func TestNewConnPool(t *testing.T) {
	t.Parallel()

	var numCallbacks int
	afterConnect := func(c *pgx.Conn) error {
		numCallbacks++
		return nil
	}

	config := pgx.ConnPoolConfig{ConnConfig: *defaultConnConfig, MaxConnections: 2, AfterConnect: afterConnect}
	pool, err := pgx.NewConnPool(config)
	if err != nil {
		t.Fatal("Unable to establish connection pool")
	}
	defer pool.Close()

	// It initially connects once
	stat := pool.Stat()
	if stat.CurrentConnections != 1 {
		t.Errorf("Expected 1 connection to be established immediately, but %v were", numCallbacks)
	}

	// Pool creation returns an error if any AfterConnect callback does
	errAfterConnect := errors.New("Some error")
	afterConnect = func(c *pgx.Conn) error {
		return errAfterConnect
	}

	config = pgx.ConnPoolConfig{ConnConfig: *defaultConnConfig, MaxConnections: 2, AfterConnect: afterConnect}
	pool, err = pgx.NewConnPool(config)
	if err != errAfterConnect {
		t.Errorf("Expected errAfterConnect but received unexpected: %v", err)
	}
}
Esempio n. 2
0
func main() {
	var err error
	connPoolConfig := pgx.ConnPoolConfig{
		ConnConfig: pgx.ConnConfig{
			Host:     "127.0.0.1",
			User:     "******",
			Password: "******",
			Database: "url_shortener",
			Logger:   log.New("module", "pgx"),
		},
		MaxConnections: 5,
		AfterConnect:   afterConnect,
	}
	pool, err = pgx.NewConnPool(connPoolConfig)
	if err != nil {
		log.Crit("Unable to create connection pool", "error", err)
		os.Exit(1)
	}

	http.HandleFunc("/", urlHandler)

	log.Info("Starting URL shortener on localhost:8080")
	err = http.ListenAndServe("localhost:8080", nil)
	if err != nil {
		log.Crit("Unable to start web server", "error", err)
		os.Exit(1)
	}
}
func createConnPool(t *testing.T, maxConnections int) *pgx.ConnPool {
	config := pgx.ConnPoolConfig{ConnConfig: *defaultConnConfig, MaxConnections: maxConnections}
	pool, err := pgx.NewConnPool(config)
	if err != nil {
		t.Fatalf("Unable to create connection pool: %v", err)
	}
	return pool
}
func TestNewConnPoolMaxConnectionsCannotBeLessThan2(t *testing.T) {
	t.Parallel()

	config := pgx.ConnPoolConfig{ConnConfig: *defaultConnConfig, MaxConnections: 1}
	pool, err := pgx.NewConnPool(config)
	if err == nil {
		pool.Close()
		t.Fatal(`Expected NewConnPool to fail with "MaxConnections must be at least 2" error, but it succeeded`)
	}
	if err.Error() != "MaxConnections must be at least 2" {
		t.Fatalf(`Expected NewConnPool to fail with "MaxConnections must be at least 2" error, but it failed with %v`, err)
	}
}
func TestNewConnPoolDefaultsTo5MaxConnections(t *testing.T) {
	t.Parallel()

	config := pgx.ConnPoolConfig{ConnConfig: *defaultConnConfig}
	pool, err := pgx.NewConnPool(config)
	if err != nil {
		t.Fatal("Unable to establish connection pool")
	}
	defer pool.Close()

	if n := pool.Stat().MaxConnections; n != 5 {
		t.Fatalf("Expected pool to default to 5 max connections, but it was %d", n)
	}
}
func BenchmarkConnPool(b *testing.B) {
	config := pgx.ConnPoolConfig{ConnConfig: *defaultConnConfig, MaxConnections: 5}
	pool, err := pgx.NewConnPool(config)
	if err != nil {
		b.Fatalf("Unable to create connection pool: %v", err)
	}
	defer pool.Close()

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		var conn *pgx.Conn
		if conn, err = pool.Acquire(); err != nil {
			b.Fatalf("Unable to acquire connection: %v", err)
		}
		pool.Release(conn)
	}
}
Esempio n. 7
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func main() {
	var keys []*tufdata.Key
	if err := json.Unmarshal([]byte(os.Getenv("ROOT_KEYS")), &keys); err != nil {
		log.Fatal("missing or invalid ROOT_KEYS:", err)
	}
	opts := &tuf.HTTPRemoteOptions{
		UserAgent: "cli-redirect/v1",
	}
	remote, err := tuf.HTTPRemoteStore(os.Getenv("REPO_URL"), opts)
	if err != nil {
		log.Fatal("error initializing remote store:", err)
	}
	r := &redirector{
		RepoURL: os.Getenv("REPO_URL"),
		Client:  tuf.NewClient(tuf.MemoryLocalStore(), remote),
		refresh: make(chan struct{}, 1),
		notify:  make(chan struct{}, 1),
	}
	if err := r.Client.Init(keys, len(keys)); err != nil {
		log.Fatal("error initializing client:", err)
	}
	if _, err := r.Client.Update(); err != nil {
		log.Fatal("error running first update:", err)
	}
	targets, err := r.Client.Targets()
	if err != nil {
		log.Fatal("error getting targets:", err)
	}
	r.Targets.Store(targets)

	pgConf, err := pgx.ParseURI(os.Getenv("DATABASE_URL"))
	if err != nil {
		log.Fatal("error parsing DATABASE_URL:", err)
	}
	r.DB, err = pgx.NewConnPool(pgx.ConnPoolConfig{ConnConfig: pgConf})
	if err != nil {
		log.Fatal("error creating pgx pool:", err)
	}

	go r.pgListener()
	go r.pgNotifier()
	go r.tufLoader()

	log.Fatal(http.ListenAndServe(":"+os.Getenv("PORT"), r))
}
Esempio n. 8
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func main() {
	var err error
	pool, err = pgx.NewConnPool(extractConfig())
	if err != nil {
		fmt.Fprintln(os.Stderr, "Unable to connect to database:", err)
		os.Exit(1)
	}

	go listen()

	fmt.Println(`Type a message and press enter.

This message should appear in any other chat instances connected to the same
database.

Type "exit" to quit.
`)

	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		msg := scanner.Text()
		if msg == "exit" {
			os.Exit(0)
		}

		_, err = pool.Exec("select pg_notify('chat', $1)", msg)
		if err != nil {
			fmt.Fprintln(os.Stderr, "Error sending notification:", err)
			os.Exit(1)
		}
	}
	if err := scanner.Err(); err != nil {
		fmt.Fprintln(os.Stderr, "Error scanning from stdin:", err)
		os.Exit(1)
	}
}