public Announcement Read(ReadAnnouncement request)
{
using (var connection = Connections.ConnectToInitializedTopic(request.TopicName))
{
var topicSubscriber = connection.FirstOrDefault <Subscriber>(subscriber =>
subscriber.Id == request.SubscriberId);
if (topicSubscriber == null)
{
throw new ArgumentException("Unknown subscriber");
}
var announcement = ReadFromDb(connection, topicSubscriber, request);
return(announcement);
}
}
public void Create(CreateSubscription request)
{
var topicLock = Locks.TakeTopicLock(request.TopicName);
lock (topicLock)
{
if (Locks.TopicsRecoveryLocks.ContainsKey(request.TopicName))
{
throw new Exception($"Topic {request.TopicName} is inconsistent");
}
using (var connection = Connections.ConnectToInitializedTopic(request.TopicName))
{
Create(connection, request);
}
}
}
public void Delete(DeleteSubscription request)
{
var topicLock = Locks.TakeTopicLock(request.TopicName);
lock (topicLock)
{
if (Locks.TopicsRecoveryLocks.ContainsKey(request.TopicName))
{
throw new Exception($"Topic {request.TopicName} is inconsistent");
}
using (var connection = Connections.ConnectToInitializedTopic(request.TopicName))
{
connection.DeleteById <Subscriber>(request.SubscriberId);
}
Propagators.ScheduleTopicOperation(request.TopicName, () => Propagate(request));
}
}
