如何在未处理的错误时停止自主托管的WCF服务？

编程入门行业动态更新时间:2024-10-28 02:32:37

本文介绍了如何在未处理的错误时停止自主托管的WCF服务？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我有一个自主托管的WCF服务作为Windows服务运行。对于测试，我将其作为控制台应用程序运行。

我想捕获服务中发生的所有未处理的异常并关闭主机。我想捕获在产生响应时发生的所有非FaultExceptions，也可以捕获在空闲模式中抛出的所有异常，即从一些工作线程抛出。

任何线索？ p>

App.config：

<？xml version =1.0 encoding =utf-8？> < configuration> < system.serviceModel> <行为> < serviceBehaviors> < behavior name =TestServiceBahavior> < serviceMetadata httpGetEnabled =true/> < / behavior> < / serviceBehaviors> < / behavior> < services> < service behaviorConfiguration =TestServiceBahaviorname =WcfErrorHandling.TestService> < host> < baseAddresses> < add baseAddress =http：// localhost：8001 / TestService/> < / baseAddresses> < / host> < endpoint address =binding =basicHttpBinding bindingConfiguration =contract =WcfErrorHandling.ITestService/> < endpoint address =mexbinding =mexHttpBinding contract =IMetadataExchange/> < / service> < / services> < /system.serviceModel> < / configuration>

代码：

使用系统; 使用System.Linq; 使用System.ServiceModel; 使用System.ServiceModel.Channels; 使用System.ServiceModel.Dispatcher; 命名空间WcfErrorHandling { [ServiceContract] 接口ITestService { [OperationContract] string SayHello（string param） ; public class TestService：ITestService { public string SayHello（string param） { if（param ==ae ） throw new ArgumentException（argument exception）; if（param ==fe）抛出新的FaultException（fault exception）; returnhello; } public class TestHost：ServiceHost，IErrorHandler { public TestHost（）：base（typeof（TestService）） {} public void Start（） { AppDomain.CurrentDomain.UnhandledException + = （sender，ea）=> ; UnhandledExceptionHandler（ea.ExceptionObject为异常）; Open（）; foreach（ChannelDispatchers.OfType&ChannelDispatcher>（）中的var channelDispatcher） channelDispatcher.ErrorHandlers.Add（this）; } public void ProvideFault（异常错误，MessageVersion版本，ref消息错误） { // do nothing } public bool HandleError（异常错误） { if（！（error is FaultException）） UnhandledExceptionHandler（error）; 返回true; } private void UnhandledExceptionHandler（Exception ex） { Close（）; Environment.Exit（1）; } } public class Program { public static void Main（string [] args） { var testHost = new TestHost（）; testHost.Start（）; Console.Out.WriteLine（按任意键退出...）; Console.ReadKey（）; testHost.Close（）; } } }

解决方案

有同样的问题，这解决了我：

使您的服务实现此界面：

public class MyService：System.ServiceModel.Description.IServiceBehavior

实现如下：

public void AddBindingParameters（System.ServiceModel.Description.ServiceDescription serviceDescription，ServiceHostBase serviceHostBase，System.Collections。 ObjectModel.Collection< System.ServiceModel.Description.ServiceEndpoint>端点，System.ServiceModel.Channels.BindingParameterCollection bindingParameters） { return; } public void ApplyDispatchBehavior（System.ServiceModel.Description.ServiceDescription serviceDescription，ServiceHostBase serviceHostBase） { foreach（ChannelDispatcher channel in serviceHostBase.ChannelDispatchers）{channel。 ErrorHandlers.Add（new ErrorHandler（））; } public void Validate（System.ServiceModel.Description.ServiceDescription serviceDescription，ServiceHostBase serviceHostBase） { return; }

添加这个类：

public class ErrorHandler：IErrorHandler { bool IErrorHandler.HandleError（异常错误） {return true; void IErrorHandler.ProvideFault（异常错误，System.ServiceModel.Channels.MessageVersion版本，引用System.ServiceModel.Channels.Message错误） {return; } }

现在在HandleError上设置一个断点，它会显示异常

I have a self-hosted WCF service that is running as a Windows Service. For the tests, I'm running it as a console application.

I'd like to catch all unhandled exceptions that happen in the service and shutdown the host. I'd like to catch all non FaultExceptions that happen when producing a response, but also all exceptions that are thrown in "idle mode" - i.e. thrown from some worker threads.

Unfortunatelly, I can't handle the exceptions neither by IErrorHandler (not called), nor by AppDomain.CurrentDomain.UnhandledException (not raised).

Any clues?

App.config:

<?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <behaviors> <serviceBehaviors> <behavior name="TestServiceBahavior"> <serviceMetadata httpGetEnabled="true" /> </behavior> </serviceBehaviors> </behaviors> <services> <service behaviorConfiguration="TestServiceBahavior" name="WcfErrorHandling.TestService"> <host> <baseAddresses> <add baseAddress="localhost:8001/TestService" /> </baseAddresses> </host> <endpoint address="" binding="basicHttpBinding" bindingConfiguration="" contract="WcfErrorHandling.ITestService" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> </services> </system.serviceModel> </configuration>

The code:

using System; using System.Linq; using System.ServiceModel; using System.ServiceModel.Channels; using System.ServiceModel.Dispatcher; namespace WcfErrorHandling { [ServiceContract] interface ITestService { [OperationContract] string SayHello(string param); } public class TestService : ITestService { public string SayHello(string param) { if (param == "ae") throw new ArgumentException("argument exception"); if (param == "fe") throw new FaultException("fault exception"); return "hello"; } } public class TestHost : ServiceHost, IErrorHandler { public TestHost() : base(typeof(TestService)) { } public void Start() { AppDomain.CurrentDomain.UnhandledException += (sender, ea) => UnhandledExceptionHandler(ea.ExceptionObject as Exception); Open(); foreach (var channelDispatcher in ChannelDispatchers.OfType<ChannelDispatcher>()) channelDispatcher.ErrorHandlers.Add(this); } public void ProvideFault(Exception error, MessageVersion version, ref Message fault) { // do nothing } public bool HandleError(Exception error) { if (!(error is FaultException)) UnhandledExceptionHandler(error); return true; } private void UnhandledExceptionHandler(Exception ex) { Close(); Environment.Exit(1); } } public class Program { public static void Main(string[] args) { var testHost = new TestHost(); testHost.Start(); Console.Out.WriteLine("Press any key to exit..."); Console.ReadKey(); testHost.Close(); } } }

解决方案

Had the same problem, this solved it for me:

Make your service implement this interface:

public class MyService : System.ServiceModel.Description.IServiceBehavior

Implement it like this:

public void AddBindingParameters(System.ServiceModel.Description.ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collection<System.ServiceModel.Description.ServiceEndpoint> endpoints, System.ServiceModel.Channels.BindingParameterCollection bindingParameters) { return; } public void ApplyDispatchBehavior(System.ServiceModel.Description.ServiceDescription serviceDescription, ServiceHostBase serviceHostBase) { foreach (ChannelDispatcher channel in serviceHostBase.ChannelDispatchers) { channel.ErrorHandlers.Add(new ErrorHandler()); } } public void Validate(System.ServiceModel.Description.ServiceDescription serviceDescription, ServiceHostBase serviceHostBase) { return; }

And add this class:

public class ErrorHandler : IErrorHandler { bool IErrorHandler.HandleError(Exception error) { return true; } void IErrorHandler.ProvideFault(Exception error, System.ServiceModel.Channels.MessageVersion version, ref System.ServiceModel.Channels.Message fault) { return; } }