实现一个内存里面放入三个字典实现字典分片
static CacheCutting()
{
_DictionaryList = new List<Dictionary<string, object>>();
_ObjectList = new List<object>();
_DictionaryList.Add(_KeyValues1);
_DictionaryList.Add(_KeyValues2);
_DictionaryList.Add(_KeyValues3);
//加线程锁
for (int i = 0; i < _DictionaryList.Count; i++)
{
_ObjectList.Add(new object());
}
}
private static Dictionary<string, object> _KeyValues1 = new Dictionary<string, object>();
private static Dictionary<string, object> _KeyValues2 = new Dictionary<string, object>();
private static Dictionary<string, object> _KeyValues3 = new Dictionary<string, object>();
private static List<Dictionary<string, object>> _DictionaryList;
private static List<object> _ObjectList;
public static void SetValue(string key, object value)
{
int hashKey = key.GetHashCode();
int index = GetInt(key);
lock (_ObjectList[index])
_DictionaryList[index].Add(key, value);
}
public static object GetValue(string key)
{
object result = null;
int hashKey = key.GetHashCode();
int index = GetInt(key);
lock (_ObjectList[index])
{
if (_DictionaryList[index].ContainsKey(key))
result = _DictionaryList[index][key];
}
return result;
}
private static int GetInt(string key)
{
int hashKey = key.GetHashCode();
int hashList = hashKey % _DictionaryList.Count;
return Math.Abs(hashList);
}