一种提升连接Dynamics 365性能的方法

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最近做代码审查，有个建议是Improve Microsoft Dynamics CRM service channel allocation performance的建议，请教了微软专家，同事也参考了官方的文章：Best practices for developing with Dynamics 365 for Customer Engagement ，Get了一下新技能，下面我做一次传声筒和翻译器，请听我讲来。

为了更好的看到效果，我这里使用了多个线程来凸显效果。我以前的项目，不在Dynamics 365中使用组织服务的话，一般都是每次查询会建立一次连接，代码类似如下：

using Microsoft.Xrm.Sdk;using Microsoft.Xrm.Sdk.Query;using Microsoft.Xrm.Tooling.Connector;using System;using System.ServiceModel;using System.Threading;namespace LuoYongLab{    class Program    {        static void Main(string[] args)        {            try            {                for (var i = 0; i < 5; i++)                {                    ThreadStart tStart = new ThreadStart(Work);                    Thread thread = new Thread(tStart);                    thread.Start();                }                Console.WriteLine("程序运行完成！");                Console.ReadKey();            }            catch (FaultException ex)            {                Console.WriteLine("程序出现异常:ex.Message=" + ex.Message);                Console.ReadKey();            }        }        static void Work()        {            Console.WriteLine("线程开始" + DateTime.Now.ToLongTimeString() + ";线程ID:" + Thread.CurrentThread.ManagedThreadId);            var crmSvc = new CrmServiceClient(new System.Net.NetworkCredential("crmadmin@luoyong.me", "Pass", null), Microsoft.Xrm.Tooling.Connector.AuthenticationType.IFD, "demo.luoyong.me", "443", "demo", useUniqueInstance: false, useSsl: true);            Console.WriteLine("线程ID: " + Thread.CurrentThread.ManagedThreadId + ";Token过期时间：" + crmSvc.OrganizationServiceProxy.SecurityTokenResponse.Response.Lifetime.Expires);            if (crmSvc.IsReady)            {                QueryExpression qe = new QueryExpression("organization");                qe.ColumnSet = new ColumnSet("languagecode", "basecurrencyid");                EntityCollection ec = crmSvc.RetrieveMultiple(qe);                if (ec.Entities.Count >= 1)                {                    Console.WriteLine("线程ID: " + Thread.CurrentThread.ManagedThreadId + ";组织偏好语言:" + ec.Entities[0].GetAttributeValue<int>("languagecode"));                }            }            Console.WriteLine("线程结束" + DateTime.Now.ToLongTimeString() + ";线程ID:" + Thread.CurrentThread.ManagedThreadId);        }    }}

效果如下，可以看到大概需要7秒钟。

我用fiddler抓包，你会发现每次认证都会下载元数据，一共下载了5次。

如果我改动代码如下，类 ManagedTokenOrganizationServiceProxy 代码来自Ali Sharifi 的文章 REFRESH SECURITY TOKEN FOR MICROSOFT DYNAMICS CRM CONNECTION ，但是我发现没什么用，因为 this._proxy.SecurityTokenResponse == null，所以我这里不会使用。

using Microsoft.Xrm.Sdk;using Microsoft.Xrm.Sdk.Client;using Microsoft.Xrm.Sdk.Query;using System;using System.Configuration;using System.ServiceModel;using System.Threading;namespace ConsoleApp{    class Program    {        public static IServiceManagement<IOrganizationService> sm;        public static AuthenticationCredentials authCredentials;        static void Main(string[] args)        {            sm = ServiceConfigurationFactory.CreateManagement<IOrganizationService>(new Uri(ConfigurationManager.AppSettings["orgUrl"]));            authCredentials = new AuthenticationCredentials();            authCredentials.ClientCredentials.UserName.UserName = ConfigurationManager.AppSettings["userName"];            authCredentials.ClientCredentials.UserName.Password = ConfigurationManager.AppSettings["passWord"];            authCredentials = sm.Authenticate(authCredentials);            try            {                for (var i = 0; i < 5; i++)                {                    ThreadStart tStart = new ThreadStart(Work);                    Thread thread = new Thread(tStart);                    thread.Start();                }                Console.WriteLine("程序运行完成！");                Console.ReadKey();            }            catch (FaultException ex)            {                Console.WriteLine("程序出现异常:ex.Message=" + ex.Message);                Console.ReadKey();            }        }        static void Work()        {            Console.WriteLine("线程开始" + DateTime.Now.ToLongTimeString() + ";线程ID:" + Thread.CurrentThread.ManagedThreadId);            OrganizationServiceProxy orgSvc = new OrganizationServiceProxy(sm, authCredentials.ClientCredentials);            //OrganizationServiceProxy orgSvc = new OrganizationServiceProxy(sm, authCredentials.SecurityTokenResponse);            //ManagedTokenOrganizationServiceProxy orgSvc = new ManagedTokenOrganizationServiceProxy(sm, authCredentials.ClientCredentials);            QueryExpression qe = new QueryExpression("organization");            qe.ColumnSet = new ColumnSet("languagecode", "basecurrencyid");            EntityCollection ec = orgSvc.RetrieveMultiple(qe);            if (ec.Entities.Count >= 1)            {                Console.WriteLine("线程ID: " + Thread.CurrentThread.ManagedThreadId + ";组织偏好语言:" + ec.Entities[0].GetAttributeValue<int>("languagecode"));            }            Console.WriteLine("线程结束" + DateTime.Now.ToLongTimeString() + ";线程ID:" + Thread.CurrentThread.ManagedThreadId);        }    }}

using Microsoft.Xrm.Sdk;using Microsoft.Xrm.Sdk.Client;using System;using System.ServiceModel;using System.ServiceModel.Description;namespace ConsoleApp{    public sealed class ManagedTokenOrganizationServiceProxy : OrganizationServiceProxy    {        private AutoRefreshSecurityToken<OrganizationServiceProxy, IOrganizationService> _proxyManager;        public ManagedTokenOrganizationServiceProxy(Uri serviceUri, ClientCredentials userCredentials)            : base(serviceUri, null, userCredentials, null)        {            this._proxyManager = new AutoRefreshSecurityToken<OrganizationServiceProxy, IOrganizationService>(this);        }        public ManagedTokenOrganizationServiceProxy(IServiceManagement<IOrganizationService> serviceManagement,            SecurityTokenResponse securityTokenRes)            : base(serviceManagement, securityTokenRes)        {            this._proxyManager = new AutoRefreshSecurityToken<OrganizationServiceProxy, IOrganizationService>(this);        }        public ManagedTokenOrganizationServiceProxy(IServiceManagement<IOrganizationService> serviceManagement,            ClientCredentials userCredentials)            : base(serviceManagement, userCredentials)        {            this._proxyManager = new AutoRefreshSecurityToken<OrganizationServiceProxy, IOrganizationService>(this);        }        protected override void AuthenticateCore()        {            this._proxyManager.PrepareCredentials();            base.AuthenticateCore();        }        protected override void ValidateAuthentication()        {            this._proxyManager.RenewTokenIfRequired();            base.ValidateAuthentication();        }    }    ///<summary>    /// Class that wraps acquiring the security token for a service    /// </summary>    public sealed class AutoRefreshSecurityToken<TProxy, TService>        where TProxy : ServiceProxy<TService>        where TService : class    {        private TProxy _proxy;        ///<summary>        /// Instantiates an instance of the proxy class        /// </summary>        /// <param name="proxy">Proxy that will be used to authenticate the user</param>        public AutoRefreshSecurityToken(TProxy proxy)        {            if (null == proxy)            {                throw new ArgumentNullException("proxy");            }            this._proxy = proxy;        }        ///<summary>        /// Prepares authentication before authenticated        /// </summary>        public void PrepareCredentials()        {            if (null == this._proxy.ClientCredentials)            {                return;            }            switch (this._proxy.ServiceConfiguration.AuthenticationType)            {                case AuthenticationProviderType.ActiveDirectory:                    this._proxy.ClientCredentials.UserName.UserName = null;                    this._proxy.ClientCredentials.UserName.Password = null;                    break;                case AuthenticationProviderType.Federation:                case AuthenticationProviderType.LiveId:                    this._proxy.ClientCredentials.Windows.ClientCredential = null;                    break;                default:                    return;            }        }        ///<summary>        /// Renews the token (if it is near expiration or has expired)        /// </summary>        public void RenewTokenIfRequired()        {            if (null != this._proxy.SecurityTokenResponse &&            DateTime.UtcNow.AddMinutes(15) >= this._proxy.SecurityTokenResponse.Response.Lifetime.Expires)            {                try                {                    this._proxy.Authenticate();                }                catch (CommunicationException)                {                    if (null == this._proxy.SecurityTokenResponse ||                        DateTime.UtcNow >= this._proxy.SecurityTokenResponse.Response.Lifetime.Expires)                    {                        throw;                    }                }            }        }    }}

我们可以看到执行时间也会缩短，从之前的大概需要7秒降低到需要1秒，速度提升不少。

我们看看Fiddler抓包效果，仅仅只有一次下载元数据，而且因为缓存执行的非常快。

如果要缓存的话，我这里在Application Start事件时候缓存代码如下，当然要添加对 System.Runtime.Caching 的引用。

using System.Runtime.Caching;            ObjectCache cache == =<IOrganizationService> sm = ServiceConfigurationFactory.CreateManagement<IOrganizationService>( Uri(ConfigurationManager.AppSettings[= = ConfigurationManager.AppSettings[= ConfigurationManager.AppSettings[, sm.Authenticate(authCredentials), policy);

然后在代码中获取组织服务就用如下代码：

using System.Runtime.Caching;ObjectCache cache ==  OrganizationServiceProxy(((IServiceManagement<IOrganizationService>)cache[]), ((AuthenticationCredentials)cache[]).ClientCredentials);

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