+yf::Virt_db::BackendPtr yf::Virt_db::Frontend::lookup_backend_from_databases(
+ std::list<std::string> databases)
+{
+ std::list<BackendPtr>::const_iterator map_it;
+ map_it = m_backend_list.begin();
+ for (; map_it != m_backend_list.end(); map_it++)
+ if ((*map_it)->m_frontend_databases == databases)
+ return *map_it;
+ BackendPtr null;
+ return null;
+}
+
+yf::Virt_db::BackendPtr yf::Virt_db::Frontend::create_backend_from_databases(
+ std::list<std::string> databases, std::string &failing_database)
+{
+ BackendPtr b(new Backend);
+ std::list<std::string>::const_iterator db_it = databases.begin();
+
+ b->m_number_of_sets = 0;
+ b->m_frontend_databases = databases;
+ b->m_named_result_sets = false;
+
+ std::map<std::string,bool> targets_dedup;
+ for (; db_it != databases.end(); db_it++)
+ {
+ std::map<std::string, Virt_db::Map>::iterator map_it;
+ map_it = m_p->m_maps.find(*db_it);
+ if (map_it == m_p->m_maps.end()) // database not found
+ {
+ failing_database = *db_it;
+ BackendPtr ptr;
+ return ptr;
+ }
+ std::list<std::string>::const_iterator t_it =
+ map_it->second.m_targets.begin();
+ for (; t_it != map_it->second.m_targets.end(); t_it++)
+ targets_dedup[*t_it] = true;
+ b->m_route = map_it->second.m_route;
+ }
+ std::map<std::string,bool>::const_iterator tm_it = targets_dedup.begin();
+ for (; tm_it != targets_dedup.end(); tm_it++)
+ b->m_targets.push_back(tm_it->first);
+
+ return b;
+}
+
+yf::Virt_db::BackendPtr yf::Virt_db::Frontend::init_backend(
+ std::list<std::string> databases, Package &package,
+ int &error_code, std::string &addinfo)
+{
+ std::string failing_database;
+ BackendPtr b = create_backend_from_databases(databases, failing_database);
+ if (!b)
+ {
+ error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
+ addinfo = failing_database;
+ return b;
+ }
+ Package init_package(b->m_backend_session, package.origin());
+ init_package.copy_filter(package);
+
+ yp2::odr odr;
+
+ Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
+
+ std::list<std::string>::const_iterator t_it = b->m_targets.begin();
+ int cat = 1;
+ for (; t_it != b->m_targets.end(); t_it++, cat++)
+ {
+ yaz_oi_set_string_oidval(&init_apdu->u.initRequest->otherInfo, odr,
+ VAL_PROXY, cat, t_it->c_str());
+ }
+
+ Z_InitRequest *req = init_apdu->u.initRequest;
+
+ ODR_MASK_SET(req->options, Z_Options_search);
+ ODR_MASK_SET(req->options, Z_Options_present);
+ ODR_MASK_SET(req->options, Z_Options_namedResultSets);
+ ODR_MASK_SET(req->options, Z_Options_scan);
+
+ ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
+ ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
+ ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
+
+ init_package.request() = init_apdu;
+
+ init_package.move(b->m_route); // sending init
+
+ if (init_package.session().is_closed())
+ {
+ error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
+ // addinfo = database;
+ BackendPtr null;
+ return null;
+ }
+ Z_GDU *gdu = init_package.response().get();
+ // we hope to get an init response
+ if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
+ Z_APDU_initResponse)
+ {
+ if (ODR_MASK_GET(gdu->u.z3950->u.initResponse->options,
+ Z_Options_namedResultSets))
+ {
+ b->m_named_result_sets = true;
+ }
+ }
+ else
+ {
+ error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
+ // addinfo = database;
+ BackendPtr null;
+ return null;
+ }
+ m_backend_list.push_back(b);
+ return b;
+}
+
+void yf::Virt_db::Frontend::search(Package &package, Z_APDU *apdu_req)