[英]server to client message using async in signalr
currently i'm using this code to send to each client a slightly different message. 目前,我正在使用此代码向每个客户端发送略有不同的消息。 When there are 100+ clients, this same code without task is blocking my timer loop, and i suspect it to also block all web requests. 当有100多个客户端时,没有任务的同一代码将阻止我的计时器循环,我怀疑它也将阻止所有Web请求。
ConcurrentDictionary Sessions;
// ...
var context = GlobalHost.ConnectionManager.GetHubContext<TiHub>();
foreach(var kp in Sessions)
{
var client = context.Clients.Client(kp.Key);
if (client != null)
{
client.changed(new Data{ data=somevalue(kp.Value) });
}
}
Async version 异步版本
var context = GlobalHost.ConnectionManager.GetHubContext<TiHub>();
return Task.Run(() =>
{
Parallel.ForEach(Sessions, kp =>
{
var client = context.Clients.Client(kp.Key);
if (client != null)
{
client.changed(new Data{ data=somevalue(kp.Value) });
}
});
});
I would like a task or async version of "changed". 我想要“更改”的任务或异步版本。 Something like: 就像是:
client.changedAsync(new Data{ data=somevalue(kp.Value) });
Is this supported in SignalR ? SignalR是否支持此功能?
Is client.changed
I/O bound or CPU bound? 是client.changed
I / O绑定还是CPU绑定?
I suppose it's I/O bound and you'll benefit from async-await
. 我想这是I / O绑定的,您将从async-await
受益。
Instead of the Parallel.ForEach
you might try something like this: 您可以尝试使用以下方法来代替Parallel.ForEach
:
var context = GlobalHost.ConnectionManager.GetHubContext<TiHub>();
var tasks = (from kp in Sessions
let client = context.Clients.Client(kp.Key)
where client != null
select Task.Run(() =>
{
client.changed(new Data{ data = somevaluekp.Value);
})).ToArray();
await Task.WhenAll(tasks);
But you should try to use natural async-await
APIs instead of the artificial Task.Run`. 但是,您应该尝试使用自然的async-await
API,而不要使用人工的Task.Run`。
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