[英]Dynamically update WCF Routing Service configuration at runtime
I have been following the WCF Routing Service tutorials on MSDN:我一直在关注 MSDN 上的 WCF 路由服务教程:
Dynamic Configuration 动态配置
Source (See code below) 来源(见下面的代码)
After much pain trying to convert the console examples to IIS hosted prototypes, I now have a WCF Routing Service which updates its configuration once every 5 seconds as per the tutorial.在尝试将控制台示例转换为 IIS 托管原型非常痛苦之后,我现在有一个 WCF 路由服务,它按照教程每 5 秒更新一次其配置。
I now need to trigger this update from a Web page instead of the timer auto updating every 5 seconds but cannot find any examples of how to do this.我现在需要从网页触发此更新,而不是每 5 秒自动更新一次计时器,但找不到有关如何执行此操作的任何示例。 Something like an admin screen which handles CRUD ops for endpoints stored in a DB.类似于管理屏幕的东西,它处理存储在数据库中的端点的 CRUD 操作。 If a user makes a change to the config, the Routing Service will need to update its configuration dynamically.如果用户对配置进行了更改,路由服务将需要动态更新其配置。
Apparently you can do something like this with UDP Announcements and Discovery Services, but I don't want that A simple endpoint which triggers the update called from another app will suffice.显然,您可以使用 UDP 公告和发现服务执行类似的操作,但我不希望触发从另一个应用程序调用的更新的简单端点就足够了。
How do I get a reference to the routing service UpdateBehavior
in order to manually call the UpdateRules
method?如何获取对路由服务UpdateBehavior
的引用以手动调用UpdateRules
方法?
using System;
using System.Collections.Generic;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Configuration;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.ServiceModel.Routing;
using System.Threading;
namespace ErpRoutingService
{
public class UpdateBehavior : BehaviorExtensionElement, IServiceBehavior
{
void IServiceBehavior.AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
{
}
void IServiceBehavior.ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
RulesUpdateExtension rulesUpdateExtension = new RulesUpdateExtension();
serviceHostBase.Extensions.Add(rulesUpdateExtension);
}
void IServiceBehavior.Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
}
class RulesUpdateExtension : IExtension<ServiceHostBase>, IDisposable
{
bool primary = false;
ServiceHostBase owner;
Timer timer;
void IExtension<ServiceHostBase>.Attach(ServiceHostBase owner)
{
this.owner = owner;
//Call immediately, then every 5 seconds after that.
this.timer = new Timer(this.UpdateRules, this, TimeSpan.Zero, TimeSpan.FromSeconds(5));
}
void IExtension<ServiceHostBase>.Detach(ServiceHostBase owner)
{
this.Dispose();
}
public void Dispose()
{
if (this.timer != null)
{
this.timer.Dispose();
this.timer = null;
}
}
void UpdateRules(object state)
{
//Updating Routing Configuration
RoutingConfiguration rc = new RoutingConfiguration();
var inspector = new ErpMessageInspectorBehavior();
if (this.primary)
{
ServiceEndpoint endPoint101 = new ServiceEndpoint(
ContractDescription.GetContract(typeof(IRequestReplyRouter)),
new BasicHttpBinding(),
new EndpointAddress("http://meldev:62395/ErpIntegrationService.svc"));
endPoint101.EndpointBehaviors.Add(inspector);
rc.FilterTable.Add(new MatchAllMessageFilter(), new List<ServiceEndpoint> { endPoint101 });
}
else
{
ServiceEndpoint endPoint102 = new ServiceEndpoint(
ContractDescription.GetContract(typeof(IRequestReplyRouter)),
new BasicHttpBinding(),
new EndpointAddress("http://meldev:62396/ErpIntegrationService.svc"));
endPoint102.EndpointBehaviors.Add(inspector);
rc.FilterTable.Add(new MatchAllMessageFilter(), new List<ServiceEndpoint> { endPoint102 });
}
this.owner.Extensions.Find<RoutingExtension>().ApplyConfiguration(rc);
this.primary = !this.primary;
}
}
public override Type BehaviorType
{
get { return typeof(UpdateBehavior); }
}
protected override object CreateBehavior()
{
return new UpdateBehavior();
}
}
}
Starting from your ServiceHost
instance it's pretty easy:从您的ServiceHost
实例开始,这很容易:
var updateBahvaior = serviceHost.Description.Behaviors.Find<UpdateBehavior>();
Then, if you expose a method that calls UpdateRules
method from the inner private class, you can call it.然后,如果您公开一个从内部私有类调用UpdateRules
方法的方法,则可以调用它。
您可能必须在自定义类中使用公共静态变量...
Found this document online.在网上找到了这个文档。 https://docs.microsoft.com/en-us/dotnet/framework/wcf/feature-details/routing-introduction#dynamic-configuration https://docs.microsoft.com/en-us/dotnet/framework/wcf/feature-details/routing-introduction#dynamic-configuration
RoutingExtension ApplyConfiguration would help here. RoutingExtension ApplyConfiguration 在这里会有所帮助。
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