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         }
  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         int                     err_flg;
  83
  84         if (CORBA::is_nil(response_listener_param) == false) {
  85                 if (_listener != NULL) {
  86                         msg_req = new BusMessageInternal(msg_req_param);
  87                         log_debug("send_dataitem_message_and_request_response(), server_callback != NULL\n");
  88                         log_debug("msg_req:\n");
  89                         msg_req->printout();
  90                         msg_rsp = NULL;
  91                         err_flg = 0;
  92                         msg_rsp = new BusMessage(msg_req->get_type(&err_flg));
  93                         _listener->request_received(msg_req, msg_rsp);
  94                         seq     = (DataItemSequence *)msg_rsp->_dataItemSeq;
  95                         log_debug("msg_rsp length: %ld\n", seq->length());
  96                         msg_rsp->printout();
  97                         response_listener_param->receive_response_dataitem_sequence(*seq);
  98                         delete(msg_req);
  99                         delete(msg_rsp);
 100                 }
 101                 else {
 102                         log_error("send_dataitem_message_and_request_response() error, server_callback == NULL\n");
 103                 }
 104         }
 105 }
 106
 107 CORBA::Long OrbServerImpl::send_dataitem_message_and_wait_response(const DataItemSequence& req_seq_param,
 108                                                                 DataItemSequence_out rsp_seq_param) {
 109         BusMessage              *msg_req;
 110         BusMessage              *msg_rsp;
 111         DataItemSequence        *seq;
 112         int                     err_flg;
 113
 114         seq     = NULL;
 115         msg_rsp = NULL;
 116         msg_req = new BusMessageInternal(req_seq_param);
 117         msg_rsp = new BusMessage(msg_req->get_type(&err_flg));
 118         _listener->request_received(msg_req, msg_rsp);
 119         if (msg_rsp != NULL) {
 120                 seq     = (DataItemSequence *)msg_rsp->_dataItemSeq;
 121         }
 122         else {
 123                 seq     = new DataItemSequence();
 124         }
 125         rsp_seq_param._data     = seq;
 126
 127         return 0;
 128 }
 129
 130 void OrbServerImpl::add_event_listener(OrbClient_ptr client_param,
 131                         const char *msg,
 132                         CORBA::UShort period_secs)
 133 {
 134         ServerEventThread       *srvr_thread;
 135
 136         if (CORBA::is_nil(client_param) == false) {
 137                 log_debug("add_event_listener()\n");
 138                 server_thread_mutex.lock();
 139                 _server_thread_count++;
 140                 server_thread_mutex.unlock();
 141                 srvr_thread     = new ServerEventThread(client_param, msg, period_secs, this);
 142                 srvr_thread->start();
 143         }
 144         else {
 145                 log_error("Failed to add event listener, listener NULL.\n");
 146         }
 147 }
 148
 149 void OrbServerImpl::shutdown()
 150 {
 151         omni_mutex_lock sync(server_thread_mutex);
 152         if (is_shutdown_pending() == 0) {
 153                 log_debug("shutdown request received!\n");
 154                 // Tell the servers to exit, and wait for them to do so.
 155                 _shutdown_pending       = 1;
 156                 while(_server_thread_count > 0) {
 157                         server_thread_shutdown_signal.timedwait(5, 0);
 158                         log_debug("signal received\n");
 159                 }
 160                 // Shutdown the ORB (but do not wait for completion).  This also
 161                 // causes the main thread to unblock from CORBA::ORB::run().
 162                 log_debug("calling orb shutdown\n");
 163                 _orb->shutdown(0);
 164                 log_debug("orb shutdown called\n");
 165         }
 166 }
 167
 168 int OrbServerImpl::init() {
 169         int     argc;
 170         char    **argv;
 171         int     retVal;
 172
 173         argc    = -1;
 174         argv    = NULL;
 175         retVal  = 0;
 176         _orb    = CORBA::ORB_init(argc, argv);
 177         if (_orb != NULL) {
 178                 _poa    = create_poa(_orb);
 179                 retVal  = 0;
 180         }
 181         else {
 182                 log_error("init() failed\n");
 183         }
 184         return retVal;
 185 }
 186
 187 int OrbServerImpl::launch(const char *server_name)
 188 {
 189         CORBA::Object_var               server_ref;
 190         PortableServer::ObjectId_var    server_id;
 191         bool                            ok_flg;
 192         int                             ret_val;
 193         CosNaming::NamingContext_var    naming_context;
 194
 195         ret_val         = -1;
 196         POA_plpbus_orb::OrbServer_tie<OrbServerImpl> server_impl(this);
 197         server_id       = _poa->activate_object(&server_impl);
 198         server_ref      = server_impl._this();
 199         //this->_remove_ref();
 200         naming_context  = get_service_naming_context(CONST_CONTEXT_NAME__PLPBUS, CONST_CONTEXT_KIND__PLPBUS);
 201         if (naming_context != NULL) {
 202                 ok_flg  = bind_naming_context_and_service(naming_context,
 203                                                         server_ref,
 204                                                         server_name,
 205                                                         CONST_CONTEXT_KIND__PLPBUS);
 206                 if (ok_flg == true) {
 207                         log_debug("Registered to naming service: %s\n", server_name);
 208                         _orb->run();
 209                         ret_val = 0;
 210                 }
 211                 else {
 212                         log_error("Failed to register to naming service: %s\n", server_name);
 213                 }
 214         }
 215         return ret_val;
 216 }
 217
 218 PortableServer::POA_var OrbServerImpl::create_poa(CORBA::ORB_var orb) {
 219         PortableServer::POA_var         ret_val;
 220         CORBA::Object_var               poa_obj;
 221         CORBA::PolicyList               policy_list;
 222         CORBA::Any                      policyVal;
 223         PortableServer::POAManager_var  poa_man;
 224         PortableServer::POA_var         rootpoa;
 225
 226         ret_val = NULL;
 227         poa_obj = orb->resolve_initial_references(CONST_ROOT_POA_NAME);
 228         if (poa_obj != NULL) {
 229                 rootpoa = PortableServer::POA::_narrow(poa_obj);
 230                 if (rootpoa != NULL) {
 231                         poa_man = rootpoa->the_POAManager();
 232                         if (poa_man != NULL) {
 233                                 poa_man->activate();
 234                                 // bidirectional policy
 235                                 policy_list.length(1);
 236                                 policyVal       <<= BiDirPolicy::BOTH;
 237                                 policy_list[0] = orb->create_policy(BiDirPolicy::BIDIRECTIONAL_POLICY_TYPE, policyVal);
 238                                 ret_val = rootpoa->create_POA(CONST_ROOT_POA_BIDIR_POLICY_NAME,
 239                                                         poa_man,
 240                                                         policy_list);
 241                         }
 242                 }
 243         }
 244         else {
 245                 log_error("Failed to create RootPOA.\n");
 246         }
 247         return ret_val;
 248 }
 249
 250 CosNaming::NamingContext_var OrbServerImpl::get_service_naming_context(const char *service_name_param,
 251                                                                 const char *service_kind_param)
 252 {
 253         CosNaming::NamingContext_var    ret_val;
 254         CosNaming::NamingContext_var    ns_context;
 255         CORBA::Object_var               ns_obj;
 256         CORBA::Object_var               service_obj;
 257         CosNaming::Name                 context_data;
 258
 259         ret_val = NULL;
 260         try {
 261                 // get nameservice reference
 262                 log_debug("get_service_naming_context() 1\n");
 263                 ns_obj          = _orb->resolve_initial_references(CONST_NAME_SERVICE_NAME);
 264                 log_debug("get_service_naming_context() 2\n");
 265                 // get name service context
 266                 ns_context      = CosNaming::NamingContext::_narrow(ns_obj);
 267                 log_debug("get_service_naming_context() 3\n");
 268                 if (CORBA::is_nil(ns_context) == false) {
 269                         context_data.length(1);
 270                         context_data[0].id      = service_name_param;
 271                         context_data[0].kind    = service_kind_param;
 272                         log_debug("get_service_naming_context() 4\n");
 273                         try {
 274                                 service_obj     = ns_context->resolve(context_data);
 275                         }
 276                         catch(CosNaming::NamingContext::NotFound& ex) {
 277                                 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);
 278                         }
 279                         try {
 280                                 log_debug("get_service_naming_context() 5\n");
 281                                 if (CORBA::is_nil(service_obj)) {
 282                                         // not found, try to bind the new context to name service
 283                                         log_debug("get_service_naming_context() 6\n");
 284                                         ret_val = ns_context->bind_new_context(context_data);
 285                                         log_debug("get_service_naming_context() 7\n");
 286                                         if (CORBA::is_nil(ret_val) ) {
 287                                                 log_error("Failed to create new context to name service for %s.\n", service_name_param);
 288                                         }
 289                                 }
 290                                 else {
 291                                         log_debug("get_service_naming_context() 8\n");
 292                                         ret_val = CosNaming::NamingContext::_narrow(service_obj);
 293                                         log_debug("get_service_naming_context() 9\n");
 294                                         if (CORBA::is_nil(ret_val) ) {
 295                                                 log_error("Failed to get existing context from name service for %s, narrowing failed.\n", service_name_param);
 296                                         }
 297                                 }
 298                         }
 299                         catch(CosNaming::NamingContext::AlreadyBound& ex) {
 300                                 log_error("Failed to get context from name service for %s. Context with same name already exist.\n", service_name_param);
 301                         }
 302                 }
 303         }
 304         catch (CORBA::ORB::InvalidName&) {
 305                 // This should not happen!
 306                 log_error("Failed to get context from name service for %s, name service does not exist.\n", service_name_param);
 307         }
 308         catch(CORBA::TRANSIENT& ex) {
 309                 log_error("Failed to get context from name service for %s, verify that name service is running.\n", service_name_param);
 310         }
 311         catch (CORBA::NO_RESOURCES&) {
 312                 log_error("Failed to get context from name service for %s, Name service is not running or has configuration problem.\n", service_name_param);
 313                 log_error("Check-list:\n");
 314                 log_error("If you have OMNIORB_CONFIG environment variable defined, verify that omniORB.cfg file exist in that location.\n");
 315                 log_error("If you do not have OMNIORB_CONFIG environment variable defined, verify that you have /etc/omniORB.cfg file\n");
 316                 log_error("Verify that InitRef line is defined in omniORB.cfg file.\n");
 317         }
 318         catch(CORBA::SystemException& ex) {
 319                 log_error("Failed to get context from name service for %s, system error.\n", service_name_param);
 320         }
 321         log_debug("get_service_naming_context() done\n");
 322         return ret_val;
 323 }
 324
 325 bool OrbServerImpl::bind_naming_context_and_service(CosNaming::NamingContext_var service_context_param,
 326                                         CORBA::Object_ptr service_ref_param,
 327                                         const char *service_name_param,
 328                                         const char *service_kind_param)
 329 {
 330         bool            retVal;
 331         CosNaming::Name context_data;
 332
 333         retVal = false;
 334         try {
 335                 context_data.length(1);
 336                 context_data[0].id   = service_name_param;
 337                 context_data[0].kind = service_kind_param;
 338                 try {
 339                         service_context_param->bind(context_data, service_ref_param);
 340                         retVal  = true;
 341                 }
 342                 catch(CosNaming::NamingContext::AlreadyBound& ex) {
 343                         /**
 344                          * service existed already for the naming context with similar description.
 345                          * Replace the existing one with a new one.
 346                          */
 347                         log_warning("service %s exist, replacing it\n", service_name_param);
 348                         service_context_param->rebind(context_data, service_ref_param);
 349                         retVal  = true;
 350                 }
 351         }
 352         catch (CosNaming::NamingContext::InvalidName&) {
 353                 log_error("Could not register service to name server, invalid service name.\n");
 354         }
 355         catch (CosNaming::NamingContext::NotFound&) {
 356                 log_error("Could not register service to name server, service object reference is invalid.\n");
 357         }
 358         catch (CosNaming::NamingContext::CannotProceed&) {
 359                 // This should not happen!
 360                 log_error("Could not register service to name server, unknown error.\n");
 361         }
 362         catch(CORBA::SystemException& ex) {
 363                 log_error("Could not register service to name server, unknown error.\n");
 364         }
 365         return retVal;
 366 }
 367
 368 int OrbServerImpl::add_server_listener(IServerListener *listener_param)
 369 {
 370         int     retVal;
 371
 372         retVal          = 0;
 373         log_debug("register_request_received_callback() started\n");
 374         _listener       = listener_param;
 375         return retVal;
 376 }
 377
 378 int OrbServerImpl::is_shutdown_pending() {
 379         return _shutdown_pending;
 380 }
 381
 382 void OrbServerImpl::server_thread_closed() {
 383         bool    send_signal;
 384
 385         log_debug("server_thread_closed() started\n");
 386         send_signal = false;
 387         server_thread_mutex.lock();
 388         log_debug("server_thread_closed(), server_thread_count: %d\n", _server_thread_count);
 389         _server_thread_count--;
 390         if (_server_thread_count == 0) {
 391                 send_signal     = true;
 392         }
 393         server_thread_mutex.unlock();
 394         if (send_signal == true) {
 395                 log_debug("server_thread_closed(), sending signal\n");
 396                 server_thread_shutdown_signal.signal();
 397                 log_debug("server_thread_closed(), signal send\n");
 398         }
 399 }