为 WCF 服务加载 COM 对象的启动代码 [英] Startup Code for Loading COM Object for WCF Service

问题描述

我目前有一个 WCF 服务，它使用 COM DLL 作为其服务.COM 对象仅加载一次并通过单例保存.问题是第一次运行需要大约 1 分钟来加载 COM 对象.WCF 服务通过 Windows 服务托管.我想知道如何通过 Windows 服务的启动加载 COM 对象单例.

I am currently have a WCF service that uses a COM DLL for its service. The COM object is only loaded once and saved via a singleton. The problem is the first run takes about 1 minute to load the COM Object. The WCF service is hosted via a Windows Service. I am wondering how can I load the COM Object singleton via the startup of the Windows Service.

protected override void OnStart(string[] args)
{
    if (host != null)
    {
        host.Close();
    }

    Type serviceType = typeof(MyService);
    host = new ServiceHost(serviceType);
    host.Open();

    objectConn.getInstance()
}

当我尝试在Windows服务启动的OnStart中添加Singleton的负载时，总是失败.我想问一下这是否是为 objectConn 实例添加启动例程的正确方法.我试图将单例加载放在 MyService 构造函数中，但它仅在第一次调用我调用的 Web 服务操作/方法时被调用，这使得第一次服务调用变得笨拙.

When I try to add the load of the Singleton in the OnStart of the Windows Service startup, it always fails. I would like to ask if this i the proper way to add startup routine for the objectConn instance. I tried to place the singleton loading in the MyService construtor but it is only called with the first call to the web service operation/method that I invoke which makes the first service call awkward.

我阅读了 DependencyInjection，但我认为添加的行为不适用，因为我只想加载一次 COM 对象源.

I read about DependencyInjection but I think the added behavior is not applicable since I just want to load the COM object source once.

推荐答案

你可能可以这样做 - 但我建议在

You can probably do this - but I would recommend doing it before the

host.Open()

打电话.此调用会启动整个 WCF 运行时和所有内容，如果可能的话，我更愿意在此之前完成所有初始化任务.

call. This call spins up the entire WCF runtime and everything, and I would prefer to do all initialization tasks before that, if ever possible.

马克

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