static async Task ProcessMessagesAsync(Message receivedMessage, CancellationToken token)
{
try
{
ProcessMessage(receivedMessage, "subscr");
await subscriptionMain.AbandonAsync(receivedMessage.SystemProperties.LockToken);
}
catch (Exception)
{
await subscriptionMain.AbandonAsync(receivedMessage.SystemProperties.LockToken);
}
}
private async Task OnMessage(Message messageToHandle, CancellationToken lockToken)
{
try {
string groupId = messageToHandle.UserProperties["CollectionId"].ToString();
if (_messageHolder.TryAdd(groupId, new HashSet <string>()))
{
_processedMessagesHolder.TryAdd(groupId, new ConcurrentDictionary <string, string>());
}
string dataJSON = Encoding.UTF8.GetString(messageToHandle.Body);
int totalMessagesCount = int.Parse(messageToHandle.UserProperties["Count"].ToString());
string updatedMessage = await ProcessMessage(messageToHandle, dataJSON);
if (!updatedMessage.Equals("", StringComparison.InvariantCultureIgnoreCase))
{
_processedMessagesHolder[groupId].TryAdd(messageToHandle.MessageId, updatedMessage);
}
await subscriptionClient.CompleteAsync(messageToHandle.SystemProperties.LockToken);
_messageHolder[groupId].Add(dataJSON);
int processedMessagesCount = _messageHolder[groupId].Count;
if (processedMessagesCount == totalMessagesCount)
{
// --- Get original messages list
HashSet <string> removed = new HashSet <string>();
_messageHolder.TryRemove(groupId, out removed);
IList <string> messagesList = removed.ToList();
// --- Get processed messages list
ConcurrentDictionary <string, string> removedDictionary = new ConcurrentDictionary <string, string>();
_processedMessagesHolder.TryRemove(groupId, out removedDictionary);
IList <string> processedMessagesList = null;
if (removedDictionary.Count > 0)
{
processedMessagesList = removedDictionary.Values.ToList();
}
if (!(logger is null))
{
logger.LogInformation(String.Format("====== PROCESSING GROUP OF {0} MESSAGES FOR {1} ======", totalMessagesCount.ToString(), messageToHandle.UserProperties["CollectionId"].ToString()));
}
await ProcessMessagesWhenLastReceived(messagesList, messageToHandle, processedMessagesList);
}
if (!(logger is null))
{
logger.LogInformation(String.Format("----- Processed message {0} of {1} for {2} -----", processedMessagesCount.ToString(), totalMessagesCount.ToString(), messageToHandle.UserProperties["CollectionId"].ToString()));
}
} catch (Exception ex) {
await subscriptionClient.AbandonAsync(messageToHandle.SystemProperties.LockToken);
//logger.LogError(ex.Message + ex.StackTrace);
//throw new ApplicationException(ex.Message + ex.StackTrace);
throw ex;
}
}
async Task ProcessMessagesAsync(Message message, CancellationToken token)
{
// Process the message.
var messageBody = Encoding.UTF8.GetString(message.Body);
var sequenceNumber = message.SystemProperties.SequenceNumber;
var messageId = message.MessageId;
if (MessageReceivedCounter == 0) // Set MessageSentTimeStamp on the first message that we send
{
MessageReceivedTimeStamp = DateTime.UtcNow;
}
MessageReceivedCounter++;
// Console.WriteLine($"Received message: MessageId:{messageId}, SequenceNumber:{sequenceNumber} Body:{messageBody}");
var r = _onMessageReceived(messageBody, message.MessageId, sequenceNumber);
if (r)
{
// Complete the message so that it is not received again.
// This can be done only if the subscriptionClient is created in ReceiveMode.PeekLock mode (which is the default).
await _subscriptionClient.CompleteAsync(message.SystemProperties.LockToken);
}
else
{
// Release message so it can be processed again
await _subscriptionClient.AbandonAsync(message.SystemProperties.LockToken);
}
// Note: Use the cancellationToken passed as necessary to determine if the subscriptionClient has already been closed.
// If subscriptionClient has already been closed, you can choose to not call CompleteAsync() or AbandonAsync() etc.
// to avoid unnecessary exceptions.
}
static async Task ProcessMessagesAsync(Message message, CancellationToken token)
{
// Process the message.
Console.WriteLine($"Received message: SequenceNumber:{message.SystemProperties.SequenceNumber} Body:{Encoding.UTF8.GetString(message.Body)}");
// This can be done only if the subscriptionClient is created in ReceiveMode.PeekLock mode (which is the default).
await subscriptionClient.AbandonAsync(message.SystemProperties.LockToken);
Console.WriteLine(message.SystemProperties.DeliveryCount);
}
public async Task <bool> WaitForPause(Message message, CancellationToken cancellationToken)
{
if (_pauseUntil > DateTimeOffset.UtcNow)
{
await _client.AbandonAsync(message.SystemProperties.LockToken);
Console.WriteLine("Pausing message handling until we are able to get new secrets.");
await Task.Delay(_pauseUntil.Subtract(DateTimeOffset.UtcNow), cancellationToken);
return(true);
}
return(false);
}
private async Task HandleMessageAsync(Message message, CancellationToken cancellationToken)
{
var formatter = new BinaryFormatter();
if (message.Body == null)
{
await _subClient.AbandonAsync(message.SystemProperties.LockToken);
return;
}
var objectStream = new MemoryStream(message.Body);
var updateEvent = (ContentPageChangeEventArgs)formatter.Deserialize(objectStream);
if (updateEvent.Title == null)
{
_logger.LogWarning($"Changeset {updateEvent.ChangesetId} has null title");
await _subClient.CompleteAsync(message.SystemProperties.LockToken);
return;
}
var prevMeta = _cache.GetPageMetadata(updateEvent.Title);
if (prevMeta != null && prevMeta.ChangeSetId > updateEvent.ChangesetId)
{
_logger.LogWarning($"Update to page {updateEvent.Title} has higher local rev, {prevMeta.ChangeSetId} > {updateEvent.ChangesetId}");
await _subClient.CompleteAsync(message.SystemProperties.LockToken);
return;
}
try
{
var(meta, page) = await _apiClient.GetPageAsync(updateEvent.Title, updateEvent.ChangesetId);
if (meta != null && page != null)
{
_cache.PutPageContent(updateEvent.Title, meta, page);
await _subClient.CompleteAsync(message.SystemProperties.LockToken);
_logger.LogInformation($"Updated page {updateEvent.Title} to rev {updateEvent.ChangesetId}");
}
}
catch (Exception exc)
{
_logger.LogError(exc, "MW getting update failed");
}
}
public async Task ReceiveMessageFromTopic <T>(Func <T, MessageProcessResponse> onProcess)
{
MessageHandlerOptions options = new MessageHandlerOptions(e =>
{
Trace.TraceError(e.Exception.Message);
return(Task.CompletedTask);
})
{
AutoComplete = false,
MaxAutoRenewDuration = TimeSpan.FromMinutes(1)
};
await Task.Run(() => _subscriptionClient.RegisterMessageHandler(
async(message, token) =>
{
try
{
// Get message
string data = Encoding.UTF8.GetString(message.Body);
T item = JsonConvert.DeserializeObject <T>(data);
// Process message
MessageProcessResponse result = onProcess(item);
switch (result)
{
case MessageProcessResponse.Complete:
await _subscriptionClient.CompleteAsync(message.SystemProperties.LockToken);
break;
case MessageProcessResponse.Abandon:
await _subscriptionClient.AbandonAsync(message.SystemProperties.LockToken);
break;
case MessageProcessResponse.Dead:
await _subscriptionClient.DeadLetterAsync(message.SystemProperties.LockToken);
break;
}
}
catch (Exception ex)
{
await _subscriptionClient.DeadLetterAsync(message.SystemProperties.LockToken);
Trace.TraceError(ex.Message);
}
}, options));
}
private async Task MessageHandler(Message message, CancellationToken cancellationToken)
{
try
{
var payload = Encoding.Default.GetString(message.Body);
var evt = JsonConvert.DeserializeObject <LifeCycleEvent>(
payload, _serializerSettings);
NotifySubscribers(evt);
await _subscriptionClient
.CompleteAsync(message.SystemProperties.LockToken)
.ConfigureAwait(false);
}
catch
{
await _subscriptionClient.AbandonAsync(message.SystemProperties.LockToken);
}
}
private async Task ProcessMessagesAsync(Message message, CancellationToken cancellationToken)
{
// Process the message.
await _messageHandler(message, cancellationToken);
// The cancellationToken is used to determine if the subscriptionClient has already been closed.
if (cancellationToken.IsCancellationRequested)
{
// If subscriptionClient has already been closed, call AbandonAsync() to avoid unnecessary exceptions.
await _subscriptionClient.AbandonAsync(message.SystemProperties.LockToken);
}
else
{
// Complete the message so that it is not received again.
// This can be done only if the subscriptionClient is created in ReceiveMode.PeekLock mode (which is the default).
await _subscriptionClient.CompleteAsync(message.SystemProperties.LockToken);
}
}
public Task AbandonAsync(string lockToken, IDictionary <string, object> propertiesToModify = null)
{
return(_subscriptionClient.AbandonAsync(lockToken, propertiesToModify));
}
public override async Task AbandonEvent(string locktoken)
{
await _subscriptionClient.AbandonAsync(locktoken);
}