私は私の大学の分散システムの科目の練習をしています。サーバーが 1 つの言語で記述され、クライアントが別の言語で記述されている CORBA を使用して、現在の時間を表示するアプリケーションを作成する必要があります。
サーバーには Python を、クライアントには Java を使用することにしました。また、Python 用に IDL ファイルをコンパイルするために omniORB を使用しています。
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()
実際、問題なくサーバー側をコンパイルして実行できます。（と思います）
一方、これは私のJavaコードです
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);
}
}
}
Java でファイルをコンパイルしますが、実行しようとするとエラーが発生します。これは私のスタックトレースです
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
どうすれば解決できますか？私を助けてください