longganhua
2019-07-18 c610f5adea868e6d46ac63a2b9ffeff2c24225fc
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package syncdb
 
import (
    "os"
    "os/signal"
 
    "basic.com/pubsub/syncdb.git/command/agent"
 
    "basic.com/pubsub/syncdb.git/command"
 
    "github.com/mitchellh/cli"
)
 
// Commands is the mapping of all the available Serf commands.
var Commands map[string]cli.CommandFactory
 
func init() {
    ui := &cli.BasicUi{Writer: os.Stdout}
 
    Commands = map[string]cli.CommandFactory{
        "agent": func() (cli.Command, error) {
            return &agent.Command{
                Ui:         ui,
                ShutdownCh: make(chan struct{}),
            }, nil
        },
 
        "event": func() (cli.Command, error) {
            return &command.EventCommand{
                Ui: ui,
            }, nil
        },
 
        "query": func() (cli.Command, error) {
            return &command.QueryCommand{
                ShutdownCh: makeShutdownCh(),
                Ui:         ui,
            }, nil
        },
 
        "force-leave": func() (cli.Command, error) {
            return &command.ForceLeaveCommand{
                Ui: ui,
            }, nil
        },
 
        "join": func() (cli.Command, error) {
            return &command.JoinCommand{
                Ui: ui,
            }, nil
        },
 
        "keygen": func() (cli.Command, error) {
            return &command.KeygenCommand{
                Ui: ui,
            }, nil
        },
 
        "keys": func() (cli.Command, error) {
            return &command.KeysCommand{
                Ui: ui,
            }, nil
        },
 
        "leave": func() (cli.Command, error) {
            return &command.LeaveCommand{
                Ui: ui,
            }, nil
        },
 
        "members": func() (cli.Command, error) {
            return &command.MembersCommand{
                Ui: ui,
            }, nil
        },
 
        "monitor": func() (cli.Command, error) {
            return &command.MonitorCommand{
                ShutdownCh: makeShutdownCh(),
                Ui:         ui,
            }, nil
        },
 
        "tags": func() (cli.Command, error) {
            return &command.TagsCommand{
                Ui: ui,
            }, nil
        },
 
        "reachability": func() (cli.Command, error) {
            return &command.ReachabilityCommand{
                ShutdownCh: makeShutdownCh(),
                Ui:         ui,
            }, nil
        },
 
        "rtt": func() (cli.Command, error) {
            return &command.RTTCommand{
                Ui: ui,
            }, nil
        },
 
        "info": func() (cli.Command, error) {
            return &command.InfoCommand{
                Ui: ui,
            }, nil
        },
 
        "version": func() (cli.Command, error) {
            return &command.VersionCommand{
                Revision:          GitCommit,
                Version:           Version,
                VersionPrerelease: VersionPrerelease,
                Ui:                ui,
            }, nil
        },
    }
}
 
// makeShutdownCh returns a channel that can be used for shutdown
// notifications for commands. This channel will send a message for every
// interrupt received.
func makeShutdownCh() <-chan struct{} {
    resultCh := make(chan struct{})
 
    signalCh := make(chan os.Signal, 4)
    signal.Notify(signalCh, os.Interrupt)
    go func() {
        for {
            <-signalCh
            resultCh <- struct{}{}
        }
    }()
 
    return resultCh
}