/// <summary>
/// Registers an <see cref="IApplicationInstanceIdRenter"/> that provides an ID for this application instance.
/// Use the options to specify an implementation.
/// </summary>
public static IServiceCollection AddApplicationInstanceIdSource(this IServiceCollection services, Action <Options> sourceOptions)
{
var optionsObject = new Options(services);
// The source MUST be registered first, since extensions on the options may overwrite the registration
// The source itself MUST be singleton, to establish one value for the entire application
// Everything else should be transient, to allow any lifetime of the dependencies for renting and returning the ID
services.AddSingleton <IApplicationInstanceIdSource, DefaultApplicationInstanceIdSource>();
sourceOptions(optionsObject);
if (!services.Any(service => service.ServiceType == typeof(IApplicationInstanceIdRenter)))
{
throw new ArgumentException($"Use the options to specify an implementation.");
}
var exceptionHandlerFactory = optionsObject.ExceptionHandlerFactory;
services.AddTransient(CreateExceptionHandler);
return(services);
// Local function that returns a new IExceptionHandler instance
IExceptionHandler CreateExceptionHandler(IServiceProvider serviceProvider)
{
var handleExceptionAction = exceptionHandlerFactory?.Invoke(serviceProvider);
var exceptionHandler = new OptionalExceptionHandler(handleExceptionAction);
return(exceptionHandler);
}
}
public void HandleException(Object targetObject, FastMethod fastMethod, Exception ex, Object[] parameters)
{
Log.Error("Exception encountered: " + ex.Message, ex);
if (OptionalExceptionHandler != null)
{
OptionalExceptionHandler.Handle(
new EPDataFlowExceptionContext(
DataFlowName, OperatorName, OperatorNumber, OperatorPrettyPrint, ex));
}
}
public void RentId_WithOnePriorInvocation_ShouldReturnId2()
{
var exceptionHandler = new OptionalExceptionHandler(null);
var connectionFactory = new ApplicationInstanceIdSourceDbConnectionFactory(this.Host.Services, _ => this.CreateDbConnection());
var transactionalExecutor = new SqlTransactionalExecutor(connectionFactory);
var otherSource = new StandardSqlApplicationInstanceIdRenter(this.Host.Services, databaseName: null);
otherSource.RentId();
var id = this.Renter.RentId();
Assert.Equal(2, id);
}
