我有 3 个 Restful 服务，我想将它们作为 Windows 服务托管。我创建了一个安装程序，它将同时托管所有三种服务。我想让我的安装程序有点可配置。我想向同一个安装程序添加新服务，而不需要它来编辑代码。
这是我当前的安装程序代码。在这里，我引用 dll 并托管它们。这只是任何 Windows 宿主项目的普通代码。
App.config 文件
<services>
<service name="Service1">
<endpoint binding="webHttpBinding" contract="IService1" ehaviorConfiguration="REST"/>
</service>
<service name="Service2">
<endpoint binding="webHttpBinding" contract="IService2" behaviorConfiguration="REST"/>
</service>
<service name="Service3">
<endpoint binding="webHttpBinding" contract="IService3" behaviorConfiguration="REST"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<serviceMetadata httpGetEnabled="True"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="REST">
<webHttp automaticFormatSelectionEnabled="true" defaultOutgoingResponseFormat="Json" helpEnabled="true"/>
</behavior>
</endpointBehaviors>
</behaviors>
安装程序中的代码。
public partial class Service : ServiceBase
{
public ServiceHost Service1Host = null;
public ServiceHost Service2Host = null;
public ServiceHost Service3Host = null;
public Service()
{
InitializeComponent();
}
protected override void OnStart(string[] args)
{
Uri Service1_baseAddress = new Uri("http://localhost:9999/Service1");
Uri Service2_baseAddress = new Uri("http://localhost:9999/Service2");
Uri Service3_baseAddress = new Uri("http://localhost:9999/Service3");
if (Service1Host != null)
{
Service1Host.Close();
}
Service1Host = new ServiceHost(typeof(Service1), Service1_baseAddress);
Service1Host.Open();
if (Service2Host != null)
{
Service2Host.Close();
}
Service2Host = new ServiceHost(typeof(Service2), Service2_baseAddress);
Service2Host.Open();
if (Service3Host != null)
{
Service3Host.Close();
}
Service3Host = new ServiceHost(typeof(Service3), Service3_baseAddress);
Service3Host.Open();
}
protected override void OnStop()
{
if (Service1Host != null)
{
Service1Host.Close();
Service1Host= null;
}
if (Service2Host != null)
{
Service2Host.Close();
Service2Host = null;
}
if (Service3Host != null)
{
Service3Host.Close();
Service3Host = null;
}
}
}
我尝试过的就在这里。我从 app.config 中删除了服务端点配置，并在代码中完成了它。我将所有 dll 放在一个文件夹中，并在代码中加载这些 dll。为了获得服务和接口，我在 app.config 中添加参数，如下所示，这将提供服务名称和接口名称以从加载的程序集中检索。一切正常。但是我有一个小问题，我已经在下面解释了。
新建 App.config 文件
<appSettings>
<add key="Service1.dll" value="Service1"/>
<add key="IService1.dll" value="IService1"/>
<add key="Service2.dll" value="Service2"/>
<add key="IService2.dll" value="IService2"/>
<add key="Service3.dll" value="Service3"/>
<add key="IService3.dll" value="IService3"/>
</appSettings>
新的 Windows 主机代码
public partial class Service : ServiceBase
{
public ServiceHost ServiceHost = null;
public WinService()
{
InitializeComponent();
}
protected override void OnStart(string[] args)
{
string[] files = Directory.GetFiles(@"C:\Users\Desktop\WindowsHost\dlls", "*.dll");
for (int i = 0; i < files.Length; i++)
files[i] = Path.GetFileName(files[i]);
foreach (var dllName in files)
{
string filePath = @"C:\Users\Desktop\WindowsHost\dlls\" + dllName;
Assembly assembly = Assembly.LoadFrom(filePath);
string serviceName = ConfigurationManager.AppSettings[dllName];
string interfaceName = ConfigurationManager.AppSettings["I" + dllName];
Type serviceToHost = assembly.GetType(serviceName);
var instance = Activator.CreateInstance(serviceToHost);
Type contract = service.GetInterface(interfaceName, true);
string address = dllName.Remove(dllName.LastIndexOf("."));
Uri baseAddress = new Uri("http://localhost:9999/" + address);
if (ServiceHost != null)
{
ServiceHost.Close();
}
ServiceHost = new ServiceHost(instance, baseAddress);
ServiceEndpoint sEP = ServiceHost.AddServiceEndpoint(contract, new WebHttpBinding(), "");
WebHttpBehavior webHttpBeh = sEP.Behaviors.Find<WebHttpBehavior>();
if (webHttpBeh != null)
{
webHttpBeh.AutomaticFormatSelectionEnabled = true;
webHttpBeh.DefaultOutgoingResponseFormat = WebMessageFormat.Json;
webHttpBeh.HelpEnabled = true;
}
else
{
WebHttpBehavior newWebHttpBeh = new WebHttpBehavior();
newWebHttpBeh.AutomaticFormatSelectionEnabled = true;
newWebHttpBeh.DefaultOutgoingResponseFormat = WebMessageFormat.Json;
newWebHttpBeh.HelpEnabled = true;
sEP.Behaviors.Add(newWebHttpBeh);
}
ServiceHost.Open();
}
}
protected override void OnStop()
{
if (ServiceHost != null)
{
ServiceHost.Close();
ServiceHost = null;
}
}
}
我在这里所做的是创建加载的 dll 的实例并将其作为 Windows 服务托管。
ServiceHost = new ServiceHost(instance, baseAddress);
如果您的服务行为将 InstanceContextMode 设置为 single，则此方法可以正常工作。否则它会给出错误。
错误： “服务无法启动。System.InvalidOperationException：为了使用接受服务实例的 ServiceHost 构造函数之一，必须将服务的 InstanceContextMode 设置为 InstanceContextMode.Single。这可以通过 ServiceBehaviorAttribute 进行配置。否则，请考虑使用带有 Type 参数的 ServiceHost 构造函数。”
我尝试像这样修改代码
ServiceHost = new ServiceHost(typeof(serviceToHost), baseAddress);
但它不起作用。请帮忙。有没有其他方法可以实现这一点。
谢谢