omniORB C++ 服务器，运行应用程序的 Java 客户端问题
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【中文标题】omniORB C++ 服务器，运行应用程序的 Java 客户端问题【英文标题】：omniORB C++ server, Java client problems with running application 【发布时间】：2012-05-01 12:23:37 【问题描述】：我在运行我的应用程序时遇到问题。我有一个服务器：
#include "Hello_impl.h"
#include <iostream>
#include <omniORB4/CORBA.h>
#include <omniORB4/Naming.hh>
using namespace std;
int main(int argc, char ** argv)
try
// init ORB
CORBA::ORB_ptr orb = CORBA::ORB_init(argc, argv);
// init POA
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
Hello_impl * service = new Hello_impl;
// register within the naming service
try
CORBA::Object_var ns_obj = orb->resolve_initial_references("NameService");
if (!CORBA::is_nil(ns_obj))
CosNaming::NamingContext_ptr nc = CosNaming::NamingContext::_narrow(ns_obj);
CosNaming::Name name;
name.length(1);
name[0].id = CORBA::string_dup("TestServer");
name[0].kind = CORBA::string_dup("");
nc->rebind(name, service->_this());
cout << "Server is running ..." << endl;
catch (CosNaming::NamingContext::NotFound &)
cerr << "not found" << endl;
catch (CosNaming::NamingContext::InvalidName &)
cerr << "invalid name" << endl;
catch (CosNaming::NamingContext::CannotProceed &)
cerr << "cannot proceed" << endl;
// run
manager->activate();
orb->run();
// clean up
delete service;
// quit
orb->destroy();
catch (CORBA::UNKNOWN)
cerr << "unknown exception" << endl;
catch (CORBA::SystemException &)
cerr << "system exception" << endl;
和一个客户：
import java.util.*;
public class client
public static void main(String [] args)
org.omg.CORBA.ORB orb = org.omg.CORBA.ORB.init(args, null);
if (orb == null) System.exit(-1);
try
// obtain service from naming server
org.omg.CORBA.Object ns_obj = orb.resolve_initial_references("NameService");
org.omg.CosNaming.NamingContext nc
= org.omg.CosNaming.NamingContextHelper.narrow(ns_obj);
org.omg.CosNaming.NameComponent [] path
= new org.omg.CosNaming.NameComponent("TestServer", "") ;
org.omg.CORBA.Object obj = nc.resolve(path);
Hello hello = HelloHelper.narrow(obj);
// use service
String server = hello.say_hello("Hello, omniORB C++ server, it's Java client");
System.out.println("Answer from server: " + server);
// destroy
orb.destroy();
catch (org.omg.CORBA.ORBPackage.InvalidName exception)
exception.printStackTrace(System.out);
catch (org.omg.CosNaming.NamingContextPackage.NotFound exception)
exception.printStackTrace(System.out);
catch (org.omg.CosNaming.NamingContextPackage.CannotProceed exception)
exception.printStackTrace(System.out);
catch (org.omg.CosNaming.NamingContextPackage.InvalidName exception)
exception.printStackTrace(System.out);
catch (org.omg.CORBA.COMM_FAILURE exception)
exception.printStackTrace(System.out);
catch (Exception exception)
exception.printStackTrace(System.out);
我这样开始omniNames：
omniNames -start 6666 -logdir /home/mazix/Desktop/example/logs -errlog /home/mazix/Desktop/example/logs/omniNamesError.txt
然后，我启动我的服务器，如下所示：
./server -ORBInitRef NameService=IOR: .... (and here is my IOR num)
然后我启动客户端（在同一台计算机上）：像这样：
java client -ORBInitRef NameService=corbaloc::localhost:6666/NameService
它的工作，但我想（需要）像这样启动我的服务器：
./server NameService=corbaname::localhost:6666
和客户：
java client -ORBInitialHost localhost -ORBInitialPort 6666
但是当我这样启动它时它不起作用：/
有什么帮助吗？ :(
这是我的omniORB配置文件：http://www.2shared.com/document/dBAhFGLh/omniORB4cfg.html
除此之外，当服务器在我的计算机上，而客户端在我学校的计算机上时，我遇到了麻烦。他们“看不到”对方:(
好的，我知道：我没有启动omniNames，但在我启动omniNames 之前，端口2809 上有东西在监听，我检查了它，它是：http://i47.tinypic.com/2d2ha9u.png
我认为没关系，我不需要通过在终端输入“omniNames”来运行omniNames，但没有这样做
我只是尝试像你说的那样运行我的服务器：http://i46.tinypic.com/2q2e33c.png
我试过了：
-
运行我的 omniNames：omniNames -start 6666
运行我的服务器：./server -ORBInitRef NameService=corbaloc::localhost:6666/NameService -ORBtraceLevel 40
得到了这个：
mazix@computer:~/Desktop/example/cpp$ ./server -ORBInitRef NameService=corbaloc::localhost:6666/NameServie -ORBtraceLevel 40
omniORB: Read from configuration file "/etc/omniORB.cfg".
omniORB: Version: 4.1.2
omniORB: Distribution date: Thu Feb 14 14:19:08 GMT 2008 dgrisby
omniORB: My addresses are:
omniORB: 127.0.0.1
omniORB: 10.0.2.15
omniORB: ::1
omniORB: Maximum supported GIOP version is 1.2
omniORB: Native char code sets: ISO-8859-1 UTF-8.
omniORB: Transmission char code sets: ISO-8859-1(1.2) ISO-8859-1(1.1) ISO-8859-1(1.0) UTF-8(1.2) UTF-8(1.1).
omniORB: Native wide char code sets: UTF-16.
omniORB: Transmission wide char code sets: UTF-16(1.2).
omniORB: Information: the omniDynamic library is not linked.
omniORB: Creating ref to remote: key<INIT>
target id : omg.org/CORBA/InitialReferences:1.0
most derived id: omg.org/CORBA/InitialReferences:1.0
omniORB: Current configuration is as follows:
omniORB: DefaultInitRef (file) = corbaloc::localhost:6666/NameService
omniORB: DefaultInitRef (args) =
omniORB: InitRef = NameService=corbaloc::localhost:6666/NameServie
omniORB: abortOnInternalError = 0
omniORB: abortOnNativeException = 0
omniORB: acceptBiDirectionalGIOP = 0
omniORB: acceptMisalignedTcIndirections = 0
omniORB: bootstrapAgentHostname = localhost
omniORB: bootstrapAgentPort = 900
omniORB: clientCallTimeOutPeriod = 0
omniORB: clientConnectTimeOutPeriod = 0
omniORB: clientTransportRule = * unix,ssl,tcp
omniORB: configFile = /etc/omniORB.cfg
omniORB: connectionWatchImmediate = 0
omniORB: connectionWatchPeriod = 50000
omniORB: copyValuesInLocalCalls = 1
omniORB: diiThrowsSysExceptions = 0
omniORB: dumpConfiguration = 0
omniORB: endPoint = giop:tcp::
omniORB: endPointPublish = addr
omniORB: giopMaxMsgSize = 2097152
omniORB: giopTargetAddressMode = KeyAddr
omniORB: id = omniORB4
omniORB: idleThreadTimeout = 10
omniORB: immediateAddressSwitch = 0
omniORB: inConScanPeriod = 180
omniORB: lcdMode = 0
omniORB: maxGIOPConnectionPerServer = 5
omniORB: maxGIOPVersion = 1.2
omniORB: maxInterleavedCallsPerConnection = 5
omniORB: maxServerThreadPerConnection = 100
omniORB: maxServerThreadPoolSize = 100
omniORB: maxSocketRecv = 2147483647
omniORB: maxSocketSend = 2147483647
omniORB: nativeCharCodeSet = ISO-8859-1
omniORB: nativeWCharCodeSet = UTF-16
omniORB: objectTableSize = 0
omniORB: offerBiDirectionalGIOP = 0
omniORB: oneCallPerConnection = 1
omniORB: outConScanPeriod = 120
omniORB: poaHoldRequestTimeout = 0
omniORB: poaUniquePersistentSystemIds = 1
omniORB: principal = [Null]
omniORB: resetTimeOutOnRetries = 0
omniORB: scanGranularity = 5
omniORB: serverCallTimeOutPeriod = 0
omniORB: serverTransportRule = * unix,ssl,tcp
omniORB: socketSendBuffer = -1
omniORB: strictIIOP = 1
omniORB: supportBootstrapAgent = 1
omniORB: supportCurrent = 1
omniORB: supportPerThreadTimeOut = 0
omniORB: tcAliasExpand = 0
omniORB: threadPerConnectionLowerLimit = 9000
omniORB: threadPerConnectionPolicy = 1
omniORB: threadPerConnectionUpperLimit = 10000
omniORB: threadPoolWatchConnection = 1
omniORB: traceExceptions = 1
omniORB: traceFile = [stderr]
omniORB: traceInvocationReturns = 0
omniORB: traceInvocations = 0
omniORB: traceLevel = 40
omniORB: traceThreadId = 0
omniORB: traceTime = 0
omniORB: unixTransportDirectory = /tmp/omni-%u
omniORB: unixTransportPermission = 777
omniORB: useTypeCodeIndirections = 1
omniORB: verifyObjectExistsAndType = 1
omniORB: Initialising incoming endpoints.
omniORB: Instantiate endpoint 'giop:tcp::0'
omniORB: Bind to address 0.0.0.0
omniORB: Publish specification: 'addr'
omniORB: Try to publish 'addr' for endpoint giop:tcp:10.0.2.15:44025
omniORB: Publish endpoint 'giop:tcp:10.0.2.15:44025'
omniORB: Starting serving incoming endpoints.
omniORB: Creating ref to remote: key<NameServie>
target id : IDL:omg.org/CORBA/Object:1.0
most derived id:
omniORB: Initial reference `NameService' resolved from -ORBInitRef argument / ORB registration.
omniORB: Client attempt to connect to giop:tcp:localhost:6666
omniORB: Switch rope to use address giop:tcp:localhost:6666
omniORB: Unable to open new connection: giop:tcp:localhost:6666
omniORB: throw giopStream::CommFailure from giopStream.cc:1148(0,NO,TRANSIENT_ConnectFailed)
omniORB: throw TRANSIENT from omniObjRef.cc:789 (NO,TRANSIENT_ConnectFailed)
system exceptionTRANSIENT_ConnectFailed
omniORB: omniRemoteIdentity deleted.
omniORB: ObjRef() -- deleted.
omniORB: ORB not destroyed; no final clean-up.
【问题讨论】：
您能否更具体地指出“它不起作用”？它在做什么？你能得到一个线程转储或调试客户端吗？顺便说一句：如果您没有在 main() 中捕获异常，它们将被打印到控制台；） 当我启动我的服务器时：./server NameService=corbaname::localhost:6666 它说：“系统异常”就是这样.. 所以服务器不会启动。我以为是客户端失败了。 如果有帮助，我可以上传我的整个项目... :( 【参考方案1】：java client -ORBInitialHost localhost -ORBInitialPort 6666
是一种ORACLE/SUN 查找本地命名服务的特殊技术。更灵活和可移植的方法是对客户端和服务器都使用 corbaloc 地址。这是你的情况：
java client -ORBInitRef NameService=corbaloc::localhost:6666/NameService
#and
./server -ORBInitRef NameService=corbaloc::localhost:6666/NameService
对于客户端和服务器，您还可以解析 cmdline 参数以获得“更好”的界面，例如
java client localhost:6666
# and
./server localhost:6666
在这种情况下，您必须使用正常的对象缩小来交换对 resolve_initial_references("NameService") 的调用，或者在运行时修补 ORB 配置/参数。 （可根据要求提供示例）
如果客户端/服务器不在同一台机器上运行，您必须将 localhost 与服务器的 ip 或公共名称交换为您的 NamingService 和您的服务器。
【讨论】：
谢谢你 4 的回答，但是......我试着像你说的那样运行我的服务器：./server -ORBInitRef NameService=corbaloc::localhost:6666/NameService 我得到了这个错误：“系统异常”，你可以在截图上看到它：i49.tinypic.com/2444raa.png，我真的不知道该怎么办......，这是我的整个项目：2shared.com/file/neMOyZ91/corba-example.html 我构建了你的代码，但是我在 2809 端口运行了我的 NamingService，它可以工作：cpp$ ./server -ORBInitRef NameService=corbaloc::localhost:2809/NameService 服务器正在运行... 我想你的 NamingService 没有运行。 (netstat -ptupln) 将-ORBtraceLevel 40 添加到服务器的命令行并发布输出
是的，我想是的。再次感谢你。但是你会不会再这么好，告诉我我做错了什么，我无法在学校的电脑上连接我的客户端和我在家里的服务器？我有一个带有套接字的 Java 应用程序，还有客户端/服务器应用程序，一切都很好……所以这不是防火墙问题。我在家用计算机上运行服务器：./server -ORBInitRef NameService=corbaloc::localhost:2809/NameService 然后在我的学校计算机上运行客户端（使用 PuTTy）：java client -ORBInitRef NameService=corbaloc::ip-of-my -home-computer:2809/NameService 但我的客户没有看到我的服务器。【参考方案2】：
什么是 localHist？你是说本地主机吗？
据我所知，CORBA 客户端始终需要提供 IOR 或 corbaloc 字符串。也许您可以在本地配置它，但这可能是特定于客户端的。您的服务器绑定应该是可配置的。
您的家庭计算机和学校计算机之间的问题可能与防火墙有关。如果您学校的 IT 部门没有为未知的入站流量设置防火墙，我会感到非常惊讶。连接到他们网络上的随机机器就属于这一类。
【讨论】：
广告1。是的。我的意思是本地主机，对不起 Ad2。好的，但是客户端是 Java 的，在我的课堂上，老师向我们展示了一个带有 CORBA 的 Java 程序，并像这样启动它：java client -ORBInitialHost localhost -ORBInitialPort 6666（当我在 Java 中同时拥有客户端和服务器时，没关系，但我有C++ 中的服务器）我也尝试运行我的服务器：./server NameService=corbaname::localhost:6666 但正如我所说，它只说“系统异常”...... Ad3。这很奇怪，因为当我尝试将同一学校服务器上的其他程序（带套接字）与我家中的客户端连接时，一切正常。以上是关于omniORB C++ 服务器，运行应用程序的 Java 客户端问题的主要内容，如果未能解决你的问题，请参考以下文章