Golang Context.Int方法代码示例

// 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"))
}

// 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")

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

// 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")

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

// 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")

	ctx, cancel := contextWithTotalTimeout(c)
	resp, err := ki.Delete(ctx, key, &client.DeleteOptions{PrevIndex: uint64(prevIndex), PrevValue: prevValue, Dir: dir, Recursive: recursive})
	cancel()
	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")

	ctx, cancel := contextWithTotalTimeout(c)
	resp, err := ki.Set(ctx, key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, PrevIndex: uint64(prevIndex), PrevValue: prevValue})
	cancel()
	if err != nil {
		handleError(ExitServerError, err)
	}

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

// execWatchCommandFunc executes the "exec-watch" command.
func execWatchCommandFunc(c *cli.Context, ki client.KeysAPI) {
	args := c.Args()
	argslen := len(args)

	if argslen < 2 {
		handleError(ExitBadArgs, errors.New("key and command to exec required"))
	}

	var (
		key     string
		cmdArgs []string
	)

	foundSep := false
	for i := range args {
		if args[i] == "--" && i != 0 {
			foundSep = true
			break
		}
	}

	if foundSep {
		key = args[0]
		cmdArgs = args[2:]
	} else {
		// If no flag is parsed, the order of key and cmdArgs will be switched and
		// args will not contain `--`.
		key = args[argslen-1]
		cmdArgs = args[:argslen-1]
	}

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

	recursive := c.Bool("recursive")

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

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

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

	for {
		resp, err := w.Next(context.TODO())
		if err != nil {
			handleError(ExitServerError, err)
		}
		if resp.Node.Dir {
			fmt.Fprintf(os.Stderr, "Ignored dir %s change", resp.Node.Key)
			continue
		}

		cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
		cmd.Env = environResponse(resp, os.Environ())

		stdout, err := cmd.StdoutPipe()
		if err != nil {
			fmt.Fprintf(os.Stderr, err.Error())
			os.Exit(1)
		}
		stderr, err := cmd.StderrPipe()
		if err != nil {
			fmt.Fprintf(os.Stderr, err.Error())
			os.Exit(1)
		}

		go func() {
			err := cmd.Start()
			if err != nil {
				fmt.Fprintf(os.Stderr, err.Error())
				os.Exit(1)
			}
			go io.Copy(os.Stdout, stdout)
			go io.Copy(os.Stderr, stderr)
			cmd.Wait()
		}()
	}
}