【转】Cobra-omniORB简单编程-命名服务

 命名服务基本与上面的<<Cobra-omniORB简单编程-IOR>>相似，下面具体对需要的操作步骤进行描述。

一、设置环境变量

1）、在“D:/omniORB-4.1.1/”目录下新建目录Omninames；

2）、设置用户环境变量“OMNINAMES_LOGDIR = D:/omniORB-4.1.1/Omninames”。

二、配置命名服务

执行D:/omniORB-4.1.1/sample.reg注册文件，

在HKEY_LOCAL_MACHINE/SOFTWARE/omniORB/InitRef 加入类型为字符串键“１”，键值为"NameService=corbaname::my.host.name"（这里的my.host.name 是你的机器名）

如果使用本机来测试，键值可以为NameService=corbaname::127.0.0.1。

三、使用上述testOrbServer工程文件，修改testOrbServer.cpp代码:

// testOrbServer.cpp : Defines the entry point for the console application.
//
#include <iostream>
#include "time.h"
using namespace std;

class Time_impl:public virtual POA_Time
{
public :
    virtual short get_gmt();
};

short Time_impl::get_gmt()
{
    return 1234;
}

int main(int argc, char* argv[])
{
    CORBA::ORB_var orb;
    Time_impl* impl = NULL;
    try
    {

        // Initialize the ORB
        orb = CORBA::ORB_init(argc,argv);

        // Get a reference to the root POA
        CORBA::Object_var rootPOAObj = orb->resolve_initial_references("RootPOA");

        // Narrow it to the correct type
        PortableServer::POA_var rootPOA = PortableServer::POA::_narrow(rootPOAObj.in());

        // Create POA policies
        CORBA::PolicyList policies;
        policies.length(1);
        policies[0] = rootPOA->create_thread_policy(PortableServer::SINGLE_THREAD_MODEL);

        // Get the POA manager object
        PortableServer::POAManager_var manager = rootPOA->the_POAManager();

        // Create a new POA with specified policies
        PortableServer::POA_var myPOA = rootPOA->create_POA("myPOA", manager, policies);

        // Free policies
        CORBA::ULong len = policies.length();
        for (CORBA::ULong i = 0;i < len; i++)
            policies[i]->destroy();

        //Get a reference to the Naming Service root_context
        CORBA::Object_var rootContextObj = orb->resolve_initial_references("NameService");
        // Narrow to the correct type
        CosNaming::NamingContext_var nc = CosNaming::NamingContext::_narrow(rootContextObj.in());
        //CosNaming::NamingContext_var nc = CosNaming::NamingContext::_narrow(rootContextObj);

        // Create a reference to the servant
        impl = new Time_impl();
        // Activate object
        PortableServer::ObjectId_var myObjID = myPOA->activate_object(impl);

        // Get a CORBA reference with the POA through the servant
        CORBA::Object_var o = myPOA->servant_to_reference(impl);
        // The reference is converted to a character string
        _CORBA_String_var s = orb->object_to_string(o);
        cout << "The IOR of the object is: " << s.in() << endl;

        CosNaming::Name name;
        name.length(1);
        name[0].id = (const char *)"FirstTimeService";
        name[0].kind = (const char *)"";
        // Bind the Object into the name service
        nc->rebind(name, o);

        //Activate the POA
        manager->activate();
        cout << "The server is ready. Awaiting for incoming requests..." << endl;

        // Strat the ORB
        orb->run();
    }
    catch (const CORBA::Exception& e)
    {
        cerr << " exception " << e._name() << endl;
        return 1;
    }
    // Decrement reference count
    if (impl)
    {
        impl->_remove_ref();
    }

    // End CORBA
    if (!CORBA::is_nil(orb))
    {
        try
        {
            orb->destroy();
            cout << "Ending CORBA..." << endl;
        }
        catch (const CORBA::Exception& e)
        {
            cout << "orb->destroy() failed:" << e._name() << endl;
            return 1;
        }
    }
    return 0;
}

四、使用上述testOrbClinet工程文件，修改testOrbClinet.cpp代码:

// testOrbClient.cpp : Defines the entry point for the console application.
//
#include <iostream>

#include "time.h"
using namespace std;

int main(int argc,char* argv[])
{
    // Declare ORB
    CORBA::ORB_var orb;
    try
    {
        if (argc != 2)
        {
            throw 0;
        }

        // Initialize the ORB
        orb = CORBA::ORB_init(argc, argv);

        //Get a reference to the Naming Service
        CORBA::Object_var rootContextObj = orb->resolve_initial_references("NameService");
        if (CORBA::is_nil(rootContextObj))
        {
            cerr << "Nil Time Reference" << endl;
            throw 0;
        }
        CosNaming::NamingContext_var nc =
            CosNaming::NamingContext::_narrow(rootContextObj.in());


        CosNaming::Name name;
        name.length(1);
        name[0].id = (const char *)"FirstTimeService";
        name[0].kind = (const char *)"";
        //Invoke the root context to retrieve the object reference
        CORBA::Object_var managerObj = nc->resolve(name);
        //Narrow the previous object to obtain the correct type
        ::Time_var manager = ::Time::_narrow(managerObj.in());

        if (CORBA::is_nil(manager))
        {
            cerr << "Nil Time Reference" << endl;
            throw 0;
        }
        cout << "OK, Let's have a look: " << manager->get_gmt() << endl;
    }
    catch (const CORBA::Exception& e)
    {
        cerr << "Client.main() Exception  " << e._name() << endl;
        return 1;
    }
    return 0;
}

五、编译上述两个工程

六、启动命名服务

打开一个命令窗口，输入omniNames –start (请不要关闭该窗口，如果不幸把这个窗口关闭了，那就重新输入omniNames就行了，不用带参数了。也就是说只有第一次用omniNames时才用-start，第二次以后就不用了，因为log文件已经存在了。)。

  

六、运行testOrbServer.exe服务端程序

七、运行testOrbClient.exe客户端程序

 

转自：https://blog.csdn.net/liuxuezong/article/details/7232132