// subscribes on server and receives a message
public async Task SendMessageToClient()
{
var pipeName = Guid.NewGuid().ToString();
var clientConnectedEvent = new ManualResetEventSlim();
var @event = new ManualResetEventSlim();
int recvCount = 0;
Task Handler(MyMessage x)
{
if (++recvCount == 10)
{
@event.Set();
}
return(Task.CompletedTask);
}
// creating remote hub
var t = Task.Run(async() =>
{
var hub = new MetaPubSub();
hub.StartServer(pipeName);
// wait for the subscriber
clientConnectedEvent.Wait(5000);
// publishing a message at the remote hub
for (int i = 0; i < 10; i++)
{
await hub.Publish(new MyMessage());
}
});
// local hub creation
var hub = new MetaPubSub();
await hub.ConnectToServer(pipeName);
await hub.SubscribeOnServer <MyMessage>(Handler);
// delay allowing the server to process the subscription request
await Task.Delay(100);
clientConnectedEvent.Set();
@event.Wait(5000);
// unsubscribing
await hub.Unsubscribe <MyMessage>(Handler);
Assert.IsTrue(@event.IsSet && recvCount == 10);
}
static async void RunClient()
{
try
{
// local hub creation
hub = new MetaPubSub();
// connecting the remote server
await hub.ConnectToServer("Meta");
// subscribing
await hub.SubscribeOnServer <PingCommand>(OnPingCommand);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
public async Task NoSubscribersException()
{
var pipeName = Guid.NewGuid().ToString();
var clientConnectedEvent = new ManualResetEventSlim();
var @event = new ManualResetEventSlim();
// creating remote hub
var t = Task.Run(async() =>
{
var hub = new MetaPubSub();
hub.StartServer(pipeName);
// wait for the subscriber
clientConnectedEvent.Wait(5000);
try
{
// publishing a message at the remote hub
await hub.Publish(new MyMessage()
{
DeliverAtLeastOnce = true
});
}
catch (NoSubscribersException)
{
@event.Set();
}
});
// local hub creation
var hub = new MetaPubSub();
await hub.ConnectToServer(pipeName);
// delay allowing the server process the connection
await Task.Delay(100);
clientConnectedEvent.Set();
@event.Wait(5000);
Assert.IsTrue(@event.IsSet);
}
async Task BasicExample()
{
int count = 0;
Task Handler(MyMessage x)
{
count++;
return(Task.CompletedTask);
}
// Creating the server hub.
// The server and the client hubs should be created in separate processes,
// this example is for demo only.
var serverHub = new MetaPubSub();
// Starting the hub as a server named 'Meta'.
serverHub.StartServer("Meta");
// Client hub creation. There are can be several hubs connected to the same server.
var clientHub = new MetaPubSub();
// Connecting to the remote server.
await clientHub.ConnectToServer("Meta");
// Subscribing to MyMessage on the server and locally at the same time.
await clientHub.SubscribeOnServer <MyMessage>(Handler);
// The server publishes a message.
await serverHub.Publish(new MyMessage());
// Client hub publishes a message and it will be received locally without being sent to the server.
await clientHub.Publish(new MyMessage());
// Client hub sends a message to the server where it will be published and sent back.
await clientHub.PublishOnServer(new MyMessage());
// All three messages should be received.
Debug.Assert(count == 3);
// Unsubscribing both on the server-side and locally.
await clientHub.Unsubscribe <MyMessage>(Handler);
}