src/plpbus/OrbServerImpl.cc

   1 /*
   2  * OrbServerImpl.cc
   3  *
   4  *  Created on: Aug 11, 2010
   5  *      Author: lamikr
   6  */
   7
   8 #include <plp/log.h>
   9
  10 #include "ServerEventThread.hh"
  11 #include "OrbServerImpl.hh"
  12 #include "ClientServerCommon.hh"
  13 #include "BusMessageInternal.hh"
  14
  15 using namespace std;
  16 using namespace plpbus;
  17 using namespace plpbus_orb;
  18
  19 static omni_mutex       server_thread_mutex;
  20 static omni_condition   server_thread_shutdown_signal(&server_thread_mutex);
  21
  22 OrbServerImpl::OrbServerImpl()
  23 {
  24         _orb                    = NULL;
  25         _poa                    = NULL;
  26         _server_thread_count    = 0;
  27         _shutdown_pending       = 0;
  28         _listener               = NULL;
  29 }
  30
  31 OrbServerImpl::~OrbServerImpl()
  32 {
  33         log_info("OrbServerImpl destroyed.\n");
  34 }
  35
  36 void OrbServerImpl::send_message_and_request_response(OrbClient_ptr response_listener_param,
  37                                                 const char* msg_req)
  38 {
  39         char    *msg_rsp;
  40
  41         msg_rsp = NULL;
  42         if (CORBA::is_nil(response_listener_param) == false) {
  43                 if (_listener != NULL) {
  44                         log_debug("send_message_and_request_response(): %s, server callback != NULL\n", msg_req);
  45                         _listener->request_received(msg_req, &msg_rsp);
  46                         log_debug("send_message_and_request_response(), request_received\n");
  47                         response_listener_param->receive_response_message(msg_rsp);
  48                 }
  49                 else {
  50                         log_error("send_message_and_request_response() error, server callback == NULL\n");
  51                 }
  52         }
  53         else {
  54                 log_error("invalid callback object received.\n");
  55         }
  56 }
  57
  58 char *OrbServerImpl::send_message_and_wait_response(const char* msg_req_param, ::CORBA::Long& err_flg) {
  59         char    *msg_rsp;
  60         char    *ret_val;
  61
  62         err_flg = 0;
  63         msg_rsp = NULL;
  64         if (_listener != NULL) {
  65                 log_debug("send_message_and_wait_response(): %s, server_callback != NULL\n", msg_req_param);
  66                 _listener->request_received(msg_req_param, &msg_rsp);
  67         }
  68         else {
  69                 log_error("send_message_and_wait_response() error, server callback == NULL\n");
  70                 msg_rsp = strdup(msg_req_param);
  71                 err_flg = -1;
  72         }
  73         ret_val = CORBA::string_dup(msg_rsp);
  74         return ret_val;
  75 }
  76
  77 void OrbServerImpl::send_dataitem_message_and_request_response(OrbClient_ptr response_listener_param,
  78                                                         const ::DataItemSequence& msg_req_param) {
  79         BusMessage              *msg_req;
  80         BusMessage              *msg_rsp;
  81         DataItemSequence        *seq;
  82
  83         if (CORBA::is_nil(response_listener_param) == false) {
  84                 if (_listener != NULL) {
  85                         msg_req = new BusMessageInternal(msg_req_param);
  86                         log_debug("send_dataitem_message_and_request_response(), server_callback != NULL\n");
  87                         log_debug("msg_req:\n");
  88                         msg_req->printout();
  89                         msg_rsp = NULL;
  90                         _listener->request_received(msg_req, &msg_rsp);
  91                         seq     = (DataItemSequence *)msg_rsp->_dataItemSeq;
  92                         log_debug("msg_rsp length: %ld\n", seq->length());
  93                         msg_rsp->printout();
  94                         response_listener_param->receive_response_dataitem_sequence(*seq);
  95                 }
  96                 else {
  97                         log_error("send_dataitem_message_and_request_response() error, server_callback == NULL\n");
  98                 }
  99         }
 100 }
 101
 102 CORBA::Long OrbServerImpl::send_dataitem_message_and_wait_response(const DataItemSequence& req_seq_param,
 103                                                                 DataItemSequence_out rsp_seq_param) {
 104         BusMessage              *msg_req;
 105         BusMessage              *msg_rsp;
 106         DataItemSequence        *seq;
 107
 108         msg_req = new BusMessageInternal(req_seq_param);
 109         msg_rsp = NULL;
 110         _listener->request_received(msg_req, &msg_rsp);
 111         //rsp_seq_param = new DataItemSequence_out(msg_rsp._dataItemSeq);
 112         seq                     = (DataItemSequence *)msg_rsp->_dataItemSeq;
 113         rsp_seq_param._data     = seq;
 114
 115         return 0;
 116 }
 117
 118 void OrbServerImpl::add_event_listener(OrbClient_ptr client_param,
 119                         const char *msg,
 120                         CORBA::UShort period_secs)
 121 {
 122         ServerEventThread       *srvr_thread;
 123
 124         if (CORBA::is_nil(client_param) == false) {
 125                 log_debug("add_event_listener()\n");
 126                 server_thread_mutex.lock();
 127                 _server_thread_count++;
 128                 server_thread_mutex.unlock();
 129                 srvr_thread     = new ServerEventThread(client_param, msg, period_secs, this);
 130                 srvr_thread->start();
 131         }
 132         else {
 133                 cerr << "Failed to add event listener, listener NULL.\n";
 134         }
 135 }
 136
 137 void OrbServerImpl::shutdown()
 138 {
 139         omni_mutex_lock sync(server_thread_mutex);
 140         if (is_shutdown_pending() == 0) {
 141                 cout << "shutdown request received!" << endl;
 142                 // Tell the servers to exit, and wait for them to do so.
 143                 _shutdown_pending       = 1;
 144                 while(_server_thread_count > 0) {
 145                         server_thread_shutdown_signal.wait();
 146                 }
 147                 // Shutdown the ORB (but do not wait for completion).  This also
 148                 // causes the main thread to unblock from CORBA::ORB::run().
 149                 _orb->shutdown(0);
 150         }
 151 }
 152
 153 int OrbServerImpl::init() {
 154         int     argc;
 155         char    **argv;
 156         int     retVal;
 157
 158         argc    = -1;
 159         argv    = NULL;
 160         retVal  = 0;
 161         _orb    = CORBA::ORB_init(argc, argv);
 162         if (_orb != NULL) {
 163                 _poa    = create_poa(_orb);
 164                 retVal  = 0;
 165         }
 166         else {
 167                 cout << "init() failed"  << endl;
 168         }
 169         return retVal;
 170 }
 171
 172 int OrbServerImpl::launch(const char *server_name)
 173 {
 174         CORBA::Object_var               server_ref;
 175         PortableServer::ObjectId_var    server_id;
 176         bool                            ok_flg;
 177         int                             ret_val;
 178         CosNaming::NamingContext_var    naming_context;
 179
 180         ret_val         = -1;
 181         POA_plpbus_orb::OrbServer_tie<OrbServerImpl> server_impl(this);
 182         server_id       = _poa->activate_object(&server_impl);
 183         server_ref      = server_impl._this();
 184         //this->_remove_ref();
 185         naming_context  = get_service_naming_context(CONST_CONTEXT_NAME__PLPBUS, CONST_CONTEXT_KIND__PLPBUS);
 186         if (naming_context != NULL) {
 187                 ok_flg  = bind_naming_context_and_service(naming_context,
 188                                                         server_ref,
 189                                                         server_name,
 190                                                         CONST_CONTEXT_KIND__PLPBUS);
 191                 if (ok_flg == true) {
 192                         cout << "Registered to naming service: " << server_name << endl;
 193                         _orb->run();
 194                         ret_val = 0;
 195                 }
 196                 else {
 197                         cout << "Failed to register to naming service: " << server_name << endl;
 198                 }
 199         }
 200         return ret_val;
 201 }
 202
 203 PortableServer::POA_var OrbServerImpl::create_poa(CORBA::ORB_var orb) {
 204         PortableServer::POA_var         ret_val;
 205         CORBA::Object_var               poa_obj;
 206         CORBA::PolicyList               policy_list;
 207         CORBA::Any                      policyVal;
 208         PortableServer::POAManager_var  poa_man;
 209         PortableServer::POA_var         rootpoa;
 210
 211         ret_val = NULL;
 212         poa_obj = orb->resolve_initial_references(CONST_ROOT_POA_NAME);
 213         if (poa_obj != NULL) {
 214                 rootpoa = PortableServer::POA::_narrow(poa_obj);
 215                 if (rootpoa != NULL) {
 216                         poa_man = rootpoa->the_POAManager();
 217                         if (poa_man != NULL) {
 218                                 poa_man->activate();
 219                                 // bidirectional policy
 220                                 policy_list.length(1);
 221                                 policyVal       <<= BiDirPolicy::BOTH;
 222                                 policy_list[0] = orb->create_policy(BiDirPolicy::BIDIRECTIONAL_POLICY_TYPE, policyVal);
 223                                 ret_val = rootpoa->create_POA(CONST_ROOT_POA_BIDIR_POLICY_NAME,
 224                                                         poa_man,
 225                                                         policy_list);
 226                         }
 227                 }
 228         }
 229         else {
 230                 cerr << "Failed to create RootPOA." << endl;
 231         }
 232         return ret_val;
 233 }
 234
 235 CosNaming::NamingContext_var OrbServerImpl::get_service_naming_context(const char *service_name_param,
 236                                                                 const char *service_kind_param)
 237 {
 238         CosNaming::NamingContext_var    ret_val;
 239         CosNaming::NamingContext_var    ns_context;
 240         CORBA::Object_var               ns_obj;
 241         CORBA::Object_var               service_obj;
 242         CosNaming::Name                 context_data;
 243
 244         ret_val = NULL;
 245         try {
 246                 // get nameservice reference
 247                 log_debug("get_service_naming_context() 1\n");
 248                 ns_obj          = _orb->resolve_initial_references(CONST_NAME_SERVICE_NAME);
 249                 log_debug("get_service_naming_context() 2\n");
 250                 // get name service context
 251                 ns_context      = CosNaming::NamingContext::_narrow(ns_obj);
 252                 log_debug("get_service_naming_context() 3\n");
 253                 if (CORBA::is_nil(ns_context) == false) {
 254                         context_data.length(1);
 255                         context_data[0].id      = service_name_param;
 256                         context_data[0].kind    = service_kind_param;
 257                         log_debug("get_service_naming_context() 4\n");
 258                         try {
 259                                 service_obj     = ns_context->resolve(context_data);
 260                         }
 261                         catch(CosNaming::NamingContext::NotFound& ex) {
 262                                 log_error("Failed to get context from name service for %s. Context does not yet exist, but will try to create.\n", service_name_param);
 263                         }
 264                         try {
 265                                 log_debug("get_service_naming_context() 5\n");
 266                                 if (CORBA::is_nil(service_obj)) {
 267                                         // not found, try to bind the new context to name service
 268                                         log_debug("get_service_naming_context() 6\n");
 269                                         ret_val = ns_context->bind_new_context(context_data);
 270                                         log_debug("get_service_naming_context() 7\n");
 271                                         if (CORBA::is_nil(ret_val) ) {
 272                                                 log_error("Failed to create new context to name service for %s.\n", service_name_param);
 273                                         }
 274                                 }
 275                                 else {
 276                                         log_debug("get_service_naming_context() 8\n");
 277                                         ret_val = CosNaming::NamingContext::_narrow(service_obj);
 278                                         log_debug("get_service_naming_context() 9\n");
 279                                         if (CORBA::is_nil(ret_val) ) {
 280                                                 log_error("Failed to get existing context from name service for %s, narrowing failed.\n", service_name_param);
 281                                         }
 282                                 }
 283                         }
 284                         catch(CosNaming::NamingContext::AlreadyBound& ex) {
 285                                 log_error("Failed to get context from name service for %s. Context with same name already exist.\n", service_name_param);
 286                         }
 287                 }
 288         }
 289         catch (CORBA::ORB::InvalidName&) {
 290                 // This should not happen!
 291                 log_error("Failed to get context from name service for %s, name service does not exist.\n", service_name_param);
 292         }
 293         catch(CORBA::TRANSIENT& ex) {
 294                 log_error("Failed to get context from name service for %s, verify that name service is running.\n", service_name_param);
 295         }
 296         catch (CORBA::NO_RESOURCES&) {
 297                 log_error("Failed to get context from name service for %s, Name service is not running or has configuration problem.\n", service_name_param);
 298                 log_error("Check-list:\n");
 299                 log_error("If you have OMNIORB_CONFIG environment variable defined, verify that omniORB.cfg file exist in that location.\n");
 300                 log_error("If you do not have OMNIORB_CONFIG environment variable defined, verify that you have /etc/omniORB.cfg file\n");
 301                 log_error("Verify that InitRef line is defined in omniORB.cfg file.\n");
 302         }
 303         catch(CORBA::SystemException& ex) {
 304                 log_error("Failed to get context from name service for %s, system error.\n", service_name_param);
 305         }
 306         log_debug("get_service_naming_context() done\n");
 307         return ret_val;
 308 }
 309
 310 bool OrbServerImpl::bind_naming_context_and_service(CosNaming::NamingContext_var service_context_param,
 311                                         CORBA::Object_ptr service_ref_param,
 312                                         const char *service_name_param,
 313                                         const char *service_kind_param)
 314 {
 315         bool            retVal;
 316         CosNaming::Name context_data;
 317
 318         retVal = false;
 319         try {
 320                 context_data.length(1);
 321                 context_data[0].id   = service_name_param;
 322                 context_data[0].kind = service_kind_param;
 323                 try {
 324                         service_context_param->bind(context_data, service_ref_param);
 325                         retVal  = true;
 326                 }
 327                 catch(CosNaming::NamingContext::AlreadyBound& ex) {
 328                         /**
 329                          * service existed already for the naming context with similar description.
 330                          * Replace the existing one with a new one.
 331                          */
 332                         cout << "service " << service_name_param << " existed, replacing it." << endl;
 333                         service_context_param->rebind(context_data, service_ref_param);
 334                         retVal  = true;
 335                 }
 336         }
 337         catch (CosNaming::NamingContext::InvalidName&) {
 338                 cerr << "Could not register service to name server, invalid service name." << endl;
 339         }
 340         catch (CosNaming::NamingContext::NotFound&) {
 341                 cerr << "Could not register service to name server, service object reference is invalid." << endl;
 342         }
 343         catch (CosNaming::NamingContext::CannotProceed&) {
 344                 // This should not happen!
 345                 cerr << "Could not register service to name server, unknown error." << endl;
 346         }
 347         catch(CORBA::SystemException& ex) {
 348                 cerr << "Could not register service to name server, unknown error." << endl;
 349         }
 350         return retVal;
 351 }
 352
 353 int OrbServerImpl::add_server_listener(IServerListener *listener_param)
 354 {
 355         int     retVal;
 356
 357         retVal          = 0;
 358         cout << "register_request_received_callback() started"  << endl;
 359         _listener       = listener_param;
 360         cout << "register_callback() done"  << endl;
 361         return retVal;
 362 }
 363
 364 int OrbServerImpl::is_shutdown_pending() {
 365         return _shutdown_pending;
 366 }
 367
 368 void OrbServerImpl::server_thread_closed() {
 369         bool send_signal = false;
 370
 371         server_thread_mutex.lock();
 372         _server_thread_count--;
 373         if (_server_thread_count == 0) {
 374                 send_signal     = true;
 375         }
 376         server_thread_mutex.unlock();
 377         if (send_signal == true) {
 378                 server_thread_shutdown_signal.signal();
 379         }
 380 }