命名服务

Posted 2023-05-19 百小僧

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命名服务

using System;

namespace Microsoft.Extensions.DependencyInjection

    public static class NamedServiceExtensions
    
        private delegate TService Resolver<out TService>(IServiceProvider serviceProvider, string serviceName);

        public static TService GetNamedService<TService>(
            this IServiceProvider provider, string serviceName)
        
            return ((Resolver<TService>)provider
                    .GetService(typeof(Resolver<TService>)))
                ?.Invoke(provider, serviceName);
        

        public static IServiceCollection AddNamedTransient<TService, TImplementation>(
            this IServiceCollection services, string name) where TService : class where TImplementation : class, TService
        
            services.AddTransient<TService, TImplementation>();
            services.AddTransient(provider =>
                (Resolver<TService>)((sp, sn) => sn == name ? sp.GetService<TService>() : null));
            return services;
        

        public static IServiceCollection AddNamedScoped<TService, TImplementation>(
            this IServiceCollection services, string name) where TService : class where TImplementation : class, TService
        
            services.AddScoped<TService, TImplementation>();
            services.AddTransient(provider =>
                (Resolver<TService>)((sp, sn) => sn == name ? sp.GetService<TService>() : null));
            return services;
        

        public static IServiceCollection AddNamedSingleton<TService, TImplementation>(
            this IServiceCollection services, string name) where TService : class where TImplementation : class, TService
        
            services.AddSingleton<TService, TImplementation>();
            services.AddTransient(provider =>
                (Resolver<TService>)((sp, sn) => sn == name ? sp.GetService<TService>() : null));
            return services;
        
    


var services = new ServiceCollection();

services.AddNamedTransient<IMyService, MyService>("serviceA");
services.AddNamedScoped<IMyService, MyOtherService>("serviceB");
services.AddNamedSingleton<IMyService, MyThirdService>("serviceC");

var serviceProvider = services.BuildServiceProvider();

var serviceA = serviceProvider.GetNamedService<IMyService>("serviceA");
var serviceB = serviceProvider.GetNamedService<IMyService>("serviceB");
var serviceC = serviceProvider.GetNamedService<IMyService>("serviceC");

Corba 命名服务

【中文标题】Corba 命名服务【英文标题】：Corba naming service 【发布时间】：2011-12-19 18:15:33 【问题描述】：

我需要一些帮助...

我必须将 ma Corba 服务器与一个 Java Web 服务通信... 所以我必须确定命名服务.. 对吗？？

我杀死了端口 2809 中的 omniNames 并运行代码： tnameserv -ORBport 2809

给我

初始命名上下文： IOR：000000000000002b49444c3a6f6d672e6f72672f436f734e616d696e672f4e616d696e67436f6e746578744578743a312e300000000000010000000000000096000102000000000a3132372e302e312e3100038400000045afabcb0000000020000f424000000001000000000000000200000008526f6f74504f41000000000d544e616d65536572766963650000000000000008000000010000000114000000000000020000000100000020000000000001000100000002050100010001002000010109000000010001010000000026000000020002 TransientNameServer：将初始对象引用的端口设置为：900 准备好了。

在我运行 server.py 并返回异常之后：

文件“server.py”，第 28 行，在 obj = orb.resolve_initial_references("NameService") 文件“/usr/lib/python2.7/dist-packages/omniORB/CORBA.py”，第 576 行，在 resolve_initial_references return _omnipy.orb_func.resolve_initial_references(self, identifier) omniORB.CORBA.NO_RESOURCES: CORBA.NO_RESOURCES(omniORB.NO_RESOURCES_InitialRefNotFound, CORBA.COMPLETED_NO)

我要做什么？

【问题讨论】：

【参考方案1】：

我不是 Java 名称服务专家，但 Corba 规范的默认 orb 是 2809。虽然 java 默认值为 900。您的名称服务从 900 开始，就像它告诉您的那样，但 omniorb 会在 2809 处查找它。

Web 说 tnameserv 的语法是：