mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-06-15 23:22:05 +02:00
Updating PostgreSQL file store integration to support directories.
This commit is contained in:
Mike Tolman
parent
e88795be13
commit
43e655afc8
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@ -2,26 +2,30 @@ package postgres_store
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import (
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"database/sql"
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"errors"
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"fmt"
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"hash/crc32"
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"path/filepath"
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"sync"
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"time"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/glog"
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_ "github.com/lib/pq"
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_ "path/filepath"
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"strings"
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)
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const (
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default_maxIdleConnections = 100
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default_maxOpenConnections = 50
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default_maxTableNums = 1024
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tableName = "filer_mapping"
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filesTableName = "files"
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directoriesTableName = "directories"
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)
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var (
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_init_db sync.Once
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_db_connections []*sql.DB
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_init_db sync.Once
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_db_connection *sql.DB
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)
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type PostgresConf struct {
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@ -30,27 +34,60 @@ type PostgresConf struct {
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HostName string
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Port int
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DataBase string
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SslMode string
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SslMode string
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MaxIdleConnections int
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MaxOpenConnections int
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}
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type ShardingConf struct {
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IsSharding bool `json:"isSharding"`
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ShardCount int `json:"shardCount"`
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}
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type PostgresStore struct {
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dbs []*sql.DB
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isSharding bool
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shardCount int
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server string
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user string
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db *sql.DB
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server string
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user string
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password string
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}
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func (s *PostgresStore) CreateFile(fullFileName string, fid string) (err error) {
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glog.V(3).Infoln("Calling posgres_store CreateFile")
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return s.Put(fullFileName, fid)
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}
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func (s *PostgresStore) FindFile(fullFileName string) (fid string, err error) {
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glog.V(3).Infoln("Calling posgres_store FindFile")
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return s.Get(fullFileName)
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}
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func (s *PostgresStore) DeleteFile(fullFileName string) (fid string, err error) {
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glog.V(3).Infoln("Calling posgres_store DeleteFile")
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return "", s.Delete(fullFileName)
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}
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func (s *PostgresStore) FindDirectory(dirPath string) (dirId filer.DirectoryId, err error) {
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glog.V(3).Infoln("Calling posgres_store FindDirectory")
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return s.FindDir(dirPath)
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}
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func (s *PostgresStore) ListDirectories(dirPath string) (dirs []filer.DirectoryEntry, err error) {
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glog.V(3).Infoln("Calling posgres_store ListDirectories")
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return s.ListDirs(dirPath)
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}
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func (s *PostgresStore) ListFiles(dirPath string, lastFileName string, limit int) (files []filer.FileEntry, err error) {
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glog.V(3).Infoln("Calling posgres_store ListFiles")
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return s.FindFiles(dirPath, lastFileName, limit)
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}
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func (s *PostgresStore) DeleteDirectory(dirPath string, recursive bool) (err error) {
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glog.V(3).Infoln("Calling posgres_store DeleteDirectory")
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return s.DeleteDir(dirPath, recursive)
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}
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func (s *PostgresStore) Move(fromPath string, toPath string) (err error) {
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glog.V(3).Infoln("Calling posgres_store Move")
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return errors.New("Move is not yet implemented for the PostgreSQL store.")
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}
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func databaseExists(db *sql.DB, databaseName string) (bool, error) {
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sqlStatement := "SELECT datname from pg_database WHERE datname='%s'"
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sqlStatement := "SELECT datname from pg_database WHERE datname='%s'"
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row := db.QueryRow(fmt.Sprintf(sqlStatement, databaseName))
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var dbName string
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@ -64,164 +101,126 @@ func databaseExists(db *sql.DB, databaseName string) (bool, error) {
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return true, nil
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}
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func createDatabase(db *sql.DB, databaseName string) (error) {
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sqlStatement := "CREATE DATABASE %s ENCODING='UTF8'";
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func createDatabase(db *sql.DB, databaseName string) error {
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sqlStatement := "CREATE DATABASE %s ENCODING='UTF8'"
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_, err := db.Exec(fmt.Sprintf(sqlStatement, databaseName))
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return err
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}
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func getDbConnection(confs []PostgresConf) []*sql.DB {
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func getDbConnection(conf PostgresConf) *sql.DB {
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_init_db.Do(func() {
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for _, conf := range confs {
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sqlUrl := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s connect_timeout=30", conf.HostName, conf.Port, conf.User, conf.Password, "postgres", conf.SslMode)
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glog.V(3).Infoln("Opening postgres master database")
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var dbErr error
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_db_connection, dbErr := sql.Open("postgres", sqlUrl)
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if dbErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(dbErr)
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}
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pingErr := _db_connection.Ping()
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if pingErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(pingErr)
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}
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glog.V(3).Infoln("Checking to see if DB exists: ", conf.DataBase)
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var existsErr error
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dbExists, existsErr := databaseExists(_db_connection, conf.DataBase)
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if existsErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(existsErr)
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}
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if !dbExists {
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glog.V(3).Infoln("Database doesn't exist. Attempting to create one: ", conf.DataBase)
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createErr := createDatabase(_db_connection, conf.DataBase)
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if createErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(createErr)
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}
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}
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glog.V(3).Infoln("Closing master postgres database and opening configured database: ", conf.DataBase)
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sqlUrl := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s connect_timeout=30", conf.HostName, conf.Port, conf.User, conf.Password, "postgres", conf.SslMode)
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glog.V(3).Infoln("Opening postgres master database")
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var dbErr error
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_db_connection, dbErr := sql.Open("postgres", sqlUrl)
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if dbErr != nil {
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_db_connection.Close()
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_db_connection = nil
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sqlUrl = fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s connect_timeout=30", conf.HostName, conf.Port, conf.User, conf.Password, conf.DataBase, conf.SslMode)
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_db_connection, dbErr = sql.Open("postgres", sqlUrl)
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if dbErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(dbErr)
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}
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pingErr = _db_connection.Ping()
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if pingErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(pingErr)
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}
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var maxIdleConnections, maxOpenConnections int
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if conf.MaxIdleConnections != 0 {
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maxIdleConnections = conf.MaxIdleConnections
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} else {
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maxIdleConnections = default_maxIdleConnections
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}
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if conf.MaxOpenConnections != 0 {
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maxOpenConnections = conf.MaxOpenConnections
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} else {
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maxOpenConnections = default_maxOpenConnections
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}
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_db_connection.SetMaxIdleConns(maxIdleConnections)
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_db_connection.SetMaxOpenConns(maxOpenConnections)
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_db_connections = append(_db_connections, _db_connection)
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panic(dbErr)
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}
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pingErr := _db_connection.Ping()
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if pingErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(pingErr)
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}
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glog.V(3).Infoln("Checking to see if DB exists: ", conf.DataBase)
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var existsErr error
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dbExists, existsErr := databaseExists(_db_connection, conf.DataBase)
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if existsErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(existsErr)
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}
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if !dbExists {
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glog.V(3).Infoln("Database doesn't exist. Attempting to create one: ", conf.DataBase)
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createErr := createDatabase(_db_connection, conf.DataBase)
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if createErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(createErr)
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}
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}
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glog.V(3).Infoln("Closing master postgres database and opening configured database: ", conf.DataBase)
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_db_connection.Close()
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_db_connection = nil
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sqlUrl = fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s connect_timeout=30", conf.HostName, conf.Port, conf.User, conf.Password, conf.DataBase, conf.SslMode)
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_db_connection, dbErr = sql.Open("postgres", sqlUrl)
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if dbErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(dbErr)
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}
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pingErr = _db_connection.Ping()
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if pingErr != nil {
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_db_connection.Close()
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_db_connection = nil
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panic(pingErr)
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}
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var maxIdleConnections, maxOpenConnections int
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if conf.MaxIdleConnections != 0 {
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maxIdleConnections = conf.MaxIdleConnections
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} else {
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maxIdleConnections = default_maxIdleConnections
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}
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if conf.MaxOpenConnections != 0 {
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maxOpenConnections = conf.MaxOpenConnections
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} else {
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maxOpenConnections = default_maxOpenConnections
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}
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_db_connection.SetMaxIdleConns(maxIdleConnections)
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_db_connection.SetMaxOpenConns(maxOpenConnections)
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})
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return _db_connections
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return _db_connection
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}
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func NewPostgresStore(confs []PostgresConf, isSharding bool, shardCount int) *PostgresStore {
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//func NewPostgresStore(master string, confs []PostgresConf, isSharding bool, shardCount int) *PostgresStore {
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func NewPostgresStore(master string, conf PostgresConf) *PostgresStore {
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pg := &PostgresStore{
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dbs: getDbConnection(confs),
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isSharding: isSharding,
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shardCount: shardCount,
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db: getDbConnection(conf),
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}
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for _, db := range pg.dbs {
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if !isSharding {
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pg.shardCount = 1
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} else {
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if pg.shardCount == 0 {
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pg.shardCount = default_maxTableNums
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}
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}
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for i := 0; i < pg.shardCount; i++ {
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if err := pg.createTables(db, tableName, i); err != nil {
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fmt.Printf("create table failed %v", err)
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}
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}
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pg.createDirectoriesTable()
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if err := pg.createFilesTable(); err != nil {
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fmt.Printf("create table failed %v", err)
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}
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return pg
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}
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func (s *PostgresStore) hash(fullFileName string) (instance_offset, table_postfix int) {
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hash_value := crc32.ChecksumIEEE([]byte(fullFileName))
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instance_offset = int(hash_value) % len(s.dbs)
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table_postfix = int(hash_value) % s.shardCount
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return
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}
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func (s *PostgresStore) parseFilerMappingInfo(path string) (instanceId int, tableFullName string, err error) {
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instance_offset, table_postfix := s.hash(path)
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instanceId = instance_offset
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if s.isSharding {
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tableFullName = fmt.Sprintf("%s_%04d", tableName, table_postfix)
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} else {
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tableFullName = tableName
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}
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return
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}
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func (s *PostgresStore) Get(fullFilePath string) (fid string, err error) {
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instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
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if err != nil {
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return "", fmt.Errorf("PostgresStore Get operation can not parse file path %s: err is %v", fullFilePath, err)
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}
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fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName)
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fid, err = s.query(fullFilePath)
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return fid, err
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}
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func (s *PostgresStore) Put(fullFilePath string, fid string) (err error) {
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var tableFullName string
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instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
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if err != nil {
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return fmt.Errorf("PostgresStore Put operation can not parse file path %s: err is %v", fullFilePath, err)
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}
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var old_fid string
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if old_fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil && err != sql.ErrNoRows {
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if old_fid, err = s.query(fullFilePath); err != nil && err != sql.ErrNoRows {
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return fmt.Errorf("PostgresStore Put operation failed when querying path %s: err is %v", fullFilePath, err)
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} else {
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if len(old_fid) == 0 {
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err = s.insert(fullFilePath, fid, s.dbs[instance_offset], tableFullName)
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err = s.insert(fullFilePath, fid)
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if err != nil {
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return fmt.Errorf("PostgresStore Put operation failed when inserting path %s with fid %s : err is %v", fullFilePath, fid, err)
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}
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} else {
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err = s.update(fullFilePath, fid, s.dbs[instance_offset], tableFullName)
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err = s.update(fullFilePath, fid)
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if err != nil {
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return fmt.Errorf("PostgresStore Put operation failed when updating path %s with fid %s : err is %v", fullFilePath, fid, err)
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}
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@ -232,16 +231,15 @@ func (s *PostgresStore) Put(fullFilePath string, fid string) (err error) {
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func (s *PostgresStore) Delete(fullFilePath string) (err error) {
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var fid string
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instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
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if err != nil {
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return fmt.Errorf("PostgresStore Delete operation can not parse file path %s: err is %v", fullFilePath, err)
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}
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if fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil {
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if fid, err = s.query(fullFilePath); err != nil {
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return fmt.Errorf("PostgresStore Delete operation failed when querying path %s: err is %v", fullFilePath, err)
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} else if fid == "" {
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return nil
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}
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if err = s.delete(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil {
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if err = s.delete(fullFilePath); err != nil {
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return fmt.Errorf("PostgresStore Delete operation failed when deleting path %s: err is %v", fullFilePath, err)
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} else {
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return nil
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@ -249,39 +247,68 @@ func (s *PostgresStore) Delete(fullFilePath string) (err error) {
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}
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func (s *PostgresStore) Close() {
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for _, db := range s.dbs {
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db.Close()
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}
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s.db.Close()
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}
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var createTable = `
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func (s *PostgresStore) FindDir(dirPath string) (dirId filer.DirectoryId, err error) {
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dirId, _, err = s.lookupDirectory(dirPath)
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return dirId, err
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}
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func (s *PostgresStore) ListDirs(dirPath string) (dirs []filer.DirectoryEntry, err error) {
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dirs, err = s.findDirectories(dirPath, 20)
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glog.V(3).Infof("Postgres ListDirs = found %d directories under %s", len(dirs), dirPath)
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return dirs, err
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}
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func (s *PostgresStore) DeleteDir(dirPath string, recursive bool) (err error) {
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err = s.deleteDirectory(dirPath, recursive)
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if err != nil {
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glog.V(0).Infof("Error in Postgres DeleteDir '%s' (recursive = '%t'): %s", err)
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}
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return err
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}
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func (s *PostgresStore) FindFiles(dirPath string, lastFileName string, limit int) (files []filer.FileEntry, err error) {
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files, err = s.findFiles(dirPath, lastFileName, limit)
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return files, err
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}
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var createDirectoryTable = `
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CREATE TABLE IF NOT EXISTS %s (
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id BIGSERIAL NOT NULL,
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uriPath VARCHAR(1024) NOT NULL DEFAULT '',
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directoryRoot VARCHAR(1024) NOT NULL DEFAULT '',
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directoryName VARCHAR(1024) NOT NULL DEFAULT '',
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CONSTRAINT unique_directory UNIQUE (directoryRoot, directoryName)
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);
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`
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var createFileTable = `
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CREATE TABLE IF NOT EXISTS %s (
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id BIGSERIAL NOT NULL,
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directoryPart VARCHAR(1024) NOT NULL DEFAULT '',
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filePart VARCHAR(1024) NOT NULL DEFAULT '',
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fid VARCHAR(36) NOT NULL DEFAULT '',
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createTime BIGINT NOT NULL DEFAULT 0,
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updateTime BIGINT NOT NULL DEFAULT 0,
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remark VARCHAR(20) NOT NULL DEFAULT '',
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status SMALLINT NOT NULL DEFAULT '1',
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PRIMARY KEY (id),
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CONSTRAINT %s_index_uriPath UNIQUE (uriPath)
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CONSTRAINT %s_unique_file UNIQUE (directoryPart, filePart)
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);
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`
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func (s *PostgresStore) createTables(db *sql.DB, tableName string, postfix int) error {
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var realTableName string
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if s.isSharding {
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realTableName = fmt.Sprintf("%s_%04d", tableName, postfix)
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} else {
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realTableName = tableName
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}
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glog.V(3).Infoln("Creating postgres table if it doesn't exist: ", realTableName)
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sqlCreate := fmt.Sprintf(createTable, realTableName, realTableName)
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|
||||
stmt, err := db.Prepare(sqlCreate)
|
||||
func (s *PostgresStore) createDirectoriesTable() error {
|
||||
glog.V(3).Infoln("Creating postgres table if it doesn't exist: ", directoriesTableName)
|
||||
|
||||
sqlCreate := fmt.Sprintf(createDirectoryTable, directoriesTableName)
|
||||
|
||||
stmt, err := s.db.Prepare(sqlCreate)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
@ -294,27 +321,48 @@ func (s *PostgresStore) createTables(db *sql.DB, tableName string, postfix int)
|
|||
return nil
|
||||
}
|
||||
|
||||
func (s *PostgresStore) query(uriPath string, db *sql.DB, tableName string) (string, error) {
|
||||
sqlStatement := fmt.Sprintf("SELECT fid FROM %s WHERE uriPath=$1", tableName)
|
||||
|
||||
row := db.QueryRow(sqlStatement, uriPath)
|
||||
func (s *PostgresStore) createFilesTable() error {
|
||||
|
||||
glog.V(3).Infoln("Creating postgres table if it doesn't exist: ", filesTableName)
|
||||
|
||||
sqlCreate := fmt.Sprintf(createFileTable, filesTableName, filesTableName)
|
||||
|
||||
stmt, err := s.db.Prepare(sqlCreate)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer stmt.Close()
|
||||
|
||||
_, err = stmt.Exec()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *PostgresStore) query(uriPath string) (string, error) {
|
||||
directoryPart, filePart := filepath.Split(uriPath)
|
||||
sqlStatement := fmt.Sprintf("SELECT fid FROM %s WHERE directoryPart=$1 AND filePart=$2", filesTableName)
|
||||
|
||||
row := s.db.QueryRow(sqlStatement, directoryPart, filePart)
|
||||
var fid string
|
||||
err := row.Scan(&fid)
|
||||
|
||||
|
||||
glog.V(3).Infof("Postgres query -- looking up path '%s' and found id '%s' ", uriPath, fid)
|
||||
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
return fid, nil
|
||||
}
|
||||
|
||||
func (s *PostgresStore) update(uriPath string, fid string, db *sql.DB, tableName string) error {
|
||||
sqlStatement := fmt.Sprintf("UPDATE %s SET fid=$1, updateTime=$2 WHERE uriPath=$3", tableName)
|
||||
|
||||
func (s *PostgresStore) update(uriPath string, fid string) error {
|
||||
directoryPart, filePart := filepath.Split(uriPath)
|
||||
sqlStatement := fmt.Sprintf("UPDATE %s SET fid=$1, updateTime=$2 WHERE directoryPart=$3 AND filePart=$4", filesTableName)
|
||||
|
||||
glog.V(3).Infof("Postgres query -- updating path '%s' with id '%s'", uriPath, fid)
|
||||
|
||||
res, err := db.Exec(sqlStatement, fid, time.Now().Unix(), uriPath)
|
||||
|
||||
res, err := s.db.Exec(sqlStatement, fid, time.Now().Unix(), directoryPart, filePart)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
@ -326,33 +374,83 @@ func (s *PostgresStore) update(uriPath string, fid string, db *sql.DB, tableName
|
|||
return nil
|
||||
}
|
||||
|
||||
func (s *PostgresStore) insert(uriPath string, fid string, db *sql.DB, tableName string) error {
|
||||
sqlStatement := fmt.Sprintf("INSERT INTO %s (uriPath,fid,createTime) VALUES($1, $2, $3)", tableName)
|
||||
|
||||
func (s *PostgresStore) insert(uriPath string, fid string) error {
|
||||
directoryPart, filePart := filepath.Split(uriPath)
|
||||
|
||||
existingId, _, _ := s.lookupDirectory(directoryPart)
|
||||
if existingId == 0 {
|
||||
s.recursiveInsertDirectory(directoryPart)
|
||||
}
|
||||
|
||||
sqlStatement := fmt.Sprintf("INSERT INTO %s (directoryPart,filePart,fid,createTime) VALUES($1, $2, $3, $4)", filesTableName)
|
||||
glog.V(3).Infof("Postgres query -- inserting path '%s' with id '%s'", uriPath, fid)
|
||||
|
||||
res, err := db.Exec(sqlStatement, uriPath, fid, time.Now().Unix())
|
||||
|
||||
|
||||
res, err := s.db.Exec(sqlStatement, directoryPart, filePart, fid, time.Now().Unix())
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
rows, err := res.RowsAffected()
|
||||
rows, err := res.RowsAffected()
|
||||
if rows != 1 {
|
||||
return fmt.Errorf("Postgres insert -- rows affected = %d. Expecting 1", rows)
|
||||
}
|
||||
}
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *PostgresStore) delete(uriPath string, db *sql.DB, tableName string) error {
|
||||
sqlStatement := fmt.Sprintf("DELETE FROM %s WHERE uriPath=$1", tableName)
|
||||
|
||||
func (s *PostgresStore) recursiveInsertDirectory(dirPath string) {
|
||||
pathParts := strings.Split(dirPath, "/")
|
||||
|
||||
var workingPath string = "/"
|
||||
for _, part := range pathParts {
|
||||
if part == "" {
|
||||
continue
|
||||
}
|
||||
workingPath += (part + "/")
|
||||
existingId, _, _ := s.lookupDirectory(workingPath)
|
||||
if existingId == 0 {
|
||||
s.insertDirectory(workingPath)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *PostgresStore) insertDirectory(dirPath string) {
|
||||
pathParts := strings.Split(dirPath, "/")
|
||||
|
||||
directoryRoot := "/"
|
||||
directoryName := ""
|
||||
if len(pathParts) > 1 {
|
||||
directoryRoot = strings.Join(pathParts[0:len(pathParts)-2], "/") + "/"
|
||||
directoryName = strings.Join(pathParts[len(pathParts)-2:], "/")
|
||||
} else if len(pathParts) == 1 {
|
||||
directoryRoot = "/"
|
||||
directoryName = pathParts[0] + "/"
|
||||
}
|
||||
sqlInsertDirectoryStatement := fmt.Sprintf("INSERT INTO %s (directoryroot, directoryname) "+
|
||||
"SELECT $1, $2 WHERE NOT EXISTS ( SELECT id FROM %s WHERE directoryroot=$3 AND directoryname=$4 )",
|
||||
directoriesTableName, directoriesTableName)
|
||||
|
||||
glog.V(4).Infof("Postgres query -- Inserting directory (if it doesn't exist) - root = %s, name = %s",
|
||||
directoryRoot, directoryName)
|
||||
|
||||
_, err := s.db.Exec(sqlInsertDirectoryStatement, directoryRoot, directoryName, directoryRoot, directoryName)
|
||||
if err != nil {
|
||||
glog.V(0).Infof("Postgres query -- Error inserting directory - root = %s, name = %s: %s",
|
||||
directoryRoot, directoryName, err)
|
||||
}
|
||||
}
|
||||
|
||||
func (s *PostgresStore) delete(uriPath string) error {
|
||||
directoryPart, filePart := filepath.Split(uriPath)
|
||||
sqlStatement := fmt.Sprintf("DELETE FROM %s WHERE directoryPart=$1 AND filePart=$2", filesTableName)
|
||||
|
||||
glog.V(3).Infof("Postgres query -- deleting path '%s'", uriPath)
|
||||
|
||||
res, err := db.Exec(sqlStatement, uriPath)
|
||||
|
||||
res, err := s.db.Exec(sqlStatement, directoryPart, filePart)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
@ -362,4 +460,164 @@ func (s *PostgresStore) delete(uriPath string, db *sql.DB, tableName string) err
|
|||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
func (s *PostgresStore) lookupDirectory(dirPath string) (filer.DirectoryId, string, error) {
|
||||
directoryRoot, directoryName := s.mySplitPath(dirPath)
|
||||
|
||||
sqlStatement := fmt.Sprintf("SELECT id, directoryroot, directoryname FROM %s WHERE directoryRoot=$1 AND directoryName=$2", directoriesTableName)
|
||||
|
||||
row := s.db.QueryRow(sqlStatement, directoryRoot, directoryName)
|
||||
var id filer.DirectoryId
|
||||
var dirRoot string
|
||||
var dirName string
|
||||
err := row.Scan(&id, &dirRoot, &dirName)
|
||||
|
||||
glog.V(3).Infof("Postgres lookupDirectory -- looking up directory '%s' and found id '%d', root '%s', name '%s' ", dirPath, id, dirRoot, dirName)
|
||||
|
||||
if err != nil {
|
||||
return 0, "", err
|
||||
}
|
||||
return id, filepath.Join(dirRoot, dirName), err
|
||||
}
|
||||
|
||||
func (s *PostgresStore) findDirectories(dirPath string, limit int) (dirs []filer.DirectoryEntry, err error) {
|
||||
sqlStatement := fmt.Sprintf("SELECT id, directoryroot, directoryname FROM %s WHERE directoryRoot=$1 AND directoryName != '' ORDER BY id LIMIT $2", directoriesTableName)
|
||||
rows, err := s.db.Query(sqlStatement, dirPath, limit)
|
||||
|
||||
if err != nil {
|
||||
glog.V(0).Infof("Postgres findDirectories error: %s", err)
|
||||
}
|
||||
|
||||
if rows != nil {
|
||||
defer rows.Close()
|
||||
for rows.Next() {
|
||||
var id filer.DirectoryId
|
||||
var directoryRoot string
|
||||
var directoryName string
|
||||
|
||||
scanErr := rows.Scan(&id, &directoryRoot, &directoryName)
|
||||
if scanErr != nil {
|
||||
err = scanErr
|
||||
}
|
||||
dirs = append(dirs, filer.DirectoryEntry{Name: (directoryName), Id: id})
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (s *PostgresStore) safeToDeleteDirectory(dirPath string, recursive bool) bool {
|
||||
if recursive {
|
||||
return true
|
||||
}
|
||||
sqlStatement := fmt.Sprintf("SELECT id FROM %s WHERE directoryRoot LIKE $1 LIMIT 1", directoriesTableName)
|
||||
row := s.db.QueryRow(sqlStatement, dirPath+"%")
|
||||
|
||||
var id filer.DirectoryId
|
||||
err := row.Scan(&id)
|
||||
if err != nil {
|
||||
if err == sql.ErrNoRows {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (s *PostgresStore) mySplitPath(dirPath string) (directoryRoot string, directoryName string) {
|
||||
pathParts := strings.Split(dirPath, "/")
|
||||
directoryRoot = "/"
|
||||
directoryName = ""
|
||||
if len(pathParts) > 1 {
|
||||
directoryRoot = strings.Join(pathParts[0:len(pathParts)-2], "/") + "/"
|
||||
directoryName = strings.Join(pathParts[len(pathParts)-2:], "/")
|
||||
} else if len(pathParts) == 1 {
|
||||
directoryRoot = "/"
|
||||
directoryName = pathParts[0] + "/"
|
||||
}
|
||||
return directoryRoot, directoryName
|
||||
}
|
||||
|
||||
func (s *PostgresStore) deleteDirectory(dirPath string, recursive bool) (err error) {
|
||||
directoryRoot, directoryName := s.mySplitPath(dirPath)
|
||||
|
||||
// delete files
|
||||
sqlStatement := fmt.Sprintf("DELETE FROM %s WHERE directorypart=$1", filesTableName)
|
||||
_, err = s.db.Exec(sqlStatement, dirPath)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// delete specific directory if it is empty or recursive delete was requested
|
||||
safeToDelete := s.safeToDeleteDirectory(dirPath, recursive)
|
||||
if safeToDelete {
|
||||
sqlStatement = fmt.Sprintf("DELETE FROM %s WHERE directoryRoot=$1 AND directoryName=$2", directoriesTableName)
|
||||
_, err = s.db.Exec(sqlStatement, directoryRoot, directoryName)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
if recursive {
|
||||
// delete descendant files
|
||||
sqlStatement = fmt.Sprintf("DELETE FROM %s WHERE directorypart LIKE $1", filesTableName)
|
||||
_, err = s.db.Exec(sqlStatement, dirPath+"%")
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// delete descendant directories
|
||||
sqlStatement = fmt.Sprintf("DELETE FROM %s WHERE directoryRoot LIKE $1", directoriesTableName)
|
||||
_, err = s.db.Exec(sqlStatement, dirPath+"%")
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
func (s *PostgresStore) findFiles(dirPath string, lastFileName string, limit int) (files []filer.FileEntry, err error) {
|
||||
var rows *sql.Rows = nil
|
||||
|
||||
if lastFileName == "" {
|
||||
sqlStatement :=
|
||||
fmt.Sprintf("SELECT fid, directorypart, filepart FROM %s WHERE directorypart=$1 ORDER BY id LIMIT $2", filesTableName)
|
||||
rows, err = s.db.Query(sqlStatement, dirPath, limit)
|
||||
} else {
|
||||
sqlStatement :=
|
||||
fmt.Sprintf("SELECT fid, directorypart, filepart FROM %s WHERE directorypart=$1 "+
|
||||
"AND id > (SELECT id FROM %s WHERE directoryPart=$2 AND filepart=$3) ORDER BY id LIMIT $4",
|
||||
filesTableName, filesTableName)
|
||||
_, lastFileNameName := filepath.Split(lastFileName)
|
||||
rows, err = s.db.Query(sqlStatement, dirPath, dirPath, lastFileNameName, limit)
|
||||
}
|
||||
|
||||
if err != nil {
|
||||
glog.V(0).Infof("Postgres find files error: %s", err)
|
||||
}
|
||||
|
||||
if rows != nil {
|
||||
defer rows.Close()
|
||||
|
||||
for rows.Next() {
|
||||
var fid filer.FileId
|
||||
var directoryPart string
|
||||
var filePart string
|
||||
|
||||
scanErr := rows.Scan(&fid, &directoryPart, &filePart)
|
||||
if scanErr != nil {
|
||||
err = scanErr
|
||||
}
|
||||
|
||||
files = append(files, filer.FileEntry{Name: filepath.Join(directoryPart, filePart), Id: fid})
|
||||
if len(files) >= limit {
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
glog.V(3).Infof("Postgres findFiles -- looking up files under '%s' and found %d files. Limit=%d, lastFileName=%s",
|
||||
dirPath, len(files), limit, lastFileName)
|
||||
|
||||
return files, err
|
||||
}
|
||||
|
|
|
|||
|
|
@ -25,7 +25,7 @@ import (
|
|||
type filerConf struct {
|
||||
MysqlConf []mysql_store.MySqlConf `json:"mysql"`
|
||||
mysql_store.ShardingConf
|
||||
PostgresConf []postgres_store.PostgresConf `json:"postgres"`
|
||||
PostgresConf *postgres_store.PostgresConf `json:"postgres"`
|
||||
}
|
||||
|
||||
func parseConfFile(confPath string) (*filerConf, error) {
|
||||
|
|
@ -88,9 +88,8 @@ func NewFilerServer(r *http.ServeMux, ip string, port int, master string, dir st
|
|||
if setting.MysqlConf != nil && len(setting.MysqlConf) != 0 {
|
||||
mysql_store := mysql_store.NewMysqlStore(setting.MysqlConf, setting.IsSharding, setting.ShardCount)
|
||||
fs.filer = flat_namespace.NewFlatNamespaceFiler(master, mysql_store)
|
||||
} else if setting.PostgresConf != nil && len(setting.PostgresConf) != 0 {
|
||||
postgres_store := postgres_store.NewPostgresStore(setting.PostgresConf, setting.IsSharding, setting.ShardCount)
|
||||
fs.filer = flat_namespace.NewFlatNamespaceFiler(master, postgres_store)
|
||||
} else if setting.PostgresConf != nil {
|
||||
fs.filer = postgres_store.NewPostgresStore(master, *setting.PostgresConf)
|
||||
} else if cassandra_server != "" {
|
||||
cassandra_store, err := cassandra_store.NewCassandraStore(cassandra_keyspace, cassandra_server)
|
||||
if err != nil {
|
||||
|
|
|
|||
Loading…
Reference in a new issue