Golang Context.Int方法代碼示例

// mkCommandFunc executes the "mk" command.
func mkCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	value, err := argOrStdin(c.Args(), os.Stdin, 1)
	if err != nil {
		handleError(ExitBadArgs, errors.New("value required"))
	}

	ttl := c.Int("ttl")

	ctx, cancel := contextWithTotalTimeout(c)
	// Since PrevNoExist means that the Node must not exist previously,
	// this Set method always creates a new key. Therefore, mk command
	// succeeds only if the key did not previously exist, and the command
	// prevents one from overwriting values accidentally.
	resp, err := ki.Set(ctx, key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, PrevExist: client.PrevNoExist})
	cancel()
	if err != nil {
		handleError(ExitServerError, err)
	}

	printResponseKey(resp, c.GlobalString("output"))
}

// mkCommandFunc executes the "mk" command.
func mkCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	value, err := argOrStdin(c.Args(), os.Stdin, 1)
	if err != nil {
		handleError(ExitBadArgs, errors.New("value required"))
	}

	ttl := c.Int("ttl")
	inorder := c.Bool("in-order")

	var resp *client.Response
	ctx, cancel := contextWithTotalTimeout(c)
	if !inorder {
		// Since PrevNoExist means that the Node must not exist previously,
		// this Set method always creates a new key. Therefore, mk command
		// succeeds only if the key did not previously exist, and the command
		// prevents one from overwriting values accidentally.
		resp, err = ki.Set(ctx, key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, PrevExist: client.PrevNoExist})
	} else {
		// If in-order flag is specified then create an inorder key under
		// the directory identified by the key argument.
		resp, err = ki.CreateInOrder(ctx, key, value, &client.CreateInOrderOptions{TTL: time.Duration(ttl) * time.Second})
	}
	cancel()
	if err != nil {
		handleError(ExitServerError, err)
	}

	printResponseKey(resp, c.GlobalString("output"))
}

// watchCommandFunc executes the "watch" command.
func watchCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
	if len(c.Args()) == 0 {
		return nil, errors.New("Key required")
	}
	key := c.Args()[0]
	recursive := c.Bool("recursive")
	forever := c.Bool("forever")

	index := 0
	if c.Int("after-index") != 0 {
		index = c.Int("after-index") + 1
	}

	if forever {
		sigch := make(chan os.Signal, 1)
		signal.Notify(sigch, os.Interrupt)
		stop := make(chan bool)

		go func() {
			<-sigch
			os.Exit(0)
		}()

		receiver := make(chan *etcd.Response)
		errCh := make(chan error, 1)

		go func() {
			_, err := client.Watch(key, uint64(index), recursive, receiver, stop)
			errCh <- err
		}()

		for {
			select {
			case resp := <-receiver:
				printAll(resp, c.GlobalString("output"))
			case err := <-errCh:
				handleError(-1, err)
			}
		}

	} else {
		var resp *etcd.Response
		var err error
		resp, err = client.Watch(key, uint64(index), recursive, nil, nil)

		if err != nil {
			handleError(ErrorFromEtcd, err)
		}

		if err != nil {
			return nil, err
		}
		printAll(resp, c.GlobalString("output"))
	}

	return nil, nil
}

// setDirCommandFunc executes the "setDir" command.
func setDirCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
	if len(c.Args()) == 0 {
		return nil, errors.New("Key required")
	}
	key := c.Args()[0]
	ttl := c.Int("ttl")

	return client.SetDir(key, uint64(ttl))
}

// updatedirCommandFunc executes the "updatedir" command.
func updatedirCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	ttl := c.Int("ttl")
	ctx, cancel := contextWithTotalTimeout(c)
	_, err := ki.Set(ctx, key, "", &client.SetOptions{TTL: time.Duration(ttl) * time.Second, Dir: true, PrevExist: client.PrevExist})
	cancel()
	if err != nil {
		handleError(ExitServerError, err)
	}
}

// mkdirCommandFunc executes the "mkdir" command.
func mkdirCommandFunc(c *cli.Context, ki client.KeysAPI, prevExist client.PrevExistType) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}

	key := c.Args()[0]
	ttl := c.Int("ttl")

	_, err := ki.Set(context.TODO(), key, "", &client.SetOptions{TTL: time.Duration(ttl) * time.Second, Dir: true, PrevExist: prevExist})
	if err != nil {
		handleError(ExitServerError, err)
	}
}

// makeCommandFunc executes the "make" command.
func makeCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
	if len(c.Args()) == 0 {
		return nil, errors.New("Key required")
	}
	key := c.Args()[0]
	value, err := argOrStdin(c.Args(), os.Stdin, 1)
	if err != nil {
		return nil, errors.New("Value required")
	}

	ttl := c.Int("ttl")

	return client.Create(key, value, uint64(ttl))
}

// updatedirCommandFunc executes the "updatedir" command.
func updatedirCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	value, err := argOrStdin(c.Args(), os.Stdin, 1)
	if err != nil {
		handleError(ExitBadArgs, errors.New("value required"))
	}

	ttl := c.Int("ttl")

	_, err = ki.Set(context.TODO(), key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, Dir: true, PrevExist: client.PrevExist})
	if err != nil {
		handleError(ExitServerError, err)
	}
}

// setCommandFunc executes the "set" command.
func setCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
	if len(c.Args()) == 0 {
		return nil, errors.New("key required")
	}
	key := c.Args()[0]
	value, err := argOrStdin(c.Args(), os.Stdin, 1)
	if err != nil {
		return nil, errors.New("value required")
	}

	ttl := c.Int("ttl")
	prevValue := c.String("swap-with-value")
	prevIndex := c.Int("swap-with-index")

	if prevValue == "" && prevIndex == 0 {
		return client.Set(key, value, uint64(ttl))
	}
	return client.CompareAndSwap(key, value, uint64(ttl), prevValue, uint64(prevIndex))
}

// updateCommandFunc executes the "update" command.
func updateCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	value, err := argOrStdin(c.Args(), os.Stdin, 1)
	if err != nil {
		handleError(ExitBadArgs, errors.New("value required"))
	}

	ttl := c.Int("ttl")

	resp, err := ki.Set(context.TODO(), key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, PrevExist: client.PrevExist})
	if err != nil {
		handleError(ExitServerError, err)
	}

	printResponseKey(resp, c.GlobalString("output"))
}

// watchCommandFunc executes the "watch" command.
func watchCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	recursive := c.Bool("recursive")
	forever := c.Bool("forever")
	index := 0
	if c.Int("after-index") != 0 {
		index = c.Int("after-index") + 1
	}

	stop := false
	w := ki.Watcher(key, &client.WatcherOptions{AfterIndex: uint64(index), Recursive: recursive})

	sigch := make(chan os.Signal, 1)
	signal.Notify(sigch, os.Interrupt)

	go func() {
		<-sigch
		os.Exit(0)
	}()

	for !stop {
		resp, err := w.Next(context.TODO())
		if err != nil {
			handleError(ExitServerError, err)
		}
		if resp.Node.Dir {
			continue
		}
		if recursive {
			fmt.Printf("[%s] %s\n", resp.Action, resp.Node.Key)
		}

		printResponseKey(resp, c.GlobalString("output"))

		if !forever {
			stop = true
		}
	}
}

// rmCommandFunc executes the "rm" command.
func rmCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	recursive := c.Bool("recursive")
	dir := c.Bool("dir")
	prevValue := c.String("with-value")
	prevIndex := c.Int("with-index")

	// TODO: handle transport timeout
	resp, err := ki.Delete(context.TODO(), key, &client.DeleteOptions{PrevIndex: uint64(prevIndex), PrevValue: prevValue, Dir: dir, Recursive: recursive})
	if err != nil {
		handleError(ExitServerError, err)
	}

	if !resp.Node.Dir {
		printResponseKey(resp, c.GlobalString("output"))
	}
}

func handleImportSnap(c *cli.Context) {
	d, err := ioutil.ReadFile(c.String("snap"))
	if err != nil {
		if c.String("snap") == "" {
			fmt.Printf("no snapshot file provided (use --snap)\n")
		} else {
			fmt.Printf("cannot read snapshot file %s\n", c.String("snap"))
		}
		os.Exit(1)
	}

	st := store.New()
	err = st.Recovery(d)

	wg := &sync.WaitGroup{}
	setc := make(chan set)
	concurrent := c.Int("c")
	fmt.Printf("starting to import snapshot %s with %d clients\n", c.String("snap"), concurrent)
	for i := 0; i < concurrent; i++ {
		go runSet(mustNewKeyAPI(c), setc, wg)
	}

	all, err := st.Get("/", true, true)
	if err != nil {
		handleError(ExitServerError, err)
	}
	n := copyKeys(all.Node, setc)

	hiddens := c.StringSlice("hidden")
	for _, h := range hiddens {
		allh, err := st.Get(h, true, true)
		if err != nil {
			handleError(ExitServerError, err)
		}
		n += copyKeys(allh.Node, setc)
	}
	close(setc)
	wg.Wait()
	fmt.Printf("finished importing %d keys\n", n)
}

// setCommandFunc executes the "set" command.
func setCommandFunc(c *cli.Context, ki client.KeysAPI) {
	if len(c.Args()) == 0 {
		handleError(ExitBadArgs, errors.New("key required"))
	}
	key := c.Args()[0]
	value, err := argOrStdin(c.Args(), os.Stdin, 1)
	if err != nil {
		handleError(ExitBadArgs, errors.New("value required"))
	}

	ttl := c.Int("ttl")
	prevValue := c.String("swap-with-value")
	prevIndex := c.Int("swap-with-index")

	// TODO: handle transport timeout
	resp, err := ki.Set(context.TODO(), key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, PrevIndex: uint64(prevIndex), PrevValue: prevValue})
	if err != nil {
		handleError(ExitServerError, err)
	}

	printResponseKey(resp, c.GlobalString("output"))
}

// removeCommandFunc executes the "rm" command.
func removeCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
	if len(c.Args()) == 0 {
		return nil, errors.New("Key required")
	}
	key := c.Args()[0]
	recursive := c.Bool("recursive")
	dir := c.Bool("dir")

	// TODO: distinguish with flag is not set and empty flag
	// the cli pkg need to provide this feature
	prevValue := c.String("with-value")
	prevIndex := uint64(c.Int("with-index"))

	if prevValue != "" || prevIndex != 0 {
		return client.CompareAndDelete(key, prevValue, prevIndex)
	}

	if recursive || !dir {
		return client.Delete(key, recursive)
	}

	return client.DeleteDir(key)
}