Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/common/postgresql/service.go

@@ -0,0 +1,42 @@
+package postgresql
+
+import (
+	"database/sql"
+	"time"
+
+	// Blank import required to register driver
+	_ "github.com/jackc/pgx/v4/stdlib"
+)
+
+// Service common functionality shared between the postgresql and postgresql_extensible
+// packages.
+type Service struct {
+	DB                 *sql.DB
+	SanitizedAddress   string
+	ConnectionDatabase string
+
+	dsn         string
+	maxIdle     int
+	maxOpen     int
+	maxLifetime time.Duration
+}
+
+func (p *Service) Start() error {
+	db, err := sql.Open("pgx", p.dsn)
+	if err != nil {
+		return err
+	}
+	p.DB = db
+
+	p.DB.SetMaxOpenConns(p.maxOpen)
+	p.DB.SetMaxIdleConns(p.maxIdle)
+	p.DB.SetConnMaxLifetime(p.maxLifetime)
+
+	return nil
+}
+
+func (p *Service) Stop() {
+	if p.DB != nil {
+		p.DB.Close()
+	}
+}