/// <summary>
/// Open queue and all its files.
/// </summary>
/// <returns>Task when completed.</returns>
public async Task Open()
{
var fileNames = Directory.GetFiles(_queueDirectory, _queueName + "_*.data")
.OrderBy(x => x);
foreach (var fileName in fileNames)
{
var file = new QueueFile(_queueDirectory, fileName);
await file.Open();
_files.AddLast(file);
}
if (_files.Count == 0)
{
var newFile = await CreateNewFile();
_files.AddLast(newFile);
}
var count = _files.Sum(x => x.RecordCount);
if (count > 0)
{
_newMessageNotification.Release(count);
}
}
private async Task <QueueFile> CreateNewFile()
{
var counter = 0;
var fileName = $"{_queueName}_{DateTime.UtcNow:MMddHHmmss}-{counter:00}.data";
//guard against many files being creating at the same second.
while (File.Exists(Path.Combine(_queueDirectory, fileName)))
{
counter++;
fileName = $"{_queueName}_{DateTime.UtcNow:MMddHHmmss}-{counter:00}.data";
}
var file = new QueueFile(_queueDirectory, fileName);
await file.Open();
return(file);
}
