public ScaleoutSubscription(string identity,
IEnumerable <string> eventKeys,
string cursor,
ConcurrentDictionary <string, Linktionary <ulong, ScaleoutMapping> > streamMappings,
Func <MessageResult, Task <bool> > callback,
int maxMessages,
IPerformanceCounterManager counters)
: base(identity, eventKeys, callback, maxMessages, counters)
{
if (streamMappings == null)
{
throw new ArgumentNullException("streamMappings");
}
_streams = streamMappings;
IEnumerable <Cursor> cursors = null;
if (cursor == null)
{
cursors = from key in _streams.Keys
select new Cursor(key, GetCursorId(key));
}
else
{
cursors = Cursor.GetCursors(cursor);
}
_cursors = new List <Cursor>(cursors);
}
public DefaultSubscription(string identity,
IEnumerable <string> eventKeys,
IDictionary <string, Topic> topics,
string cursor,
Func <MessageResult, Task <bool> > callback,
int maxMessages,
IPerformanceCounterManager counters) :
base(identity, eventKeys, callback, maxMessages, counters)
{
IEnumerable <Cursor> cursors = null;
if (cursor == null)
{
cursors = from key in eventKeys
select new Cursor
{
Key = key,
Id = GetMessageId(topics, key)
};
}
else
{
cursors = Cursor.GetCursors(cursor);
}
_cursors = new List <Cursor>(cursors);
_cursorTopics = new List <Topic>();
if (!String.IsNullOrEmpty(cursor))
{
// Update all of the cursors so we're within the range
for (int i = _cursors.Count - 1; i >= 0; i--)
{
Cursor c = _cursors[i];
Topic topic;
if (!eventKeys.Contains(c.Key))
{
_cursors.Remove(c);
}
else if (topics.TryGetValue(_cursors[i].Key, out topic) && _cursors[i].Id > topic.Store.GetMessageCount())
{
UpdateCursor(c.Key, 0);
}
}
}
// Add dummy entries so they can be filled in
for (int i = 0; i < _cursors.Count; i++)
{
_cursorTopics.Add(null);
}
}