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，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("[email protected]", "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：

using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Client;
using Microsoft.Xrm.Sdk.Query;
using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Threading;

namespace LuoYongLab
{
    class Program
    {
        public static IServiceManagement<IOrganizationService> sm;
        static void Main(string[] args)
        {
            sm = ServiceConfigurationFactory.CreateManagement<IOrganizationService>(new Uri("https://demo.luoyong.me/XRMServices/2011/Organization.svc"));
            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()
        {
            ClientCredentials credentials = new ClientCredentials();
            credentials.UserName.UserName = "[email protected]";
            credentials.UserName.Password = "Pass";
            Console.WriteLine("线程开始" + DateTime.Now.ToLongTimeString() + ";线程ID:" + Thread.CurrentThread.ManagedThreadId);
            OrganizationServiceProxy orgSvc = new OrganizationServiceProxy(sm, credentials);
            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);            
        }
    }
}

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。

在项目实战的话，我们可以在Application_Start的代码执行前面声明一个类似如下的全局静态变量：

public static IServiceManagement<IOrganizationService> sm;

然后在Application_Start的代码中进行类似如下初始化：

 sm = ServiceConfigurationFactory.CreateManagement<IOrganizationService>(new Uri("https://demo.luoyong.me/XRMServices/2011/Organization.svc"));

最后在所有连接的地方就可以使用类似如下的代码进行连接了：

ClientCredentials credentials = new ClientCredentials();
credentials.UserName.UserName = "[email protected]";
credentials.UserName.Password = "Pass";
OrganizationServiceProxy orgSvc = new OrganizationServiceProxy(LuoYongApp.sm, credentials);

一种提升连接Dynamics 365性能的方法

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