// Locates the region in which the given row key for the given table is.
func (c *Client) locateRegion(ctx context.Context,
table, key []byte) (*regioninfo.Info, string, uint16, error) {
metaKey := createRegionSearchKey(table, key)
rpc, err := hrpc.NewGetBefore(ctx, metaTableName, metaKey, hrpc.Families(infoFamily))
if err != nil {
return nil, "", 0, err
}
rpc.SetRegion(c.metaRegionInfo)
resp, err := c.sendRPC(rpc)
if err != nil {
ch := c.metaRegionInfo.GetAvailabilityChan()
if ch != nil {
select {
case <-ch:
return c.locateRegion(ctx, table, key)
case <-rpc.GetContext().Done():
return nil, "", 0, ErrDeadline
}
} else {
return nil, "", 0, err
}
}
metaRow := resp.(*pb.GetResponse)
if metaRow.Result == nil {
return nil, "", 0, TableNotFound
}
reg, host, port, err := c.parseMetaTableResponse(metaRow)
if err != nil {
return nil, "", 0, err
}
if !bytes.Equal(table, reg.Table) {
// This would indicate a bug in HBase.
return nil, "", 0, fmt.Errorf("WTF: Meta returned an entry for the wrong table!"+
" Looked up table=%q key=%q got region=%s", table, key, reg)
} else if len(reg.StopKey) != 0 &&
bytes.Compare(key, reg.StopKey) >= 0 {
// This would indicate a hole in the meta table.
return nil, "", 0, fmt.Errorf("WTF: Meta returned an entry for the wrong region!"+
" Looked up table=%q key=%q got region=%s", table, key, reg)
}
return reg, host, port, nil
}
// Locates the region in which the given row key for the given table is.
func (c *Client) locateRegion(ctx context.Context, table, key []byte) (*region.Client, *regioninfo.Info, error) {
metaKey := createRegionSearchKey(table, key)
rpc, _ := hrpc.NewGetBefore(ctx, metaTableName, metaKey, hrpc.Families(infoFamily))
rpc.SetRegion(c.metaRegionInfo)
resp, err := c.sendRPC(rpc)
if err != nil {
ch := c.metaRegionInfo.GetAvailabilityChan()
if ch != nil {
select {
case <-ch:
return c.locateRegion(ctx, table, key)
case <-rpc.GetContext().Done():
return nil, nil, ErrDeadline
}
} else {
return nil, nil, err
}
}
return c.discoverRegion(ctx, resp.(*pb.GetResponse))
}