private async Task <RegionInfo> FindRegionInfoForRPC(byte[] table, byte[] key, CancellationToken token)
{
var result = default(RegionInfo);
var searchKey = RegionInfo.CreateRegionSearchKey(table, key);
var rpc = new ScanCall(_metaTableName, searchKey, table)
{
Families = _infoFamily,
CloseScanner = true,
Reversed = true,
NumberOfRows = 1,
Info = _metaRegionInfo
};
await _metaClient.QueueRPC(rpc);
var res = await _metaClient.GetRPCResult(rpc.CallId);
if (res?.Msg is ScanResponse scanResponse)
{
result = RegionInfo.ParseFromScanResponse(scanResponse);
}
if (result != null)
{
_logger.LogInformation($"Find region info :{result.Name.ToUtf8String()}, at {result.Host}:{result.Port}");
}
return(result);
}
private RegionInfo GetInfoFromCache(byte[] table, byte[] key)
{
if (BinaryComparer.Compare(table, _metaTableName) == 0)
{
return(_metaRegionInfo);
}
var search = RegionInfo.CreateRegionSearchKey(table, key);
var info = _cache.GetInfo(search);
if (info == null || false == BinaryComparer.Equals(table, info.Table))
{
return(null);
}
if (info.StopKey.Length > 0 && BinaryComparer.Compare(key, info.StopKey) >= 0)
{
return(null);
}
return(info);
}
public RegionInfo GetInfo(byte[] table, byte[] key)
{
var search = RegionInfo.CreateRegionSearchKey(table, key);
return(GetInfo(search));
}