public Task StartAsync(CancellationToken cancellationToken)
{
this.logger.LogInformation("{LogKey:l} hosted service started", LogKeys.ServiceDiscovery);
this.cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
// https://github.com/cecilphillip/aspnet-servicediscovery-patterns/blob/master/self_registration/src/SchoolAPI/Infrastructure/ConsulHostedService.cs
if (this.serviceAddress.IsNullOrEmpty())
{
var features = this.server.Features;
var addressFeature = features?.Get <IServerAddressesFeature>();
this.serviceAddress = addressFeature?.Addresses?.FirstOrDefault(); // TODO: register all addresses (foreach)
}
if (!this.serviceAddress.IsNullOrEmpty())
{
// Register this service (use ServiceDescriptor for more infos)
var uri = new Uri(this.serviceAddress);
var registrationId = $"{this.serviceDescriptor.Name}-{HashAlgorithm.ComputeMd5Hash(uri.ToString())}";
this.logger.LogInformation($"{{LogKey:l}} service registration (id={registrationId}, address={this.serviceAddress})", LogKeys.ServiceDiscovery);
var registration = new ServiceRegistration
{
Id = registrationId, // TODO: use resolved servicedescriptor for id/name (AppDomain.CurrentDomain.FriendlyName)
Name = this.serviceDescriptor.Name,
Address = $"{uri.Scheme}://{uri.Host}",
Port = uri.Port,
Tags = this.serviceDescriptor.Tags
};
//this.logger.LogInformation($"{LogEventIdentifiers.ServiceDiscovery} register (name={{RegistrationName}}, address={registration.FullAddress})", registration.Name);
this.registryClient.RegisterAsync(registration);
this.registrationIds.Add(registrationId);
this.registered = true;
}
else
{
this.logger.LogWarning("{LogKey:l} service registration failed, missing address", LogKeys.ServiceDiscovery);
}
return(Task.CompletedTask);
}
private string EnsureCorrelationId(HttpContext httpContext)
{
var isFound = httpContext.Request.Headers.TryGetValue(this.options.CorrelationHeader, out var id);
if (!isFound || StringValues.IsNullOrEmpty(id))
{
if (this.options.UseRandomCorrelationId)
{
//return Guid.NewGuid().ToString(); //.Replace("-", string.Empty);
return(IdGenerator.Instance.Next); //RandomGenerator.GenerateString(this.options.RandomCorrelationIdLength, true);
}
else if (this.options.UseHashAsCorrelationId)
{
return(HashAlgorithm.ComputeMd5Hash(httpContext.TraceIdentifier));
}
else
{
return(httpContext.TraceIdentifier);
}
}
return(id.ToString());
}
public static CommandRequestOptions UseAzureServiceBusQueue(
this CommandRequestOptions options,
string connectionString = null,
string name = "commandrequests",
TimeSpan?expiration = null,
int?retries = null)
{
options.Context.Services.AddSingleton <IQueue <CommandRequestWrapper> >(sp =>
new AzureServiceBusQueue <CommandRequestWrapper>(o => o
.Mediator(sp.GetRequiredService <IMediator>())
.Tracer(sp.GetService <ITracer>())
.LoggerFactory(sp.GetRequiredService <ILoggerFactory>())
.ConnectionString(connectionString.EmptyToNull() ?? options.Context.Configuration["naos:commands:azureServiceBusQueue:connectionString"])
.Serializer(new JsonNetSerializer(TypedJsonSerializerSettings.Create())) // needs type information in json to deserialize correctly (which is needed for mediator.send)
.QueueName($"{name}-{HashAlgorithm.ComputeMd5Hash(options.Context.Descriptor.Name)}")
.Expiration(expiration)
.Retries(retries)));
return(options);
}
public static CommandRequestOptions UseAzureBlobStorage(
this CommandRequestOptions options, string connectionString = null, string containerName = "commandrequests")
{
options.Context.Services.AddSingleton(sp => new CommandRequestStore(
new FileStorageLoggingDecorator(
sp.GetRequiredService <ILoggerFactory>(),
new AzureBlobFileStorage(o => o
.ConnectionString(connectionString.EmptyToNull() ?? options.Context.Configuration["naos:commands:azureBlobStorage:connectionString"])
.ContainerName($"{containerName}-{HashAlgorithm.ComputeMd5Hash(options.Context.Descriptor.Name)}")))));
return(options);
}