如何在Python和Java中使用CORBA？

我正在我大学的分布式系统专业实习。我们必须使用CORBA做一个应用程序，显示当前的时间，其中服务器用一种语言编写，客户端用另一种语言编写

我决定使用Python作为服务器，Java作为客户端。我使用omniORB为Python编译IDL文件

from datetime import *
import sys, os
import CORBA, CosNaming, Util, Util__POA

class Hora_i(Util__POA.Hora):
    def get_hora(self):
        return datetime.today()

orb = CORBA.ORB_init(sys.argv)
poa = orb.resolve_initial_references("RootPOA")
poa._get_the_POAManager().activate()

servant = Hora_i()
poa.activate_object(servant)
servantObjref = servant._this()

print orb.object_to_string(servant._this())

#horaObjref = servant._this()

nameRoot = orb.resolve_initial_references("NameService")
nameRoot = nameRoot._narrow(CosNaming.NamingContext)
try:
    if nameRoot is None:
        print "NameService narrow failed"
        sys.exit(1)
except CORBA.ORB.InvalidName, ex:
    # This should never happen, since "NameService" is always a
    # valid name, even if it hadn't been configured.

    print "Got an InvalidName exception when resolving NameService!"
    sys.exit(1)

except CORBA.NO_RESOURCES, ex:
    print "No NameService configured!"
    sys.exit(1)

except CORBA.SystemException, ex:
    print "System exception trying to resolve and narrow NameService!"
    print ex
    sys.exit(1)

try:
    name = [CosNaming.NameComponent("hora", "")]
    horaContext = nameRoot.bind_new_context(name)
except CosNaming.NamingContext.AlreadyBound, ex:
        # There is already a context named "hora", so we resolve
        # that.
        print 'Reusing "hora" naming context.'

        horaContext = nameRoot.resolve(name)
        horaContext = horaContext._narrow(CosNaming.NamingContext)

        if horaContext is None:
            # Oh dear -- the thing called "hora" isn't a
            # NamingContext. We could replace it, but it's safer to
            # bail out.
            print 'The name "hora" is already bound in the NameService.'
            sys.exit(1)

horaContext.rebind([CosNaming.NameComponent("DarHora","")], servantObjref)
print "DarHora bound in NameService.    "

orb.run()

实际上，我可以毫无问题地编译和运行服务器端。（我认为）

另一方面，这是我的java代码

import Util.*;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;

     public class Cliente {
        public static void main(String args[]) {
            try{
                ORB orb = ORB.init(args,null);
  // obtener una referencia a NameService
  org.omg.CORBA.Object objRef = orb.resolve_initial_references("DarHora");
  // las siguientes lineas nos permiten obtener una ref a un objeto remoto
  NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
  // nombre del obj remoto
  String nombre = "DarHora";
    Hora impl = HoraHelper.narrow(ncRef.resolve_str(nombre));      
  System.out.println(impl.get_hora());
  }
  catch (Exception e) {
   System.out.println("ERROR : " + e);
   e.printStackTrace(System.out);
  }
 }
}

在java中，我编译我的文件，但当我试图运行它时，出现了一个错误。这是我的追踪

com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl <init>
WARNING: "IOP00410201: (COMM_FAILURE) Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: 127.0.1.1; port: 900"
org.omg.CORBA.COMM_FAILURE:   vmcid: SUN  minor code: 201  completed: No
    at com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(ORBUtilSystemException.java:2200)
    at com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(ORBUtilSystemException.java:2221)
    at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:223)
    at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:236)
    at com.sun.corba.se.impl.transport.SocketOrChannelContactInfoImpl.createConnection(SocketOrChannelContactInfoImpl.java:119)
    at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(CorbaClientRequestDispatcherImpl.java:185)
    at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.request(CorbaClientDelegateImpl.java:136)
    at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.invoke(BootstrapResolverImpl.java:99)
    at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.resolve(BootstrapResolverImpl.java:132)
    at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(CompositeResolverImpl.java:47)
    at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(CompositeResolverImpl.java:47)
    at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(CompositeResolverImpl.java:47)
    at com.sun.corba.se.impl.orb.ORBImpl.resolve_initial_references(ORBImpl.java:1169)
    at Cliente.main(Cliente.java:10)
Caused by: java.net.ConnectException: Connection refused
    at sun.nio.ch.Net.connect0(Native Method)
    at sun.nio.ch.Net.connect(Net.java:465)
    at sun.nio.ch.Net.connect(Net.java:457)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:639)
    at java.nio.channels.SocketChannel.open(SocketChannel.java:184)
    at com.sun.corba.se.impl.transport.DefaultSocketFactoryImpl.createSocket(DefaultSocketFactoryImpl.java:78)
    at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:206)
    ... 11 more

com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl
警告：“IOP0041201:（通信故障）连接故障：socketType:IIOP_CLEAR_TEXT；主机名：127.0.1.1；端口：900”
org.omg.CORBA.COMM_故障：vmcid:SUN次要代码：201已完成：否
在com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure（ORBUtilSystemException.java:2200）上
在com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure（ORBUtilSystemException.java:2221）
位于com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.（SocketOrChannelConnectionImpl.java:223）
位于com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.（SocketOrChannelConnectionImpl.java:236）
位于com.sun.corba.se.impl.transport.socketorchannelcontactinfo.createConnection（socketorchannelcontactinfo.java:119）
位于com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest（CorbaClientRequestDispatcherImpl.java:185）
位于com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.request（CorbaClientDelegateImpl.java:136）
位于com.sun.corba.se.impl.resolver.BootstrapResolverImpl.invoke（BootstrapResolverImpl.java:99）
位于com.sun.corba.se.impl.resolver.BootstrapResolverImpl.resolve（BootstrapResolverImpl.java:132）
位于com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve（CompositeResolverImpl.java:47）
位于com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve（CompositeResolverImpl.java:47）
位于com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve（CompositeResolverImpl.java:47）
在com.sun.corba.se.impl.orb.orbempl.resolve_initial_references上（orbempl.java:1169）
在Cliente.main（Cliente.java:10）
原因：java.net.ConnectException:连接被拒绝
位于sun.nio.ch.Net.connect0（本机方法）
位于sun.nio.ch.Net.connect（Net.java:465）
位于sun.nio.ch.Net.connect（Net.java:457）
位于sun.nio.ch.SocketChannelImpl.connect（SocketChannelImpl.java:639）
位于java.nio.channels.SocketChannel.open（SocketChannel.java:184）
位于com.sun.corba.se.impl.transport.DefaultSocketFactoryImpl.createSocket（DefaultSocketFactoryImpl.java:78）
位于com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.（SocketOrChannelConnectionImpl.java:206）
... 还有11个

---

我怎样才能解决这个问题？请帮帮我，orb。解析初始参考（“DarHora”）

很奇怪。为什么您的客户端不去名称服务查找服务器？看起来您的名称服务没有运行。请查看您的ORB文档，了解如何运行它。看起来它希望它在localhost:900上运行，但它无法打开到它的连接。或者可能是Java客户端配置不正确，认为名称服务运行在与实际不同的端口上。