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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| // Copyright 2023 TiKV Project Authors. | ||
| // | ||
| // 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, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package pd | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
|
|
||
| "github.com/opentracing/opentracing-go" | ||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/kvproto/pkg/tsopb" | ||
| "github.com/tikv/pd/client/grpcutil" | ||
| "google.golang.org/grpc" | ||
| ) | ||
|
|
||
| // TsoClient manages TSO data. | ||
| type TsoClient interface { | ||
| // LoadTimestamp loads and returns timestamp. | ||
| LoadTimestamp(ctx context.Context, key string) (uint64, error) | ||
| // SaveTimestamp saves the timestamp. | ||
| SaveTimestamp(ctx context.Context, key string, timestamp uint64) error | ||
| } | ||
|
|
||
| // tsoClient returns the TsoClient from current PD leader. | ||
| func (c *client) tsoClient() tsopb.TsoClient { | ||
| if cc, ok := c.clientConns.Load(c.GetLeaderAddr()); ok { | ||
| return tsopb.NewTsoClient(cc.(*grpc.ClientConn)) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // LoadTimestamp loads and returns timestamp. | ||
| func (c *client) LoadTimestamp(ctx context.Context, key string) (uint64, error) { | ||
| if span := opentracing.SpanFromContext(ctx); span != nil { | ||
| span = opentracing.StartSpan("tsoClient.LoadTimestamp", opentracing.ChildOf(span.Context())) | ||
| defer span.Finish() | ||
| } | ||
| start := time.Now() | ||
| defer func() { cmdDurationLoadTimestamp.Observe(time.Since(start).Seconds()) }() | ||
| ctx, cancel := context.WithTimeout(ctx, c.option.timeout) | ||
| req := &tsopb.LoadTimestampRequest{ | ||
| Header: c.requestHeader(), | ||
| Key: key, | ||
| } | ||
| ctx = grpcutil.BuildForwardContext(ctx, c.GetLeaderAddr()) | ||
| resp, err := c.tsoClient().LoadTimestamp(ctx, req) | ||
| cancel() | ||
|
|
||
| if err != nil { | ||
| cmdFailedDurationLoadTimestamp.Observe(time.Since(start).Seconds()) | ||
| c.ScheduleCheckLeader() | ||
| return 0, err | ||
| } | ||
|
|
||
| if resp.Header.GetError() != nil { | ||
| cmdFailedDurationLoadTimestamp.Observe(time.Since(start).Seconds()) | ||
| return 0, errors.Errorf("Load timestamp %s failed: %s", key, resp.Header.GetError().String()) | ||
| } | ||
|
|
||
| return resp.Timestamp, nil | ||
| } | ||
|
|
||
| // SaveTimestamp saves the timestamp. | ||
| func (c *client) SaveTimestamp(ctx context.Context, key string, timestamp uint64) error { | ||
| if span := opentracing.SpanFromContext(ctx); span != nil { | ||
| span = opentracing.StartSpan("tsoClient.SaveTimestamp", opentracing.ChildOf(span.Context())) | ||
| defer span.Finish() | ||
| } | ||
| start := time.Now() | ||
| defer func() { cmdDurationSaveTimestamp.Observe(time.Since(start).Seconds()) }() | ||
| ctx, cancel := context.WithTimeout(ctx, c.option.timeout) | ||
| req := &tsopb.SaveTimestampRequest{ | ||
| Header: c.requestHeader(), | ||
| Key: key, | ||
| Timestamp: timestamp, | ||
| } | ||
| ctx = grpcutil.BuildForwardContext(ctx, c.GetLeaderAddr()) | ||
| resp, err := c.tsoClient().SaveTimestamp(ctx, req) | ||
| cancel() | ||
|
|
||
| if err != nil { | ||
| cmdFailedDurationSaveTimestamp.Observe(time.Since(start).Seconds()) | ||
| c.ScheduleCheckLeader() | ||
| return err | ||
| } | ||
|
|
||
| if resp.Header.GetError() != nil { | ||
| cmdFailedDurationSaveTimestamp.Observe(time.Since(start).Seconds()) | ||
| return errors.Errorf("Save timestamp %d to %s failed: %s", timestamp, key, resp.Header.GetError().String()) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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