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Merge pull request #414 from mtolman/master 

Updating PostgreSQL file store integration to support directories.
pull/424/head
Chris Lu 8 years ago
committed by GitHub
parent
cc34ac0bd5 43e655afc8
commit
6b5867ce9d
2 changed files with 440 additions and 183 deletions
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  1. 568
      weed/filer/postgres_store/postgres_store.go
  2. 7
      weed/server/filer_server.go

568
weed/filer/postgres_store/postgres_store.go
View File

@ -2,26 +2,30 @@ package postgres_store
import (
"database/sql"
"errors"
"fmt"
"hash/crc32"
"path/filepath"
"sync"
"time"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/glog"
_ "github.com/lib/pq"
_ "path/filepath"
"strings"
)
const (
default_maxIdleConnections = 100
default_maxOpenConnections = 50
default_maxTableNums = 1024
tableName = "filer_mapping"
filesTableName = "files"
directoriesTableName = "directories"
)
var (
_init_db sync.Once
_db_connections []*sql.DB
_init_db sync.Once
_db_connection *sql.DB
)
type PostgresConf struct {
@ -30,25 +34,58 @@ type PostgresConf struct {
HostName string
Port int
DataBase string
SslMode string
SslMode string
MaxIdleConnections int
MaxOpenConnections int
}
type ShardingConf struct {
IsSharding bool `json:"isSharding"`
ShardCount int `json:"shardCount"`
}
type PostgresStore struct {
dbs []*sql.DB
isSharding bool
shardCount int
server string
user string
db *sql.DB
server string
user string
password string
}
func (s *PostgresStore) CreateFile(fullFileName string, fid string) (err error) {
glog.V(3).Infoln("Calling posgres_store CreateFile")
return s.Put(fullFileName, fid)
}
func (s *PostgresStore) FindFile(fullFileName string) (fid string, err error) {
glog.V(3).Infoln("Calling posgres_store FindFile")
return s.Get(fullFileName)
}
func (s *PostgresStore) DeleteFile(fullFileName string) (fid string, err error) {
glog.V(3).Infoln("Calling posgres_store DeleteFile")
return "", s.Delete(fullFileName)
}
func (s *PostgresStore) FindDirectory(dirPath string) (dirId filer.DirectoryId, err error) {
glog.V(3).Infoln("Calling posgres_store FindDirectory")
return s.FindDir(dirPath)
}
func (s *PostgresStore) ListDirectories(dirPath string) (dirs []filer.DirectoryEntry, err error) {
glog.V(3).Infoln("Calling posgres_store ListDirectories")
return s.ListDirs(dirPath)
}
func (s *PostgresStore) ListFiles(dirPath string, lastFileName string, limit int) (files []filer.FileEntry, err error) {
glog.V(3).Infoln("Calling posgres_store ListFiles")
return s.FindFiles(dirPath, lastFileName, limit)
}
func (s *PostgresStore) DeleteDirectory(dirPath string, recursive bool) (err error) {
glog.V(3).Infoln("Calling posgres_store DeleteDirectory")
return s.DeleteDir(dirPath, recursive)
}
func (s *PostgresStore) Move(fromPath string, toPath string) (err error) {
glog.V(3).Infoln("Calling posgres_store Move")
return errors.New("Move is not yet implemented for the PostgreSQL store.")
}
func databaseExists(db *sql.DB, databaseName string) (bool, error) {
sqlStatement := "SELECT datname from pg_database WHERE datname='%s'"
row := db.QueryRow(fmt.Sprintf(sqlStatement, databaseName))
@ -64,164 +101,126 @@ func databaseExists(db *sql.DB, databaseName string) (bool, error) {
return true, nil
}
func createDatabase(db *sql.DB, databaseName string) (error) {
sqlStatement := "CREATE DATABASE %s ENCODING='UTF8'";
func createDatabase(db *sql.DB, databaseName string) error {
sqlStatement := "CREATE DATABASE %s ENCODING='UTF8'"
_, err := db.Exec(fmt.Sprintf(sqlStatement, databaseName))
return err
}
func getDbConnection(confs []PostgresConf) []*sql.DB {
func getDbConnection(conf PostgresConf) *sql.DB {
_init_db.Do(func() {
for _, conf := range confs {
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)
glog.V(3).Infoln("Opening postgres master database")
var dbErr error
_db_connection, dbErr := sql.Open("postgres", sqlUrl)
if dbErr != nil {
_db_connection.Close()
_db_connection = nil
panic(dbErr)
}
pingErr := _db_connection.Ping()
if pingErr != nil {
_db_connection.Close()
_db_connection = nil
panic(pingErr)
}
glog.V(3).Infoln("Checking to see if DB exists: ", conf.DataBase)
var existsErr error
dbExists, existsErr := databaseExists(_db_connection, conf.DataBase)
if existsErr != nil {
_db_connection.Close()
_db_connection = nil
panic(existsErr)
}
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)
glog.V(3).Infoln("Opening postgres master database")
if !dbExists {
glog.V(3).Infoln("Database doesn't exist. Attempting to create one: ", conf.DataBase)
createErr := createDatabase(_db_connection, conf.DataBase)
if createErr != nil {
_db_connection.Close()
_db_connection = nil
panic(createErr)
}
}
var dbErr error
_db_connection, dbErr := sql.Open("postgres", sqlUrl)
if dbErr != nil {
_db_connection.Close()
_db_connection = nil
panic(dbErr)
}
glog.V(3).Infoln("Closing master postgres database and opening configured database: ", conf.DataBase)
pingErr := _db_connection.Ping()
if pingErr != nil {
_db_connection.Close()
_db_connection = nil
panic(pingErr)
}
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)
_db_connection, dbErr = sql.Open("postgres", sqlUrl)
if dbErr != nil {
_db_connection.Close()
_db_connection = nil
panic(dbErr)
}
glog.V(3).Infoln("Checking to see if DB exists: ", conf.DataBase)
var existsErr error
dbExists, existsErr := databaseExists(_db_connection, conf.DataBase)
if existsErr != nil {
_db_connection.Close()
_db_connection = nil
panic(existsErr)
}
pingErr = _db_connection.Ping()
if pingErr != nil {
if !dbExists {
glog.V(3).Infoln("Database doesn't exist. Attempting to create one: ", conf.DataBase)
createErr := createDatabase(_db_connection, conf.DataBase)
if createErr != nil {
_db_connection.Close()
_db_connection = nil
panic(pingErr)
panic(createErr)
}
}
var maxIdleConnections, maxOpenConnections int
glog.V(3).Infoln("Closing master postgres database and opening configured database: ", conf.DataBase)
_db_connection.Close()
_db_connection = nil
if conf.MaxIdleConnections != 0 {
maxIdleConnections = conf.MaxIdleConnections
} else {
maxIdleConnections = default_maxIdleConnections
}
if conf.MaxOpenConnections != 0 {
maxOpenConnections = conf.MaxOpenConnections
} else {
maxOpenConnections = default_maxOpenConnections
}
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)
_db_connection, dbErr = sql.Open("postgres", sqlUrl)
if dbErr != nil {
_db_connection.Close()
_db_connection = nil
panic(dbErr)
}
_db_connection.SetMaxIdleConns(maxIdleConnections)
_db_connection.SetMaxOpenConns(maxOpenConnections)
_db_connections = append(_db_connections, _db_connection)
pingErr = _db_connection.Ping()
if pingErr != nil {
_db_connection.Close()
_db_connection = nil
panic(pingErr)
}
})
return _db_connections
}
func NewPostgresStore(confs []PostgresConf, isSharding bool, shardCount int) *PostgresStore {
pg := &PostgresStore{
dbs: getDbConnection(confs),
isSharding: isSharding,
shardCount: shardCount,
}
var maxIdleConnections, maxOpenConnections int
for _, db := range pg.dbs {
if !isSharding {
pg.shardCount = 1
if conf.MaxIdleConnections != 0 {
maxIdleConnections = conf.MaxIdleConnections
} else {
if pg.shardCount == 0 {
pg.shardCount = default_maxTableNums
}
maxIdleConnections = default_maxIdleConnections
}
for i := 0; i < pg.shardCount; i++ {
if err := pg.createTables(db, tableName, i); err != nil {
fmt.Printf("create table failed %v", err)
}
if conf.MaxOpenConnections != 0 {
maxOpenConnections = conf.MaxOpenConnections
} else {
maxOpenConnections = default_maxOpenConnections
}
}
return pg
_db_connection.SetMaxIdleConns(maxIdleConnections)
_db_connection.SetMaxOpenConns(maxOpenConnections)
})
return _db_connection
}
func (s *PostgresStore) 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 NewPostgresStore(master string, confs []PostgresConf, isSharding bool, shardCount int) *PostgresStore {
func NewPostgresStore(master string, conf PostgresConf) *PostgresStore {
pg := &PostgresStore{
db: getDbConnection(conf),
}
func (s *PostgresStore) 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
pg.createDirectoriesTable()
if err := pg.createFilesTable(); err != nil {
fmt.Printf("create table failed %v", err)
}
return
return pg
}
func (s *PostgresStore) Get(fullFilePath string) (fid string, err error) {
instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
if err != nil {
return "", fmt.Errorf("PostgresStore Get operation can not parse file path %s: err is %v", fullFilePath, err)
}
fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName)
fid, err = s.query(fullFilePath)
return fid, err
}
func (s *PostgresStore) Put(fullFilePath string, fid string) (err error) {
var tableFullName string
instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
if err != nil {
return fmt.Errorf("PostgresStore 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 {
if old_fid, err = s.query(fullFilePath); err != nil && err != sql.ErrNoRows {
return fmt.Errorf("PostgresStore 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 = s.insert(fullFilePath, fid)
if err != nil {
return fmt.Errorf("PostgresStore 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 = s.update(fullFilePath, fid)
if err != nil {
return fmt.Errorf("PostgresStore Put operation failed when updating path %s with fid %s : err is %v", fullFilePath, fid, err)
}
@ -232,16 +231,15 @@ func (s *PostgresStore) Put(fullFilePath string, fid string) (err error) {
func (s *PostgresStore) Delete(fullFilePath string) (err error) {
var fid string
instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath)
if err != nil {
return fmt.Errorf("PostgresStore 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 {
if fid, err = s.query(fullFilePath); err != nil {
return fmt.Errorf("PostgresStore 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 {
if err = s.delete(fullFilePath); err != nil {
return fmt.Errorf("PostgresStore Delete operation failed when deleting path %s: err is %v", fullFilePath, err)
} else {
return nil
@ -249,39 +247,87 @@ func (s *PostgresStore) Delete(fullFilePath string) (err error) {
}
func (s *PostgresStore) Close() {
for _, db := range s.dbs {
db.Close()
s.db.Close()
}
func (s *PostgresStore) FindDir(dirPath string) (dirId filer.DirectoryId, err error) {
dirId, _, err = s.lookupDirectory(dirPath)
return dirId, err
}
func (s *PostgresStore) ListDirs(dirPath string) (dirs []filer.DirectoryEntry, err error) {
dirs, err = s.findDirectories(dirPath, 20)
glog.V(3).Infof("Postgres ListDirs = found %d directories under %s", len(dirs), dirPath)
return dirs, err
}
func (s *PostgresStore) DeleteDir(dirPath string, recursive bool) (err error) {
err = s.deleteDirectory(dirPath, recursive)
if err != nil {
glog.V(0).Infof("Error in Postgres DeleteDir '%s' (recursive = '%t'): %s", err)
}
return err
}
var createTable = `
func (s *PostgresStore) FindFiles(dirPath string, lastFileName string, limit int) (files []filer.FileEntry, err error) {
files, err = s.findFiles(dirPath, lastFileName, limit)
return files, err
}
var createDirectoryTable = `
CREATE TABLE IF NOT EXISTS %s (
id BIGSERIAL NOT NULL,
uriPath VARCHAR(1024) NOT NULL DEFAULT '',
directoryRoot VARCHAR(1024) NOT NULL DEFAULT '',
directoryName VARCHAR(1024) NOT NULL DEFAULT '',
CONSTRAINT unique_directory UNIQUE (directoryRoot, directoryName)
);
`
var createFileTable = `
CREATE TABLE IF NOT EXISTS %s (
id BIGSERIAL NOT NULL,
directoryPart VARCHAR(1024) NOT NULL DEFAULT '',
filePart VARCHAR(1024) NOT NULL DEFAULT '',
fid VARCHAR(36) NOT NULL DEFAULT '',
createTime BIGINT NOT NULL DEFAULT 0,
updateTime BIGINT NOT NULL DEFAULT 0,
remark VARCHAR(20) NOT NULL DEFAULT '',
status SMALLINT NOT NULL DEFAULT '1',
PRIMARY KEY (id),
CONSTRAINT %s_index_uriPath UNIQUE (uriPath)
CONSTRAINT %s_unique_file UNIQUE (directoryPart, filePart)
);
`
func (s *PostgresStore) createTables(db *sql.DB, tableName string, postfix int) error {
var realTableName string
if s.isSharding {
realTableName = fmt.Sprintf("%s_%04d", tableName, postfix)
} else {
realTableName = tableName
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
}
defer stmt.Close()
_, err = stmt.Exec()
if err != nil {
return err
}
return nil
}
func (s *PostgresStore) createFilesTable() error {
glog.V(3).Infoln("Creating postgres table if it doesn't exist: ", realTableName)
glog.V(3).Infoln("Creating postgres table if it doesn't exist: ", filesTableName)
sqlCreate := fmt.Sprintf(createTable, realTableName, realTableName)
sqlCreate := fmt.Sprintf(createFileTable, filesTableName, filesTableName)
stmt, err := db.Prepare(sqlCreate)
stmt, err := s.db.Prepare(sqlCreate)
if err != nil {
return err
}
@ -294,10 +340,11 @@ 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)
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 := db.QueryRow(sqlStatement, uriPath)
row := s.db.QueryRow(sqlStatement, directoryPart, filePart)
var fid string
err := row.Scan(&fid)
@ -309,12 +356,13 @@ func (s *PostgresStore) query(uriPath string, db *sql.DB, tableName string) (str
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
}
@ -326,12 +374,18 @@ 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
@ -344,15 +398,59 @@ func (s *PostgresStore) insert(uriPath string, fid string, db *sql.DB, tableName
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
}
@ -363,3 +461,163 @@ func (s *PostgresStore) delete(uriPath string, db *sql.DB, tableName string) 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
}

7
weed/server/filer_server.go
View File

@ -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 {

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