Question

当我测试用Java编写的应用程序时，我对一个奇怪的错误感到头疼。问题出在这里：我编写了我的应用程序使用CORBA连接技术。它是一个CORBA客户端应用程序模块。在Windows环境中，事件被成功推送，但在linux（redhat和ubuntu）中却没有。但是，它非常怪异，我可以调用任何CORBA函数并准确地获取返回的数据。我调试了我的代码，发现CORBA连接和通知服务的初始化成功了。在Linux OS中，防火墙已禁用，并且端口12002未被任何应用程序使用。这里没有任何例外。所以，你能解释一下原因是什么吗？我对CORBA的经验不足。像我这样的新手这么复杂。请帮帮我！

P / S： +初始化代码如下：

        Properties props = new Properties();
    /*props.setProperty("borland.enterprise.licenseDefaultDir", "C:/Borland/VisiBroker/license");*/
    props.setProperty("org.omg.CORBA.ORBClass", "com.inprise.vbroker.orb.ORB");
    props.setProperty("org.omg.CORBA.ORBSingletonClass", "com.inprise.vbroker.orb.ORBSingleton");
    props.setProperty("javax.rmi.CORBA.StubClass", "com.inprise.vbroker.rmi.CORBA.StubImpl");
    props.setProperty("javax.rmi.CORBA.UtilClass", "com.inprise.vbroker.rmi.CORBA.UtilImpl");
    props.setProperty("javax.rmi.CORBA.PortableRemoteObjectClass", "com.inprise.vbroker.rmi.CORBA.PortableRemoteObjectImpl");
    props.setProperty("vbroker.agent.enableLocator", "false");
    props.setProperty("vbroker.orb.initRef", "NotificationService=corbaloc::x.x.x.x:12002/NotificationService");


    try {
        System.out.println("orb = org.omg.CORBA.ORB.init(new String[0], props);");
        orb = org.omg.CORBA.ORB.init(new String[0], props);
    } catch (Exception e) {
        System.out.println("Fail initial orb for Noti-Service.."+e);
        System.exit(1);
    }

    try {
        org.omg.CORBA.Object poa = orb.resolve_initial_references("RootPOA");
        rootPoa = POAHelper.narrow(poa);
    } catch (org.omg.CORBA.ORBPackage.InvalidName e) {
        System.out.println("Can't get RootPOA"+ e);
        System.exit(1);
    }

        try {
        rootPoa.the_POAManager().activate();
        System.out.println("rootPoa.the_POAManager().activate();");
    } catch (org.omg.PortableServer.POAManagerPackage.AdapterInactive ex) {
        System.out.println("Can't activate POAManager"+ex);
        System.exit(1);
    }

    Runtime.getRuntime().addShutdownHook(new Thread(new ShutdownHook(orb)));

    Thread thread = new Thread() {
        public void run() {
            orb.run();
        }
    };

    thread.setName("OpenFusion ORB thread");
    thread.start();

方法getObject（）：

private StructuredPushConsumer getObject（）{ StructuredPushConsumer serverObj = null;

    org.omg.PortableServer.Servant servant = new StructuredPushConsumerPOATie(this, rootPoa);

    try {
        org.omg.CORBA.Object ref = rootPoa.servant_to_reference(servant);
        serverObj = StructuredPushConsumerHelper.narrow(ref);
    } catch (ServantNotActive e) {
        System.out.println("Unexpected Exception: "+e);
        System.exit(1);
    } catch (WrongPolicy e) {
        System.out.println("Unexpected Exception: "+e);
        System.exit(1);
    }
    return serverObj;

}

connect（）方法：

 public void connect() {
/* Defines the type of proxy required */
ClientType ctype = ClientType.STRUCTURED_EVENT;
/* Holder to hold the proxy id */
org.omg.CORBA.IntHolder pid = new org.omg.CORBA.IntHolder();
/* Proxy supplier variable */
ProxySupplier proxySupplier = null;
/* Obtain the consumer admin object reference */
ConsumerAdmin admin = channel.default_consumer_admin();

try {
    /* obtain a structured push supplier object reference. */

    proxySupplier = ((ConsumerAdminOperations) admin).obtain_notification_push_supplier(ctype, pid);
    System.out.println("proxySupplier = ((ConsumerAdminOperations) admin).obtain_notification_push_supplier(ctype, pid);");
} catch (AdminLimitExceeded ex) {
    /*
     * Thrown if the admin object is unable to have any more proxy suppliers associated with it.
     */
    System.err.println("Maximum number of proxies exceeded!");
    System.exit(1);
}

/* Narrow the proxy supplier to a Structured Proxy Push Supplier */
proxy = StructuredProxyPushSupplierHelper.narrow(proxySupplier);

try {
    /* connect the consumer to the proxy */
    proxy.connect_structured_push_consumer(getObject());
    System.out.println("proxy.connect_structured_push_consumer(getObject());");
} catch (AlreadyConnected e) {
    /*
     * This exception is thrown if a consumer is already connected to this proxy. This should not be thrown because the proxy has just been created.
     */
    System.err.println("Already connected!");
    System.exit(1);
} catch (TypeError e) {
    /*
     * This exception is thrown if you attempt to connect a sequenced consumer to a structured proxy or vice versa.
     */
    System.err.println("Type error!");
    System.exit(1);
}

}

disconnect（）方法：

public void disconnect() {    
    if (proxy != null) {
        System.out.println("Disconnected!");
    }
}

Answer 1

我认为你的对象激活缺失了。可能是在这个poitn中没有完全定义ORB行为，所以你在这里使用更明确的激活。

// create TIE 
StructuredPushConsumerPOATie pushConsumer = 
    new StructuredPushConsumerPOATie(this, rootPoa);

// activate object (may work without that)
rootPoa.activate_object(pushConsumer);
try {
    // implicit activation
    org.omg.CORBA.Object ref = pushConsumer._this_object(); 
    serverObj = StructuredPushConsumerHelper.narrow(ref);
}

Answer 2

也许这不是SW相关问题，而是硬件/网络。

如果您使用多主机（多个网卡/接口），则应指定接收CORBA通知的IP地址。

查看您的属性文件。我使用了JacOrb，所以文件是 etc \ jacorb.properties ，属性如下的 OAAddress = IIOP：//1.2.3.4：4711

在java中成功初始化Corba通知服务但无法在linux中获取任何事件，但它在Windows中完成

2 个答案: