大家好，我是 CORBA
C++的新手，我阅读了有关如何在 Linux 上安装 CORBA 的教程，它的工作和代码编译良好，我想执行多个服务器实例，因为我想创建一个点对点。 例如，当我创建一个服务器实例和多个客户端实例时，工作正常，但是当我尝试执行两个或多个服务器实例以便仅从客户端接收消息时，最后一个服务器实例收到消息，请问有人可以帮我吗？
这是我的服务器和客户端代码
服务器.cpp
#include "MyExampleInterface_impl.h"
#include <iostream>
#include <CORBA.h>
#include <Naming.hh>
/** Server name, clients needs to know this name */
#define SERVER_NAME "MyServerName"
using namespace std;
int main(int argc, char ** argv)
{
cerr << "CORBA SERVER RUNNING..." << endl;
try {
//------------------------------------------------------------------------
// Initialize CORBA ORB
//------------------------------------------------------------------------
CORBA::ORB_ptr orb = CORBA::ORB_init(argc, argv);
//------------------------------------------------------------------------
// Initialize POA: Get reference to root POA
//
// Servant must register with POA in order to be made available for client
// Get reference to the RootPOA.
//-----------------------------------------------------------------------
CORBA::Object_var poa_obj = orb->resolve_initial_references("RootPOA");
PortableServer::POA_var poa = PortableServer::POA::_narrow(poa_obj);
PortableServer::POAManager_var manager = poa->the_POAManager();
//------------------------------------------------------------------------
// Create service
//------------------------------------------------------------------------
MyExampleInterface_impl * service = new MyExampleInterface_impl;
cerr << "ya se creo el servicio procediendo a crear instancia" << endl;
try {
//------------------------------------------------------------------------
// Bind object to name service as defined by directive InitRef
// and identifier "NameService" in config file omniORB.cfg.
//------------------------------------------------------------------------
CORBA::Object_var ns_obj = orb->resolve_initial_references("NameService");
if (!CORBA::is_nil(ns_obj)) {
//------------------------------------------------------------------------
// Narrow this to the naming context
//------------------------------------------------------------------------
CosNaming::NamingContext_ptr nc = CosNaming::NamingContext::_narrow(ns_obj);
//------------------------------------------------------------------------
// Bind to CORBA name service. Same name to be requested by client.
//------------------------------------------------------------------------
CosNaming::Name name;
name.length(1);
name[0].id = CORBA::string_dup(SERVER_NAME);
name[0].kind = CORBA::string_dup("");
nc->rebind(name, service->_this());
//------------------------------------------------------------------------
// Intizialization ready, server runs
//------------------------------------------------------------------------
cout << argv[0] << " C++ (omniORB) server '" << SERVER_NAME << "' is running .." << endl;
}
} catch (CosNaming::NamingContext::NotFound &) {
cerr << "Caught CORBA exception: not found" << endl;
} catch (CosNaming::NamingContext::InvalidName &) {
cerr << "Caught CORBA exception: invalid name" << endl;
} catch (CosNaming::NamingContext::CannotProceed &) {
cerr << "Caught CORBA exception: cannot proceed" << endl;
}
//------------------------------------------------------------------------
// Activate the POA manager
//------------------------------------------------------------------------
manager->activate();
//------------------------------------------------------------------------
// Accept requests from clients
//------------------------------------------------------------------------
cerr << "aceptando peticiones de cliente con run()" << endl;
orb->run();
cerr << "hecho ahora esperando..." << endl;
//------------------------------------------------------------------------
// Clean up
//------------------------------------------------------------------------
//delete service;
//------------------------------------------------------------------------
// Destroy ORB
//------------------------------------------------------------------------
orb->destroy();
} catch (CORBA::UNKNOWN) {
cerr << "Caught CORBA exception: unknown exception" << endl;
} catch (CORBA::SystemException &) {
cerr << "Caught CORBA exception: system exception" << endl;
}
}
客户端.cpp
#include "example.hh"
#include <iostream>
#include <CORBA.h>
#include <Naming.hh>
/** Name is defined in the server.cpp */
#define SERVER_NAME "MyServerName"
using namespace std;
int main(int argc, char ** argv)
{
try {
//------------------------------------------------------------------------
// Initialize ORB object.
//------------------------------------------------------------------------
CORBA::ORB_ptr orb = CORBA::ORB_init(argc, argv);
//------------------------------------------------------------------------
// Resolve service
//------------------------------------------------------------------------
ExampleInterface_ptr service_server = 0;
try {
//------------------------------------------------------------------------
// Bind ORB object to name service object.
// (Reference to Name service root context.)
//------------------------------------------------------------------------
CORBA::Object_var ns_obj = orb->resolve_initial_references("NameService");
if (!CORBA::is_nil(ns_obj)) {
//------------------------------------------------------------------------
// Bind ORB object to name service object.
// (Reference to Name service root context.)
//------------------------------------------------------------------------
CosNaming::NamingContext_ptr nc = CosNaming::NamingContext::_narrow(ns_obj);
//------------------------------------------------------------------------
// The "name text" put forth by CORBA server in name service.
// This same name ("MyServerName") is used by the CORBA server when
// binding to the name server (CosNaming::Name).
//------------------------------------------------------------------------
CosNaming::Name name;
name.length(1);
name[0].id = CORBA::string_dup(SERVER_NAME);
name[0].kind = CORBA::string_dup("");
//------------------------------------------------------------------------
// Resolve "name text" identifier to an object reference.
//------------------------------------------------------------------------
CORBA::Object_ptr obj = nc->resolve(name);
if (!CORBA::is_nil(obj)) {
service_server = ExampleInterface::_narrow(obj);
}
}
} catch (CosNaming::NamingContext::NotFound &) {
cerr << "Caught corba not found" << endl;
} catch (CosNaming::NamingContext::InvalidName &) {
cerr << "Caught corba invalid name" << endl;
} catch (CosNaming::NamingContext::CannotProceed &) {
cerr << "Caught corba cannot proceed" << endl;
}
//------------------------------------------------------------------------
// Do stuff
//------------------------------------------------------------------------
if (!CORBA::is_nil(service_server)) {
char * server = service_server->send_message("Message from C++ (omniORB) client");
cout << "response from Server: " << server << endl;
CORBA::string_free(server);
}
//------------------------------------------------------------------------
// Destroy OBR
//------------------------------------------------------------------------
orb->destroy();
} catch (CORBA::UNKNOWN) {
cerr << "Caught CORBA exception: unknown exception" << endl;
}
}
命名服务类似于电话簿，您可以使用已知名称存储对象引用。目前，您的代码中存在"MyServerName"，并且只能注册一台服务器。启动第二台服务器将更新命名服务以仅使用第二台服务器，从那时起，所有新客户端都将使用该服务器。
您可以使用唯一的名称在命名服务中注册每个服务器，并让客户端决定使用哪个服务器。