c# – IEndpointBehavior生命周期/日志服务调用

这是我目前的代码：

public class LoggingBehaviorExtender : BehaviorExtensionElement
{
    public override Type BehaviorType => typeof(LoggingRequestExtender);
    protected override object CreateBehavior() { return new LoggingRequestExtender(); }
}

public class LoggingRequestExtender : IClientMessageInspector,IEndpointBehavior
{
    public string Request { get; private set; }
    public string Response { get; private set; }

    #region IClientMessageInspector

    public virtual object BeforeSendRequest(ref System.ServiceModel.Channels.Message request,System.ServiceModel.IClientChannel channel)
    {
        Request = request.ToString();
        Response = null;
        return null;
    }
    public virtual void AfterReceiveReply(ref System.ServiceModel.Channels.Message reply,object correlationState)
    {
        Response = reply.ToString();
    }

    #endregion

    #region IEndpointBehavior

    public void AddBindingParameters(ServiceEndpoint endpoint,BindingParameterCollection bindingParameters) { }

    public void ApplyClientBehavior(ServiceEndpoint endpoint,ClientRuntime clientRuntime)
    {
        clientRuntime.MessageInspectors.Add(this);
    }

    public void ApplyDispatchBehavior(ServiceEndpoint endpoint,EndpointDispatcher endpointDispatcher) { }

    public void Validate(ServiceEndpoint endpoint) { }

    #endregion
}

然后,当我到达记录点时,我提取行为……

var lre = client.Endpoint.Behaviors.OfType<LoggingRequestExtender>().FirstOrDefault();
var req = lre?.Request;
var resp = lre?.Response;

将调试日志记录添加到LoggingRequestExtender,我发现它只为多个请求实例化了一次.

有没有办法确保为每个线程实例化这个行为类？或者,在进行服务呼叫时,是否有更好的方法来获取完整的请求/响应主体？

编辑/部分答案：

自写这篇文章以来,我发现BeforeSendRequest返回的值作为correlationState传递给AfterReceiveReply,因此我可以使用guid连接请求和响应：

public virtual object BeforeSendRequest(ref System.ServiceModel.Channels.Message request,System.ServiceModel.IClientChannel channel)
{
    var guid = Guid.NewGuid();
    WebServiceLog.LogCallStart(guid,channel.RemoteAddress.ToString(),request.ToString());
    return guid;
}

public virtual void AfterReceiveReply(ref System.ServiceModel.Channels.Message reply,object correlationState)
{
    Guid guid = (Guid)correlationState;
    WebServiceLog.LogCallEnd(guid,reply.ToString());
}

我看到这种方法存在两个缺陷.一个是宜居的,这需要一个日志插入然后更新而不是单个插入.

第二个问题更多：在异常(例如超时)的情况下,我们从未点击AfterRecieveSupply,因此日志不知道发生了什么.我可以单独记录异常……

try
{
    response = client.SomeFunction(request);
}
catch (Exception ex)
{
    AppLog.Error("Some function failed",ex);
}

…但我看不到在BeforeSendRequest / AfterReceiveReply之外访问guid的方法,所以我没有任何东西可以将异常日志绑定到服务请求日志.