public Task <long> GenerateMessageId(string key)
{
// Slave
if (!this.IsElectedMaster())
{
var electedMasterPeer = this.GetElectedMaster();
var queryString = "?" + PeerToPeerHelper.RequestKeys.GenerateMessageId + "=" + HttpUtility.UrlEncode(key);
var messageIdGeneratorUrl = electedMasterPeer + MessageReceiverHandler.HandlerName + queryString;
return(TaskAsyncHelper.Success <HttpWebResponse, long>(HttpHelper.GetAsync(messageIdGeneratorUrl, req => { }), t =>
{
var messageId = long.Parse(t.Result.GetResponseHeader(PeerToPeerHelper.HeaderPrefix + PeerToPeerHelper.RequestKeys.GenerateMessageId));
_messageIds[key] = messageId;
return messageId;
}));
}
// Master
if (!_messageIds.ContainsKey(key))
{
_messageIds[key] = 1;
}
return(TaskAsyncHelper.FromResult <long>(_messageIds[key]++));
}