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package postgres
import ( "database/sql" "fmt"
"github.com/chrislusf/seaweedfs/weed/filer" "github.com/chrislusf/seaweedfs/weed/filer/abstract_sql" "github.com/chrislusf/seaweedfs/weed/util" _ "github.com/lib/pq" )
const ( CONNECTION_URL_PATTERN = "host=%s port=%d sslmode=%s connect_timeout=30" )
func init() { filer.Stores = append(filer.Stores, &PostgresStore{}) }
type PostgresStore struct { abstract_sql.AbstractSqlStore }
func (store *PostgresStore) GetName() string { return "postgres" }
func (store *PostgresStore) Initialize(configuration util.Configuration, prefix string) (err error) { return store.initialize( configuration.GetString(prefix+"username"), configuration.GetString(prefix+"password"), configuration.GetString(prefix+"hostname"), configuration.GetInt(prefix+"port"), configuration.GetString(prefix+"database"), configuration.GetString(prefix+"sslmode"), configuration.GetInt(prefix+"connection_max_idle"), configuration.GetInt(prefix+"connection_max_open"), ) }
func (store *PostgresStore) initialize(user, password, hostname string, port int, database, sslmode string, maxIdle, maxOpen int) (err error) {
store.SqlInsert = "INSERT INTO filemeta (dirhash,name,directory,meta) VALUES($1,$2,$3,$4)" store.SqlUpdate = "UPDATE filemeta SET meta=$1 WHERE dirhash=$2 AND name=$3 AND directory=$4" store.SqlFind = "SELECT meta FROM filemeta WHERE dirhash=$1 AND name=$2 AND directory=$3" store.SqlDelete = "DELETE FROM filemeta WHERE dirhash=$1 AND name=$2 AND directory=$3" store.SqlDeleteFolderChildren = "DELETE FROM filemeta WHERE dirhash=$1 AND directory=$2" store.SqlListExclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=$1 AND name>$2 AND directory=$3 AND name like $4 ORDER BY NAME ASC LIMIT $5" store.SqlListInclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=$1 AND name>=$2 AND directory=$3 AND name like $4 ORDER BY NAME ASC LIMIT $5"
sqlUrl := fmt.Sprintf(CONNECTION_URL_PATTERN, hostname, port, sslmode) if user != "" { sqlUrl += " user=" + user } if password != "" { sqlUrl += " password=" + password } if database != "" { sqlUrl += " dbname=" + database } var dbErr error store.DB, dbErr = sql.Open("postgres", sqlUrl) if dbErr != nil { store.DB.Close() store.DB = nil return fmt.Errorf("can not connect to %s error:%v", sqlUrl, err) }
store.DB.SetMaxIdleConns(maxIdle) store.DB.SetMaxOpenConns(maxOpen)
if err = store.DB.Ping(); err != nil { return fmt.Errorf("connect to %s error:%v", sqlUrl, err) }
return nil }
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