public async Task SubscribeAsync(Func <PunchyMessage, Task> onMessageAsync, string groupId, CancellationToken cancellationToken, params string[] topics)
{
if (onMessageAsync == null)
{
throw new ArgumentNullException(nameof(onMessageAsync));
}
if (groupId == null)
{
throw new ArgumentNullException(nameof(groupId));
}
if (!TopicNameHelpers.IsValid(groupId))
{
throw new ArgumentException(
$"The groupId must match regex pattern: '{TopicNameHelpers.TopicOrGroupIdValidationRegexPattern}'", nameof(groupId));
}
var messageHandler = new MessageHandler(onMessageAsync, pubSub, logger, configuration, groupId);
var retryerTopics = new List <string>();
foreach (var topic in topics)
{
if (!TopicNameHelpers.IsValid(topic))
{
throw new ArgumentException(
$"The topic name must match regex pattern: '{TopicNameHelpers.TopicOrGroupIdValidationRegexPattern}'. " +
$"Validation failed for '{topic}'.", nameof(topics));
}
if (!TopicNameHelpers.IsBadMessageTopic(topic))
{
for (int i = 0; i < configuration.LevelDelaysInSeconds.Length; i++)
{
retryerTopics.Add(TopicNameHelpers.BuildBadMessageTopicName(topic, i, groupId));
}
}
}
var subscription = pubSub.Subscribe(messageHandler, groupId, topics.Union(retryerTopics).ToArray());
messageHandler.Subscription = subscription;
await subscription.StartAsync(cancellationToken);
}
