// Inspiration coming from:
// https://docs.microsoft.com/en-us/azure/architecture/patterns/circuit-breaker#example
public static void Main(string[] args)
{
var serverAddress = "http://localhost:5001";
var client = new RestClient(serverAddress);
var request = new RestRequest("circuit-breaker", Method.GET);
var breaker = new CircuitBreaker();
var desiredCallsToRemoteServer = 30;
var actualCallsToRemoteServer = 0;
for (int i = 1; i <= desiredCallsToRemoteServer; i++)
{
try
{
Console.WriteLine("\nAttempting call #{0} to server.", i);
breaker.ExecuteAction(() =>
{
// Operation protected by the circuit breaker.
actualCallsToRemoteServer++;
Console.WriteLine("\nExecuting call #{0} to server", actualCallsToRemoteServer);
IRestResponse response = client.Execute(request);
Console.WriteLine("Response was: {0}. Status Code was {1}", response.Content, response.StatusCode);
if (response.StatusCode == System.Net.HttpStatusCode.BadRequest)
{
throw new BadRequestException(string.Format("Received a bad request back, triping Circuit Breaker: {0}",
response.StatusCode));
}
});
}
catch (CircuitBreakerOpenException ex)
{
// Perform some different action when the breaker is open.
// Last exception details are in the inner exception.
Console.WriteLine("\n\n{0}", ex);
}
catch (Exception ex)
{
Console.WriteLine("\n\nCatch All Exeption: \n{0}", ex);
}
Thread.Sleep(5000);
}
Console.WriteLine("==============================================================");
Console.WriteLine("\nDesired calls to remote: {0}", desiredCallsToRemoteServer);
Console.WriteLine("Calls allowed by Circuit Breaker: {0}", actualCallsToRemoteServer);
}
