|
public static GetCursors ( string cursor, string prefix ) : List |
||
| cursor | string | |
| prefix | string | |
| return | List |
|
public ScaleoutSubscription(string identity,
IList <string> eventKeys,
string cursor,
IList <ScaleoutMappingStore> streams,
Func <MessageResult, object, Task <bool> > callback,
int maxMessages,
IPerformanceCounterManager counters,
object state)
: base(identity, eventKeys, callback, maxMessages, counters, state)
{
if (streams == null)
{
throw new ArgumentNullException("streams");
}
_streams = streams;
List <Cursor> cursors = null;
if (String.IsNullOrEmpty(cursor))
{
cursors = new List <Cursor>();
}
else
{
cursors = Cursor.GetCursors(cursor, _scaleoutCursorPrefix);
// If the cursor had a default prefix, "d-", cursors might be null
if (cursors == null)
{
cursors = new List <Cursor>();
}
// If the streams don't match the cursors then throw it out
else if (cursors.Count != _streams.Count)
{
cursors.Clear();
}
}
// No cursors so we need to populate them from the list of streams
if (cursors.Count == 0)
{
for (int streamIndex = 0; streamIndex < _streams.Count; streamIndex++)
{
AddCursorForStream(streamIndex, cursors);
}
}
_cursors = cursors;
}
public DefaultSubscription(string identity,
IList <string> eventKeys,
TopicLookup topics,
string cursor,
Func <MessageResult, object, Task <bool> > callback,
int maxMessages,
IStringMinifier stringMinifier,
IPerformanceCounterManager counters,
object state) :
base(identity, eventKeys, callback, maxMessages, counters, state)
{
_stringMinifier = stringMinifier;
if (String.IsNullOrEmpty(cursor))
{
_cursors = GetCursorsFromEventKeys(EventKeys, topics);
}
else
{
// Ensure delegate continues to use the C# Compiler static delegate caching optimization.
_cursors = Cursor.GetCursors(cursor, _defaultCursorPrefix, (k, s) => UnminifyCursor(k, s), stringMinifier) ?? GetCursorsFromEventKeys(EventKeys, topics);
}
_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);
}
}