Question

实现如何将可移植拦截器用于本地对象的实现在JacORB 3中发生了变化，如在发行说明中说明：“为本地对象正确实现了便携式拦截器。” 这个新的实施似乎会引起一些问题;重现问题的最简单方法是从sas-demo（jacorb附带的那个）修改GssUpServer.java：

public class GssUpServer extends SASDemoPOA {

        private ORB orb;
        private boolean calledPrintSAS = false; // added

        public GssUpServer(ORB orb) {
            this.orb = orb;
        }

        public void printSAS() {
            try {
                org.omg.PortableInterceptor.Current current = (org.omg.PortableInterceptor.Current) orb
                        .resolve_initial_references("PICurrent");
                org.omg.CORBA.Any anyName = current
                        .get_slot(org.jacorb.security.sas.SASInitializer.sasPrincipalNamePIC);
                if (anyName.type().kind().value() == org.omg.CORBA.TCKind._tk_null) {
                    System.out.println("Null Name");
                } else {
                    String name = anyName.extract_string();
                    System.out.println("printSAS for user " + name);
                }

                // /* added
                if (!calledPrintSAS) {
                    calledPrintSAS = true;                    
                    // local call, (JacORB 3.x: throws NPE from SASClientInterceptor)
                    _this().printSAS();
                }
                // */
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
...
}

GssUpClient.bat后的Stacktrace：

2013-04-11 11:01:24.968 SEVERE unexpected exception during servant_preinvoke              org.jacorb.security.sas.SASClientInterceptor.send_request(SASClientInterceptor.java:194)
org.jacorb.orb.portableInterceptor.ClientInterceptorIterator.invoke(ClientInterceptorIterator.java:129)
org.jacorb.orb.portableInterceptor.AbstractInterceptorIterator.iterate(AbstractInterceptorIterator.java:66)
org.jacorb.orb.portableInterceptor.ClientInterceptorIterator.iterate(ClientInterceptorIterator.java:87)
org.jacorb.orb.DefaultClientInterceptorHandler.invokeInterceptors(DefaultClientInterceptorHandler.java:328)
org.jacorb.orb.DefaultClientInterceptorHandler.handle_send_request(DefaultClientInterceptorHandler.java:132)
org.jacorb.orb.Delegate.servant_preinvoke(Delegate.java:2505)
org.omg.CORBA.portable.ObjectImpl._servant_preinvoke(ObjectImpl.java:135)
org.jacorb.demo.sas._SASDemoStub.printSAS(_SASDemoStub.java:73)
org.jacorb.demo.sas.GssUpServer.printSAS(GssUpServer.java:46)
org.jacorb.demo.sas.SASDemoPOA._invoke(SASDemoPOA.java:47)
org.jacorb.poa.RequestProcessor.invokeOperation(RequestProcessor.java:348)
org.jacorb.poa.RequestProcessor.process(RequestProcessor.java:670)
org.jacorb.poa.RequestProcessor.run(RequestProcessor.java:820)
java.lang.NullPointerException
    at org.jacorb.security.sas.SASClientInterceptor.send_request(SASClientInterceptor.java:194)
    at org.jacorb.orb.portableInterceptor.ClientInterceptorIterator.invoke(ClientInterceptorIterator.java:129)
    at org.jacorb.orb.portableInterceptor.AbstractInterceptorIterator.iterate(AbstractInterceptorIterator.java:66)
    at org.jacorb.orb.portableInterceptor.ClientInterceptorIterator.iterate(ClientInterceptorIterator.java:87)
    at org.jacorb.orb.DefaultClientInterceptorHandler.invokeInterceptors(DefaultClientInterceptorHandler.java:328)
    at org.jacorb.orb.DefaultClientInterceptorHandler.handle_send_request(DefaultClientInterceptorHandler.java:132)
    at org.jacorb.orb.Delegate.servant_preinvoke(Delegate.java:2505)
    at org.omg.CORBA.portable.ObjectImpl._servant_preinvoke(ObjectImpl.java:135)
    at org.jacorb.demo.sas._SASDemoStub.printSAS(_SASDemoStub.java:73)
    at org.jacorb.demo.sas.GssUpServer.printSAS(GssUpServer.java:46)
    at org.jacorb.demo.sas.SASDemoPOA._invoke(SASDemoPOA.java:47)
    at org.jacorb.poa.RequestProcessor.invokeOperation(RequestProcessor.java:348)
    at org.jacorb.poa.RequestProcessor.process(RequestProcessor.java:670)
    at org.jacorb.poa.RequestProcessor.run(RequestProcessor.java:820)

以上代码在JacORB 2.3.1中运行良好。此问题的简单解决方法是将属性jacorb.isLocalHistoricalInterceptors设置为true; 但是，某些“内置”方法（例如_is_a()）不尊重此标志（因为这些方法直接使用is_really_local()检查对象局部性）。它似乎当本地调用时，这些“内置”方法调用从未使用过拦截器。

所以我的观察是：

JacorB 3.x似乎打破了本地调用的一些可移植拦截器（确切地说，需要连接对象的拦截器......）

JacorB 3.x似乎是第一个使用便携式拦截器进行_is_a()，_non_existent()，_interface()，_get_component()
的本地调用的JacORB

的

第一个问题是可解决的，因为有一个属性使JacORB 3.x作为旧版本工作。第二个（与第一个相结合）似乎真的很麻烦。

有没有人注意到这种行为，并且可以验证我怀疑这确实是JacORB 3.x中的缺陷，还是我错过了什么？

Answer 1

内置便携式拦截器，本地通话应正常工作;这听起来像个bug。实际上听起来像Using AMI+BiDir with jacorb。我还输入了http://www.jacorb.org/bugzilla/show_bug.cgi?id=957

JacORB 3.x中本地对象的便携式拦截器使用情况有限？

1 个答案: