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drainer: refactor executor & add self-description pb output (#121)
*: add output self-description protobuf binlog
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| package executor | ||
|
|
||
| import ( | ||
| "github.com/juju/errors" | ||
| ) | ||
|
|
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| // Executor is the interface for execute TiDB binlog's sql | ||
| type Executor interface { | ||
| // Execute executes TiDB binlogs | ||
| Execute([]string, [][]interface{}, []int64, bool) error | ||
| // Close closes the executor | ||
| Close() error | ||
| } | ||
|
|
||
| // New returns the an Executor instance by given name | ||
| func New(name string, cfg *DBConfig) (Executor, error) { | ||
| switch name { | ||
| case "mysql": | ||
| return newMysql(cfg) | ||
| case "pb": | ||
| return newPB(cfg) | ||
| default: | ||
| return nil, errors.Errorf("unsupport executor type %s", name) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package executor | ||
|
|
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| import ( | ||
| "database/sql" | ||
|
|
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| "github.com/juju/errors" | ||
| ) | ||
|
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| type mysqlExecutor struct { | ||
| db *sql.DB | ||
| } | ||
|
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| func newMysql(cfg *DBConfig) (Executor, error) { | ||
| db, err := openDB("mysql", cfg.Host, cfg.Port, cfg.User, cfg.Password) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
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| return &mysqlExecutor{ | ||
| db: db, | ||
| }, nil | ||
| } | ||
|
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| func (m *mysqlExecutor) Execute(sqls []string, args [][]interface{}, commitTSs []int64, isDDL bool) error { | ||
| return executeSQLs(m.db, sqls, args, isDDL) | ||
| } | ||
|
|
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| func (m *mysqlExecutor) Close() error { | ||
| return m.db.Close() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package executor | ||
|
|
||
| import ( | ||
| "github.com/juju/errors" | ||
| "github.com/pingcap/tidb-binlog/pkg/file" | ||
| pb "github.com/pingcap/tidb-binlog/proto/binlog" | ||
| "github.com/pingcap/tidb-binlog/pump" | ||
| ) | ||
|
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| type pbExecutor struct { | ||
| dir string | ||
| binlogger pump.Binlogger | ||
| } | ||
|
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| func newPB(cfg *DBConfig) (Executor, error) { | ||
| var ( | ||
| binlogger pump.Binlogger | ||
| err error | ||
| ) | ||
| dirPath := cfg.BinlogFileDir | ||
| names, err := file.ReadDir(dirPath) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| if len(names) > 0 { | ||
| binlogger, err = pump.OpenBinlogger(dirPath) | ||
| } else { | ||
| binlogger, err = pump.CreateBinlogger(dirPath) | ||
| } | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
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| return &pbExecutor{ | ||
| dir: cfg.BinlogFileDir, | ||
| binlogger: binlogger, | ||
| }, nil | ||
| } | ||
|
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| func (p *pbExecutor) Execute(sqls []string, args [][]interface{}, commitTSs []int64, isDDL bool) error { | ||
| binlog := &pb.Binlog{CommitTs: commitTSs[0]} | ||
| if isDDL { | ||
| binlog.Tp = pb.BinlogType_DDL | ||
| binlog.DdlQuery = []byte(sqls[0]) | ||
| return p.saveBinlog(binlog) | ||
| } | ||
|
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| binlog.Tp = pb.BinlogType_DML | ||
| binlog.DmlData = new(pb.DMLData) | ||
| for i := range sqls { | ||
| // event can be only pb.Event, otherwise need to panic | ||
| event := args[i][0].(*pb.Event) | ||
| binlog.DmlData.Events = append(binlog.DmlData.Events, *event) | ||
| } | ||
| return p.saveBinlog(binlog) | ||
| } | ||
|
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| func (p *pbExecutor) Close() error { | ||
| return p.binlogger.Close() | ||
| } | ||
|
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| func (p *pbExecutor) saveBinlog(binlog *pb.Binlog) error { | ||
| data, err := binlog.Marshal() | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| return p.binlogger.WriteTail(data) | ||
| } |
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