public async Task <IActionResult> RegisterUser([FromBody] UserInfo userInfo)
{
HttpResponseMessage response;
PolicyDefinitions polly = new PolicyDefinitions();
var sqlBreakerPolicy = polly.sqlCircuitBreakerPolicy();
try
{
if (ModelState.IsValid)
{
//try
//{
// await sqlBreakerPolicy.ExecuteAsync(async () =>
// {
_db.UserInfo.Add(userInfo);
await _db.SaveChangesAsync();
// });
//}
//catch (Exception ex)
//{
// _logger.LogError(ex.ToString());
// return BadRequest(ex.ToString());
//}
}
try
{
response = await _notificationClient.SendNotification(userInfo.EmailAddress);
}
catch (Exception ex)
{
_logger.LogError(ex.ToString());
return(BadRequest(ex.ToString()));
}
if (response.IsSuccessStatusCode)
{
string confirmation = await response.Content.ReadAsStringAsync();
if (confirmation.Contains("http://notification"))
{
return(BadRequest("Docker Service is down"));
}
return(Ok(confirmation));
}
}
catch (Exception ex)
{
if (ex.ToString().Contains("The circuit is now open"))
{
//Return default value on exception.
_logger.LogError(ex.ToString());
return(BadRequest("Circuit Breaker Policy Invoke to Open State."));
}
else if (ex.ToString().Contains("Polly.Bulkhead.BulkheadRejectedException"))
{
_logger.LogError(ex.ToString());
return(BadRequest("Bulkhead Isolation Policy Invoked."));
}
else
{
_logger.LogError(ex.ToString());
return(BadRequest(ex.ToString()));
}
}
_logger.LogError("Unknown Exception Occurred.");
return(BadRequest("Unknown Exception Occurred."));
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.Configure <IISOptions>(options =>
{
options.AutomaticAuthentication = false;
});
//Register Repository BL service
services.AddScoped <IUserBL, UserBL>();
//Add Entity Framework
services.AddDbContext <GabDbContext>(options =>
{
options.UseSqlServer(Configuration.GetConnectionString("RegistrationDB"),
sqlServerOptionsAction: sqlOptions =>
{
sqlOptions.EnableRetryOnFailure(
maxRetryCount: 3,
maxRetryDelay: TimeSpan.FromSeconds(30),
errorNumbersToAdd: null);
});
});
// Add Cors
services.AddCors(o => o.AddPolicy("CorsPolicy", builder =>
{
builder.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader();
}));
//Add Swagger
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new Info {
Title = "Registration API", Version = "v1"
});
});
//Define Polly Policies inline right now - Refactor after POC to put into Policy Registry Class Library. Create methods where settings such as Timeout, Exponential Retry & Circuit Breaker Sync and Advanced Sync settings can be configurable.
PolicyDefinitions policyHelper = new PolicyDefinitions();
var registry = services.AddPolicyRegistry();
registry.Add("timeoutPolicy", policyHelper.timeOutPolicy(30));
registry.Add("fallbackPolicy", policyHelper.fallBackPolicy("Circuit Breaker Invoked"));
registry.Add("retryPolicy", policyHelper.waitAndRetry());
registry.Add("bulkheadPolicy", policyHelper.bulkHeadIsolation(80, 2));
registry.Add("circuitBreakerPolicy", policyHelper.circuitBreakerPolicy(3, 15));
//Typed Singleton HttpClient Handler and Apply Polly Policies - Switched to Typed Client for the POC
services.AddHttpClient <INotificationClient, NotificationClient>()
.AddPolicyHandlerFromRegistry("bulkheadPolicy")
.AddPolicyHandlerFromRegistry("timeoutPolicy")
.AddPolicyHandlerFromRegistry("fallbackPolicy")
.AddPolicyHandlerFromRegistry("retryPolicy")
.AddPolicyHandlerFromRegistry("circuitBreakerPolicy");
//Configure Health Check API - Heartbeat Probe on service dependencies
services.AddHealthChecks()
.AddApplicationInsightsPublisher()
.AddDbContextCheck <GabDbContext>("SQL DB")
.AddUrlGroup(new Uri("http://notification"), "NOTIFICATION API");
services.AddApplicationInsightsTelemetry();
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
}