.out.println("OBJECT_CLASS_PREFIX=" + STR_OBJ_CLS_PFX);
 170                 System.out.println("INTERFACE_PREFIX=" + STR_INTERFACE_PFX);
 171                 System.out.println("SKEL_CLASS_SUFFIX=" + SKEL_CLASS_SUFFIX);
 172                 System.out.println("STUB_CLASS_SUFFIX=" + STUB_CLASS_SUFFIX);
 173                 System.out.println("CAPAB_BASED_RMI=" + CAPAB_BASED_RMI);
 174                 System.out.println("IoTMaster: Information extracted successfully!");
 175         }
 176
 177         /**
 178          * Adds the content pointed by the URL to the classpath dynamically at runtime (hack!!!)
 179          *
 180          * @param  url         the URL pointing to the content to be added
 181          * @throws IOException
 182          * @see    <a href="http://stackoverflow.com/questions/60764/how-should-i-load-jars-dynamically-at-runtime</a>
 183          */
 184         private static void addURL(URL url) throws IOException {
 185
 186                 URLClassLoader sysloader = (URLClassLoader)ClassLoader.getSystemClassLoader();
 187                 Class<?> sysclass = URLClassLoader.class;
 188
 189                 try {
 190
 191                         Method method = sysclass.getDeclaredMethod("addURL", STR_URL_PARAM);
 192                         method.setAccessible(true);
 193                         method.invoke(sysloader,new Object[] { url });
 194
 195                 } catch (Throwable t) {
 196
 197                         t.printStackTrace();
 198                         throw new IOException("IoTSlave: Could not add URL to system classloader!");
 199                 }
 200         }
 201
 202         /**
 203          * A private method to create object
 204          *
 205          * @return  void
 206          */
 207         private void createCapabBasedRMIJava(MessageCreateObject sMessage) throws
 208                 ClassNotFoundException, NoSuchMethodException, UnknownHostException {
 209
 210                 // TODO: DEBUG
 211                 System.out.println("\n\nDEBUG: Create capab based RMI here!");
 212                 System.out.println("DEBUG: sMessage host address: " + sMessage.getHostAddress());
 213                 System.out.println("DEBUG: sMessage object class: " + sMessage.getObjectClass());
 214                 System.out.println("DEBUG: sMessage object name: " + sMessage.getObjectName());
 215                 System.out.println("DEBUG: sMessage interface name: " + sMessage.getObjectInterfaceName());
 216                 System.out.println("DEBUG: sMessage reg port: " + sMessage.getRMIRegPort());
 217                 System.out.println("DEBUG: sMessage stub port: " + sMessage.getRMIStubPort());
 218                 System.out.println("DEBUG: sMessage object fields: " + Arrays.toString(sMessage.getObjectFields()));
 219                 System.out.println("DEBUG: sMessage object fields: " + Arrays.toString(sMessage.getObjectFldCls()));
 220                 System.out.println("\n\n");
 221
 222                 // Instantiate the skeleton and put in the object
 223                 String strObjSkelName = STR_OBJ_CLS_PFX + "." + sMessage.getObjectClass() +
 224                                                                         "." + sMessage.getObjectInterfaceName() + SKEL_CLASS_SUFFIX;
 225                 RuntimeOutput.print("IoTSlave: Skeleton object: " + strObjSkelName, BOOL_VERBOSE);
 226                 Class<?> clsSkel = Class.forName(strObjSkelName);
 227                 Class<?> clsInt = Class.forName(STR_OBJ_CLS_PFX + "." + STR_INTERFACE_PFX +
 228                         "." + sMessage.getObjectInterfaceName());
 229                 Class[] clsSkelParams = { clsInt, int.class, int.class };       // Port number is integer
 230                 Constructor<?> objSkelCons = clsSkel.getDeclaredConstructor(clsSkelParams);
 231                 Object objSkelParams[] = { objMainCls, iRMIStubPort, iRMIRegPort };
 232                 // Create a new thread for each skeleton
 233                 Thread objectThread = new Thread(new Runnable() {
 234                         public void run() {
 235                                 try {
 236                                         Object objSkel = objSkelCons.newInstance(objSkelParams);
 237                                 } catch (InstantiationException |
 238                                                  IllegalAccessException |
 239                                                  InvocationTargetException ex) {
 240                                         ex.printStackTrace();
 241                                 }
 242                         }
 243                 });
 244                 objectThread.start();
 245                 RuntimeOutput.print("IoTSlave: Done generating object!", BOOL_VERBOSE);
 246         }
 247
 248         /**
 249          * A private method to create object
 250          *
 251          * @return  void
 252          */
 253         private void createObject() throws IOException,
 254                 ClassNotFoundException, NoSuchMethodException, InstantiationException,
 255                         RemoteException, AlreadyBoundException, IllegalAccessException,
 256                                 InvocationTargetException {
 257
 258                 // TODO: DEBUG
 259                 System.out.println("\n\nDEBUG: CREATE DRIVER OBJECT!!!\n\n");
 260
 261                 // Translating into the actual Message class
 262                 MessageCreateObject sMessage = (MessageCreateObject) sIoTMasterMsg;
 263                 // Instantiate object using reflection
 264                 String strObjClassName = STR_OBJ_CLS_PFX + "." + sMessage.getObjectClass() +
 265                                                                                                                  "." + sMessage.getObjectClass();
 266                 File file = new File(STR_JAR_FILE_PATH + sMessage.getObjectClass() + STR_JAR_FILE_EXT);
 267                 RuntimeOutput.print("IoTSlave: DEBUG print path: " + STR_JAR_FILE_PATH +
 268                                                                                          sMessage.getObjectClass() + STR_JAR_FILE_EXT, BOOL_VERBOSE);
 269                 addURL(file.toURI().toURL());
 270                 clsMain = Class.forName(strObjClassName);
 271                 Class[] clsParams = sMessage.getObjectFldCls();
 272                 Constructor<?> ct = clsMain.getDeclaredConstructor(clsParams);
 273                 Object objParams[] = sMessage.getObjectFields();
 274                 objMainCls = ct.newInstance(objParams);
 275                 RuntimeOutput.print("IoTSlave: Creating RMI skeleton: " +
 276                         sMessage.getHostAddress() + ":" + sMessage.getRMIRegPort() +
 277                         " with RMI stub port: " + iRMIStubPort, BOOL_VERBOSE);
 278                 if (CAPAB_BASED_RMI) {
 279                 // Use the new capability-based RMI in Java
 280                         createCapabBasedRMIJava(sMessage);
 281                 } else {
 282                         // Register object to RMI - there are 2 ports: RMI registry port and RMI stub port
 283                         Object objStub = (Object)
 284                                 UnicastRemoteObject.exportObject((Remote) objMainCls, iRMIStubPort);
 285                         Registry registry = LocateRegistry.createRegistry(iRMIRegPort);
 286                         registry.bind(sMessage.getObjectName(), (Remote) objStub);
 287                 }
 288                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 289                 RuntimeOutput.print("IoTSlave: Registering object via RMI!", BOOL_VERBOSE);
 290
 291         }
 292
 293
 294         /**
 295          * A private method to transfer file
 296          *
 297          * @return  void
 298          */
 299         private void transferFile() throws IOException,
 300                 UnknownHostException, FileNotFoundException {
 301
 302                 // Translating into the actual Message class
 303                 MessageSendFile sMessage = (MessageSendFile) sIoTMasterMsg;
 304
 305                 // Send back the received message as acknowledgement
 306                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 307
 308                 // Write file to the current location
 309                 Socket filesocket = new Socket(sIoTMasterHostAdd, iComPort);
 310                 InputStream inFileStream = filesocket.getInputStream();
 311                 OutputStream outFileStream = new FileOutputStream(sMessage.getFileName());
 312                 byte[] bytFile = new byte[Math.toIntExact(sMessage.getFileSize())];
 313
 314                 int iCount = 0;
 315                 while ((iCount = inFileStream.read(bytFile)) > 0) {
 316                         outFileStream.write(bytFile, 0, iCount);
 317                 }
 318                 // Unzip if this is a zipped file
 319                 if (sMessage.getFileName().contains(STR_ZIP_FILE_EXT)) {
 320                         RuntimeOutput.print("IoTSlave: Unzipping file: " + sMessage.getFileName(), BOOL_VERBOSE);
 321                         try {
 322                                 ZipFile zipFile = new ZipFile(sMessage.getFileName());
 323                                 zipFile.extractAll(STR_UNZIP_DIR);
 324                         } catch (ZipException ex) {
 325                                 System.out.println("IoTSlave: Error in unzipping file!");
 326                                 ex.printStackTrace();
 327                         }
 328                 }
 329                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 330                 RuntimeOutput.print("IoTSlave: Receiving file transfer!", BOOL_VERBOSE);
 331         }
 332
 333         /**
 334          * A private method to create a main object
 335          *
 336          * @return  void
 337          */
 338         private void createMainObject() throws IOException,
 339                 ClassNotFoundException, InstantiationException, IllegalAccessException,
 340                         InvocationTargetException {
 341
 342                 // Translating into the actual Message class
 343                 MessageCreateMainObject sMessage = (MessageCreateMainObject) sIoTMasterMsg;
 344
 345                 // TODO: DEBUG
 346                 System.out.println("\n\nDEBUG: CREATE MAIN OBJECT!!!");
 347                 System.out.println("DEBUG: sMessage object name: " + sMessage.getObjectName());
 348
 349                 // Getting controller class
 350                 File file = new File(STR_JAR_FILE_PATH + sMessage.getObjectName() + STR_JAR_FILE_EXT);
 351                 RuntimeOutput.print("IoTSlave: DEBUG print path: " + STR_JAR_FILE_PATH +
 352                                                                                          sMessage.getObjectName() + STR_JAR_FILE_EXT, BOOL_VERBOSE);
 353                 addURL(file.toURI().toURL());
 354                 // We will always have a package name <object name>.<object name>
 355                 // e.g. SmartLightsController.SmartLightsController
 356                 sMainObjectName = sMessage.getObjectName();
 357                 clsMain = Class.forName(sMainObjectName + "." + sMainObjectName);
 358                 objMainCls = clsMain.newInstance();
 359
 360                 // Send back the received message as acknowledgement
 361                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 362                 RuntimeOutput.print("IoTSlave: Instantiating main controller/device class "
 363                                                                                          + sMessage.getObjectName(), BOOL_VERBOSE);
 364
 365         }
 366
 367         /**
 368          * A private method to create a new IoTSet
 369          *
 370          * @return  void
 371          */
 372         private void createNewIoTSet() throws IOException {
 373
 374                 // Translating into the actual Message class
 375                 MessageCreateSetRelation sMessage = (MessageCreateSetRelation) sIoTMasterMsg;
 376
 377                 // TODO: DEBUG
 378                 System.out.println("\n\nDEBUG: CREATE NEW IOT SET!!!");
 379                 System.out.println("DEBUG: sMessage object field name: " + sMessage.getObjectFieldName());
 380
 381                 // Initialize field name
 382                 strFieldName = sMessage.getObjectFieldName();
 383                 RuntimeOutput.print("IoTSlave: Setting up field " + strFieldName, BOOL_VERBOSE);
 384
 385                 // Creating a new IoTSet object
 386                 isetObject = new ISet<Object>();
 387
 388                 // Send back the received message as acknowledgement
 389                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 390                 RuntimeOutput.print("IoTSlave: Creating a new IoTSet object!", BOOL_VERBOSE);
 391
 392         }
 393
 394         /**
 395          * A private method to create a new IoTRelation
 396          *
 397          * @return  void
 398          */
 399         private void createNewIoTRelation() throws IOException {
 400
 401                 // Translating into the actual Message class
 402                 MessageCreateSetRelation sMessage = (MessageCreateSetRelation) sIoTMasterMsg;
 403
 404                 // TODO: DEBUG
 405                 System.out.println("\n\nDEBUG: CREATE NEW IOT RELATION!!!");
 406                 System.out.println("DEBUG: sMessage object field name: " + sMessage.getObjectFieldName());
 407
 408                 // Initialize field name
 409                 strFieldName = sMessage.getObjectFieldName();
 410                 RuntimeOutput.print("IoTSlave: Setting up field " + strFieldName, BOOL_VERBOSE);
 411
 412                 // Creating a new IoTRelation object
 413                 irelObject = new IRelation<Object,Object>();
 414
 415                 // Send back the received message as acknowledgement
 416                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 417                 RuntimeOutput.print("IoTSlave: Creating a new IoTRelation object!", BOOL_VERBOSE);
 418
 419         }
 420
 421         /**
 422          * A private method to get an object from the registry
 423          *
 424          * @return  Object
 425          */
 426         private Object getObjectFromRegistry() throws RemoteException,
 427                         ClassNotFoundException, NotBoundException {
 428
 429                 // Translating into the actual Message class
 430                 MessageGetObject sMessage = (MessageGetObject) sIoTMasterMsg;
 431
 432                 // Locate RMI registry and add object into IoTSet
 433                 Registry registry =
 434                         LocateRegistry.getRegistry(sMessage.getHostAddress(), sMessage.getRMIRegPort());
 435                 RuntimeOutput.print("IoTSlave: Looking for RMI registry: " +
 436                         sMessage.getHostAddress() + ":" + sMessage.getRMIRegPort() +
 437                         " with RMI stub port: " + sMessage.getRMIStubPort(), BOOL_VERBOSE);
 438                 Object stubObj = registry.lookup(sMessage.getObjectName());
 439                 RuntimeOutput.print("IoTSlave: Looking for object name: " + sMessage.getObjectName(), BOOL_VERBOSE);
 440
 441                 // Class conversion to interface class of this class,
 442                 // e.g. ProximitySensorImpl has ProximitySensor interface
 443                 String strObjClassInterfaceName = STR_OBJ_CLS_PFX + "." + STR_INTERFACE_PFX + "." +
 444                         sMessage.getObjectInterfaceName();
 445                 Class<?> clsInf = Class.forName(strObjClassInterfaceName);
 446                 Object stubObjConv = clsInf.cast(stubObj);
 447
 448                 return stubObjConv;
 449         }
 450
 451         /**
 452          * A private method to get an object and create a stub
 453          * <p>
 454          * This is using the capability-based RMI skeleton and stub scheme
 455          *
 456          * @return  Object
 457          */
 458         private Object getObjectFromStub() throws RemoteException,
 459                         ClassNotFoundException, NoSuchMethodException, InstantiationException,
 460                         IllegalAccessException, NotBoundException, InvocationTargetException, UnknownHostException {
 461
 462                 // Translating into the actual Message class
 463                 MessageGetObject sMessage = (MessageGetObject) sIoTMasterMsg;
 464
 465                 System.out.println("DEBUG: sMessage host address: " + sMessage.getHostAddress());
 466                 System.out.println("DEBUG: sMessage object class: " + sMessage.getObjectClass());
 467                 System.out.println("DEBUG: sMessage object name: " + sMessage.getObjectName());
 468                 System.out.println("DEBUG: sMessage interface name: " + sMessage.getObjectInterfaceName());
 469                 System.out.println("DEBUG: sMessage reg port: " + sMessage.getRMIRegPort());
 470                 System.out.println("DEBUG: sMessage stub port: " + sMessage.getRMIStubPort());
 471                 System.out.println("DEBUG: sMessage callback ports: " + Arrays.toString(sMessage.getRMICallbackPorts()));
 472                 System.out.println("\n\n");
 473
 474                 Object stubObjConv = null;
 475                 String strObjectName = sMessage.getObjectName();
 476                 String strObjClassInterfaceName = STR_OBJ_CLS_PFX + "." + STR_INTERFACE_PFX + "." +
 477                         sMessage.getObjectStubInterfaceName();
 478                 Class<?> clsInf = Class.forName(strObjClassInterfaceName);
 479                 if (mapObjNameStub.containsKey(strObjectName)) {
 480                         RuntimeOutput.print("IoTSlave: Getting back object on slave: " + strObjectName, BOOL_VERBOSE);
 481                         stubObjConv = clsInf.cast(mapObjNameStub.get(strObjectName));
 482                 } else {
 483                         // Instantiate the stub and put in the object
 484                         String strObjStubName = sMainObjectName + "." + sMessage.getObjectStubInterfaceName() + STUB_CLASS_SUFFIX;
 485                         Class<?> clsStub = Class.forName(strObjStubName);       // Port number is integer
 486                         Class[] clsStubParams = { int.class, int.class, int.class, int.class, String.class, int.class };
 487                         Constructor<?> objStubCons = clsStub.getDeclaredConstructor(clsStubParams);
 488
 489                         int rev = 0;
 490                         Object objStubParams[] = { 0, 0, sMessage.getRMIStubPort(), sMessage.getRMIRegPort(), sMessage.getHostAddress(), rev };
 491                         RuntimeOutput.print("IoTSlave: Creating RMI stub: " +
 492                                 sMessage.getHostAddress() + ":" + sMessage.getRMIRegPort() +
 493                                 " and RMI stub port: " + sMessage.getRMIStubPort(), BOOL_VERBOSE);
 494                         Object stubObj = objStubCons.newInstance(objStubParams);
 495                         // Class conversion to interface class of this class,
 496                         // e.g. ProximitySensorImpl has ProximitySensor interface
 497                         RuntimeOutput.print("IoTSlave: Registering new stub object: " + strObjectName, BOOL_VERBOSE);
 498                         mapObjNameStub.put(strObjectName, stubObj);
 499                         stubObjConv = clsInf.cast(stubObj);
 500                 }
 501
 502                 return stubObjConv;
 503         }
 504
 505         /**
 506          * A private method to get an IoTSet object
 507          *
 508          * @return  void
 509          */
 510         private void getIoTSetObject() throws IOException,
 511                 ClassNotFoundException, RemoteException, NotBoundException, NoSuchMethodException,
 512                 InstantiationException, IllegalAccessException, InvocationTargetException {
 513
 514                 // TODO: DEBUG
 515                 System.out.println("\n\nDEBUG: GET IOT SET OBJECT!!!");
 516
 517                 Object objRegistry = null;
 518                 if (CAPAB_BASED_RMI)
 519                         objRegistry = getObjectFromStub();
 520                 else
 521                         objRegistry = getObjectFromRegistry();
 522                 isetObject.add(objRegistry);
 523                 RuntimeOutput.print("IoTSlave: This IoTSet now has: " + isetObject.size() + " entry(s)", BOOL_VERBOSE);
 524
 525                 // Send back the received message as acknowledgement
 526                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 527                 RuntimeOutput.print("IoTSlave: Getting an object for IoTSet!", BOOL_VERBOSE);
 528         }
 529
 530         /**
 531          * A private method to get an IoTRelation first object
 532          *
 533          * @return  void
 534          */
 535         private void getIoTRelationFirstObject() throws IOException,
 536                 ClassNotFoundException, RemoteException, NotBoundException, NoSuchMethodException,
 537                 InstantiationException, IllegalAccessException, InvocationTargetException {
 538
 539                 // TODO: DEBUG
 540                 System.out.println("\n\nDEBUG: GET IOT RELATION FIRST OBJECT!!!");
 541
 542                 Object objRegistry = null;
 543                 if (CAPAB_BASED_RMI)
 544                         objRegistry = getObjectFromStub();
 545                 else
 546                         objRegistry = getObjectFromRegistry();
 547                 iRelFirstObject = objRegistry;
 548
 549                 // Send back the received message as acknowledgement
 550                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 551                 RuntimeOutput.print("IoTSlave: Getting a first object for IoTRelation!", BOOL_VERBOSE);
 552
 553         }
 554
 555         /**
 556          * A private method to get an IoTRelation second object
 557          *
 558          * @return  void
 559          */
 560         private void getIoTRelationSecondObject() throws IOException,
 561                 ClassNotFoundException, RemoteException, NotBoundException, NoSuchMethodException,
 562                 InstantiationException, IllegalAccessException, InvocationTargetException {
 563
 564                 // TODO: DEBUG
 565                 System.out.println("\n\nDEBUG: GET IOT RELATION SECOND OBJECT!!!");
 566
 567                 Object objRegistry = null;
 568                 if (CAPAB_BASED_RMI)
 569                         objRegistry = getObjectFromStub();
 570                 else
 571                         objRegistry = getObjectFromRegistry();
 572                 iRelSecondObject = objRegistry;
 573
 574                 // Now add the first and the second object into IoTRelation
 575                 irelObject.put(iRelFirstObject, iRelSecondObject);
 576                 RuntimeOutput.print("IoTSlave: This IoTRelation now has: " + irelObject.size() + " entry(s)", BOOL_VERBOSE);
 577
 578                 // Send back the received message as acknowledgement
 579                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 580                 RuntimeOutput.print("IoTSlave: Getting a second object for IoTRelation!", BOOL_VERBOSE);
 581
 582         }
 583
 584         /**
 585          * A private method to reinitialize IoTSet field
 586          *
 587          * @return  void
 588          */
 589         private void reinitializeIoTSetField() throws IOException,
 590                 IllegalAccessException, NoSuchFieldException {
 591
 592                 // Reinitialize IoTSet field after getting all the objects
 593                 iotsetObject = new IoTSet<Object>(isetObject.values());
 594
 595                 // TODO: DEBUG
 596                 System.out.println("\n\nDEBUG: REINITIALIZE IOT SET FIELD!!!");
 597                 System.out.println("DEBUG: Field name: " + strFieldName + "\n\n");
 598
 599                 // Private fields need getDeclaredField(), while public fields use getField()
 600                 Field fld = clsMain.getDeclaredField(strFieldName);
 601                 boolean bAccess = fld.isAccessible();
 602                 fld.setAccessible(true);
 603                 fld.set(objMainCls, iotsetObject);
 604                 fld.setAccessible(bAccess);
 605                 RuntimeOutput.print("IoTSlave: Reinitializing field " + strFieldName, BOOL_VERBOSE);
 606
 607                 // Send back the received message as acknowledgement
 608                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 609                 RuntimeOutput.print("IoTSlave: Reinitializing IoTSet field!", BOOL_VERBOSE);
 610
 611         }
 612
 613         /**
 614          * A private method to reinitialize IoTRelation field
 615          *
 616          * @return  void
 617          */
 618         private void reinitializeIoTRelationField() throws IOException,
 619                 IllegalAccessException, NoSuchFieldException {
 620
 621                 // Reinitialize IoTSet field after getting all the objects
 622                 iotrelObject = new IoTRelation<Object,Object>(irelObject.relationMap(), irelObject.size());
 623
 624                 // TODO: DEBUG
 625                 System.out.println("\n\nDEBUG: REINITIALIZE IOT RELATION FIELD!!!");
 626                 System.out.println("DEBUG: Field name: " + strFieldName + "\n\n");
 627
 628                 // Private fields need getDeclaredField(), while public fields use getField()
 629                 Field fld = clsMain.getDeclaredField(strFieldName);
 630                 boolean bAccess = fld.isAccessible();
 631                 fld.setAccessible(true);
 632                 fld.set(objMainCls, iotrelObject);
 633                 fld.setAccessible(bAccess);
 634                 RuntimeOutput.print("IoTSlave: Reinitializing field " + strFieldName, BOOL_VERBOSE);
 635
 636                 // Send back the received message as acknowledgement
 637                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 638                 RuntimeOutput.print("IoTSlave: Reinitializing IoTRelation field!", BOOL_VERBOSE);
 639
 640         }
 641
 642         /**
 643          * A private method to get the device driver object's IoTSet
 644          * <p>
 645          * This is to handle device driver's IoTSet that contains IP addresses
 646          *
 647          * @return  void
 648          */
 649         private void getDeviceIoTSetObject() throws IOException {
 650
 651                 // Translating into the actual Message class
 652                 MessageGetDeviceObject sMessage = (MessageGetDeviceObject) sIoTMasterMsg;
 653
 654                 // TODO: DEBUG
 655                 System.out.println("\n\nDEBUG: GET DEVICE IOT SET OBJECT!!!");
 656                 System.out.println("DEBUG: sMessage host address: " + sMessage.getHostAddress());
 657                 System.out.println("DEBUG: sMessage source port: " + sMessage.getSourceDeviceDriverPort());
 658                 System.out.println("DEBUG: sMessage destination port: " + sMessage.getDestinationDeviceDriverPort());
 659                 System.out.println("DEBUG: sMessage source wild card: " + sMessage.isSourcePortWildCard());
 660                 System.out.println("DEBUG: sMessage desination wild card: " + sMessage.isDestinationPortWildCard() + "\n\n");
 661
 662                 // Get IoTSet objects for IP address set on device driver/controller
 663                 IoTDeviceAddress objDeviceAddress = new IoTDeviceAddress(sMessage.getHostAddress(),
 664                         sMessage.getSourceDeviceDriverPort(),
 665                         sMessage.getDestinationDeviceDriverPort(),
 666                         sMessage.isSourcePortWildCard(),
 667                         sMessage.isDestinationPortWildCard());
 668                 RuntimeOutput.print("IoTSlave: Device address transferred: " + sMessage.getHostAddress(), BOOL_VERBOSE);
 669                 isetObject.add(objDeviceAddress);
 670                 RuntimeOutput.print("IoTSlave: This IoTSet now has: " + isetObject.size() + " entry(s)", BOOL_VERBOSE);
 671
 672                 // Send back the received message as acknowledgement
 673                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 674                 RuntimeOutput.print("IoTSlave: Getting an object for IoTSet!", BOOL_VERBOSE);
 675
 676         }
 677
 678         /**
 679          * A private method to get the device driver object's IoTSet for IoTZigbeeAddress
 680          * <p>
 681          * This is to handle device driver's IoTSet that contains Zigbee addresses
 682          *
 683          * @return  void
 684          */
 685         private void getZBDevIoTSetObject() throws IOException {
 686
 687                 // Translating into the actual Message class
 688                 MessageGetSimpleDeviceObject sMessage = (MessageGetSimpleDeviceObject) sIoTMasterMsg;
 689
 690                 // TODO: DEBUG
 691                 System.out.println("\n\nDEBUG: GET ZIGBEE DEVICE IOT SET OBJECT!!!");
 692                 System.out.println("DEBUG: sMessage host address: " + sMessage.getHostAddress() + "\n\n");
 693
 694                 // Get IoTSet objects for IP address set on device driver/controller
 695                 IoTZigbeeAddress objZBDevAddress = new IoTZigbeeAddress(sMessage.getHostAddress());
 696                 RuntimeOutput.print("IoTSlave: Device address transferred: " + sMessage.getHostAddress(), BOOL_VERBOSE);
 697                 isetObject.add(objZBDevAddress);
 698                 RuntimeOutput.print("IoTSlave: This IoTSet now has: " + isetObject.size() + " entry(s)", BOOL_VERBOSE);
 699
 700                 // Send back the received message as acknowledgement
 701                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 702                 RuntimeOutput.print("IoTSlave: Getting an object for IoTSet!", BOOL_VERBOSE);
 703
 704         }
 705
 706
 707         /**
 708          * A private method to get IoTAddress objects for IoTSet
 709          *
 710          * @return  void
 711          */
 712         private void getAddIoTSetObject() throws IOException {
 713
 714                 // Translating into the actual Message class
 715                 MessageGetSimpleDeviceObject sMessage = (MessageGetSimpleDeviceObject) sIoTMasterMsg;
 716
 717                 // TODO: DEBUG
 718                 System.out.println("\n\nDEBUG: GET ADD IOT SET OBJECT!!!");
 719                 System.out.println("DEBUG: sMessage host address: " + sMessage.getHostAddress() + "\n\n");
 720
 721                 // Get IoTSet objects for IP address set on device driver/controller
 722                 IoTAddress objAddress = new IoTAddress(sMessage.getHostAddress());
 723                 RuntimeOutput.print("IoTSlave: Address transferred: " + sMessage.getHostAddress(), BOOL_VERBOSE);
 724                 isetObject.add(objAddress);
 725                 RuntimeOutput.print("IoTSlave: This IoTSet now has: " + isetObject.size() + " entry(s)", BOOL_VERBOSE);
 726                 // Send back the received message as acknowledgement
 727                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 728                 RuntimeOutput.print("IoTSlave: Getting an object for IoTSet!", BOOL_VERBOSE);
 729
 730         }
 731
 732         /**
 733          * A private method to invoke init() method in the controller object
 734          *
 735          * @return  void
 736          */
 737         private void invokeInitMethod() throws IOException {
 738
 739                 // TODO: DEBUG
 740                 System.out.println("\n\nDEBUG: INVOKE INIT METHOD!!!\n\n");
 741
 742                 new Thread() {
 743                         public void run() {
 744                                 try {
 745                                         Class<?> noparams[] = {};
 746                                         Method method = clsMain.getDeclaredMethod("init", noparams);
 747                                         method.invoke(objMainCls);
 748                                 } catch (NoSuchMethodException  |
 749                                                  IllegalAccessException |
 750                                                  InvocationTargetException ex) {
 751                                         System.out.println("IoTSlave: Exception: "
 752                                                  + ex.getMessage());
 753                                         ex.printStackTrace();
 754                                 }
 755                         }
 756                 }.start();
 757
 758                 // Start a new thread to invoke the init function
 759                 RuntimeOutput.print("IoTSlave: Invoke init method! Job done!", BOOL_VERBOSE);
 760
 761                 // Send back the received message as acknowledgement
 762                 outStream.writeObject(new MessageSimple(IoTCommCode.ACKNOWLEDGED));
 763
 764         }
 765
 766         /**
 767          * A public method to do communication with IoTMaster
 768          *
 769          * @params  iIndex  Integer index
 770          * @return  void
 771          */
 772         public void commIoTMaster() {
 773
 774                 try {
 775
 776                         // Loop, receive and process commands from IoTMaster
 777                         socket = new Socket(sIoTMasterHostAdd, iComPort);
 778                         outStream = new ObjectOutputStream(socket.getOutputStream());
 779                         inStream = new ObjectInputStream(socket.getInputStream());
 780
 781                         LOOP:
 782                         while(true) {
 783                                 // Get the first payload
 784                                 RuntimeOutput.print("IoTSlave: Slave waiting...", BOOL_VERBOSE);
 785                                 sIoTMasterMsg = (Message) inStream.readObject();
 786
 787                                 // Check payload message from IoTMaster and make a decision
 788                                 switch (sIoTMasterMsg.getMessage()) {
 789
 790                                 case CREATE_OBJECT:
 791                                         createObject();
 792                                         break;
 793
 794                                 case TRANSFER_FILE:
 795                                         transferFile();
 796                                         break;
 797
 798                                 case CREATE_MAIN_OBJECT:
 799                                         createMainObject();
 800                                         break;
 801
 802                                 case CREATE_NEW_IOTSET:
 803                                         createNewIoTSet();
 804                                         break;
 805
 806                                 case CREATE_NEW_IOTRELATION:
 807                                         createNewIoTRelation();
 808                                         break;
 809
 810                                 case GET_IOTSET_OBJECT:
 811                                         getIoTSetObject();
 812                                         break;
 813
 814                                 case GET_IOTRELATION_FIRST_OBJECT:
 815                                         getIoTRelationFirstObject();
 816                                         break;
 817
 818                                 case GET_IOTRELATION_SECOND_OBJECT:
 819                                         getIoTRelationSecondObject();
 820                                         break;
 821
 822                                 case REINITIALIZE_IOTSET_FIELD:
 823                                         reinitializeIoTSetField();
 824                                         break;
 825
 826                                 case REINITIALIZE_IOTRELATION_FIELD:
 827                                         reinitializeIoTRelationField();
 828                                         break;
 829
 830                                 case GET_DEVICE_IOTSET_OBJECT:
 831                                         getDeviceIoTSetObject();
 832                                         break;
 833
 834                                 case GET_ZB_DEV_IOTSET_OBJECT:
 835                                         getZBDevIoTSetObject();
 836                                         break;
 837
 838                                 case GET_ADD_IOTSET_OBJECT:
 839                                         getAddIoTSetObject();
 840                                         break;
 841
 842                                 case INVOKE_INIT_METHOD:
 843                                         invokeInitMethod();
 844                                         break;
 845
 846                                 case END_SESSION:
 847                                         // END of session
 848                                         break LOOP;
 849
 850                                 default:
 851                                         break;
 852                                 }
 853                         }
 854                         RuntimeOutput.print("IoTSlave: Session ends!", BOOL_VERBOSE);
 855
 856                         // Closing streams and end session
 857                         outStream.close();
 858                         inStream.close();
 859                         socket.close();
 860                         RuntimeOutput.print("IoTSlave: Closing!", BOOL_VERBOSE);
 861                         // We have to continuously loop because we are preserving our stubs and skeletons
 862                         //while(true) { }
 863
 864                 } catch (IOException               |
 865                                  ClassNotFoundException    |
 866                                  NoSuchMethodException     |
 867                                  InstantiationException    |
 868                                  AlreadyBoundException     |
 869                                  IllegalAccessException    |
 870                                  InvocationTargetException |
 871                                  NotBoundException         |
 872                                  NoSuchFieldException ex) {
 873                         System.out.println("IoTSlave: Exception: "
 874                                  + ex.getMessage());
 875                         ex.printStackTrace();
 876                 }
 877         }
 878
 879         public static void main(String args[]) {
 880                 IoTSlave iotSlave = new IoTSlave(args);
 881                 iotSlave.parseIoTSlaveConfigFile();
 882                 iotSlave.commIoTMaster();
 883         }
 884 }