-
Notifications
You must be signed in to change notification settings - Fork 172
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat: implement sequencer api with mysql (#605)
Co-authored-by: seeflood <zhou.qunli@foxmail.com> Co-authored-by: wenxuwan <wangwx_junction@163.com> Co-authored-by: Xunzhuo <mixdeers@gmail.com>
- Loading branch information
4 people
authored
Jul 18, 2022
1 parent
917485d
commit 2604d62
Showing
11 changed files
with
639 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| // | ||
| // Copyright 2021 Layotto 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 utils | ||
|
|
||
| import ( | ||
| "database/sql" | ||
| "fmt" | ||
| ) | ||
|
|
||
| var ( | ||
| Db *sql.DB | ||
| ) | ||
|
|
||
| const ( | ||
| defaultTableName = "layotto_sequencer" | ||
| defaultTableNameKey = "tableName" | ||
| dataBaseName = "dataBaseName" | ||
| userName = "userName" | ||
| defaultPassword = "password" | ||
| mysqlUrl = "mysqlUrl" | ||
| ) | ||
|
|
||
| type MySQLMetadata struct { | ||
| TableName string | ||
| DataBaseName string | ||
| UserName string | ||
| Password string | ||
| MysqlUrl string | ||
| Db *sql.DB | ||
| } | ||
|
|
||
| func ParseMySQLMetadata(properties map[string]string) (MySQLMetadata, error) { | ||
| m := MySQLMetadata{} | ||
|
|
||
| if val, ok := properties[defaultTableNameKey]; ok && val != "" { | ||
| m.TableName = val | ||
| } | ||
| if val, ok := properties[dataBaseName]; ok && val != "" { | ||
| m.DataBaseName = val | ||
| } | ||
| if val, ok := properties[userName]; ok && val != "" { | ||
| m.UserName = val | ||
| } | ||
| if val, ok := properties[defaultPassword]; ok && val != "" { | ||
| m.Password = val | ||
| } | ||
| if val, ok := properties[mysqlUrl]; ok && val != "" { | ||
| m.MysqlUrl = val | ||
| } | ||
| return m, nil | ||
| } | ||
|
|
||
| func NewMySQLClient(meta MySQLMetadata) error { | ||
|
|
||
| val := meta | ||
| if val.TableName == "" { | ||
| val.TableName = defaultTableName | ||
| } | ||
| meta.Db.Begin() | ||
| createTable := fmt.Sprintf(`CREATE TABLE IF NOT EXISTS %s ( | ||
| sequencer_key VARCHAR(255), | ||
| sequencer_value INT, | ||
| UNIQUE INDEX (sequencer_key));`, val.TableName) | ||
| _, err := meta.Db.Exec(createTable) | ||
| defer meta.Db.Close() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| // | ||
| // Copyright 2021 Layotto 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 mysql | ||
|
|
||
| import ( | ||
| "database/sql" | ||
| "fmt" | ||
|
|
||
| "mosn.io/pkg/log" | ||
|
|
||
| "mosn.io/layotto/components/pkg/utils" | ||
| "mosn.io/layotto/components/sequencer" | ||
| ) | ||
|
|
||
| type MySQLSequencer struct { | ||
| metadata utils.MySQLMetadata | ||
| biggerThan map[string]int64 | ||
| logger log.ErrorLogger | ||
| db *sql.DB | ||
| } | ||
|
|
||
| func NewMySQLSequencer(logger log.ErrorLogger) *MySQLSequencer { | ||
| s := &MySQLSequencer{ | ||
| logger: logger, | ||
| } | ||
|
|
||
| return s | ||
| } | ||
|
|
||
| func (e *MySQLSequencer) Init(config sequencer.Configuration) error { | ||
|
|
||
| m, err := utils.ParseMySQLMetadata(config.Properties) | ||
|
|
||
| if err != nil { | ||
| return err | ||
| } | ||
| e.metadata = m | ||
| e.metadata.Db = e.db | ||
| e.biggerThan = config.BiggerThan | ||
|
|
||
| if err = utils.NewMySQLClient(e.metadata); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if len(e.biggerThan) > 0 { | ||
| var Key string | ||
| var Value int64 | ||
| for k, bt := range e.biggerThan { | ||
| if bt > 0 { | ||
| m.Db.QueryRow(fmt.Sprintf("SELECT sequencer_key,sequencer_value FROM %s WHERE sequencer_key = ?", m.TableName), k).Scan(&Key, &Value) | ||
| if Value < bt { | ||
| return fmt.Errorf("mysql sequencer error: can not satisfy biggerThan guarantee.key: %s,key in MySQL: %s", k, Key) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (e *MySQLSequencer) GetNextId(req *sequencer.GetNextIdRequest) (*sequencer.GetNextIdResponse, error) { | ||
|
|
||
| metadata, err := utils.ParseMySQLMetadata(req.Metadata) | ||
| metadata.Db = e.db | ||
| var Key string | ||
| var Value int64 | ||
| var Version int64 | ||
| var oldVersion int64 | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| begin, err := metadata.Db.Begin() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| err = begin.QueryRow("SELECT sequencer_key, sequencer_value, version FROM ? WHERE sequencer_key = ?", metadata.TableName, req.Key).Scan(&Key, &Value, &oldVersion) | ||
|
|
||
| if err == sql.ErrNoRows { | ||
| Value = 1 | ||
| Version = 1 | ||
| _, err := begin.Exec("INSERT INTO ?(sequencer_key, sequencer_value, version) VALUES(?,?,?)", metadata.TableName, req.Key, Value, Version) | ||
| if err != nil { | ||
| begin.Rollback() | ||
| return nil, err | ||
| } | ||
|
|
||
| } else { | ||
| _, err := begin.Exec("UPDATE ? SET sequencer_value +=1, version += 1 WHERE sequencer_key = ? and version = ?", metadata.TableName, req.Key, oldVersion) | ||
| if err != nil { | ||
| begin.Rollback() | ||
| return nil, err | ||
| } | ||
| } | ||
| defer e.Close(metadata.Db) | ||
|
|
||
| return &sequencer.GetNextIdResponse{ | ||
| NextId: Value, | ||
| }, nil | ||
| } | ||
|
|
||
| func (e *MySQLSequencer) GetSegment(req *sequencer.GetSegmentRequest) (support bool, result *sequencer.GetSegmentResponse, err error) { | ||
|
|
||
| if req.Size == 0 { | ||
| return true, nil, nil | ||
| } | ||
|
|
||
| metadata, err := utils.ParseMySQLMetadata(req.Metadata) | ||
|
|
||
| var Key string | ||
| var Value int64 | ||
| var Version int64 | ||
| var oldVersion int64 | ||
| if err != nil { | ||
| return false, nil, err | ||
| } | ||
|
|
||
| metadata.Db = e.db | ||
|
|
||
| begin, err := metadata.Db.Begin() | ||
| if err != nil { | ||
| return false, nil, err | ||
| } | ||
| err = begin.QueryRow("SELECT sequencer_key, sequencer_value, version FROM ? WHERE sequencer_key == ?", metadata.TableName, req.Key).Scan(&Key, &Value, &oldVersion) | ||
| if err == sql.ErrNoRows { | ||
| Value = int64(req.Size) | ||
| Version = 1 | ||
| _, err := begin.Exec("INSERT INTO ?(sequencer_key, sequencer_value, version) VALUES(?,?,?)", metadata.TableName, req.Key, Value, Version) | ||
| if err != nil { | ||
| begin.Rollback() | ||
| return false, nil, err | ||
| } | ||
|
|
||
| } else { | ||
| Value += int64(req.Size) | ||
| _, err1 := begin.Exec("UPDATE ? SET sequencer_value = ?, version += 1 WHERE sequencer_key = ? AND version = ?", metadata.TableName, Value, req.Key, oldVersion) | ||
| if err1 != nil { | ||
| begin.Rollback() | ||
| return false, nil, err1 | ||
| } | ||
| } | ||
| defer e.Close(metadata.Db) | ||
|
|
||
| return false, &sequencer.GetSegmentResponse{ | ||
| From: Value - int64(req.Size) + 1, | ||
| To: Value, | ||
| }, nil | ||
| } | ||
|
|
||
| func (e *MySQLSequencer) Close(db *sql.DB) error { | ||
|
|
||
| return db.Close() | ||
| } |
Oops, something went wrong.