public Task <HttpResponseMessage> ExportDocumentsLeftToReplicate([FromBody] StudioTasksController.ExportData optionsJson)
{
var result = GetEmptyMessage();
var taskId = optionsJson.ProgressTaskId;
var status = new OperationStatus();
var tcs = new TaskCompletionSource <object>();
try
{
var sp = Stopwatch.StartNew();
Database.Tasks.AddTask(tcs.Task, status, new TaskActions.PendingTaskDescription
{
StartTime = SystemTime.UtcNow,
TaskType = TaskActions.PendingTaskType.ExportDocumentsLeftToReplicate,
Description = "Monitoring progress of export of docs left to replicate"
}, taskId, null, skipStatusCheck: true);
var requestString = optionsJson.DownloadOptions;
ServerInfo serverInfo;
using (var jsonReader = new RavenJsonTextReader(new StringReader(requestString)))
{
var serializer = JsonExtensions.CreateDefaultJsonSerializer();
serverInfo = (ServerInfo)serializer.Deserialize(jsonReader, typeof(ServerInfo));
}
var documentsToReplicateCalculator = new DocumentsLeftToReplicate(Database);
if (serverInfo.SourceId != documentsToReplicateCalculator.DatabaseId)
{
throw new InvalidOperationException("Cannot export documents to replicate from a server other than this one!");
}
// create PushStreamContent object that will be called when the output stream will be ready.
result.Content = new PushStreamContent((outputStream, content, arg3) =>
{
using (var writer = new ExcelOutputWriter(outputStream))
{
try
{
writer.WriteHeader();
writer.Write("document-ids-left-to-replicate");
long count = 0;
long skipped = 0;
Action <string> action = (documentId) =>
{
writer.Write(documentId);
if (++count % 1000 != 0)
{
return;
}
status.MarkProgress($"Exported {count:#,#} documents");
outputStream.Flush();
};
Action skippedAction = () =>
{
if (++skipped % 100 != 0)
{
return;
}
status.MarkProgress($"Skipped {skipped:#,#} documents");
outputStream.Flush();
};
documentsToReplicateCalculator.ExtractDocumentIds(serverInfo, action, skippedAction);
var message = $"Completed export of {count:#,#} document ids";
status.MarkCompleted(message, sp.Elapsed);
}
catch (Exception e)
{
status.ExceptionDetails = e.ToString();
status.MarkFaulted(e.ToString());
writer.WriteError(e);
throw;
}
finally
{
tcs.SetResult("Completed");
outputStream.Close();
}
}
});
var fileName = $"Documents to replicate from '{serverInfo.SourceUrl}' to '{serverInfo.DestinationUrl}', " +
$"{DateTime.Now.ToString("yyyy-MM-dd HH-mm", CultureInfo.InvariantCulture)}";
foreach (char c in Path.GetInvalidFileNameChars())
{
fileName = fileName.Replace(c, '_');
}
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = fileName + ".csv"
};
}
catch (Exception e)
{
status.ExceptionDetails = e.ToString();
status.MarkFaulted(e.ToString());
tcs.SetResult("Completed");
throw;
}
return(new CompletedTask <HttpResponseMessage>(result));
}