protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
try
{
if (!await _reader.Ensure(stoppingToken))
{
_logger.LogError("Cannot ensure that Azure storage queue exists.");
return;
}
if (!await _writer.Verify(stoppingToken))
{
_logger.LogError("Cannot verify MongoDB database connection.");
return;
}
while (!stoppingToken.IsCancellationRequested)
{
var messages = _reader.GetChanges(stoppingToken);
await foreach (var message in messages.WithCancellation(stoppingToken))
{
var change = message.Change;
_logger.LogInformation("a1. Process Mutation with Entity ID: {entityId}; MutationId: {mutationId}", change.EntityId, change.MutationId);
if (await _writer.Append(change, stoppingToken))
{
_logger.LogInformation("a2. Successful processed Entity ID: {entityId}; MutationId: {mutationId}",
change.EntityId, change.MutationId);
await _reader.DeleteMessage(message, stoppingToken);
}
else
{
_logger.LogWarning("a2. Cannot process Entity ID: {entityId}; MutationId: {mutationId}", change.EntityId, change.MutationId);
}
}
_logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
await Task.Delay(100, stoppingToken);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
throw;
}
}