/// <summary>
/// Runs a lambda worker
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="input"></param>
/// <param name="lambdaContext"></param>
/// <param name="configure"></param>
/// <returns></returns>
public static async Task Handle <T>(Stream input, ILambdaContext lambdaContext, Action <FimsAwsServiceBuilder> configure = null) where T : class, IWorker
{
IFimsAwsWorkerService service = null;
try
{
// build worker service
var serviceBuilder =
FimsAwsServiceBuilder.Create()
.WithDynamoDbRepository()
.WithS3FileStorage()
.With(lambdaContext);
configure?.Invoke(serviceBuilder);
service = serviceBuilder.BuildWorkerSevice <T>();
// read input as text and deserialize it
var jobAssignment = await service.ResourceSerializer.Deserialize <JobAssignment>(await new StreamReader(input).ReadToEndAsync());
// run worker
await service.Worker.Execute(jobAssignment);
}
finally
{
service?.Dispose();
}
}
public static FimsAwsServiceBuilder AddAwsMediaInfo(this FimsAwsServiceBuilder serviceBuilder)
{
return(serviceBuilder.With(services => services.AddMediaInfo <S3MediaInfoAccessibleLocationProvider, LambdaProcessLocator>()));
}
/// <summary>
/// Handles an API Gateway proxy request
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="lambdaContext"></param>
/// <param name="request"></param>
/// <param name="configure"></param>
/// <returns></returns>
public static async Task <APIGatewayProxyResponse> Handle <T>(APIGatewayProxyRequest request,
ILambdaContext lambdaContext,
Action <FimsAwsServiceBuilder> configure = null)
where T : IResourceHandlerRegistration, new()
{
IFimsAwsResourceApi service = null;
try
{
Console.WriteLine("Building FIMS service...");
// build service
var serviceBuilder = FimsAwsServiceBuilder.Create(opts => opts.AddProvider(new StageVariableProvider(request)))
.WithDynamoDbRepository()
.WithS3FileStorage()
.With(lambdaContext);
configure?.Invoke(serviceBuilder);
service = serviceBuilder.BuildResourceApi <ApiGatewayProxyLambdaRequest, T>();
}
catch (Exception exception)
{
// log error
var message = $"An error occurred running API Gateway proxy lambda. Error: {exception}";
if (service?.Logger != null)
{
service.Logger.Error(message);
}
else
{
Console.WriteLine(message);
}
// return unexpected 500
return(new APIGatewayProxyResponse
{
StatusCode = 500,
Body = "An unexpected error occurred building the service."
});
}
try
{
service.Logger.Info("Service built successfully. Starting request handling...");
// handle request
return(await service.RequestHandler.HandleRequest(new ApiGatewayProxyLambdaRequest(request)) is IApiGatewayProxyLambdaResponse response
? response.AsAwsApiGatewayProxyResponse()
: new APIGatewayProxyResponse
{
StatusCode = 500,
Body = "An unexpected error occurred. Internal configuration for API Gateway Proxy requests invalid."
});
}
catch (Exception exception)
{
// log error
service.Logger.Error($"An error occurred running API Gateway proxy lambda. Error: {exception}");
// return unexpected 500
return(new APIGatewayProxyResponse
{
StatusCode = 500,
Body = "An unexpected error occurred processing the request."
});
}
finally
{
service.Dispose();
}
}
