public UserAccountsClient(
ILoggerFactory loggerFactory,
ServiceDiscoveryConfiguration configuration,
HttpClient httpClient,
IServiceRegistryClient discoveryClient)
: base(loggerFactory, configuration, httpClient, discoveryClient, "Product.Capability", "UserAccounts")
{
}
protected ServiceDiscoveryClient(
ILoggerFactory loggerFactory,
ServiceDiscoveryConfiguration configuration,
HttpClient httpClient,
IServiceRegistryClient registryClient,
string serviceName = null,
string serviceTag = null)
{
EnsureArg.IsNotNull(httpClient, nameof(httpClient)); // TYPED CLIENT > https://docs.microsoft.com/en-us/aspnet/core/fundamentals/http-requests?view=aspnetcore-2.2
EnsureArg.IsNotNull(loggerFactory, nameof(loggerFactory));
EnsureArg.IsNotNull(registryClient, nameof(registryClient));
configuration = configuration ?? new ServiceDiscoveryConfiguration();
this.Logger = loggerFactory.CreateLogger <ServiceDiscoveryClient>();
if (configuration.RouterEnabled && !configuration.RouterAddress.IsNullOrEmpty())
{
// server-side (router)
httpClient.BaseAddress = new Uri(new Uri(configuration.RouterAddress), configuration.RouterPath.Safe().TrimEnd('/') + "/"); // backslash mandatory https://stackoverflow.com/questions/23438416/why-is-httpclient-baseaddress-not-working
// following are used by router to forward to correct service instance
httpClient.DefaultRequestHeaders.Add(ServiceDiscoveryRouterHeaders.ServiceName, serviceName);
httpClient.DefaultRequestHeaders.Add(ServiceDiscoveryRouterHeaders.ServiceTag, serviceTag);
this.Logger.LogInformation($"{{LogKey:l}} router (service={{ServiceName}}, tag={serviceTag}, address={httpClient.BaseAddress})", LogKeys.ServiceDiscovery, serviceName);
}
else
{
// client-side
if (serviceName.IsNullOrEmpty() && serviceTag.IsNullOrEmpty())
{
throw new ArgumentNullException("serviceName and serviceTag arguments cannot both be null or empty");
}
var registration = registryClient.RegistrationsAsync(serviceName, serviceTag).Result?.FirstOrDefault();
if (registration != null)
{
httpClient.BaseAddress = new Uri($"{registration.Address}:{registration.Port}".TrimEnd(':'));
this.Logger.LogInformation($"{{LogKey:l}} client (service={{ServiceName}}, tag={serviceTag}, address={httpClient.BaseAddress})", LogKeys.ServiceDiscovery, serviceName);
}
else
{
this.Logger.LogWarning($"{{LogKey:l}} client (service={{ServiceName}}, tag={serviceTag}, address=not found in registry)", LogKeys.ServiceDiscovery, serviceName);
}
}
// TODO: get serviceregistration by name OR any of the tags
//else
//{
// throw new Exception("no active service registrations found");
//}
this.HttpClient = httpClient;
}
protected ServiceConfiguration(IServiceRegistryClient serviceRegistryClient)
{
if (serviceRegistryClient == null)
{
throw new OperationCanceledException("Service registry client cannot be null");
}
_serviceRegistryClient = serviceRegistryClient;
_initialRetryDelay = ConfigurationProvider.InitialRetryDelay;
_retryCount = ConfigurationProvider.RetryCount;
}
public ServiceDiscoveryHostedService(
ILogger <ServiceDiscoveryHostedService> logger,
ServiceDiscoveryConfiguration configuration,
IServiceRegistryClient registryClient,
IServer server,
ServiceDescriptor serviceDescriptor)
{
EnsureArg.IsNotNull(logger, nameof(logger));
EnsureArg.IsNotNull(configuration, nameof(configuration));
EnsureArg.IsNotNull(registryClient, nameof(registryClient));
EnsureArg.IsNotNull(server, nameof(server));
EnsureArg.IsNotNull(serviceDescriptor, nameof(serviceDescriptor));
this.logger = logger;
this.configuration = configuration;
this.registryClient = registryClient;
this.server = server;
this.serviceDescriptor = serviceDescriptor;
this.serviceAddress = this.configuration.ServiceAddresses?.FirstOrDefault(); // TODO: register all addresses (foreach)
}
public RouterContext(IServiceRegistryClient registryClient)
{
this.RegistryClient = registryClient;
}