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MySQL frontend connector based on Vitess
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| @@ -1,3 +1,3 @@ | ||
| module quesma/e2e-data-generator | ||
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| go 1.23.2 | ||
| go 1.23.5 |
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| @@ -1,6 +1,6 @@ | ||
| module quesma.com/its | ||
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| go 1.23.2 | ||
| go 1.23.5 | ||
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| require ( | ||
| github.com/ClickHouse/clickhouse-go/v2 v2.20.0 | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,166 @@ | ||
| // Copyright Quesma, licensed under the Elastic License 2.0. | ||
| // SPDX-License-Identifier: Elastic-2.0 | ||
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| // Experimental alpha processor for MySQL protocol | ||
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| package frontend_connectors | ||
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| import ( | ||
| "context" | ||
| "errors" | ||
| "time" | ||
| "vitess.io/vitess/go/mysql" | ||
| "vitess.io/vitess/go/mysql/replication" | ||
| "vitess.io/vitess/go/sqltypes" | ||
| "vitess.io/vitess/go/vt/proto/query" | ||
| "vitess.io/vitess/go/vt/vtenv" | ||
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| "github.com/QuesmaOrg/quesma/quesma/logger" | ||
| "github.com/QuesmaOrg/quesma/quesma/quesma/recovery" | ||
| quesma_api "github.com/QuesmaOrg/quesma/quesma/v2/core" | ||
| ) | ||
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| type VitessMySqlConnector struct { | ||
| processors []quesma_api.Processor | ||
| listener *mysql.Listener | ||
| endpoint string | ||
| } | ||
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| func NewVitessMySqlConnector(endpoint string) (*VitessMySqlConnector, error) { | ||
| connector := VitessMySqlConnector{ | ||
| endpoint: endpoint, | ||
| } | ||
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| // FIXME: the parameter values below should be tweaked, in particular (list not exhaustive): | ||
| // - timeouts, delays are set to time.Second * 0 | ||
| // - authServer is set to mysql.NewAuthServerNone(), meaning no authentication | ||
| // - TLS is not set up | ||
| listener, err := mysql.NewListener("tcp", endpoint, mysql.NewAuthServerNone(), &connector, time.Second*0, time.Second*0, false, false, time.Second*0, time.Second*0) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| connector.listener = listener | ||
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| return &connector, nil | ||
| } | ||
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| func (t *VitessMySqlConnector) Listen() error { | ||
| go func() { | ||
| defer recovery.LogPanic() | ||
| t.listener.Accept() | ||
| }() | ||
| return nil | ||
| } | ||
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| // Implementation of Vitess mysql.Handler interface: | ||
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| type ComQueryMessage struct { | ||
| Conn *mysql.Conn | ||
| Query string | ||
| } | ||
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| func (t *VitessMySqlConnector) NewConnection(c *mysql.Conn) { | ||
| // TODO: should we do something here? | ||
| } | ||
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| func (t *VitessMySqlConnector) ConnectionReady(c *mysql.Conn) { | ||
| // TODO: should we do something here? | ||
| } | ||
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| func (t *VitessMySqlConnector) ConnectionClosed(c *mysql.Conn) { | ||
| // TODO: should we do something here? | ||
| } | ||
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| func (t *VitessMySqlConnector) ComQuery(c *mysql.Conn, query string, callback func(*sqltypes.Result) error) error { | ||
| metadata := make(map[string]interface{}) | ||
| var message any = ComQueryMessage{ | ||
| Conn: c, | ||
| Query: query, | ||
| } | ||
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| dispatcher := quesma_api.Dispatcher{} | ||
| _, result := dispatcher.Dispatch(t.processors, metadata, message) | ||
| switch result := result.(type) { | ||
| case *sqltypes.Result: | ||
| err := callback(result) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| case error: | ||
| return result | ||
| default: | ||
| logger.Error().Msgf("Unexpected ComQuery result type received from the processor: %T", result) | ||
| return nil | ||
| } | ||
| } | ||
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| func (t *VitessMySqlConnector) ComPrepare(c *mysql.Conn, query string, bindVars map[string]*query.BindVariable) ([]*query.Field, error) { | ||
| // TODO implement ComPrepare | ||
| logger.Error().Msg("ComPrepare not implemented") | ||
| return nil, errors.New("ComPrepare not implemented") | ||
| } | ||
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| func (t *VitessMySqlConnector) ComStmtExecute(c *mysql.Conn, prepare *mysql.PrepareData, callback func(*sqltypes.Result) error) error { | ||
| // TODO implement ComStmtExecute | ||
| logger.Error().Msg("ComStmtExecute not implemented") | ||
| return errors.New("ComStmtExecute not implemented") | ||
| } | ||
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| func (t *VitessMySqlConnector) ComRegisterReplica(c *mysql.Conn, replicaHost string, replicaPort uint16, replicaUser string, replicaPassword string) error { | ||
| // TODO implement ComRegisterReplica | ||
| logger.Error().Msg("ComRegisterReplica not implemented") | ||
| return errors.New("ComRegisterReplica not implemented") | ||
| } | ||
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| func (t *VitessMySqlConnector) ComBinlogDump(c *mysql.Conn, logFile string, binlogPos uint32) error { | ||
| // TODO implement ComBinlogDump | ||
| logger.Error().Msg("ComBinlogDump not implemented") | ||
| return errors.New("ComBinlogDump not implemented") | ||
| } | ||
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| func (t *VitessMySqlConnector) ComBinlogDumpGTID(c *mysql.Conn, logFile string, logPos uint64, gtidSet replication.GTIDSet) error { | ||
| // TODO implement ComBinlogDumpGTID | ||
| logger.Error().Msg("ComBinlogDumpGTID not implemented") | ||
| return errors.New("ComBinlogDumpGTID not implemented") | ||
| } | ||
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| func (t *VitessMySqlConnector) WarningCount(c *mysql.Conn) uint16 { | ||
| return 0 | ||
| } | ||
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| func (t *VitessMySqlConnector) ComResetConnection(c *mysql.Conn) { | ||
| // TODO implement ComResetConnection | ||
| logger.Error().Msg("ComResetConnection not implemented") | ||
| } | ||
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| func (t *VitessMySqlConnector) Env() *vtenv.Environment { | ||
| env, err := vtenv.New(vtenv.Options{ | ||
| MySQLServerVersion: "", // will use Vitess's default version | ||
| TruncateUILen: 512, | ||
| TruncateErrLen: 512, | ||
| }) | ||
| if err != nil { | ||
| logger.Error().Msgf("failed to create environment: %v", err) | ||
| return nil | ||
| } | ||
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| return env | ||
| } | ||
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| func (t *VitessMySqlConnector) InstanceName() string { | ||
| return "VitessMySqlConnector" | ||
| } | ||
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| func (t *VitessMySqlConnector) GetEndpoint() string { | ||
| return t.endpoint | ||
| } | ||
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| func (t *VitessMySqlConnector) Stop(ctx context.Context) error { | ||
| t.listener.Shutdown() | ||
| return nil | ||
| } | ||
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| func (t *VitessMySqlConnector) SetHandlers(processors []quesma_api.Processor) { | ||
| t.processors = processors | ||
| } |
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