public void Batch_SetItem(WriteBatch wb, byte[] key, IValue item)
{
//var snapshot = Helper.CreateSnapshot(db);
byte[] key_count = Helper.tagKey_MapCount.Concat(this.Value).ToArray();
byte[] data = wb.Get(key_count);
if (data == null || data.Length == 0)
{
throw new Exception("error map in Count");
}
var count = BitConverter.ToUInt64(data, 0);
//写入字典项
var _key = Helper.tagKey_MapValues.Concat(this.Value).Concat(key).ToArray();
var value = wb.Get(_key);
bool bAdd = value == null;
(item as IValueCreator).Batch_PutToDB(wb, db, _key);
if (bAdd)
{//更新count
count++;
data = BitConverter.GetBytes(count);
wb.Put(key_count, data);
}
}
public void Batch_PutToDB(WriteBatch batch, LevelDB.DB db, byte[] key)
{
//var snapshot = Helper.CreateSnapshot(db);
if (this.Value == null)
{//申请新的实例ID，然后初始化存储Map
var key_instMax = Helper.tagKey_InstanceMax;
var instid = batch.Get(key_instMax);
if (instid == null || instid.Length == 0)
{
instid = BitConverter.GetBytes((UInt64)1);
}
this.Value = instid;
this.db = db;
//刷新max
{
UInt64 v = BitConverter.ToUInt64(instid, 0);
v++;
instid = BitConverter.GetBytes((UInt64)v);
batch.Put(key_instMax, instid);
}
//初始化字典数量
byte[] key_count = Helper.tagKey_MapCount.Concat(this.Value).ToArray();
batch.Put(key_count, BitConverter.GetBytes((UInt64)0));
}
else
{//检查count是否存在，
byte[] key_count = Helper.tagKey_MapCount.Concat(this.Value).ToArray();
var count = batch.Get(key_count);
if (count == null || count.Length == 0)
{
throw new Exception("error map instance.");
}
}
batch.Put(key, Helper.tagValue_Map.Concat(this.Value).ToArray());
}