Golang util.ParseConnectionString函數代碼示例

func main() {
	go signals.Handle()
	// initialize command-line opts
	opts := options.New("mongofiles", mongofiles.Usage, options.EnabledOptions{Auth: true, Connection: true, Namespace: false})

	storageOpts := &mongofiles.StorageOptions{}
	opts.AddOptions(storageOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logf(log.Always, "error parsing command line options: %v", err)
		log.Logf(log.Always, "try 'mongofiles --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}
	log.SetVerbosity(opts.Verbosity)

	// add the specified database to the namespace options struct
	opts.Namespace.DB = storageOpts.DB

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	// create a session provider to connect to the db
	provider, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logf(log.Always, "error connecting to host: %v", err)
		os.Exit(util.ExitError)
	}
	mf := mongofiles.MongoFiles{
		ToolOptions:     opts,
		StorageOptions:  storageOpts,
		SessionProvider: provider,
	}

	if err := mf.ValidateCommand(args); err != nil {
		log.Logf(log.Always, "%v", err)
		log.Logf(log.Always, "try 'mongofiles --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	output, err := mf.Run(true)
	if err != nil {
		log.Logf(log.Always, "Failed: %v", err)
		os.Exit(util.ExitError)
	}
	fmt.Printf("%s", output)
}

func main() {
	// initialize command-line opts
	opts := options.New("mongodump", mongodump.Usage, options.EnabledOptions{true, true, true})

	inputOpts := &mongodump.InputOptions{}
	opts.AddOptions(inputOpts)
	outputOpts := &mongodump.OutputOptions{}
	opts.AddOptions(outputOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logf(log.Always, "error parsing command line options: %v", err)
		log.Logf(log.Always, "try 'mongodump --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	if len(args) > 0 {
		log.Logf(log.Always, "positional arguments not allowed: %v", args)
		log.Logf(log.Always, "try 'mongodump --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	// init logger
	log.SetVerbosity(opts.Verbosity)

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	dump := mongodump.MongoDump{
		ToolOptions:   opts,
		OutputOptions: outputOpts,
		InputOptions:  inputOpts,
	}

	if err = dump.Init(); err != nil {
		log.Logf(log.Always, "Failed: %v", err)
		os.Exit(util.ExitError)
	}

	if err = dump.Dump(); err != nil {
		log.Logf(log.Always, "Failed: %v", err)
		if err == util.ErrTerminated {
			os.Exit(util.ExitKill)
		}
		os.Exit(util.ExitError)
	}
}

func main() {
	go signals.Handle()

	// initialize command line options
	opts := options.New("mongooplog", mongooplog.Usage,
		options.EnabledOptions{Auth: true, Connection: true, Namespace: false})

	// add the mongooplog-specific options
	sourceOpts := &mongooplog.SourceOptions{}
	opts.AddOptions(sourceOpts)

	log.Logf(log.Always, "warning: mongooplog is deprecated, and will be removed completely in a future release")

	// parse the command line options
	args, err := opts.Parse()
	if err != nil {
		log.Logf(log.Always, "error parsing command line options: %v", err)
		log.Logf(log.Always, "try 'mongooplog --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	if len(args) != 0 {
		log.Logf(log.Always, "positional arguments not allowed: %v", args)
		log.Logf(log.Always, "try 'mongooplog --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	// init logger
	log.SetVerbosity(opts.Verbosity)

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	// validate the mongooplog options
	if sourceOpts.From == "" {
		log.Logf(log.Always, "command line error: need to specify --from")
		os.Exit(util.ExitBadOptions)
	}

	// create a session provider for the destination server
	sessionProviderTo, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logf(log.Always, "error connecting to destination host: %v", err)
		os.Exit(util.ExitError)
	}

	// create a session provider for the source server
	opts.Connection.Host = sourceOpts.From
	opts.Connection.Port = ""
	sessionProviderFrom, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logf(log.Always, "error connecting to source host: %v", err)
		os.Exit(util.ExitError)
	}

	// initialize mongooplog
	oplog := mongooplog.MongoOplog{
		ToolOptions:         opts,
		SourceOptions:       sourceOpts,
		SessionProviderFrom: sessionProviderFrom,
		SessionProviderTo:   sessionProviderTo,
	}

	// kick it off
	if err := oplog.Run(); err != nil {
		log.Logf(log.Always, "error: %v", err)
		os.Exit(util.ExitError)
	}

}

func main() {
	// initialize command-line opts
	opts := options.New("mongotop", mongotop.Usage,
		options.EnabledOptions{Auth: true, Connection: true, Namespace: false})
	opts.UseReadOnlyHostDescription()

	// add mongotop-specific options
	outputOpts := &mongotop.Output{}
	opts.AddOptions(outputOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logvf(log.Always, "error parsing command line options: %v", err)
		log.Logvf(log.Always, "try 'mongotop --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	log.SetVerbosity(opts.Verbosity)
	signals.Handle()

	if len(args) > 1 {
		log.Logvf(log.Always, "too many positional arguments")
		log.Logvf(log.Always, "try 'mongotop --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	sleeptime := 1 // default to 1 second sleep time
	if len(args) > 0 {
		sleeptime, err = strconv.Atoi(args[0])
		if err != nil || sleeptime <= 0 {
			log.Logvf(log.Always, "invalid sleep time: %v", args[0])
			os.Exit(util.ExitBadOptions)
		}
	}
	if outputOpts.RowCount < 0 {
		log.Logvf(log.Always, "invalid value for --rowcount: %v", outputOpts.RowCount)
		os.Exit(util.ExitBadOptions)
	}

	if opts.Auth.Username != "" && opts.Auth.Source == "" && !opts.Auth.RequiresExternalDB() {
		log.Logvf(log.Always, "--authenticationDatabase is required when authenticating against a non $external database")
		os.Exit(util.ExitBadOptions)
	}

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	// create a session provider to connect to the db
	sessionProvider, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logvf(log.Always, "error connecting to host: %v", err)
		os.Exit(util.ExitError)
	}

	if setName == "" {
		sessionProvider.SetReadPreference(mgo.PrimaryPreferred)
	}

	// fail fast if connecting to a mongos
	isMongos, err := sessionProvider.IsMongos()
	if err != nil {
		log.Logvf(log.Always, "Failed: %v", err)
		os.Exit(util.ExitError)
	}
	if isMongos {
		log.Logvf(log.Always, "cannot run mongotop against a mongos")
		os.Exit(util.ExitError)
	}

	// instantiate a mongotop instance
	top := &mongotop.MongoTop{
		Options:         opts,
		OutputOptions:   outputOpts,
		SessionProvider: sessionProvider,
		Sleeptime:       time.Duration(sleeptime) * time.Second,
	}

	// kick it off
	if err := top.Run(); err != nil {
		log.Logvf(log.Always, "Failed: %v", err)
		os.Exit(util.ExitError)
	}
}

func main() {
	// initialize command-line opts
	opts := options.New("mongoexport", mongoexport.Usage,
		options.EnabledOptions{Auth: true, Connection: true, Namespace: true})

	outputOpts := &mongoexport.OutputFormatOptions{}
	opts.AddOptions(outputOpts)
	inputOpts := &mongoexport.InputOptions{}
	opts.AddOptions(inputOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logvf(log.Always, "error parsing command line options: %v", err)
		log.Logvf(log.Always, "try 'mongoexport --help' for more information")
		os.Exit(util.ExitBadOptions)
	}
	if len(args) != 0 {
		log.Logvf(log.Always, "too many positional arguments: %v", args)
		log.Logvf(log.Always, "try 'mongoexport --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	log.SetVerbosity(opts.Verbosity)
	signals.Handle()

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	provider, err := db.NewSessionProvider(*opts)

	// temporarily allow secondary reads for the isMongos check
	provider.SetReadPreference(mgo.Nearest)
	isMongos, err := provider.IsMongos()
	if err != nil {
		log.Logvf(log.Always, "%v", err)
		os.Exit(util.ExitError)
	}

	provider.SetFlags(db.DisableSocketTimeout)

	if inputOpts.SlaveOk {
		if inputOpts.ReadPreference != "" {
			log.Logvf(log.Always, "--slaveOk can't be specified when --readPreference is specified")
			os.Exit(util.ExitBadOptions)
		}
		log.Logvf(log.Always, "--slaveOk is deprecated and being internally rewritten as --readPreference=nearest")
		inputOpts.ReadPreference = "nearest"
	}

	var mode mgo.Mode
	if opts.ReplicaSetName != "" || isMongos {
		mode = mgo.Primary
	} else {
		mode = mgo.Nearest
	}
	var tags bson.D
	if inputOpts.ReadPreference != "" {
		mode, tags, err = db.ParseReadPreference(inputOpts.ReadPreference)
		if err != nil {
			log.Logvf(log.Always, "error parsing --ReadPreference: %v", err)
			os.Exit(util.ExitBadOptions)
		}
		if len(tags) > 0 {
			provider.SetTags(tags)
		}
	}

	// warn if we are trying to export from a secondary in a sharded cluster
	if isMongos && mode != mgo.Primary {
		log.Logvf(log.Always, db.WarningNonPrimaryMongosConnection)
	}

	provider.SetReadPreference(mode)

	if err != nil {
		log.Logvf(log.Always, "error connecting to host: %v", err)
		os.Exit(util.ExitError)
	}
	exporter := mongoexport.MongoExport{
		ToolOptions:     *opts,
		OutputOpts:      outputOpts,
		InputOpts:       inputOpts,
		SessionProvider: provider,
	}

	err = exporter.ValidateSettings()
	if err != nil {
		log.Logvf(log.Always, "error validating settings: %v", err)
//.........這裏部分代碼省略.........

func main() {
	// initialize command-line opts
	opts := options.New("mongorestore", mongorestore.Usage,
		options.EnabledOptions{Auth: true, Connection: true})
	nsOpts := &mongorestore.NSOptions{}
	opts.AddOptions(nsOpts)
	inputOpts := &mongorestore.InputOptions{}
	opts.AddOptions(inputOpts)
	outputOpts := &mongorestore.OutputOptions{}
	opts.AddOptions(outputOpts)

	extraArgs, err := opts.Parse()
	if err != nil {
		log.Logvf(log.Always, "error parsing command line options: %v", err)
		log.Logvf(log.Always, "try 'mongorestore --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	// Allow the db connector to fall back onto the current database when no
	// auth database is given; the standard -d/-c options go into nsOpts now
	opts.Namespace = &options.Namespace{DB: nsOpts.DB}

	// print help or version info, if specified
	if opts.PrintHelp(false) {
		return
	}

	if opts.PrintVersion() {
		return
	}

	log.SetVerbosity(opts.Verbosity)

	targetDir, err := getTargetDirFromArgs(extraArgs, inputOpts.Directory)
	if err != nil {
		log.Logvf(log.Always, "%v", err)
		log.Logvf(log.Always, "try 'mongorestore --help' for more information")
		os.Exit(util.ExitBadOptions)
	}
	targetDir = util.ToUniversalPath(targetDir)

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	provider, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logvf(log.Always, "error connecting to host: %v", err)
		os.Exit(util.ExitError)
	}
	provider.SetBypassDocumentValidation(outputOpts.BypassDocumentValidation)

	// disable TCP timeouts for restore jobs
	provider.SetFlags(db.DisableSocketTimeout)
	restore := mongorestore.MongoRestore{
		ToolOptions:     opts,
		OutputOptions:   outputOpts,
		InputOptions:    inputOpts,
		NSOptions:       nsOpts,
		TargetDirectory: targetDir,
		SessionProvider: provider,
	}

	finishedChan := signals.HandleWithInterrupt(restore.HandleInterrupt)
	defer close(finishedChan)

	if err = restore.Restore(); err != nil {
		log.Logvf(log.Always, "Failed: %v", err)
		if err == util.ErrTerminated {
			os.Exit(util.ExitKill)
		}
		os.Exit(util.ExitError)
	}
}

func main() {
	// initialize command-line opts
	opts := options.New("mongorestore", mongorestore.Usage,
		options.EnabledOptions{Auth: true, Connection: true, Namespace: true})
	inputOpts := &mongorestore.InputOptions{}
	opts.AddOptions(inputOpts)
	outputOpts := &mongorestore.OutputOptions{}
	opts.AddOptions(outputOpts)

	extraArgs, err := opts.Parse()
	if err != nil {
		log.Logf(log.Always, "error parsing command line options: %v", err)
		log.Logf(log.Always, "try 'mongorestore --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	// print help or version info, if specified
	if opts.PrintHelp(false) {
		return
	}

	if opts.PrintVersion() {
		return
	}

	log.SetVerbosity(opts.Verbosity)

	targetDir, err := getTargetDirFromArgs(extraArgs, inputOpts.Directory)
	if err != nil {
		log.Logf(log.Always, "%v", err)
		log.Logf(log.Always, "try 'mongorestore --help' for more information")
		os.Exit(util.ExitBadOptions)
	}
	targetDir = util.ToUniversalPath(targetDir)

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	provider, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logf(log.Always, "error connecting to host: %v", err)
		os.Exit(util.ExitError)
	}
	provider.SetBypassDocumentValidation(outputOpts.BypassDocumentValidation)

	// disable TCP timeouts for restore jobs
	provider.SetFlags(db.DisableSocketTimeout)
	restore := mongorestore.MongoRestore{
		ToolOptions:     opts,
		OutputOptions:   outputOpts,
		InputOptions:    inputOpts,
		TargetDirectory: targetDir,
		SessionProvider: provider,
	}

	if err = restore.Restore(); err != nil {
		log.Logf(log.Always, "Failed: %v", err)
		if err == util.ErrTerminated {
			os.Exit(util.ExitKill)
		}
		os.Exit(util.ExitError)
	}
}

func main() {
	go signals.Handle()
	// initialize command-line opts
	opts := options.New("mongoexport", mongoexport.Usage,
		options.EnabledOptions{Auth: true, Connection: true, Namespace: true})

	outputOpts := &mongoexport.OutputFormatOptions{}
	opts.AddOptions(outputOpts)
	inputOpts := &mongoexport.InputOptions{}
	opts.AddOptions(inputOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logf(log.Always, "error parsing command line options: %v", err)
		log.Logf(log.Always, "try 'mongoexport --help' for more information")
		os.Exit(util.ExitBadOptions)
	}
	if len(args) != 0 {
		log.Logf(log.Always, "too many positional arguments: %v", args)
		log.Logf(log.Always, "try 'mongoexport --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	log.SetVerbosity(opts.Verbosity)

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	provider, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logf(log.Always, "error connecting to host: %v", err)
		os.Exit(util.ExitError)
	}
	exporter := mongoexport.MongoExport{
		ToolOptions:     *opts,
		OutputOpts:      outputOpts,
		InputOpts:       inputOpts,
		SessionProvider: provider,
	}

	err = exporter.ValidateSettings()
	if err != nil {
		log.Logf(log.Always, "error validating settings: %v", err)
		log.Logf(log.Always, "try 'mongoexport --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	writer, err := exporter.GetOutputWriter()
	if err != nil {
		log.Logf(log.Always, "error opening output stream: %v", err)
		os.Exit(util.ExitError)
	}
	if writer == nil {
		writer = os.Stdout
	} else {
		defer writer.Close()
	}

	numDocs, err := exporter.Export(writer)
	if err != nil {
		log.Logf(log.Always, "Failed: %v", err)
		os.Exit(util.ExitError)
	}

	if numDocs == 1 {
		log.Logf(log.Always, "exported %v record", numDocs)
	} else {
		log.Logf(log.Always, "exported %v records", numDocs)
	}

}

func main() {
	// initialize command-line opts
	opts := options.New("mongodump", mongodump.Usage, options.EnabledOptions{true, true, true})

	inputOpts := &mongodump.InputOptions{}
	opts.AddOptions(inputOpts)
	outputOpts := &mongodump.OutputOptions{}
	opts.AddOptions(outputOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logvf(log.Always, "error parsing command line options: %v", err)
		log.Logvf(log.Always, "try 'mongodump --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	if len(args) > 0 {
		log.Logvf(log.Always, "positional arguments not allowed: %v", args)
		log.Logvf(log.Always, "try 'mongodump --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	// init logger
	log.SetVerbosity(opts.Verbosity)

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	// kick off the progress bar manager
	progressManager := progress.NewBarWriter(log.Writer(0), progressBarWaitTime, progressBarLength, false)
	progressManager.Start()
	defer progressManager.Stop()

	dump := mongodump.MongoDump{
		ToolOptions:     opts,
		OutputOptions:   outputOpts,
		InputOptions:    inputOpts,
		ProgressManager: progressManager,
	}

	finishedChan := signals.HandleWithInterrupt(dump.HandleInterrupt)
	defer close(finishedChan)

	if err = dump.Init(); err != nil {
		log.Logvf(log.Always, "Failed: %v", err)
		os.Exit(util.ExitError)
	}

	if err = dump.Dump(); err != nil {
		log.Logvf(log.Always, "Failed: %v", err)
		if err == util.ErrTerminated {
			os.Exit(util.ExitKill)
		}
		os.Exit(util.ExitError)
	}
}

//.........這裏部分代碼省略.........
	if statOpts.Json {
		factory = stat_consumer.FormatterConstructors["json"]
	} else if statOpts.Interactive {
		factory = stat_consumer.FormatterConstructors["interactive"]
	} else {
		factory = stat_consumer.FormatterConstructors[""]
	}
	formatter := factory(statOpts.RowCount, !statOpts.NoHeaders)

	cliFlags := 0
	if statOpts.Columns == "" {
		cliFlags = line.FlagAlways
		if statOpts.Discover {
			cliFlags |= line.FlagDiscover
			cliFlags |= line.FlagHosts
		}
		if statOpts.All {
			cliFlags |= line.FlagAll
		}
		if strings.Contains(opts.Host, ",") {
			cliFlags |= line.FlagHosts
		}
	}

	var customHeaders []string
	if statOpts.Columns != "" {
		customHeaders = optionCustomHeaders(statOpts.Columns)
	} else if statOpts.AppendColumns != "" {
		customHeaders = optionCustomHeaders(statOpts.AppendColumns)
	}

	var keyNames map[string]string
	if statOpts.Deprecated {
		keyNames = line.DeprecatedKeyMap()
	} else if statOpts.Columns == "" {
		keyNames = line.DefaultKeyMap()
	} else {
		keyNames = optionKeyNames(statOpts.Columns)
	}
	if statOpts.AppendColumns != "" {
		addKN := optionKeyNames(statOpts.AppendColumns)
		for k, v := range addKN {
			keyNames[k] = v
		}
	}

	readerConfig := &status.ReaderConfig{
		HumanReadable: statOpts.HumanReadable == "true",
	}
	if statOpts.Json {
		readerConfig.TimeFormat = "15:04:05"
	}

	consumer := stat_consumer.NewStatConsumer(cliFlags, customHeaders,
		keyNames, readerConfig, formatter, os.Stdout)
	seedHosts := util.CreateConnectionAddrs(opts.Host, opts.Port)
	var cluster mongostat.ClusterMonitor
	if statOpts.Discover || len(seedHosts) > 1 {
		cluster = &mongostat.AsyncClusterMonitor{
			ReportChan:    make(chan *status.ServerStatus),
			ErrorChan:     make(chan *status.NodeError),
			LastStatLines: map[string]*line.StatLine{},
			Consumer:      consumer,
		}
	} else {
		cluster = &mongostat.SyncClusterMonitor{
			ReportChan: make(chan *status.ServerStatus),
			ErrorChan:  make(chan *status.NodeError),
			Consumer:   consumer,
		}
	}

	var discoverChan chan string
	if statOpts.Discover {
		discoverChan = make(chan string, 128)
	}

	opts.Direct = true
	_, setName := util.ParseConnectionString(opts.Host)
	opts.ReplicaSetName = setName
	stat := &mongostat.MongoStat{
		Options:       opts,
		StatOptions:   statOpts,
		Nodes:         map[string]*mongostat.NodeMonitor{},
		Discovered:    discoverChan,
		SleepInterval: time.Duration(sleepInterval) * time.Second,
		Cluster:       cluster,
	}

	for _, v := range seedHosts {
		stat.AddNewNode(v)
	}

	// kick it off
	err = stat.Run()
	if err != nil {
		log.Logvf(log.Always, "Failed: %v", err)
		os.Exit(util.ExitError)
	}
}

func main() {
	go signals.Handle()
	// initialize command-line opts
	opts := options.New(
		"mongostat",
		mongostat.Usage,
		options.EnabledOptions{Connection: true, Auth: true, Namespace: false})

	// add mongostat-specific options
	statOpts := &mongostat.StatOptions{}
	opts.AddOptions(statOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logf(log.Always, "error parsing command line options: %v", err)
		log.Logf(log.Always, "try 'mongostat --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	log.SetVerbosity(opts.Verbosity)

	sleepInterval := 1
	if len(args) > 0 {
		if len(args) != 1 {
			log.Logf(log.Always, "too many positional arguments: %v", args)
			log.Logf(log.Always, "try 'mongostat --help' for more information")
			os.Exit(util.ExitBadOptions)
		}
		sleepInterval, err = strconv.Atoi(args[0])
		if err != nil {
			log.Logf(log.Always, "invalid sleep interval: %v", args[0])
			os.Exit(util.ExitBadOptions)
		}
		if sleepInterval < 1 {
			log.Logf(log.Always, "sleep interval must be at least 1 second")
			os.Exit(util.ExitBadOptions)
		}
	}

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	if opts.Auth.Username != "" && opts.Auth.Source == "" && !opts.Auth.RequiresExternalDB() {
		log.Logf(log.Always, "--authenticationDatabase is required when authenticating against a non $external database")
		os.Exit(util.ExitBadOptions)
	}

	// we have to check this here, otherwise the user will be prompted
	// for a password for each discovered node
	if opts.Auth.ShouldAskForPassword() {
		opts.Auth.Password = password.Prompt()
	}

	var formatter mongostat.LineFormatter
	if statOpts.Json {
		formatter = &mongostat.JSONLineFormatter{}
	} else {
		formatter = &mongostat.GridLineFormatter{
			IncludeHeader:  !statOpts.NoHeaders,
			HeaderInterval: 10,
			Writer:         &text.GridWriter{ColumnPadding: 1},
		}
	}

	seedHosts := util.CreateConnectionAddrs(opts.Host, opts.Port)
	var cluster mongostat.ClusterMonitor
	if statOpts.Discover || len(seedHosts) > 1 {
		cluster = &mongostat.AsyncClusterMonitor{
			ReportChan:    make(chan mongostat.StatLine),
			LastStatLines: map[string]*mongostat.StatLine{},
			Formatter:     formatter,
		}
	} else {
		cluster = &mongostat.SyncClusterMonitor{
			ReportChan: make(chan mongostat.StatLine),
			Formatter:  formatter,
		}
	}

	var discoverChan chan string
	if statOpts.Discover {
		discoverChan = make(chan string, 128)
	}

	opts.Direct = true
	_, setName := util.ParseConnectionString(opts.Host)
	opts.ReplicaSetName = setName
	stat := &mongostat.MongoStat{
		Options:       opts,
		StatOptions:   statOpts,
		Nodes:         map[string]*mongostat.NodeMonitor{},
		Discovered:    discoverChan,
		SleepInterval: time.Duration(sleepInterval) * time.Second,
//.........這裏部分代碼省略.........

func main() {
	go signals.Handle()
	// initialize command-line opts
	opts := options.New("mongoimport", mongoimport.Usage,
		options.EnabledOptions{Auth: true, Connection: true, Namespace: true})

	inputOpts := &mongoimport.InputOptions{}
	opts.AddOptions(inputOpts)
	ingestOpts := &mongoimport.IngestOptions{}
	opts.AddOptions(ingestOpts)

	args, err := opts.Parse()
	if err != nil {
		log.Logf(log.Always, "error parsing command line options: %v", err)
		log.Logf(log.Always, "try 'mongoimport --help' for more information")
		os.Exit(util.ExitBadOptions)
	}

	log.SetVerbosity(opts.Verbosity)

	// print help, if specified
	if opts.PrintHelp(false) {
		return
	}

	// print version, if specified
	if opts.PrintVersion() {
		return
	}

	// connect directly, unless a replica set name is explicitly specified
	_, setName := util.ParseConnectionString(opts.Host)
	opts.Direct = (setName == "")
	opts.ReplicaSetName = setName

	// create a session provider to connect to the db
	sessionProvider, err := db.NewSessionProvider(*opts)
	if err != nil {
		log.Logf(log.Always, "error connecting to host: %v", err)
		os.Exit(util.ExitError)
	}

	m := mongoimport.MongoImport{
		ToolOptions:     opts,
		InputOptions:    inputOpts,
		IngestOptions:   ingestOpts,
		SessionProvider: sessionProvider,
	}

	if err = m.ValidateSettings(args); err != nil {
		log.Logf(log.Always, "error validating settings: %v", err)
		log.Logf(log.Always, "try 'mongoimport --help' for more information")
		os.Exit(util.ExitError)
	}

	numDocs, err := m.ImportDocuments()
	if !opts.Quiet {
		if err != nil {
			log.Logf(log.Always, "Failed: %v", err)
		}
		message := fmt.Sprintf("imported 1 document")
		if numDocs != 1 {
			message = fmt.Sprintf("imported %v documents", numDocs)
		}
		log.Logf(log.Always, message)
	}
	if err != nil {
		os.Exit(util.ExitError)
	}
}