public int DeterminePartition(IMessage message)
{
var key = ExtractKey(message);
int partition;
if (!string.IsNullOrEmpty(_producerOptions.PartitionSelectorExpression) && _expressionParser != null)
{
var expr = _expressionParser.ParseExpression(_producerOptions.PartitionSelectorExpression);
partition = expr.GetValue <int>(_evaluationContext, key);
}
else
{
partition = _partitionSelectorStrategy.SelectPartition(key, PartitionCount);
}
//// protection in case a user selector returns a negative.
return(Math.Abs(partition % PartitionCount));
}
