服务器端的MEF（WCF） [英] MEF at server side (WCF)

问题描述

您好，我正在寻找有关如何在WCF中使用MEF的一些指导。
我的服务配置如下： InstanceContextMode = InstanceContextMode 。PerCall，ConcurrencyMode = ConcurrencyMode 。多个。
我需要吗？ WCF操作行为会在每次操作调用时创建一个新的目录？
我可以只有一个目录由所有操作共享吗？

祝你...帮助。

---

philippe

Hello,

I'm looking for some guidance on how to use MEF with WCF.
My services are configured as follows : InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Multiple.
Do I need a WCF operation behavior that would create a new catalog on each operation call ?
Can I have only one catalog shared by all operations ?
...

Thanks for your help.

---

philippe

推荐答案

嗨Philippe，

在WCF中，IInstanceProvider是如果要覆盖对象创建的自定义行为，则覆盖的接口。您的IInstanceProvider实现需要与服务行为或端点行为联系。

使用ServiceBehavior：

public void ApplyDispatchBehavior（ServiceDescription serviceDescription，
                                           System.ServiceModel.ServiceHostBase serviceHostBase）
   &NBSP ;    {
            foreach（serviceHostBase.ChannelDispatchers中的var channelDispatcherBase）
            {
                VAR channelDispatcher = channelDispatcherBase作为ChannelDispatcher;
               
                if（channelDispatcher == null）
                {继续;}               的foreach（在channelDispatcher.Endpoints VAR endpointDispatcher）
                {
&n&n;                  endpointDispatcher.DispatchRuntime.InstanceProvider =
                        新的 MyCustomInstanceProvider（）;
                }            }        HTH，

- - larsw

Hi Philippe,

 In WCF, IInstanceProvider is the interface to override if you want to override the custom behavior of object creation. You're IInstanceProvider-implementation needs to be wired up with a service behavior or endpoint behavior.

using a ServiceBehavior:

public void ApplyDispatchBehavior(ServiceDescription serviceDescription,
                                          System.ServiceModel.ServiceHostBase serviceHostBase)
        {
            foreach (var channelDispatcherBase in serviceHostBase.ChannelDispatchers)
            {
                var channelDispatcher = channelDispatcherBase as ChannelDispatcher;
               
                if (channelDispatcher == null)
                {continue;}

                foreach (var endpointDispatcher in channelDispatcher.Endpoints)
                {
                    endpointDispatcher.DispatchRuntime.InstanceProvider =
                        new MyCustomInstanceProvider();
                }
            }
        }



HTH,

 --larsw

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