public IPAddress Pick(QueryHint hint)
{
lock (_lock)
{
IPAddress endpoint = null;
if (0 < _healthyEndpoints.Count)
{
endpoint = _healthyEndpoints[0];
}
return endpoint;
}
}
public IPAddress Pick(QueryHint hint)
{
lock (_lock)
{
IPAddress endpoint = null;
if (0 < _healthyEndpoints.Count)
{
int candidate = _rnd.Next(_healthyEndpoints.Count);
endpoint = _healthyEndpoints[candidate];
}
return endpoint;
}
}
private string BuildQuery(string Query)
{
if (Hints.Count != 0)
{
string sQHints = "";
sQHints = Hints.GenerateString <QueryHint>();
var tHints = GetTableHints();
if (sQHints != string.Empty)
{
Query = QueryHint.BuildQuery(Query, sQHints);
}
if (tHints.Count > 0)
{
Query = BuildTableQuery(tHints, Query);
}
}
return(Query);
}
public IConnection GetConnection(QueryHint hint = null)
{
lock (_globalLock)
{
IConnection connection = null;
try
{
while (null == connection)
{
// pick and initialize a new endpoint connection
IPAddress endpoint = _endpointStrategy.Pick(hint);
if (null == endpoint)
{
throw new ArgumentException("Can't find any valid endpoint");
}
if (!_ip2Connection.TryGetValue(endpoint, out connection))
{
// try to create a new connection - if this fails, recover the endpoint
connection = CreateTransportOrMarkEndpointForRecovery(endpoint);
if (null != connection)
{
_ip2Connection.Add(endpoint, connection);
}
}
}
return connection;
}
catch
{
connection.SafeDispose();
throw;
}
}
}
public void AddHint(QueryHint hint)
{
_hints.Add(hint);
}
