我有一个与 .NET 4 WCF Web 服务通信的网站。该 WCF 服务连接到远程服务器上的 Dynamics GP Web 服务。两种 Web 服务都是自托管的(无 IIS)。
首次呼叫 GP 大约需要 12 秒才能完成!之后立即调用(即使在另一个 WCF 请求中)大约 100 毫秒,但如果我在两次调用之间等待一两分钟,它将再次需要 10 秒......
问题的原因可能是什么,我该如何解决?
我已经使用 SvcUtil 和 VS 2010 Add Service Reference 生成了一个代理,但两者都遇到了同样的问题。Dynamics GP代理文件很大3MB,不知道有没有关系。
我运行 Wireshark 来分析网络流量,实际的 tcp 请求-回复流似乎只需要不到一秒钟的时间。在发送请求之前似乎发生了一些事情,占用了 10 秒。
这是使用的代码:
Context context = new Context();
CompanyKey companyKey = new CompanyKey();
companyKey.Id = -1;
context.OrganizationKey = companyKey;
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
sw.Start();
_proxy = new DynamicsGPClient();
_proxy.ClientCredentials.Windows.ClientCredential.Domain = Domain;
_proxy.ClientCredentials.Windows.ClientCredential.UserName = Username;
_proxy.ClientCredentials.Windows.ClientCredential.Password = Password;
long openingMs = sw.ElapsedMilliseconds;
CustomerCriteria customerCriteria = new CustomerCriteria();
CustomerSummary[] gpCustomers = _proxy.GetCustomerList(customerCriteria, context);
long fctCallMs = sw.ElapsedMilliseconds;
...
if (_proxy != null && _proxy.State != System.ServiceModel.CommunicationState.Faulted) {
_proxy.Close();
}
这是app.config:
<system.serviceModel>
<bindings>
<wsHttpBinding>
<binding name="GPWebService" closeTimeout="00:01:00" openTimeout="00:01:00"
receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false"
transactionFlow="false" hostNameComparisonMode="StrongWildcard"
maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647"
messageEncoding="Text" textEncoding="utf-8"
useDefaultWebProxy="true" allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="2147483647"/>
<reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false"/>
<security mode="Message">
<transport clientCredentialType="Windows" proxyCredentialType="None" realm=""/>
<message clientCredentialType="Windows" negotiateServiceCredential="true" algorithmSuite="Default"/>
</security>
</binding>
</wsHttpBinding>
</bindings>
<client>
<endpoint address="http://192.168.x.y:48620/Dynamics/GPService/GPService" binding="wsHttpBinding"
bindingConfiguration="GPWebService"
contract="DynamicsGpService.DynamicsGP" name="GPWebService">
<identity>
<userPrincipalName value="DEV\gpeconnect"/>
</identity>
</endpoint>
</client>
</system.serviceModel>