WCF，很好，却又麻烦，很多时候不想用WCF的原因就是：用这个真麻烦...
麻烦的地方，比如：
所以想了个办法来简化这些，主要思路是：
完成后，WCF客户端（包括WCF服务内部调用了其他WCF服务的服务...）调用代码会变成如下方式：
//不支持事务的调用方式 IUser userSrv = ICSFactory.Create<IUser>(); var result = userSrv.GetUserName("1", "2", "3"); ICSFactory.Close(userSrv); //支持事务的调用方式 string result = string.Empty; using (TransactionScope ts = new TransactionScope()) { IUser userSrv = ICSFactory.Create<IUser>(); IAdmin adminSrv = ICSFactory.Create<IAdmin>(); result = userSrv.GetUserName("1", "2", "3"); result = adminSrv.CheckPermission(100).ToString(); ts.Complete(); ICSFactory.Close(userSrv); ICSFactory.Close(adminSrv); }
WCF客户端的配置信息去哪了呢？ A：在appSetting中，有个key，用来表示服务配置信息文件所在路径，如：\\fs\root\a2d.service.config，配置文件如下：
<?xml version="1.0" encoding="utf-8" ?> <A2D> <ServiceLocator> <Service ContractNamespace="DEsbInterface" Contract="IUser"> <Url EndpointType="Tcp">net.tcp://192.168.1.100:9999/usersrv</Url> </Service> <Service ContractNamespace="DEsbInterface" Contract="IAdmin"> <Url EndpointType="Tcp">net.tcp://192.168.1.100:9998/adminsrv</Url> </Service> </ServiceLocator> </A2D>
如果调用WCF服务的客户端只有一个程序，就没多大用了，但是如果有很多客户端程序，那就有用了，如下场景：
4台server都作为客户端进行WCF服务的调用
ICS原理：
在本例中，ICS其实就是ICSFactory，用来建立WCF服务代理，通过代码方式加入binding、address、transaction信息，底层调用的是ChannelFactory来建立通信，代码如下：
public class ICSFactory { /// <summary> /// 创建WCF服务代理对象 /// </summary> /// <typeparam name="T">WCF的Contract类型</typeparam> /// <returns></returns> public static T Create<T>() { string contractNamespace = typeof(T).Namespace; string contract = typeof(T).Name; //根据WCF Contract信息找到相应的位置信息 Location location = ServiceLocator.Locate(contractNamespace, contract); //生成绑定信息 NetTcpBinding binding = new NetTcpBinding(); binding.ReceiveTimeout = new TimeSpan(0, 10, 0); binding.Security.Mode = SecurityMode.None; binding.Security.Transport.ClientCredentialType = TcpClientCredentialType.None; //事务设置 binding.TransactionFlow = true; binding.TransactionProtocol = TransactionProtocol.OleTransactions; //地址信息 EndpointAddress address = new EndpointAddress(location.Url); //建立信道 T broker=ChannelFactory<T>.CreateChannel(binding, address); //返回代理对象 return broker; } /// <summary> /// Dispose代理对象 /// </summary> /// <param name="broker"></param> public static void Close(object broker) { if (broker == null) return; IDisposable disposable = broker as IDisposable; if (disposable == null) return; disposable.Dispose(); } }
Service Locator Service原理：
也就是ServiceLocator.Locate函数。
程序启动时会根据配置读取config文件的xml到内存对象中：Service、Url。具体代码略。
Locate函数的代码如下：
/// <summary> /// 根据Contract的命名空间及Contract名找到服务的真实地址信息 /// </summary> /// <param name="contractNamespace"></param> /// <param name="contract"></param> /// <returns></returns> public static Location Locate(string contractNamespace, string contract) { Service srv=null; string key = string.Format("{0}.{1}", contractNamespace, contract); if (!serviceCache.ContainsKey(key)) { srv = FindService(contractNamespace, contract, srv); serviceCache[key] = srv; } else { srv=serviceCache[key]; } if(srv.Urls==null||srv.Urls.Count==0) throw new Exception(string.Format("Service‘ url not found [{0}.{1}]", contractNamespace, contract)); Url url=srv.Urls.First(); Location location = new Location(); location.EndpointType = url.EndpointType; location.Url = url.ReferenceUrl;return location; } private static Service FindService(string contractNamespace, string contract, Service srv) { List<Service> matchedServices = LocatorServiceConfiguration.Services.Where(t => t.Contract.CompareTo(contract) == 0 && t.ContractNamespace.CompareTo(contractNamespace) == 0 ).ToList(); if (matchedServices == null || matchedServices.Count == 0) throw new Exception(string.Format("Service not found [{0}.{1}]", contractNamespace, contract)); srv = matchedServices.First(); return srv; }
原文：http://www.cnblogs.com/aarond/p/WCF.html