seaweedfs/weed/filer/postgres/postgres_store.go
2021-04-02 02:22:26 -07:00

94 lines
2.5 KiB
Go

package postgres
import (
"database/sql"
"fmt"
"time"
"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+"upsertQuery"),
configuration.GetBool(prefix+"enableUpsert"),
configuration.GetString(prefix+"username"),
configuration.GetString(prefix+"password"),
configuration.GetString(prefix+"hostname"),
configuration.GetInt(prefix+"port"),
configuration.GetString(prefix+"database"),
configuration.GetString(prefix+"schema"),
configuration.GetString(prefix+"sslmode"),
configuration.GetInt(prefix+"connection_max_idle"),
configuration.GetInt(prefix+"connection_max_open"),
configuration.GetInt(prefix+"connection_max_lifetime_seconds"),
)
}
func (store *PostgresStore) initialize(upsertQuery string, enableUpsert bool, user, password, hostname string, port int, database, schema, sslmode string, maxIdle, maxOpen, maxLifetimeSeconds int) (err error) {
store.SupportBucketTable = false
if !enableUpsert {
upsertQuery = ""
}
store.SqlGenerator = &SqlGenPostgres{
CreateTableSqlTemplate: "",
DropTableSqlTemplate: `drop table "%s"`,
UpsertQueryTemplate: upsertQuery,
}
sqlUrl := fmt.Sprintf(CONNECTION_URL_PATTERN, hostname, port, sslmode)
if user != "" {
sqlUrl += " user=" + user
}
adaptedSqlUrl := sqlUrl
if password != "" {
sqlUrl += " password=" + password
adaptedSqlUrl += " password=ADAPTED"
}
if database != "" {
sqlUrl += " dbname=" + database
adaptedSqlUrl += " dbname=" + database
}
if schema != "" {
sqlUrl += " search_path=" + schema
adaptedSqlUrl += " search_path=" + schema
}
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", adaptedSqlUrl, err)
}
store.DB.SetMaxIdleConns(maxIdle)
store.DB.SetMaxOpenConns(maxOpen)
store.DB.SetConnMaxLifetime(time.Duration(maxLifetimeSeconds) * time.Second)
if err = store.DB.Ping(); err != nil {
return fmt.Errorf("connect to %s error:%v", sqlUrl, err)
}
return nil
}