public BargainsForCouplesApiClient(IOptions <BargainsForCouplesSettings> settings, HttpClient httpClient)
{
_HttpClient = httpClient;
_Settings = settings.Value;
//_Logger = logger; TODO Add log functionality
_BaseUrl = _Settings.BaseUrl;
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
// Register the Swagger generator, defining 1 or more Swagger documents
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo
{
Version = "v1",
Title = "CheapAwesome API",
Description = "Cheap Awesome travel",
TermsOfService = new Uri("https://example.com/terms"),
Contact = new OpenApiContact
{
Name = "Cheap Awesome Travel",
Email = "*****@*****.**",
Url = new Uri("http://cheapawesome.travel/"),
}
});
});
// Dependency Injection
services.AddTransient <IHotelAvailabilityService, HotelAvailabilityService>();
services.AddSingleton <ICacheService, MemoryCacheService>();
Random jitterer = new Random();
var retryPolicy = HttpPolicyExtensions
.HandleTransientHttpError()
.WaitAndRetryAsync(5,
retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)) // exponential back-off: 2, 4, 8 etc
+ TimeSpan.FromMilliseconds(jitterer.Next(0, 1000)) // plus some jitter: up to 1 second
);
var breakerPolicy = HttpPolicyExtensions
.HandleTransientHttpError()
.AdvancedCircuitBreakerAsync(
failureThreshold: 0.5,
samplingDuration: TimeSpan.FromSeconds(5),
minimumThroughput: 20,
durationOfBreak: TimeSpan.FromSeconds(30));
//TODO : Register all implementations of IHotelAvailabilitySupplier dynamically
services.AddHttpClient <IHotelAvailabilitySupplier, BargainsForCouplesHotelAvailabilityService>()
.AddPolicyHandler(retryPolicy)
.AddPolicyHandler(breakerPolicy);
var bargainsForCouplesSetting = new BargainsForCouplesSettings();
Configuration.GetSection(nameof(BargainsForCouplesSettings)).Bind(bargainsForCouplesSetting);
services.AddSingleton(bargainsForCouplesSetting);
var memoryCacheSettings = new MemoryCacheSettings();
Configuration.GetSection(nameof(MemoryCacheSettings)).Bind(memoryCacheSettings);
services.AddSingleton(memoryCacheSettings);
}
