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test backup meets key locked error (pingcap#74)
Signed-off-by: Neil Shen <overvenus@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| // Copyright 2019 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| // This file is copied from pingcap/tidb/store/tikv/pd_codec.go https://git.io/Je1Ww | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/kvproto/pkg/metapb" | ||
| pd "github.com/pingcap/pd/client" | ||
| "github.com/pingcap/tidb/util/codec" | ||
| ) | ||
|
|
||
| type codecPDClient struct { | ||
| pd.Client | ||
| } | ||
|
|
||
| // GetRegion encodes the key before send requests to pd-server and decodes the | ||
| // returned StartKey && EndKey from pd-server. | ||
| func (c *codecPDClient) GetRegion(ctx context.Context, key []byte) (*metapb.Region, *metapb.Peer, error) { | ||
| encodedKey := codec.EncodeBytes(nil, key) | ||
| region, peer, err := c.Client.GetRegion(ctx, encodedKey) | ||
| return processRegionResult(region, peer, err) | ||
| } | ||
|
|
||
| func (c *codecPDClient) GetPrevRegion(ctx context.Context, key []byte) (*metapb.Region, *metapb.Peer, error) { | ||
| encodedKey := codec.EncodeBytes(nil, key) | ||
| region, peer, err := c.Client.GetPrevRegion(ctx, encodedKey) | ||
| return processRegionResult(region, peer, err) | ||
| } | ||
|
|
||
| // GetRegionByID encodes the key before send requests to pd-server and decodes the | ||
| // returned StartKey && EndKey from pd-server. | ||
| func (c *codecPDClient) GetRegionByID(ctx context.Context, regionID uint64) (*metapb.Region, *metapb.Peer, error) { | ||
| region, peer, err := c.Client.GetRegionByID(ctx, regionID) | ||
| return processRegionResult(region, peer, err) | ||
| } | ||
|
|
||
| func (c *codecPDClient) ScanRegions( | ||
| ctx context.Context, | ||
| startKey []byte, | ||
| endKey []byte, | ||
| limit int, | ||
| ) ([]*metapb.Region, []*metapb.Peer, error) { | ||
| startKey = codec.EncodeBytes(nil, startKey) | ||
| if len(endKey) > 0 { | ||
| endKey = codec.EncodeBytes(nil, endKey) | ||
| } | ||
|
|
||
| regions, peers, err := c.Client.ScanRegions(ctx, startKey, endKey, limit) | ||
| if err != nil { | ||
| return nil, nil, errors.Trace(err) | ||
| } | ||
| for _, region := range regions { | ||
| if region != nil { | ||
| err = decodeRegionMetaKey(region) | ||
| if err != nil { | ||
| return nil, nil, errors.Trace(err) | ||
| } | ||
| } | ||
| } | ||
| return regions, peers, nil | ||
| } | ||
|
|
||
| func processRegionResult(region *metapb.Region, peer *metapb.Peer, err error) (*metapb.Region, *metapb.Peer, error) { | ||
| if err != nil { | ||
| return nil, nil, errors.Trace(err) | ||
| } | ||
| if region == nil { | ||
| return nil, nil, nil | ||
| } | ||
| err = decodeRegionMetaKey(region) | ||
| if err != nil { | ||
| return nil, nil, errors.Trace(err) | ||
| } | ||
| return region, peer, nil | ||
| } | ||
|
|
||
| func decodeRegionMetaKey(r *metapb.Region) error { | ||
| if len(r.StartKey) != 0 { | ||
| _, decoded, err := codec.DecodeBytes(r.StartKey, nil) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| r.StartKey = decoded | ||
| } | ||
| if len(r.EndKey) != 0 { | ||
| _, decoded, err := codec.DecodeBytes(r.EndKey, nil) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| r.EndKey = decoded | ||
| } | ||
| return nil | ||
| } |
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