public async Task <HttpResponseMessage> HttpStart(
[HttpTrigger(AuthorizationLevel.Function, "post")] HttpRequestMessage req,
[OrchestrationClient] DurableOrchestrationClient starter,
ILogger log)
{
TransformRequest request = await req.Content.ReadAsAsync <TransformRequest>();
string instanceId = await starter.StartNewAsync("TransformFromStorage_Orchestrator", request);
log.LogInformation($"Started transform orchestration with ID = '{instanceId}'. Request = '{ JsonConvert.SerializeObject(request)}' ");
return(starter.CreateCheckStatusResponse(req, instanceId));
}
public async Task <TransformResponse> TransformAsync(TransformRequest request, ILogger log)
{
var response = new TransformResponse()
{
OutputContainer = request.OutputContainer
};
var blobServiceClient = new BlobServiceClient(connectionString);
BlobContainerClient inputContainerClient = blobServiceClient.GetBlobContainerClient(request.InputContainer);
if (!await inputContainerClient.ExistsAsync())
{
log.LogError($"input container: {request.InputContainer} not exist.");
throw new ArgumentException($"Container: {request.InputContainer} not exist");
}
BlobClient inputBlobClient = inputContainerClient.GetBlobClient(request.InputFileName);
if (!await inputBlobClient.ExistsAsync())
{
log.LogError($"input blob: {request.InputFileName} not exist.");
throw new ArgumentException($"Container: {request.InputFileName} not exist");
}
BlobContainerClient outputContainerClient = blobServiceClient.GetBlobContainerClient(request.OutputContainer);
await outputContainerClient.CreateIfNotExistsAsync();
BlobClient outputBlobClient = outputContainerClient.GetBlobClient(request.InputFileName);
if (await outputBlobClient.DeleteIfExistsAsync())
{
log.LogInformation($"Delete existed {outputBlobClient.Name}.");
}
var downloadContent = await inputBlobClient.DownloadAsync();
log.LogInformation($"Start to upload to blob: {outputBlobClient.Name}");
await outputBlobClient.UploadAsync(downloadContent.Value.Content);
log.LogInformation($"Upload to blob completed: {outputBlobClient.Name}");
return(response);
}
public async Task <TransformResponse> RunOrchestrator(
[OrchestrationTrigger] DurableOrchestrationContext context,
ILogger log)
{
TransformRequest request = context.GetInput <TransformRequest>();
log.LogInformation($"Start to transform. UTC: { DateTime.UtcNow.ToLongTimeString() }");
try
{
return(await context.CallActivityAsync <TransformResponse>("TransformFromStorage", request));
}
catch (Exception ex)
{
log.LogError($"Transform failed with error: {ex.Message} \r\n {ex.StackTrace}");
throw;
}
finally
{
log.LogInformation($"Transform completed. UTC: { DateTime.UtcNow.ToLongTimeString() }");
}
}
public async Task <TransformResponse> Transform([ActivityTrigger] TransformRequest request, ILogger log)
{
return(await transformer.TransformAsync(request, log));
}
