WCF对等，是否有结点在那里？

问题描述

我使用WCF的.NET 3.5实现点对点组网应用。要解决我使用PNRP对等节点。

IGlobalStoreServiceContract是我的合同，如下图所示，

  [的ServiceContract（命名空间=HTTP：//GlobalStoreEventDriven.API​​，CallbackContract = typeof运算（IGlobalStoreServiceContract））]
内部接口IGlobalStoreServiceContract
{
    [OperationContract的（IsOneWay =真）
    无效NotifyGlobalStoreDataInserted（字符串globalGroup，日期时间maxDateTime）;

    [OperationContract的（IsOneWay =真）
    无效RegisterNode（）;

    [OperationContract的（IsOneWay =真）
    无效SynchronizeMemberList（GUID ClientID的）;
}
 

我使用了一些code这样的加盟每个节点的对等网络。

  DuplexChannelFactory＆LT; IGlobalStoreChannel＆GT;的ChannelFactory =新DuplexChannelFactory＆LT; IGlobalStoreChannel＆GT;（例如，GlobalStoreAPIEndPoint）;
IGlobalStoreChannel globalStoreChannel = channelFactory.CreateChannel（）;

globalStoreChannel.Open（）;
 

我的问题，只要我打开了通道我如何能最好地判断其它对等节点在网络上是？

比如我可以打电话给在我的合同RegisterNode的方法之一，而网络中的每个节点可以使用回调来调用SynchronizeMemberList。然后我会知道的其它节点是否在那里。

与麻烦的是它是所有异步的。如果我打电话RegisterNode，没有人回答，它并不真正意味着没有一个人，它可能只是意味着我没有等到足够长的时间。

你怎么算？有什么建议？

解决方案

请参阅同行点对点编程与WCF和.NET Framework 3.5：对等名称通过阿米特Bahree和克里斯·佩里斯：

  PeerName MyPeer的=新PeerName（MySecurePeer，PeerNameType.Secured）;
PeerNameResolver解析器=新PeerNameResolver（）;

PeerNameRecordCollection结果= resolver.Resolve（MyPeer的）;

Console.WriteLine（{0}同行实测值：，results.Count.ToString（））;
INT I = 1;

的foreach（PeerNameRecord同行中的结果）
{
    Console.WriteLine（{0}同伴：{1}，我++，peer.PeerName.ToString（））;
    的foreach（IPEndPoint知识产权peer.EndPointCollection）
    {
        Console.WriteLine（\ t端点：{0}，ip.ToString（））;
    }
}
 

所以，我想你应该看看<$c$c>PeerNameResolver.Resolve方法：

I am using WCF in .NET 3.5 to implement a peer to peer networking application. To resolve peer nodes I am using PNRP.

IGlobalStoreServiceContract is my contract as shown below,

[ServiceContract(Namespace = "http://GlobalStoreEventDriven.API", CallbackContract = typeof(IGlobalStoreServiceContract))]
internal interface IGlobalStoreServiceContract
{
    [OperationContract(IsOneWay = true)]
    void NotifyGlobalStoreDataInserted(string globalGroup, DateTime maxDateTime);

    [OperationContract(IsOneWay = true)]   
    void RegisterNode();

    [OperationContract(IsOneWay = true)]
    void SynchronizeMemberList(Guid clientId);
}

I am using some code like this to join each node to the peer to peer network.

DuplexChannelFactory<IGlobalStoreChannel> channelFactory = new DuplexChannelFactory<IGlobalStoreChannel>(instance, "GlobalStoreAPIEndPoint");
IGlobalStoreChannel globalStoreChannel = channelFactory.CreateChannel();

globalStoreChannel.Open();

My question is as soon as I have opened the channel how can I best tell if other peer nodes are on the network?

For instance I could call one of the methods in my contract RegisterNode, and each node in the network could use a callback to call SynchronizeMemberList. I would then know whether other nodes were there.

The trouble with that is it is all asynchronous. If I call RegisterNode and no one replies, it doesn't really mean no one is there, it could just mean that I didn't wait long enough.

What do you reckon? Any suggestions?

解决方案

See Peer-to-Peer Programming with WCF and .NET Framework 3.5: Peer Name by Amit Bahree and Chris Peiris:

PeerName myPeer = new PeerName("MySecurePeer", PeerNameType.Secured);
PeerNameResolver resolver = new PeerNameResolver();

PeerNameRecordCollection results = resolver.Resolve(myPeer);

Console.WriteLine("{0} Peers Found:", results.Count.ToString());
int i = 1;

foreach (PeerNameRecord peer in results)
{
    Console.WriteLine("{0} Peer:{1}", i++, peer.PeerName.ToString());
    foreach (IPEndPoint ip in peer.EndPointCollection)
    {
        Console.WriteLine("\t Endpoint: {0}", ip.ToString());
    }
}

So, I guess you should check out PeerNameResolver.Resolve Method:

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