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