Borland(R) Enterprise Server VisiBroker(R) デベロッパーズガイド
BankネーミングのサンプルではAccountManagerインタフェースを使用してAccountをオープンしたりアカウントの残高を問い合わせたりします。次に示すServerクラスは,名前をオブジェクトリファレンスにバインドするためのネーミングサービスの使い方を説明します。サーバは,ネーミングサーバのルートコンテキストにIORをバインド登録し,これは次にクライアントが検索します。
このサンプルでは,次の方法を理解できるようになります。
#include "CosNaming_c.hh" #include "BankImpl.h" // USE_STD_NS is a define setup by VisiBroker to use the std namespace USE_STD_NS int main(int argc, char* const* argv) { try { // Initialize the ORB. CORBA::ORB_var orb = CORBA::ORB_init(argc, argv); // get a reference to the root POA PortableServer::POA_var rootPOA = PortableServer::POA::_narrow( orb->resolve_initial_references("RootPOA")); // get a reference to the Naming Service root_context CosNaming::NamingContext_var rootContext = CosNaming::NamingContext::_narrow( orb->resolve_initial_references("NameService")); CORBA::PolicyList policies; policies.length(1); policies[(CORBA::ULong)0] = rootPOA->create_lifespan_policy(PortableServer::PERSISTENT); // get the POA Manager PortableServer::POAManager_var poa_manager = rootPOA->the_POAManager(); // Create myPOA with the right policies PortableServer::POA_var myPOA = rootPOA->create_POA("bank_agent_poa", poa_manager, policies); // Create the servant AccountManagerImpl managerServant; // Decide on the ID for the servant PortableServer::ObjectId_var managerId = PortableServer::string_to_ObjectId("BankManager"); // Activate the servant with the ID on myPOA myPOA->activate_object_with_id(managerId, &managerServant); // Activate the POA Manager poa_manager->activate(); CORBA::Object_var reference = myPOA->servant_to_reference(&managerServant); // Associate the bank manager with the name at the root context CosNaming::Name name; name.length(1); name[0].id = (const char *) "BankManager"; name[0].kind = (const char *) ""; rootContext->rebind(name, reference); cout << reference << " is ready" << endl; // Wait for incoming requests orb->run(); } catch(const CORBA::Exception& e) { cerr << e << endl; return 1; } return 0; }
import org.omg.PortableServer.*; import org.omg.CosNaming.*; public class Server { public static void main(String[ ] args){ try { // Initialize the ORB. org.omg.CORBA.ORB orb = org.omg.CORBA.ORB.init(args,null); // get a reference to the rootPOA POA rootPOA = POAHelper.narrow( orb.resolve_initial_references("RootPOA")); // get a reference to the Naming Service root // context org.omg.CORBA.Object rootObj = orb.resolve_initial_references("NameService"); NamingContextExt root = NamingContextExtHelper.narrow(rootObj); // Create policies for our persistent POA org.omg.CORBA.Policy[ ] policies = { rootPOA.create_lifespan_policy( LifespanPolicyValue.PERSISTENT) }; // Create myPOA with the right policies POA myPOA = rootPOA.create_POA( "bank_agent_poa", rootPOA.the_POAManager(), policies ); // Create the servant AccountManagerImpl managerServant = new AccountManagerImpl(); // Decide on the ID for the servant byte[ ] managerId = "BankManager".getBytes(); // Activate the servant with the ID on myPOA myPOA.activate_object_with_id(managerId, managerServant); // Activate the POA manager rootPOA.the_POAManager().activate(); // Associate the bank manager with the name at // the root context Note that casting is needed // as a workaround for a JDK 1.1.x bug. ((NamingContext)root).bind( root.to_name("BankManager"), myPOA.servant_to_reference(managerServant)); System.out.println( myPOA.servant_to_reference(managerServant) + " is ready."); // Wait for incoming requests orb.run(); }catch (Exception e){ e.printStackTrace(); } } }
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