我正在使用F#邮箱处理器来同步数据交换,所以有一些操作和标志(发送和最终确定)被设置为真,但有时我需要重置然后,所以我使用api来做到这一点,所以我的api有一个特殊的命令,我叫系统清除这个操作设置一些系统标志回到假,但问题是,它不火。
作为一个api引擎,我使用的是Nancy(但我不认为这是问题的根源),所以重置系统标志的模块styatuis会像。
let purgeHandler =
Func<obj, Response>
(fun _ ->
try
HandshakeProcessor.Post(HandshakeService.Purge)
let jsonBytes = System.Text.Encoding.UTF8.GetBytes(""" {} """)
new Response
(ContentType = "application/json",
StatusCode = HttpStatusCode.OK,
Contents = fun s -> s.WriteAsync(jsonBytes, 0, jsonBytes.Length) |> Async.AwaitTask |> Async.RunSynchronously)
with
ex ->
let jsonBytes = System.Text.Encoding.UTF8.GetBytes(sprintf """ { "result": "false", "error": "%s" } """ ex.Message)
new Response
(ContentType = "application/json",
StatusCode = HttpStatusCode.InternalServerError,
Contents = fun s -> s.WriteAsync(jsonBytes, 0, jsonBytes.Length) |> Async.AwaitTask |> Async.RunSynchronously))
this.Put("Purge", purgeHandler)
很简单,只要我收到请求,我就会向邮箱发送清除命令,将标志设置为假。
所以我的邮箱看起来是这样的。
type HandshakeService =
| Finalized of (bool * bool)
| Purge
| Get of AsyncReplyChannel<HandshakePools>
let HandshakeProcessor : MailboxProcessor<HandshakeService> =
let handshake = HandshakePools()
MailboxProcessor.Start(fun inbox ->
let rec registerMessagePoint (responseType : ResponseType, message : DatabaseMessage) =
async{
let! msg = inbox.Receive()
match msg with
| Finalized (send, finalized) ->
handshake.Finalized <- finalized
handshake.Send <- send
| Purge ->
handshake.Send <- false
handshake.Finalized <- false
return! registerMessagePoint(responseType, message)
| Get replyChannel ->
handshake |> replyChannel.Reply
return! registerMessagePoint (responseType, message)
}
registerMessagePoint(ResponseType.Unknown, DatabaseMessage (0us, 0us, String.Empty)))
另外,当我在FUNC里面使用get flag状态时,比如说:
let pools = HandshakeProcessor.PostAndReply((fun reply -> HandshakeService.Get reply), timeout = 10000)
printfn "\n\n\n\n FINALIZED %b \n\n\n\n" pools.Finalized
我收到了超时异常。
另外,如果我在FUNC之前移动Post,它就会启动,但只在模块初始化时启动一次,然后当我再次调用这个方法时,它就不会出现bugde,比如。
let purgeHandler (handshakePool : HandshakePools) =
HandshakeProcessor.Post(HandshakeService.Purge)
Func<obj, Response>
所以问题是当我启动API方法时,清除帖子被跳过了。它不进入邮箱的清除方法和标志保持不变,我已经把断点在邮箱的清除部分。有人知道如何解决这个问题吗?
似乎没有简单的方法可以做到这一点,我所找到的都是SignalR与nancyFx在这种情况下的用法。所以从邮箱处理器辞职,创建了mediator。
调解器。
type HttpCommunicationMediator private () =
static member val private _instance = lazy HttpCommunicationMediator()
static member Instance = HttpCommunicationMediator._instance.Value
member val private purgeSettings = Event<unit>()
[<CLIEvent>]
member this.PurgeSetting = this.purgeSettings.Publish
member this.InvokePurgeSetting = this.purgeSettings.Trigger
当有API请求时调用
HttpCommunicationMediator.Instance.InvokePurgeSetting()
执行事件(放在可以注册的地方)。
HttpCommunicationMediator.Instance.PurgeSetting.AddHandler (fun _ _-> (* resets flags *))
虽然不是很完美,但还是能用的。