Christian Schwarz
121 lines
2.6 KiB
Go
121 lines
2.6 KiB
Go
package client
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import (
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"context"
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"encoding/json"
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"fmt"
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"strconv"
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"time"
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"github.com/kr/pretty"
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"github.com/pkg/errors"
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"github.com/spf13/pflag"
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"github.com/zrepl/zrepl/cli"
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"github.com/zrepl/zrepl/config"
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"github.com/zrepl/zrepl/daemon"
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"github.com/zrepl/zrepl/daemon/job"
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)
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var waitCmdArgs struct {
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verbose bool
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interval time.Duration
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token string
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}
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var WaitCmd = &cli.Subcommand{
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Use: "wait [-t TOKEN | [replication|snapshotting|prune_sender|prune_receiver JOB]]",
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Short: "",
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Run: func(ctx context.Context, subcommand *cli.Subcommand, args []string) error {
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return runWaitCmd(subcommand.Config(), args)
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},
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SetupFlags: func(f *pflag.FlagSet) {
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f.BoolVarP(&waitCmdArgs.verbose, "verbose", "v", false, "verbose output")
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f.DurationVarP(&waitCmdArgs.interval, "poll-interval", "i", 100*time.Millisecond, "poll interval")
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f.StringVarP(&waitCmdArgs.token, "token", "t", "", "token produced by 'signal' subcommand")
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},
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}
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func runWaitCmd(config *config.Config, args []string) error {
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httpc, err := controlHttpClient(config.Global.Control.SockPath)
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if err != nil {
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return err
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}
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var pollRequest daemon.ControlJobEndpointSignalActiveRequest
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if waitCmdArgs.token != "" {
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if len(args) != 0 {
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return fmt.Errorf("-t and regular usage is mutually exclusive")
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}
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err := json.Unmarshal([]byte(waitCmdArgs.token), &pollRequest)
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if err != nil {
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return errors.Wrap(err, "cannot unmarshal token")
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}
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} else {
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if args[0] != "active" {
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panic(args)
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}
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args = args[1:]
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jobName := args[0]
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invocationId, err := strconv.ParseUint(args[1], 10, 64)
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if err != nil {
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return errors.Wrap(err, "parse invocation id")
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}
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waitWhat := args[2]
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// updated by subsequent requests
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pollRequest = daemon.ControlJobEndpointSignalActiveRequest{
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Job: jobName,
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ActiveSidePollRequest: job.ActiveSidePollRequest{
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InvocationId: invocationId,
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What: waitWhat,
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},
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}
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}
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doneErr := fmt.Errorf("done")
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pollOnce := func() error {
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var res job.ActiveSidePollResponse
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if waitCmdArgs.verbose {
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pretty.Println("making poll request", pollRequest)
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}
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err = jsonRequestResponse(httpc, daemon.ControlJobEndpointPollActive,
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pollRequest,
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&res,
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)
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if err != nil {
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return err
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}
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if waitCmdArgs.verbose {
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pretty.Println("got poll response", res)
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}
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if res.Done {
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return doneErr
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}
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pollRequest.InvocationId = res.InvocationId
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return nil
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}
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t := time.NewTicker(waitCmdArgs.interval)
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for range t.C {
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err := pollOnce()
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if err == doneErr {
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return nil
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} else if err != nil {
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return err
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}
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}
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return err
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}
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