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package postgres |
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import ( |
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"context" |
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"time" |
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"github.com/jackc/pgx/v5" |
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"github.com/jackc/pgx/v5/pgxpool" |
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"github.com/Masterminds/squirrel" |
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) |
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// Postgres - Structure for Postresql instance |
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type Postgres struct { |
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ReadPool *pgxpool.Pool |
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WritePool *pgxpool.Pool |
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Builder squirrel.StatementBuilderType |
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// options |
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maxDataPerWrite int |
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maxRetries int |
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watchBufferSize int |
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maxConnectionLifeTime time.Duration |
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maxConnectionIdleTime time.Duration |
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maxOpenConnections int |
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maxIdleConnections int |
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simpleMode bool |
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} |
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// New - Creates new postgresql db instance |
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func New(uri string, opts ...Option) (*Postgres, error) { |
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pg := &Postgres{ |
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maxOpenConnections: _defaultMaxOpenConnections, |
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maxIdleConnections: _defaultMaxIdleConnections, |
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maxDataPerWrite: _defaultMaxDataPerWrite, |
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maxRetries: _defaultMaxRetries, |
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watchBufferSize: _defaultWatchBufferSize, |
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simpleMode: _defaultSimpleMode, |
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} |
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// Custom options |
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for _, opt := range opts { |
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opt(pg) |
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} |
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pg.Builder = squirrel.StatementBuilder.PlaceholderFormat(squirrel.Dollar) |
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writeConfig, err := pgxpool.ParseConfig(uri) |
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if err != nil { |
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return nil, err |
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} |
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readConfig, err := pgxpool.ParseConfig(uri) |
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if err != nil { |
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return nil, err |
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} |
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if pg.simpleMode { |
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writeConfig.ConnConfig.DefaultQueryExecMode = pgx.QueryExecModeSimpleProtocol |
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readConfig.ConnConfig.DefaultQueryExecMode = pgx.QueryExecModeSimpleProtocol |
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} |
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writeConfig.MinConns = int32(pg.maxIdleConnections) |
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readConfig.MinConns = int32(pg.maxIdleConnections) |
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writeConfig.MaxConns = int32(pg.maxOpenConnections) |
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readConfig.MaxConns = int32(pg.maxOpenConnections) |
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writeConfig.MaxConnIdleTime = pg.maxConnectionIdleTime |
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readConfig.MaxConnIdleTime = pg.maxConnectionIdleTime |
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writeConfig.MaxConnLifetime = pg.maxConnectionLifeTime |
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readConfig.MaxConnLifetime = pg.maxConnectionLifeTime |
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writeConfig.MaxConnLifetimeJitter = time.Duration(0.2 * float64(pg.maxConnectionLifeTime)) |
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readConfig.MaxConnLifetimeJitter = time.Duration(0.2 * float64(pg.maxConnectionLifeTime)) |
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if _, ok := readConfig.ConnConfig.Config.RuntimeParams["plan_cache_mode"]; !ok { |
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readConfig.ConnConfig.Config.RuntimeParams["plan_cache_mode"] = "force_custom_plan" |
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} |
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if _, ok := writeConfig.ConnConfig.Config.RuntimeParams["plan_cache_mode"]; !ok { |
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writeConfig.ConnConfig.Config.RuntimeParams["plan_cache_mode"] = "force_custom_plan" |
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} |
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initialContext, cancelInit := context.WithTimeout(context.Background(), 5*time.Second) |
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defer cancelInit() |
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pg.WritePool, err = pgxpool.NewWithConfig(initialContext, writeConfig) |
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if err != nil { |
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return nil, err |
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} |
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pg.ReadPool, err = pgxpool.NewWithConfig(initialContext, readConfig) |
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if err != nil { |
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return nil, err |
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} |
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return pg, nil |
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} |
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func (p *Postgres) GetMaxDataPerWrite() int { |
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return p.maxDataPerWrite |
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} |
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func (p *Postgres) GetMaxRetries() int { |
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return p.maxRetries |
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} |
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func (p *Postgres) GetWatchBufferSize() int { |
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return p.watchBufferSize |
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} |
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// GetEngineType - Get the engine type which is postgresql in string |
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func (p *Postgres) GetEngineType() string { |
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return "postgres" |
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} |
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// Close - Close postgresql instance |
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func (p *Postgres) Close() error { |
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p.ReadPool.Close() |
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p.WritePool.Close() |
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return nil |
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} |
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// IsReady - Check if database is ready |
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func (p *Postgres) IsReady(ctx context.Context) (bool, error) { |
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ctx, cancel := context.WithTimeout(ctx, 2*time.Second) |
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defer cancel() |
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if err := p.ReadPool.Ping(ctx); err != nil { |
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return false, err |
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} |
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return true, nil |
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} |
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Permify /
permify
