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feat(fence): implement fence use datasource proxy (apache#420)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 fence | ||
|
|
||
| import ( | ||
| "context" | ||
| "database/sql" | ||
| "database/sql/driver" | ||
|
|
||
| "github.com/go-sql-driver/mysql" | ||
| "github.com/pkg/errors" | ||
| "github.com/seata/seata-go/pkg/util/log" | ||
| ) | ||
|
|
||
| const ( | ||
| // SeataFenceMySQLDriver MySQL driver for fence | ||
| SeataFenceMySQLDriver = "seata-fence-mysql" | ||
| ) | ||
|
|
||
| func init() { | ||
| sql.Register(SeataFenceMySQLDriver, &FenceDriver{ | ||
| TargetDriver: &mysql.MySQLDriver{}, | ||
| }) | ||
| } | ||
|
|
||
| type FenceDriver struct { | ||
| TargetDriver driver.Driver | ||
| TargetDB *sql.DB | ||
| } | ||
|
|
||
| func (fd *FenceDriver) Open(name string) (driver.Conn, error) { | ||
| return nil, errors.New("operation unsupported") | ||
| } | ||
|
|
||
| func (fd *FenceDriver) OpenConnector(name string) (connector driver.Connector, re error) { | ||
| connector = &dsnConnector{dsn: name, driver: fd.TargetDriver} | ||
| if driverCtx, ok := fd.TargetDriver.(driver.DriverContext); ok { | ||
| connector, re = driverCtx.OpenConnector(name) | ||
| if re != nil { | ||
| log.Errorf("open connector: %w", re) | ||
| return nil, re | ||
| } | ||
| } | ||
|
|
||
| fd.TargetDB = sql.OpenDB(connector) | ||
|
|
||
| return &SeataFenceConnector{ | ||
| TargetConnector: connector, | ||
| TargetDB: fd.TargetDB, | ||
| }, nil | ||
| } | ||
|
|
||
| type dsnConnector struct { | ||
| dsn string | ||
| driver driver.Driver | ||
| } | ||
|
|
||
| func (connector *dsnConnector) Connect(_ context.Context) (driver.Conn, error) { | ||
| return connector.driver.Open(connector.dsn) | ||
| } | ||
|
|
||
| func (connector *dsnConnector) Driver() driver.Driver { | ||
| return connector.driver | ||
| } | ||
|
|
||
| type SeataFenceConnector struct { | ||
| TargetConnector driver.Connector | ||
| TargetDB *sql.DB | ||
| } | ||
|
|
||
| func (connector *SeataFenceConnector) Connect(ctx context.Context) (driver.Conn, error) { | ||
| targetConn, err := connector.TargetConnector.Connect(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &FenceConn{ | ||
| TargetConn: targetConn, | ||
| TargetDB: connector.TargetDB, | ||
| }, nil | ||
| } | ||
|
|
||
| func (connector *SeataFenceConnector) Driver() driver.Driver { | ||
| return connector.TargetConnector.Driver() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,159 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 fence | ||
|
|
||
| import ( | ||
| "context" | ||
| "database/sql" | ||
| "database/sql/driver" | ||
|
|
||
| "github.com/pkg/errors" | ||
| "github.com/seata/seata-go/pkg/tm" | ||
| "github.com/seata/seata-go/pkg/util/log" | ||
| ) | ||
|
|
||
| type FenceConn struct { | ||
| TargetConn driver.Conn | ||
| TargetDB *sql.DB | ||
| } | ||
|
|
||
| func (c *FenceConn) ResetSession(ctx context.Context) error { | ||
| resetter, ok := c.TargetConn.(driver.SessionResetter) | ||
| if !ok { | ||
| return driver.ErrSkip | ||
| } | ||
|
|
||
| return resetter.ResetSession(ctx) | ||
| } | ||
|
|
||
| func (c *FenceConn) Prepare(query string) (driver.Stmt, error) { | ||
| return c.TargetConn.Prepare(query) | ||
| } | ||
|
|
||
| func (c *FenceConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) { | ||
| return c.TargetConn.Prepare(query) | ||
| } | ||
|
|
||
| func (c *FenceConn) Exec(query string, args []driver.Value) (driver.Result, error) { | ||
| execer, ok := c.TargetConn.(driver.Execer) | ||
| if !ok { | ||
| return nil, driver.ErrSkip | ||
| } | ||
|
|
||
| return execer.Exec(query, args) | ||
| } | ||
|
|
||
| func (c *FenceConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) { | ||
| execerContext, ok := c.TargetConn.(driver.ExecerContext) | ||
| if !ok { | ||
| values := make([]driver.Value, 0, len(args)) | ||
| for i := range args { | ||
| values = append(values, args[i].Value) | ||
| } | ||
| return c.Exec(query, values) | ||
| } | ||
|
|
||
| return execerContext.ExecContext(ctx, query, args) | ||
| } | ||
|
|
||
| func (c *FenceConn) Query(query string, args []driver.Value) (driver.Rows, error) { | ||
| queryer, ok := c.TargetConn.(driver.Queryer) | ||
| if !ok { | ||
| return nil, driver.ErrSkip | ||
| } | ||
|
|
||
| return queryer.Query(query, args) | ||
| } | ||
|
|
||
| func (c *FenceConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) { | ||
| QueryerContext, ok := c.TargetConn.(driver.QueryerContext) | ||
| if !ok { | ||
| values := make([]driver.Value, 0, len(args)) | ||
|
|
||
| for i := range args { | ||
| values = append(values, args[i].Value) | ||
| } | ||
|
|
||
| return c.Query(query, values) | ||
| } | ||
|
|
||
| return QueryerContext.QueryContext(ctx, query, args) | ||
| } | ||
|
|
||
| func (c *FenceConn) Begin() (driver.Tx, error) { | ||
| return nil, errors.New("operation unsupport") | ||
| } | ||
|
|
||
| func (c *FenceConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) { | ||
| beginer, ok := c.TargetConn.(driver.ConnBeginTx) | ||
| if !ok { | ||
| return nil, errors.New("operation unsupported") | ||
| } | ||
|
|
||
| tx, err := beginer.BeginTx(ctx, opts) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if !tm.IsSeataContext(ctx) { | ||
| return nil, errors.New("there is not seata context") | ||
| } | ||
|
|
||
| // check if have been begin fence tx | ||
| if tm.IsFenceTxBegin(ctx) { | ||
| return tx, nil | ||
| } | ||
|
|
||
| tm.SetFenceTxBeginedFlag(ctx, true) | ||
|
|
||
| fenceTx, err := c.TargetDB.BeginTx(ctx, &sql.TxOptions{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer func() { | ||
| if err != nil { | ||
| if err := fenceTx.Rollback(); err != nil { | ||
| log.Error(err) | ||
| } | ||
|
|
||
| // although it have not any db operations yet, is still rollback to avoid leak tx. | ||
| if err := tx.Rollback(); err != nil { | ||
| log.Error(err) | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| // do fence operations | ||
| emptyCallback := func() error { | ||
| return nil | ||
| } | ||
|
|
||
| if err := WithFence(ctx, fenceTx, emptyCallback); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &FenceTx{ | ||
| Ctx: ctx, | ||
| TargetTx: tx, | ||
| TargetFenceTx: fenceTx, | ||
| }, nil | ||
| } | ||
|
|
||
| func (c *FenceConn) Close() error { | ||
| return c.TargetConn.Close() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 fence | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| func TestBegin(t *testing.T) { | ||
| tx, err := (&FenceConn{}).Begin() | ||
| assert.NotNil(t, err) | ||
| assert.Nil(t, tx) | ||
| } |
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