// SignalService sends the given signal to the given service (by name) of the remote caretakerd instance.
func (instance *Client) SignalService(name string, s values.Signal) error {
payload := map[string]string{
"signal": s.String(),
}
err := instance.post("service/"+name+"/signal", &payload)
if _, ok := err.(ConflictError); ok {
return ConflictError{error: "Service '" + name + "' is down."}
}
return err
}
func createSignalServiceCommand(commonClientFlags []cli.Flag, clientFactory *client.Factory) cli.Command {
return cli.Command{
Name: "serviceSignal",
Flags: commonClientFlags,
ArgsUsage: "<service name> <signal>",
Aliases: []string{"signal"},
Usage: "Send a signal to service.",
Before: ensureServiceNameAndSignalArgument,
Action: actionWrapper(clientFactory, func(context *cli.Context, client *client.Client) error {
args := context.Args()
name := args[0]
var sig values.Signal
err := sig.Set(args[1])
if err != nil {
return UsageError{error: err.Error()}
}
return client.SignalService(name, sig)
}),
OnUsageError: onUsageErrorFor("serviceSignal"),
}
}
func ensureServiceNameAndSignalArgument(context *cli.Context) error {
err := baseControlEnsure(context)
if err != nil {
return err
}
args := context.Args()
if (len(args) <= 0) || (len(strings.TrimSpace(args[0])) == 0) {
return UsageError{error: "There is no service name provided."}
}
if (len(args) <= 1) || (len(strings.TrimSpace(args[1])) == 0) {
return UsageError{error: "There is no signal provided."}
}
var sig values.Signal
err = sig.Set(args[1])
if err != nil {
return UsageError{error: err.Error()}
}
if len(args) > 2 {
return UsageError{error: "There are only two arguments allowed."}
}
return nil
}