private static async Task <bool> InnerGetPdf(string workingFolder, DocumentStoreServiceClient client, List <FileToComposeData> files, string handle, DocumentHandle documentHandle, bool pdfExists)
{
var pdfData = client.OpenRead(documentHandle, DocumentFormats.Pdf);
var tempFile = Path.Combine(workingFolder, Guid.NewGuid() + ".pdf");
using (var downloaded = new FileStream(tempFile, FileMode.OpenOrCreate, FileAccess.Write))
{
var stream = await pdfData.OpenStream();
stream.CopyTo(downloaded);
}
files.Add(FileToComposeData.FromDownloadedPdf(tempFile, handle));
pdfExists = true;
return(pdfExists);
}
protected async override Task <ProcessResult> OnPolling(
Shared.Jobs.PollerJobParameters parameters,
string workingFolder)
{
var client = GetDocumentStoreClient(parameters.TenantId);
var handles = parameters.All["documentList"].Split('|');
var destinationHandle = parameters.All["resultingDocumentHandle"];
var destinationFileName = parameters.All["resultingDocumentFileName"];
if (!destinationFileName.EndsWith(".pdf", StringComparison.OrdinalIgnoreCase))
{
destinationFileName = Path.ChangeExtension(destinationFileName, ".pdf");
}
List <FileToComposeData> files = new List <FileToComposeData>();
foreach (var handle in handles)
{
var documentHandle = new DocumentHandle(handle);
Boolean pdfExists = false;
try
{
pdfExists = await InnerGetPdf(workingFolder, client, files, handle, documentHandle, pdfExists);
}
catch (System.Net.WebException ex)
{
Logger.WarnFormat("Handle {0} has no PDF format", handle);
}
if (!pdfExists)
{
int requeueCount = GetRequeueCount(parameters);
if (requeueCount <= 3) //first 3 times, always retry (lets DS the time to generate jobs)
{
return(GenerateRequeueProcessResult(requeueCount));
}
//need to check if this file has some job pending that can generate pdf.
var pendingJobs = await client.GetJobsAsync(documentHandle);
var fileName = await GetfileNameFromHandle(client, documentHandle);
Boolean needWaitForJobToRun = CheckIfSomeJobCanStillProducePdfFormat(pendingJobs, fileName, requeueCount);
//need to check if queue that can convert the document are still running. We need to wait for the queue to be stable.
if (needWaitForJobToRun)
{
return(GenerateRequeueProcessResult(requeueCount));
}
else
{
//This file has no pdf format, mark as missing pdf.
Logger.WarnFormat("Handle {0} has no pdf format, status of queue is {1}", handle, String.Join(",", pendingJobs.Select(j => String.Format("{0}[Executed:{1} Success:{2}]", j.QueueName, j.Executed, j.Success))));
files.Add(FileToComposeData.NoPdfFormat(handle, fileName));
}
}
}
//now compose everything.
PdfManipulator manipulator = new PdfManipulator(Logger); //Create a manipulator
foreach (var fileToCompose in files)
{
String pdfFileToAppend = fileToCompose.PdfFileName;
if (!fileToCompose.HasPdfFormat)
{
pdfFileToAppend = GeneratePlaceholderFile(workingFolder, fileToCompose.FileName, fileToCompose.DocumentHandle);
}
var error = manipulator.AppendDocumentAtEnd(pdfFileToAppend);
if (!String.IsNullOrEmpty(error))
{
throw new ApplicationException(String.Format("Unable to compose file {0} error {1}", fileToCompose.DocumentHandle, error));
}
}
manipulator.AddPageNumber();
String outputDirectory = Path.Combine(workingFolder, Guid.NewGuid().ToString());
Directory.CreateDirectory(outputDirectory);
var finalFileName = Path.Combine(outputDirectory, destinationFileName);
manipulator.Save(finalFileName);
var result = await client.UploadAsync(finalFileName, new DocumentHandle(destinationHandle));
return(ProcessResult.Ok);
}