如果用self-host的方式来加载服务的话,我们一般是用这样的代码:ServiceHost host1 = new ServiceHost(typeof(UserService)); 问题是,如果当你的服务很多的时候这样做是不胜其烦的,今天在看Ingo Rammer(大名鼎鼎的《Advanced .Net Remoting》作者)的Blog的时候,看到了他解决这一问题的方法:
一.服务配置在app.config或web.config中:
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using System;
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using System.Collections.Generic;
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using System.Reflection;
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using System.Configuration;
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using System.ServiceModel.Configuration;
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using System.ServiceModel;
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public class ServiceHostGroup
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{
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static List<ServiceHost> _hosts = new List<ServiceHost>();
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private static void OpenHost(Type t)
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{
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ServiceHost hst = new ServiceHost(t);
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hst.Open();
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_hosts.Add(hst);
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}
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public static void StartAllConfiguredServices()
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{
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Configuration conf =
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ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
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ServiceModelSectionGroup svcmod =
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(ServiceModelSectionGroup)conf.GetSectionGroup("system.serviceModel");
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foreach (ServiceElement el in svcmod.Services.Services)
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{
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Type svcType = Type.GetType(el.Name);
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if (svcType == null)
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throw new Exception("Invalid Service Type " + el.Name + " in configuration file.");
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OpenHost(svcType);
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}
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}
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public static void CloseAllServices()
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{
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foreach (ServiceHost hst in _hosts)
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{
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hst.Close();
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}
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}
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}
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二.服务配置在外部配置文件中:
Services.XML:
<configuredServices>
<service type="ServiceImplementation.ArticleService, ServiceImplementation" />
</configuredServices>
ServiceHostBase.cs:
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using System;
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using System.Collections.Generic;
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using System.Reflection;
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using System.Configuration;
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using System.ServiceModel.Configuration;
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using System.ServiceModel;
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using System.Xml;
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using System.Xml.Serialization;
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using System.IO;
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public class ServiceHostGroup
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{
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static List<ServiceHost> _hosts = new List<ServiceHost>();
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private static void OpenHost(Type t)
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{
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ServiceHost hst = new ServiceHost(t);
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Type ty = hst.Description.ServiceType;
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hst.Open();
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_hosts.Add(hst);
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}
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public static void StartAllConfiguredServices()
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{
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ConfiguredServices services = ConfiguredServices.LoadFromFile("services.xml");
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foreach (ConfiguredService svc in services.Services)
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{
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Type svcType = Type.GetType(svc.Type);
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if (svcType == null) throw new Exception("Invalid Service Type " + svc.Type + " in configuration file.");
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OpenHost(svcType);
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}
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}
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public static void CloseAllServices()
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{
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foreach (ServiceHost hst in _hosts)
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{
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hst.Close();
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}
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}
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}
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[XmlRoot("configuredServices")]
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public class ConfiguredServices
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{
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public static ConfiguredServices LoadFromFile(string filename)
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{
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if (!File.Exists(filename)) return new ConfiguredServices();
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XmlSerializer ser = new XmlSerializer(typeof(ConfiguredServices));
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using (FileStream fs = File.OpenRead(filename))
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{
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return (ConfiguredServices) ser.Deserialize(fs);
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}
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}
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[XmlElement("service", typeof(ConfiguredService))]
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public List<ConfiguredService> Services = new List<ConfiguredService>();
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}
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public class ConfiguredService
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{
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[XmlAttribute("type")]
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public string Type;
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}
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鉴于本人的英文水平:),Ingo Rammer先生的说明大家还是去看原文吧。
Start ServiceHosts for all configured Services