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         const 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         const 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                 //ret_val       = CORBA::string_dup(msg_rsp);
  68                 ret_val = CORBA::string_dup(msg_rsp);
  69         }
  70         else {
  71                 log_error("send_message_and_wait_response() error, server callback == NULL\n");
  72                 ret_val = CORBA::string_dup(msg_req_param);
  73                 err_flg = -1;
  74         }
  75         return ret_val;
  76 }
  77
  78 void OrbServerImpl::send_dataitem_message_and_request_response(OrbClient_ptr response_listener_param,
  79                                                         const ::DataItemSequence& msg_req_param) {
  80         BusMessage              *msg_req;
  81         BusMessage              *msg_rsp;
  82         DataItemSequence        *seq;
  83         int                     err_flg;
  84
  85         if (CORBA::is_nil(response_listener_param) == false) {
  86                 if (_listener != NULL) {
  87                         msg_req = new BusMessageInternal(msg_req_param);
  88                         log_debug("send_dataitem_message_and_request_response(), server_callback != NULL\n");
  89                         log_debug("msg_req:\n");
  90                         msg_req->printout();
  91                         msg_rsp = NULL;
  92                         err_flg = 0;
  93                         msg_rsp = new BusMessage(msg_req->get_type(&err_flg));
  94                         _listener->request_received(msg_req, msg_rsp);
  95                         seq     = (DataItemSequence *)msg_rsp->_dataItemSeq;
  96                         log_debug("msg_rsp length: %ld\n", seq->length());
  97                         msg_rsp->printout();
  98                         response_listener_param->receive_response_dataitem_sequence(*seq);
  99                         delete(msg_req);
 100                         delete(msg_rsp);
 101                 }
 102                 else {
 103                         log_error("send_dataitem_message_and_request_response() error, server_callback == NULL\n");
 104                 }
 105         }
 106 }
 107
 108 CORBA::Long OrbServerImpl::send_dataitem_message_and_wait_response(const DataItemSequence& req_seq_param,
 109                                                                 DataItemSequence_out rsp_seq_param) {
 110         BusMessage              *msg_req;
 111         BusMessage              *msg_rsp;
 112         DataItemSequence        *seq;
 113         int                     err_flg;
 114
 115         seq     = NULL;
 116         msg_rsp = NULL;
 117         msg_req = new BusMessageInternal(req_seq_param);
 118         msg_rsp = new BusMessage(msg_req->get_type(&err_flg));
 119         _listener->request_received(msg_req, msg_rsp);
 120         if (msg_rsp != NULL) {
 121                 seq     = (DataItemSequence *)msg_rsp->_dataItemSeq;
 122         }
 123         else {
 124                 seq     = new DataItemSequence();
 125         }
 126         rsp_seq_param._data     = seq;
 127
 128         return 0;
 129 }
 130
 131 void OrbServerImpl::add_event_listener(OrbClient_ptr client_param,
 132                         const char *msg,
 133                         CORBA::UShort period_secs)
 134 {
 135         ServerEventThread       *srvr_thread;
 136
 137         if (CORBA::is_nil(client_param) == false) {
 138                 log_debug("add_event_listener()\n");
 139                 server_thread_mutex.lock();
 140                 _server_thread_count++;
 141                 server_thread_mutex.unlock();
 142                 srvr_thread     = new ServerEventThread(client_param, msg, period_secs, this);
 143                 srvr_thread->start();
 144         }
 145         else {
 146                 log_error("Failed to add event listener, listener NULL.\n");
 147         }
 148 }
 149
 150 void OrbServerImpl::shutdown()
 151 {
 152         omni_mutex_lock sync(server_thread_mutex);
 153         if (is_shutdown_pending() == 0) {
 154                 log_debug("shutdown request received!\n");
 155                 // Tell the servers to exit, and wait for them to do so.
 156                 _shutdown_pending       = 1;
 157                 while(_server_thread_count > 0) {
 158                         server_thread_shutdown_signal.timedwait(5, 0);
 159                         log_debug("signal received\n");
 160                 }
 161                 // Shutdown the ORB (but do not wait for completion).  This also
 162                 // causes the main thread to unblock from CORBA::ORB::run().
 163                 log_debug("calling orb shutdown\n");
 164                 _orb->shutdown(0);
 165                 log_debug("orb shutdown called\n");
 166         }
 167 }
 168
 169 int OrbServerImpl::init() {
 170         int     argc;
 171         char    **argv;
 172         int     retVal;
 173
 174         argc    = -1;
 175         argv    = NULL;
 176         retVal  = 0;
 177         _orb    = CORBA::ORB_init(argc, argv);
 178         if (_orb != NULL) {
 179                 _poa    = create_poa(_orb);
 180                 retVal  = 0;
 181         }
 182         else {
 183                 log_error("init() failed\n");
 184         }
 185         return retVal;
 186 }
 187
 188 int OrbServerImpl::launch(const char *server_name)
 189 {
 190         CORBA::Object_var               server_ref;
 191         PortableServer::ObjectId_var    server_id;
 192         bool                            ok_flg;
 193         int                             ret_val;
 194         CosNaming::NamingContext_var    naming_context;
 195
 196         ret_val         = -1;
 197         POA_plpbus_orb::OrbServer_tie<OrbServerImpl> server_impl(this);
 198         server_id       = _poa->activate_object(&server_impl);
 199         server_ref      = server_impl._this();
 200         //this->_remove_ref();
 201         naming_context  = get_service_naming_context(CONST_CONTEXT_NAME__PLPBUS, CONST_CONTEXT_KIND__PLPBUS);
 202         if (naming_context != NULL) {
 203                 ok_flg  = bind_naming_context_and_service(naming_context,
 204                                                         server_ref,
 205                                                         server_name,
 206                                                         CONST_CONTEXT_KIND__PLPBUS);
 207                 if (ok_flg == true) {
 208                         log_debug("Registered to naming service: %s\n", server_name);
 209                         _orb->run();
 210                         ret_val = 0;
 211                 }
 212                 else {
 213                         log_error("Failed to register to naming service: %s\n", server_name);
 214                 }
 215         }
 216         return ret_val;
 217 }
 218
 219 PortableServer::POA_var OrbServerImpl::create_poa(CORBA::ORB_var orb) {
 220         PortableServer::POA_var         ret_val;
 221         CORBA::Object_var               poa_obj;
 222         CORBA::PolicyList               policy_list;
 223         CORBA::Any                      policyVal;
 224         PortableServer::POAManager_var  poa_man;
 225         PortableServer::POA_var         rootpoa;
 226
 227         ret_val = NULL;
 228         poa_obj = orb->resolve_initial_references(CONST_ROOT_POA_NAME);
 229         if (poa_obj != NULL) {
 230                 rootpoa = PortableServer::POA::_narrow(poa_obj);
 231                 if (rootpoa != NULL) {
 232                         poa_man = rootpoa->the_POAManager();
 233                         if (poa_man != NULL) {
 234                                 poa_man->activate();
 235                                 // bidirectional policy
 236                                 policy_list.length(1);
 237                                 policyVal       <<= BiDirPolicy::BOTH;
 238                                 policy_list[0] = orb->create_policy(BiDirPolicy::BIDIRECTIONAL_POLICY_TYPE, policyVal);
 239                                 ret_val = rootpoa->create_POA(CONST_ROOT_POA_BIDIR_POLICY_NAME,
 240                                                         poa_man,
 241                                                         policy_list);
 242                         }
 243                 }
 244         }
 245         else {
 246                 log_error("Failed to create RootPOA.\n");
 247         }
 248         return ret_val;
 249 }
 250
 251 CosNaming::NamingContext_var OrbServerImpl::get_service_naming_context(const char *service_name_param,
 252                                                                 const char *service_kind_param)
 253 {
 254         CosNaming::NamingContext_var    ret_val;
 255         CosNaming::NamingContext_var    ns_context;
 256         CORBA::Object_var               ns_obj;
 257         CORBA::Object_var               service_obj;
 258         CosNaming::Name                 context_data;
 259
 260         ret_val = NULL;
 261         try {
 262                 // get nameservice reference
 263                 log_debug("get_service_naming_context() 1\n");
 264                 ns_obj          = _orb->resolve_initial_references(CONST_NAME_SERVICE_NAME);
 265                 log_debug("get_service_naming_context() 2\n");
 266                 // get name service context
 267                 ns_context      = CosNaming::NamingContext::_narrow(ns_obj);
 268                 log_debug("get_service_naming_context() 3\n");
 269                 if (CORBA::is_nil(ns_context) == false) {
 270                         context_data.length(1);
 271                         context_data[0].id      = service_name_param;
 272                         context_data[0].kind    = service_kind_param;
 273                         log_debug("get_service_naming_context() 4\n");
 274                         try {
 275                                 service_obj     = ns_context->resolve(context_data);
 276                         }
 277                         catch(CosNaming::NamingContext::NotFound& ex) {
 278                                 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);
 279                         }
 280                         try {
 281                                 log_debug("get_service_naming_context() 5\n");
 282                                 if (CORBA::is_nil(service_obj)) {
 283                                         // not found, try to bind the new context to name service
 284                                         log_debug("get_service_naming_context() 6\n");
 285                                         ret_val = ns_context->bind_new_context(context_data);
 286                                         log_debug("get_service_naming_context() 7\n");
 287                                         if (CORBA::is_nil(ret_val) ) {
 288                                                 log_error("Failed to create new context to name service for %s.\n", service_name_param);
 289                                         }
 290                                 }
 291                                 else {
 292                                         ret_val = CosNaming::NamingContext::_narrow(service_obj);
 293                                         if (CORBA::is_nil(ret_val) ) {
 294                                                 log_error("Failed to get existing context from name service for %s, narrowing failed.\n", service_name_param);
 295                                         }
 296                                 }
 297                         }
 298                         catch(CosNaming::NamingContext::AlreadyBound& ex) {
 299                                 log_error("Failed to get context from name service for %s. Context with same name already exist.\n", service_name_param);
 300                         }
 301                 }
 302         }
 303         catch (CORBA::ORB::InvalidName&) {
 304                 // This should not happen!
 305                 log_error("Failed to get context from name service for %s, name service does not exist.\n", service_name_param);
 306         }
 307         catch(CORBA::TRANSIENT& ex) {
 308                 log_error("Failed to get context from name service for %s, verify that name service is running.\n", service_name_param);
 309         }
 310         catch (CORBA::NO_RESOURCES&) {
 311                 log_error("Failed to get context from name service for %s, Name service is not running or has configuration problem.\n", service_name_param);
 312                 log_error("Check-list:\n");
 313                 log_error("If you have OMNIORB_CONFIG environment variable defined, verify that omniORB.cfg file exist in that location.\n");
 314                 log_error("If you do not have OMNIORB_CONFIG environment variable defined, verify that you have /etc/omniORB.cfg file\n");
 315                 log_error("Verify that InitRef line is defined in omniORB.cfg file.\n");
 316         }
 317         catch(CORBA::SystemException& ex) {
 318                 log_error("Failed to get context from name service for %s, system error.\n", service_name_param);
 319         }
 320         log_debug("get_service_naming_context() done\n");
 321         return ret_val;
 322 }
 323
 324 bool OrbServerImpl::bind_naming_context_and_service(CosNaming::NamingContext_var service_context_param,
 325                                         CORBA::Object_ptr service_ref_param,
 326                                         const char *service_name_param,
 327                                         const char *service_kind_param)
 328 {
 329         bool            retVal;
 330         CosNaming::Name context_data;
 331
 332         retVal = false;
 333         try {
 334                 context_data.length(1);
 335                 context_data[0].id   = service_name_param;
 336                 context_data[0].kind = service_kind_param;
 337                 try {
 338                         service_context_param->bind(context_data, service_ref_param);
 339                         retVal  = true;
 340                 }
 341                 catch(CosNaming::NamingContext::AlreadyBound& ex) {
 342                         /**
 343                          * service existed already for the naming context with similar description.
 344                          * Replace the existing one with a new one.
 345                          */
 346                         log_warning("service %s exist, replacing it\n", service_name_param);
 347                         service_context_param->rebind(context_data, service_ref_param);
 348                         retVal  = true;
 349                 }
 350         }
 351         catch (CosNaming::NamingContext::InvalidName&) {
 352                 log_error("Could not register service to name server, invalid service name.\n");
 353         }
 354         catch (CosNaming::NamingContext::NotFound&) {
 355                 log_error("Could not register service to name server, service object reference is invalid.\n");
 356         }
 357         catch (CosNaming::NamingContext::CannotProceed&) {
 358                 // This should not happen!
 359                 log_error("Could not register service to name server, unknown error.\n");
 360         }
 361         catch(CORBA::SystemException& ex) {
 362                 log_error("Could not register service to name server, unknown error.\n");
 363         }
 364         return retVal;
 365 }
 366
 367 int OrbServerImpl::add_server_listener(IServerListener *listener_param)
 368 {
 369         int     retVal;
 370
 371         retVal          = 0;
 372         log_debug("register_request_received_callback() started\n");
 373         _listener       = listener_param;
 374         return retVal;
 375 }
 376
 377 int OrbServerImpl::is_shutdown_pending() {
 378         return _shutdown_pending;
 379 }
 380
 381 void OrbServerImpl::server_thread_closed() {
 382         bool    send_signal;
 383
 384         log_debug("server_thread_closed() started\n");
 385         send_signal = false;
 386         server_thread_mutex.lock();
 387         log_debug("server_thread_closed(), server_thread_count: %d\n", _server_thread_count);
 388         _server_thread_count--;
 389         if (_server_thread_count == 0) {
 390                 send_signal     = true;
 391         }
 392         server_thread_mutex.unlock();
 393         if (send_signal == true) {
 394                 log_debug("server_thread_closed(), sending signal\n");
 395                 server_thread_shutdown_signal.signal();
 396                 log_debug("server_thread_closed(), signal send\n");
 397         }
 398 }