public Task Handle(PlaceOrder message, IMessageHandlerContext context)
{
logger.Info($"Received PlaceOrder, OrderId = {message.OrderId}");
LogTrace(message);
// This is normally where some business logic would occur
// 25% of messages always fail with a missing parameter error - persistent
// all messages fail 10% of the time with a deadlock - transient
// all messages fail 10% of the time with a FraudDetectionUnavailableException - transient
var d = message.GetHashCode();
if (d > (int.MaxValue / 4) * 3)
{
throw SqlExceptionCreator.NewSqlException(137); // Must declare the scalar variable - PERSISTENT
}
else if (new Random(Guid.NewGuid().GetHashCode()).NextDouble() > 0.90)
{
throw SqlExceptionCreator.NewSqlException(1205); // deadlock - TRANSIENT
}
else if (new Random(Guid.NewGuid().GetHashCode()).NextDouble() > 0.80)
{
throw new FraudDetectionUnavailableException("Fraud detection system is down for a short time"); // SEMI TRANSIENT
}
var orderPlaced = new OrderPlaced
{
OrderId = message.OrderId
};
return(context.Publish(orderPlaced));
}
public LevyTransactionBatchStorageServiceFixture With_RepositoryThrowingSqlException(int number)
{
mockLevyTransactionRepository
.Setup(x => x.SaveLevyTransactions(It.IsAny <List <LevyTransactionModel> >(),
It.IsAny <CancellationToken>()))
.ThrowsAsync(SqlExceptionCreator.NewSqlException(number));
return(this);
}
public void MonitoringMiddleware_Returns_JsonDetail_And_404_On_Specific_SqlException()
{
int expectedHttpCode = 404;
Mock <IFrameworkTracer> frameworkTracerMock = new Mock <IFrameworkTracer>();
SqlException expectedException = SqlExceptionCreator.NewSqlException(60000);
_requestDelegateMock.Setup(rd => rd(It.IsAny <HttpContext>())).Throws(expectedException);
var httpResponseMock = GetHttpResponseMock();
var httpContextMock = GetHttpContextMock(responseMock: httpResponseMock);
var systemUnderTest = new MonitoringMiddleware(_requestDelegateMock.Object, frameworkTracerMock.Object);
systemUnderTest.InvokeAsync(httpContextMock.Object).GetAwaiter().GetResult();
httpResponseMock.VerifySet(t => t.StatusCode = expectedHttpCode);
}
public Task Handle(CancelOrder message, IMessageHandlerContext context)
{
logger.Info($"Received CancelOrder, OrderId = {message.OrderId}");
// This is normally where some business logic would occur
// SqlException is: Must declare the scalar variable - this will happen everytime
// but the policy related to thse messages is a Transient By Default
// and OrderNotFoundException are treated as persistent
// so these messages will be retried up to the limit
SqlExceptionCreator.NewSqlException(137);
var orderCancelled = new OrderCancelled
{
OrderId = message.OrderId
};
return(context.Publish(orderCancelled));
}
