mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-07-04 08:06:53 +02:00
271 lines
7.4 KiB
Go
271 lines
7.4 KiB
Go
package mysql_store
|
|
|
|
import (
|
|
"database/sql"
|
|
"fmt"
|
|
"hash/crc32"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/filer"
|
|
|
|
_ "github.com/go-sql-driver/mysql"
|
|
)
|
|
|
|
const (
|
|
sqlUrl = "%s:%s@tcp(%s:%d)/%s?charset=utf8"
|
|
default_maxIdleConnections = 100
|
|
default_maxOpenConnections = 50
|
|
default_maxTableNums = 1024
|
|
tableName = "filer_mapping"
|
|
)
|
|
|
|
var (
|
|
_init_db sync.Once
|
|
_db_connections []*sql.DB
|
|
)
|
|
|
|
type MySqlConf struct {
|
|
User string
|
|
Password string
|
|
HostName string
|
|
Port int
|
|
DataBase string
|
|
MaxIdleConnections int
|
|
MaxOpenConnections int
|
|
}
|
|
|
|
type ShardingConf struct {
|
|
IsSharding bool `json:"isSharding"`
|
|
ShardCount int `json:"shardCount"`
|
|
}
|
|
|
|
type MySqlStore struct {
|
|
dbs []*sql.DB
|
|
isSharding bool
|
|
shardCount int
|
|
}
|
|
|
|
func getDbConnection(confs []MySqlConf) []*sql.DB {
|
|
_init_db.Do(func() {
|
|
for _, conf := range confs {
|
|
|
|
sqlUrl := fmt.Sprintf(sqlUrl, conf.User, conf.Password, conf.HostName, conf.Port, conf.DataBase)
|
|
var dbErr error
|
|
_db_connection, dbErr := sql.Open("mysql", sqlUrl)
|
|
if dbErr != nil {
|
|
_db_connection.Close()
|
|
_db_connection = nil
|
|
panic(dbErr)
|
|
}
|
|
var maxIdleConnections, maxOpenConnections int
|
|
|
|
if conf.MaxIdleConnections != 0 {
|
|
maxIdleConnections = conf.MaxIdleConnections
|
|
} else {
|
|
maxIdleConnections = default_maxIdleConnections
|
|
}
|
|
if conf.MaxOpenConnections != 0 {
|
|
maxOpenConnections = conf.MaxOpenConnections
|
|
} else {
|
|
maxOpenConnections = default_maxOpenConnections
|
|
}
|
|
|
|
_db_connection.SetMaxIdleConns(maxIdleConnections)
|
|
_db_connection.SetMaxOpenConns(maxOpenConnections)
|
|
_db_connections = append(_db_connections, _db_connection)
|
|
}
|
|
})
|
|
return _db_connections
|
|
}
|
|
|
|
func NewMysqlStore(confs []MySqlConf, isSharding bool, shardCount int) *MySqlStore {
|
|
ms := &MySqlStore{
|
|
dbs: getDbConnection(confs),
|
|
isSharding: isSharding,
|
|
shardCount: shardCount,
|
|
}
|
|
|
|
for _, db := range ms.dbs {
|
|
if !isSharding {
|
|
ms.shardCount = 1
|
|
} else {
|
|
if ms.shardCount == 0 {
|
|
ms.shardCount = default_maxTableNums
|
|
}
|
|
}
|
|
for i := 0; i < ms.shardCount; i++ {
|
|
if err := ms.createTables(db, tableName, i); err != nil {
|
|
fmt.Printf("create table failed %v", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
return ms
|
|
}
|
|
|
|
func (s *MySqlStore) hash(fullFileName string) (instance_offset, table_postfix int) {
|
|
hash_value := crc32.ChecksumIEEE([]byte(fullFileName))
|
|
instance_offset = int(hash_value) % len(s.dbs)
|
|
table_postfix = int(hash_value) % s.shardCount
|
|
return
|
|
}
|
|
|
|
func (s *MySqlStore) parseFilerMappingInfo(path string) (instanceId int, tableFullName string, err error) {
|
|
instance_offset, table_postfix := s.hash(path)
|
|
instanceId = instance_offset
|
|
if s.isSharding {
|
|
tableFullName = fmt.Sprintf("%s_%04d", tableName, table_postfix)
|
|
} else {
|
|
tableFullName = tableName
|
|
}
|
|
return
|
|
}
|
|
|
|
func (s *MySqlStore) Get(fullFilePath string) (fid string, err error) {
|
|
instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
|
|
if err != nil {
|
|
return "", fmt.Errorf("MySqlStore Get operation can not parse file path %s: err is %v", fullFilePath, err)
|
|
}
|
|
fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName)
|
|
if err == sql.ErrNoRows {
|
|
//Could not found
|
|
err = filer.ErrNotFound
|
|
}
|
|
return fid, err
|
|
}
|
|
|
|
func (s *MySqlStore) Put(fullFilePath string, fid string) (err error) {
|
|
var tableFullName string
|
|
|
|
instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
|
|
if err != nil {
|
|
return fmt.Errorf("MySqlStore Put operation can not parse file path %s: err is %v", fullFilePath, err)
|
|
}
|
|
var old_fid string
|
|
if old_fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil && err != sql.ErrNoRows {
|
|
return fmt.Errorf("MySqlStore Put operation failed when querying path %s: err is %v", fullFilePath, err)
|
|
} else {
|
|
if len(old_fid) == 0 {
|
|
err = s.insert(fullFilePath, fid, s.dbs[instance_offset], tableFullName)
|
|
err = fmt.Errorf("MySqlStore Put operation failed when inserting path %s with fid %s : err is %v", fullFilePath, fid, err)
|
|
} else {
|
|
err = s.update(fullFilePath, fid, s.dbs[instance_offset], tableFullName)
|
|
err = fmt.Errorf("MySqlStore Put operation failed when updating path %s with fid %s : err is %v", fullFilePath, fid, err)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (s *MySqlStore) Delete(fullFilePath string) (err error) {
|
|
var fid string
|
|
instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
|
|
if err != nil {
|
|
return fmt.Errorf("MySqlStore Delete operation can not parse file path %s: err is %v", fullFilePath, err)
|
|
}
|
|
if fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil {
|
|
return fmt.Errorf("MySqlStore Delete operation failed when querying path %s: err is %v", fullFilePath, err)
|
|
} else if fid == "" {
|
|
return nil
|
|
}
|
|
if err = s.delete(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil {
|
|
return fmt.Errorf("MySqlStore Delete operation failed when deleting path %s: err is %v", fullFilePath, err)
|
|
} else {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func (s *MySqlStore) Close() {
|
|
for _, db := range s.dbs {
|
|
db.Close()
|
|
}
|
|
}
|
|
|
|
var createTable = `
|
|
CREATE TABLE IF NOT EXISTS %s (
|
|
id bigint(20) NOT NULL AUTO_INCREMENT,
|
|
uriPath char(256) NOT NULL DEFAULT "" COMMENT 'http uriPath',
|
|
fid char(36) NOT NULL DEFAULT "" COMMENT 'seaweedfs fid',
|
|
createTime int(10) NOT NULL DEFAULT 0 COMMENT 'createdTime in unix timestamp',
|
|
updateTime int(10) NOT NULL DEFAULT 0 COMMENT 'updatedTime in unix timestamp',
|
|
remark varchar(20) NOT NULL DEFAULT "" COMMENT 'reserverd field',
|
|
status tinyint(2) DEFAULT '1' COMMENT 'resource status',
|
|
PRIMARY KEY (id),
|
|
UNIQUE KEY index_uriPath (uriPath)
|
|
) DEFAULT CHARSET=utf8;
|
|
`
|
|
|
|
func (s *MySqlStore) createTables(db *sql.DB, tableName string, postfix int) error {
|
|
var realTableName string
|
|
if s.isSharding {
|
|
realTableName = fmt.Sprintf("%s_%4d", tableName, postfix)
|
|
} else {
|
|
realTableName = tableName
|
|
}
|
|
|
|
stmt, err := db.Prepare(fmt.Sprintf(createTable, realTableName))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *MySqlStore) query(uriPath string, db *sql.DB, tableName string) (string, error) {
|
|
sqlStatement := "SELECT fid FROM %s WHERE uriPath=?"
|
|
row := db.QueryRow(fmt.Sprintf(sqlStatement, tableName), uriPath)
|
|
var fid string
|
|
err := row.Scan(&fid)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return fid, nil
|
|
}
|
|
|
|
func (s *MySqlStore) update(uriPath string, fid string, db *sql.DB, tableName string) error {
|
|
sqlStatement := "UPDATE %s SET fid=?, updateTime=? WHERE uriPath=?"
|
|
res, err := db.Exec(fmt.Sprintf(sqlStatement, tableName), fid, time.Now().Unix(), uriPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = res.RowsAffected()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *MySqlStore) insert(uriPath string, fid string, db *sql.DB, tableName string) error {
|
|
sqlStatement := "INSERT INTO %s (uriPath,fid,createTime) VALUES(?,?,?)"
|
|
res, err := db.Exec(fmt.Sprintf(sqlStatement, tableName), uriPath, fid, time.Now().Unix())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = res.RowsAffected()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *MySqlStore) delete(uriPath string, db *sql.DB, tableName string) error {
|
|
sqlStatement := "DELETE FROM %s WHERE uriPath=?"
|
|
res, err := db.Exec(fmt.Sprintf(sqlStatement, tableName), uriPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = res.RowsAffected()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|