/// <summary>
/// init
/// </summary>
/// <param name="arrNodes"></param>
public void Init(string[] arrNodes)
{
if (arrNodes == null || arrNodes.Length == 0)
{
throw new ArgumentNullException("arrNodes");
}
this._arrNodes = arrNodes.Distinct().ToArray();
this._dic.Clear();
this._keys = null;
foreach (var node in arrNodes)
{
for (int i = 0; i < 250; i++)
{
var hashCode = Ketama.GetHashCode(string.Concat(node, "-", i.ToString()));
this._dic[hashCode] = node;
}
}
var listKeys = this._dic.Keys.ToList();
listKeys.Sort();
this._keys = listKeys.ToArray();
}
/// <summary>
/// calc
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public string GetNode(string key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
var i = Array.BinarySearch(this._keys, Ketama.GetHashCode(key));
if (i < 0)
{
i = ~i;
if (i >= this._keys.Length)
{
i = 0;
}
}
return(this._dic[this._keys[i]]);
}