Wcf 我们可以作为Windows服务承载工作流服务吗？

我正在处理一个日志应用程序，它要求我拥有一个作为服务公开的工作流（工作流服务）。我们希望将其作为Windows服务宿主（不希望在IIS中作为.svc文件宿主工作流服务）。将其作为windows服务的另一个原因是能够通过命名管道与服务通信

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我们可以通过命名管道公开工作流服务而不在IIS中托管它吗

是的，这是可能的。您必须创建自己的服务。请参阅MSDN，特别是Windows服务中的主机部分。

是的，当然可以。至少，我已经在Workflow4候选版本中完成了同样多的工作

考虑一下

// a generic self-hosted workflow service hosting thingy. Actual
// implementation should contain more logging and thread safety, this
// is an abbreviated version ;)
public class WorkflowHost
{

    // NOTE: with Workflow, it helps to maintain a concept of
    // Workflow definition [the Activity or WorkflowService from
    // a designer] and a Workflow instance [what is running within
    // WorkflowInvoker, WorkflowApplication, WorkflowServiceHost].
    // a definition may be used to generate an instance. an instance
    // contains run-time state and cannot be recycled into a new
    // instance. therefore, to repeatedly re-host a WorkflowService
    // we need to maintain references to original definitions and
    // actual instances. ergo services and hosts maps
    // 
    // if you are special purpose and require support for one and 
    // only one service and endpoint\uri, then you may reduce this 
    // to a simple tuple of Uri, WorkflowService, WorkflowServiceHost

    // services represents a definition of hosted services
    private readonly Dictionary<Uri, WorkflowService> _services = 
        new Dictionary<Uri, WorkflowService> ();

    // hosts represents actual running instances of services
    private readonly Dictionary<Uri, WorkflowServiceHost> _hosts = 
        new Dictionary<Uri, WorkflowServiceHost> ();

    // constructor accepts a map of Uris (ie service endpoints) to
    // workflow service definitions
    public WorkflowHost (IDictionary<Uri, WorkflowService> services)
    {
        foreach (KeyValuePair<Uri, WorkflowService> servicePair in services)
        {
            _services.Add (servicePair.Key, servicePair.Value);
        }
    }

    // have your windows service invoke this to start hosting
    public void Start ()
    {
        if (_hosts.Count > 0)
        {
            Stop ();
        }

        foreach (KeyValuePair<Uri, WorkflowService> servicePair in _services)
        {
            WorkflowService service = servicePair.Value;
            Uri uri = servicePair.Key;
            WorkflowServiceHost host = new WorkflowServiceHost (service, uri);

            host.Open ();

            _hosts.Add (uri, host);
        }
    }

    // have your windows service invoke this to stop hosting
    public void Stop ()
    {
        if (_hosts.Count > 0)
        {
            foreach (KeyValuePair<Uri, WorkflowService> servicePair in 
                _services)
            {
                WorkflowService service = servicePair.Value;
                Uri uri = servicePair.Key;

                IDisposable host = _hosts[uri];
                host.Dispose ();
            }

            _hosts.Clear ();
        }
    }
}

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谢谢约翰尼的详细回复。我会试着看看它是否能带我去某个地方。我知道有一种方法可以将WCF公开为windows服务。我的具体问题与作为WCF公开并作为Windows服务托管的工作流有关。逻辑上的假设是，一旦您手头有了WCF（无论其类型如何），您就应该能够将其作为windows服务托管。我将尝试这种方法，以发现它符合我的要求。不用担心，但仔细看看。提供的解决方案==WindowsService+WF+WCF，这不是您所需要的吗？确认，在示例代码之间添加了更多上下文。这是如何通过WCF演示WindowsService托管的WorkflowServices的，是否更清楚？很好。你能把你的应用程序放在某个地方吗。那将是很大的帮助。谢谢你的回复。我有这个想法。我主要关心的是，如果我尝试使用Windows服务托管基于工作流的WCF服务，它是否会出错、中断、抛出异常。一旦我能做到这一点，我将分享我的经验。@arsayed嘿，我知道这是7年后的事了，但你能做到吗？

// windows service. personally i would abstract service behind
// an interface and inject it, but again, for brevity ;)
public partial class WorkflowWindowsService : ServiceBase
{
    WorkflowHost _host;

    public WorkflowWindowsService ()
    {
        InitializeComponent();

        Dictionary<Uri, WorkflowService> services = 
            new Dictionary<Uri, WorkflowService> ();

        // do your service loading ...

        // create host
        _host = new WorkflowHost (services);
    }

    protected override void OnStart(string[] args)
    {
        _host.Start ();
    }

    protected override void OnStop()
    {
        _host.Stop ();
    }
}

// converts a string value [either pure xaml or filename] to a
// WorkflowService definition
public WorkflowService ToWorkflowService (string value)
{
    WorkflowService service = null;

    // 1. assume value is Xaml
    string xaml = value;

    // 2. if value is file path,
    if (File.Exists (value))
    {
        // 2a. read contents to xaml
        xaml = File.ReadAllText (value);
    }

    // 3. build service
    using (StringReader xamlReader = new StringReader (xaml))
    {
        object untypedService = null;

        // NOTE: XamlServices, NOT ActivityXamlServices
        untypedService = XamlServices.Load (xamlReader);

        if (untypedService is WorkflowService)
        {
            service = (WorkflowService)(untypedService);
        }
        else
        {
            throw new ArgumentException (
                string.Format (
                "Unexpected error reading WorkflowService from " + 
                "value [{0}] and Xaml [{1}]. Xaml does not define a " + 
                "WorkflowService, but an instance of [{2}].", 
                value, 
                xaml, 
                untypedService.GetType ()));
        }
    }

    return service;
}