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adaptation to oracle checkpoint (#1097)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,209 @@ | ||
| // Copyright 2021 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. | ||
|
|
||
| package checkpoint | ||
|
|
||
| import ( | ||
| "context" | ||
| dbsql "database/sql" | ||
| "encoding/json" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/log" | ||
| "go.uber.org/zap" | ||
|
|
||
| // mysql driver | ||
| _ "github.com/go-sql-driver/mysql" | ||
| "github.com/pingcap/tidb-binlog/pkg/loader" | ||
| "github.com/pingcap/tidb-binlog/pkg/util" | ||
| ) | ||
|
|
||
| // OracleCheckPoint is a local savepoint struct for Oracle | ||
| type OracleCheckPoint struct { | ||
| sync.RWMutex | ||
| closed bool | ||
| clusterID uint64 | ||
| initialCommitTS int64 | ||
|
|
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| db *dbsql.DB | ||
| schema string | ||
| table string | ||
|
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| ConsistentSaved bool `toml:"consistent" json:"consistent"` | ||
| CommitTS int64 `toml:"commitTS" json:"commitTS"` | ||
| TsMap map[string]int64 `toml:"ts-map" json:"ts-map"` | ||
| Version int64 `toml:"schema-version" json:"schema-version"` | ||
| } | ||
|
|
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| var _ CheckPoint = &OracleCheckPoint{} | ||
|
|
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| var sqlOpenOracleDB = loader.CreateOracleDB | ||
|
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| func newOracle(cfg *Config) (CheckPoint, error) { | ||
| setDefaultConfig(cfg) | ||
|
|
||
| if cfg.Db.TLS != nil { | ||
| log.Info("enable TLS for saving checkpoint") | ||
| } | ||
|
|
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| db, err := sqlOpenOracleDB(cfg.Db.User, cfg.Db.Password, cfg.Db.Host, cfg.Db.Port, cfg.Db.OracleServiceName, cfg.Db.OracleConnectString) | ||
| if err != nil { | ||
| return nil, errors.Annotate(err, "open db failed") | ||
| } | ||
|
|
||
| sp := &OracleCheckPoint{ | ||
| db: db, | ||
| clusterID: cfg.ClusterID, | ||
| initialCommitTS: cfg.InitialCommitTS, | ||
| schema: cfg.Schema, | ||
| table: cfg.Table, | ||
| TsMap: make(map[string]int64), | ||
| } | ||
|
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| sql := genCheckTableIsExist2o(sp) | ||
|
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| var tableName string | ||
| err = db.QueryRow(sql).Scan(&tableName) | ||
| switch { | ||
| case err == dbsql.ErrNoRows: | ||
| sql = genCreateTable2o(sp) | ||
| if _, err = db.Exec(sql); err != nil { | ||
| return nil, errors.Annotatef(err, "create checkpoint table failed, sql: %s", sql) | ||
| } | ||
| case err != nil: | ||
| return nil, errors.Annotatef(err, "exec failed, sql: %s", sql) | ||
| } | ||
|
|
||
| if sp.clusterID == 0 { | ||
| id, err := getClusterID(db, sp.schema, sp.table) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| log.Info("set cluster id", zap.Uint64("id", id)) | ||
| sp.clusterID = id | ||
| } | ||
|
|
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| err = sp.Load() | ||
| return sp, errors.Trace(err) | ||
| } | ||
|
|
||
| // Load implements CheckPoint.Load interface | ||
| func (sp *OracleCheckPoint) Load() error { | ||
| sp.Lock() | ||
| defer sp.Unlock() | ||
|
|
||
| if sp.closed { | ||
| return errors.Trace(ErrCheckPointClosed) | ||
| } | ||
|
|
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| defer func() { | ||
| if sp.CommitTS == 0 { | ||
| sp.CommitTS = sp.initialCommitTS | ||
| } | ||
| }() | ||
|
|
||
| var str string | ||
| selectSQL := genSelectSQL2o(sp) | ||
| err := sp.db.QueryRow(selectSQL).Scan(&str) | ||
| switch { | ||
| case err == dbsql.ErrNoRows: | ||
| sp.CommitTS = sp.initialCommitTS | ||
| return nil | ||
| case err != nil: | ||
| return errors.Annotatef(err, "QueryRow failed, sql: %s", selectSQL) | ||
| } | ||
|
|
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| if err := json.Unmarshal([]byte(str), sp); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
|
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| // Save implements checkpoint.Save interface | ||
| func (sp *OracleCheckPoint) Save(ts, secondaryTS int64, consistent bool, version int64) error { | ||
| sp.Lock() | ||
| defer sp.Unlock() | ||
|
|
||
| if sp.closed { | ||
| return errors.Trace(ErrCheckPointClosed) | ||
| } | ||
|
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| sp.CommitTS = ts | ||
| sp.ConsistentSaved = consistent | ||
| if version > sp.Version { | ||
| sp.Version = version | ||
| } | ||
|
|
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| if secondaryTS > 0 { | ||
| sp.TsMap["primary-ts"] = ts | ||
| sp.TsMap["secondary-ts"] = secondaryTS | ||
| } | ||
|
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| b, err := json.Marshal(sp) | ||
| if err != nil { | ||
| return errors.Annotate(err, "json marshal failed") | ||
| } | ||
|
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| sql := genReplaceSQL2o(sp, string(b)) | ||
| return util.RetryContext(context.TODO(), 5, time.Second, 1, func(context.Context) error { | ||
| _, err = sp.db.Exec(sql) | ||
| if err != nil { | ||
| return errors.Annotatef(err, "query sql failed: %s", sql) | ||
| } | ||
| return nil | ||
| }) | ||
| } | ||
|
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| // IsConsistent implements CheckPoint interface | ||
| func (sp *OracleCheckPoint) IsConsistent() bool { | ||
| sp.RLock() | ||
| defer sp.RUnlock() | ||
|
|
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| return sp.ConsistentSaved | ||
| } | ||
|
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| // TS implements CheckPoint.TS interface | ||
| func (sp *OracleCheckPoint) TS() int64 { | ||
| sp.RLock() | ||
| defer sp.RUnlock() | ||
|
|
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| return sp.CommitTS | ||
| } | ||
|
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| // SchemaVersion implements CheckPoint.SchemaVersion interface. | ||
| func (sp *OracleCheckPoint) SchemaVersion() int64 { | ||
| sp.RLock() | ||
| defer sp.RUnlock() | ||
|
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| return sp.Version | ||
| } | ||
|
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| // Close implements CheckPoint.Close interface | ||
| func (sp *OracleCheckPoint) Close() error { | ||
| sp.Lock() | ||
| defer sp.Unlock() | ||
|
|
||
| if sp.closed { | ||
| return errors.Trace(ErrCheckPointClosed) | ||
| } | ||
|
|
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| err := sp.db.Close() | ||
| if err == nil { | ||
| sp.closed = true | ||
| } | ||
| return errors.Trace(err) | ||
| } |
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