postgres.go•3.98 kB
// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package postgres
import (
"context"
"fmt"
"net/url"
"strings"
"github.com/goccy/go-yaml"
"github.com/googleapis/genai-toolbox/internal/sources"
"github.com/googleapis/genai-toolbox/internal/util"
"github.com/jackc/pgx/v5/pgxpool"
"go.opentelemetry.io/otel/trace"
)
const SourceKind string = "postgres"
// validate interface
var _ sources.SourceConfig = Config{}
func init() {
if !sources.Register(SourceKind, newConfig) {
panic(fmt.Sprintf("source kind %q already registered", SourceKind))
}
}
func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (sources.SourceConfig, error) {
actual := Config{Name: name}
if err := decoder.DecodeContext(ctx, &actual); err != nil {
return nil, err
}
return actual, nil
}
type Config struct {
Name string `yaml:"name" validate:"required"`
Kind string `yaml:"kind" validate:"required"`
Host string `yaml:"host" validate:"required"`
Port string `yaml:"port" validate:"required"`
User string `yaml:"user" validate:"required"`
Password string `yaml:"password" validate:"required"`
Database string `yaml:"database" validate:"required"`
QueryParams map[string]string `yaml:"queryParams"`
}
func (r Config) SourceConfigKind() string {
return SourceKind
}
func (r Config) Initialize(ctx context.Context, tracer trace.Tracer) (sources.Source, error) {
pool, err := initPostgresConnectionPool(ctx, tracer, r.Name, r.Host, r.Port, r.User, r.Password, r.Database, r.QueryParams)
if err != nil {
return nil, fmt.Errorf("unable to create pool: %w", err)
}
err = pool.Ping(ctx)
if err != nil {
return nil, fmt.Errorf("unable to connect successfully: %w", err)
}
s := &Source{
Name: r.Name,
Kind: SourceKind,
Pool: pool,
}
return s, nil
}
var _ sources.Source = &Source{}
type Source struct {
Name string `yaml:"name"`
Kind string `yaml:"kind"`
Pool *pgxpool.Pool
}
func (s *Source) SourceKind() string {
return SourceKind
}
func (s *Source) PostgresPool() *pgxpool.Pool {
return s.Pool
}
func initPostgresConnectionPool(ctx context.Context, tracer trace.Tracer, name, host, port, user, pass, dbname string, queryParams map[string]string) (*pgxpool.Pool, error) {
//nolint:all // Reassigned ctx
ctx, span := sources.InitConnectionSpan(ctx, tracer, SourceKind, name)
defer span.End()
userAgent, err := util.UserAgentFromContext(ctx)
if err != nil {
userAgent = "genai-toolbox"
}
if queryParams == nil {
// Initialize the map before using it
queryParams = make(map[string]string)
}
if _, ok := queryParams["application_name"]; !ok {
queryParams["application_name"] = userAgent
}
// urlExample := "postgres:dd//username:password@localhost:5432/database_name"
url := &url.URL{
Scheme: "postgres",
User: url.UserPassword(user, pass),
Host: fmt.Sprintf("%s:%s", host, port),
Path: dbname,
RawQuery: ConvertParamMapToRawQuery(queryParams),
}
pool, err := pgxpool.New(ctx, url.String())
if err != nil {
return nil, fmt.Errorf("unable to create connection pool: %w", err)
}
return pool, nil
}
func ConvertParamMapToRawQuery(queryParams map[string]string) string {
queryArray := []string{}
for k, v := range queryParams {
queryArray = append(queryArray, fmt.Sprintf("%s=%s", k, v))
}
return strings.Join(queryArray, "&")
}