CORBA Exception of bind unbind rebind resolve_str

最新推荐文章于 2025-08-11 09:33:58 发布

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#exception #string #null #properties #wrapper #object

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本文介绍使用JacORB实现CORBA命名服务的bind、unbind、rebind及resolve_str操作，并展示了如何处理不同情况下的异常。

JacORB bind unbind rebind resolve_str operation

unbind will throw NotFound exception when there is not an entry

bind will throw AlreadyBound exception when there is already an entry

resolve_str will throw NotFound exception when there is not an entry

rebind will NOT throw exception even when there is not an entry

Code example:

:-# cat NSList.java
import org.omg.CORBA.ORB;
import org.omg.CosNaming.NamingContextExt;
import org.omg.CosNaming.NamingContextExtHelper;
import org.omg.CosNaming.NamingContextPackage.AlreadyBound;
import org.omg.CosNaming.NamingContextPackage.CannotProceed;
import org.omg.CosNaming.NamingContextPackage.InvalidName;
import org.omg.CosNaming.NamingContextPackage.NotFound;

import java.util.Properties;

public class NSList {

        private NamingContextExt ns = null;
        private ORB orb = null;

        private static final String ORB_PROPERTY = "org.omg.CORBA.ORBClass";
        private static final String ORB_DEFAULT = "org.jacorb.orb.ORB";
        private static final String ORB_SINGLETON_PROPERTY = "org.omg.CORBA.ORBSingletonClass";
        private static final String ORB_SINGLETON_DEFAULT = "org.jacorb.orb.ORBSingleton";

        private void initORB() {
                String orbClass = System.getProperty(ORB_PROPERTY, ORB_DEFAULT);
                String orbSingleton = System.getProperty(ORB_SINGLETON_PROPERTY,
                                ORB_SINGLETON_DEFAULT);

                Properties props = System.getProperties();
                props.put(ORB_PROPERTY, orbClass);
                props.put(ORB_SINGLETON_PROPERTY, orbSingleton);

                orb = ORB.init(new String[0], props);
        }

        private void initNS() {
                String nsStr = "corbaloc::localhost:34000/NameService";
                org.omg.CORBA.Object obj = orb.string_to_object(nsStr);
                ns = NamingContextExtHelper.narrow(obj);
        }

        private void run() {
                String huiName = "HuiSample";
                String iorStr = "IOR:000000000000004049444C3A636F6D2F6C7563656E742F6973672F6672616D65776F726B2F7363616C6162696C6974792F5265706C69636174696F6E4D616E616765723A312E3000000000010000000000000078000102000000000E3133352E3235322E3138312E3300BE5A00000024626A74657374332F70657273697374656E745F706F612F31323434353836393739313431000000020000000000000008000000004A414300000000010000001C00000000000100010000000105010001000101090000000105010001";

                org.omg.CORBA.Object obj = null;
                this.unbind(huiName);
                obj = this.resolve(huiName);
                this.bind(huiName, orb.string_to_object(iorStr));
                obj = this.resolve(huiName);
        }

        public void bind(String name, org.omg.CORBA.Object obj) {
                System.out.println("BEGIN bind");
                try {
                        ns.bind(ns.to_name(name), obj);
                } catch (NotFound e) {
                        System.out.println("FAILL bind NotFound");
                } catch (CannotProceed e) {
                        System.out.println("FAILL bind CannotProceed");
                } catch (InvalidName e) {
                        System.out.println("FAILL bind InvalidName");
                } catch (AlreadyBound e) {
                        System.out.println("FAILL bind AlreadyBound");
                }
        }

        public void unbind(String name) {
                System.out.println("BEGIN unbind");
                try {
                        ns.unbind(ns.to_name(name));
                } catch (NotFound e) {
                        System.out.println("FAILL unbind NotFound");
                } catch (CannotProceed e) {
                        System.out.println("FAILL unbind CannotProceed");
                } catch (InvalidName e) {
                        System.out.println("FAILL unbind InvalidName");
                }
        }

        public void rebind(String name, org.omg.CORBA.Object obj) {
                System.out.println("BEGIN rebind");
                try {
                        ns.rebind(ns.to_name(name), obj);
                } catch (NotFound e) {
                        System.out.println("FAILL rebind NotFound");
                } catch (CannotProceed e) {
                        System.out.println("FAILL rebind CannotProceed");
                } catch (InvalidName e) {
                        System.out.println("FAILL rebind InvalidName");
                }
        }

        public org.omg.CORBA.Object resolve(String name) {

                System.out.println("BEGIN resolve");

                org.omg.CORBA.Object obj = null;

                try {
                        obj = ns.resolve_str(name);
                } catch (NotFound e) {
                        System.out.println("FAILL resolve NotFound");
                } catch (CannotProceed e) {
                        System.out.println("FAILL resolve CannotProceed");
                } catch (InvalidName e) {
                        System.out.println("FAILL resolve InvalidName");
                }

                return obj;
        }

        public static void main(String args[]) {
                NSList wrapper = new NSList();
                wrapper.initORB();
                wrapper.initNS();
                wrapper.run();
        }
}

Run command line:

:-# cat t.sh
#!/bin/ksh

java -d64 -classpath /
./:/
/vendorpackages/PrismTech/JACORB/lib/avalon-framework.jar:/
/vendorpackages/PrismTech/JACORB/lib/jacorb.jar:/
/vendorpackages/PrismTech/JACORB/lib/logkit.jar:/
$CLASSPATH /
NSList