在WCF服务通道调度程序上安装IErrorHandler

Question

我想在WCF服务上安装IErrorHandler的实现.

我目前正在使用此代码,它似乎没有做任何事情:

logServiceHost = new ServiceHost(typeof(Logger));
logServiceHost.AddServiceEndpoint(typeof(ILogger), binding, address);

// Implementation of IErrorHandler.
var errorHandler = new ServiceErrorHandler();

logServiceHost.Open();

// Add error handler to all channel dispatchers.
foreach (ChannelDispatcher dispatcher in logServiceHost.ChannelDispatchers)
{
    dispatcher.ErrorHandlers.Add(errorHandler);
}

我见过的所有代码示例(包括在我用于WCF的书中)都显示了如何使用自定义创建的IServiceBehavior来安装错误扩展.这是强制性的,还是我的方法也应该有效？

Answer 1

以下是我如何使用它:

创建一个实现IServiceBehavior的类.服务行为将添加实现IErrorHandler的类:

public class GlobalExceptionHandlerBehavior : IServiceBehavior
{

    public void AddBindingParameters(ServiceDescription serviceDescription, System.ServiceModel.ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collection<ServiceEndpoint> endpoints, System.ServiceModel.Channels.BindingParameterCollection bindingParameters)
    {
    }

    public void ApplyDispatchBehavior(ServiceDescription serviceDescription, System.ServiceModel.ServiceHostBase serviceHostBase)
    {
        foreach (ChannelDispatcherBase dispatcherBase in
             serviceHostBase.ChannelDispatchers)
        {
            var channelDispatcher = dispatcherBase as ChannelDispatcher;
            if (channelDispatcher != null)
                channelDispatcher.ErrorHandlers.Add(new ServiceErrorHandler());
        }

    }

    public void Validate(ServiceDescription serviceDescription, System.ServiceModel.ServiceHostBase serviceHostBase)
    {
    }
}

在设置主机befor调用时插入行为.Open():

logServiceHost.Description.Behaviors.Insert(0, new GlobalExceptionHandlerBehavior());

然后,您应该能够在ServiceErrorHandler类中的ErrorHandler()方法中放置一个断点,它应该为您打破.这不需要xml配置,完全由代码驱动.