public static ulong GetIndex(string queueName, MemcachedQueueIndexType indexType)
{
if (string.IsNullOrWhiteSpace(queueName))
{
throw new ArgumentNullException("queueName");
}
queueName = queueName.Trim();
return(GetIndexById(GetQueueId(queueName), indexType));
}
private static string BuildIndexKey(string queueId, MemcachedQueueIndexType indexType)
{
if (indexType == MemcachedQueueIndexType.Enqueue)
{
return(string.Format("q-idx:{0}-en", queueId));
}
else if (indexType == MemcachedQueueIndexType.Dequeue)
{
return(string.Format("q-idx:{0}-de", queueId));
}
else // if (indexType == MemcachedQueueIndexType.ClearGarbage)
{
return(string.Format("q-idx:{0}-gc", queueId));
}
}
private static ulong GetIndexById(string queueId, MemcachedQueueIndexType indexType)
{
if (string.IsNullOrWhiteSpace(queueId)) // 队列列表里未找到指定名称的队列
{
return(0);
}
string indexKey = BuildIndexKey(queueId, indexType);
var client = MemcachedCacheHelper.GetClientInstance();
string index_string = client.Get(indexKey) as string;
ulong index;
if (string.IsNullOrWhiteSpace(index_string) ||
index_string == "0" ||
ulong.TryParse(index_string, out index) == false ||
index <= 0)
{
return(0);
}
return(index);
}