private async Task BackendDiscoveryHandler()
{
while (this.IsRunning)
{
try
{
var endpoints = await this.BackendDiscoverer.DiscoverAll();
foreach (var endpoint in endpoints)
{
var endpointId = BitConverter.ToString(endpoint.Encode());
var registeredEndpoint = new RegisteredBackend(endpoint, this);
if (this.backendEndpoints.TryAdd(endpointId, registeredEndpoint))
{
registeredEndpoint.Connect();
Console.WriteLine($"Backend registered [ {endpointId} ] ");
this.backendEndpointIds.Enqueue(endpointId);
}
else
{
this.backendEndpoints[endpointId].Heartbeat();
}
}
foreach (var endpointId in this.backendEndpoints.Keys)
{
if (!endpoints.Any(endpoint => BitConverter.ToString(endpoint.Encode()) == endpointId))
{
if (this.backendEndpoints.TryRemove(endpointId, out RegisteredBackend expiredBackend))
{
Console.WriteLine($"Backend {endpointId} expired");
expiredBackend.Close();
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message + ": " + ex.StackTrace);
}
await Task.Delay(5000);
}
}
private async Task BackendDiscoveryHandler()
{
while (this.IsRunning)
{
try
{
foreach (var backendDiscoverer in this.BackendDiscoverers)
{
var backendEndpointIds = this.backendEndpointIds.GetOrAdd(backendDiscoverer.Name, new ConcurrentQueue <string>());
var endpoints = await backendDiscoverer.Discoverer.DiscoverAll();
foreach (var endpoint in endpoints)
{
var endpointId = BitConverter.ToString(endpoint.Encode());
var registeredEndpoint = new RegisteredBackend(backendDiscoverer.Name, endpoint, this);
if (this.backendEndpoints.TryAdd(endpointId, registeredEndpoint))
{
registeredEndpoint.Connect();
this.OnDiagnosticMessage($"Backend registered [ {backendDiscoverer.Name}/{endpointId} ] ");
backendEndpointIds.Enqueue(endpointId);
}
else
{
this.backendEndpoints[endpointId].Heartbeat();
}
}
foreach (var endpointId in backendEndpointIds)
{
if (!endpoints.Any(endpoint => BitConverter.ToString(endpoint.Encode()) == endpointId))
{
if (this.backendEndpoints.TryRemove(endpointId, out RegisteredBackend expiredBackend))
{
this.OnDiagnosticMessage($"Backend {backendDiscoverer.Name}/{endpointId} expired");
expiredBackend.Close();
if (this.backendEndpointIds.TryRemove(backendDiscoverer.Name, out var oldEndpoints))
{
this.backendEndpointIds.GetOrAdd(backendDiscoverer.Name, new ConcurrentQueue <string>(oldEndpoints.Where(e => e != endpointId)));
}
}
}
}
}
foreach (var backendDiscoverer in this.BackendDiscoverers)
{
this.OnDiagnosticMessage($"Backend: {backendDiscoverer.Name}");
var backendEndpointIds = this.backendEndpointIds.GetOrAdd(backendDiscoverer.Name, new ConcurrentQueue <string>());
foreach (var eid in backendEndpointIds)
{
this.OnDiagnosticMessage($" {eid}");
}
}
}
catch (Exception ex)
{
this.OnDiagnosticMessage(ex.Message + ": " + ex.StackTrace);
}
await Task.Delay(5000);
}
}
