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scale.go
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scale.go
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package application
import (
"errors"
"fmt"
"code.cloudfoundry.org/cli/cf/api/applications"
"code.cloudfoundry.org/cli/cf/commandregistry"
"code.cloudfoundry.org/cli/cf/configuration/coreconfig"
"code.cloudfoundry.org/cli/cf/flags"
"code.cloudfoundry.org/cli/cf/formatters"
. "code.cloudfoundry.org/cli/cf/i18n"
"code.cloudfoundry.org/cli/cf/models"
"code.cloudfoundry.org/cli/cf/requirements"
"code.cloudfoundry.org/cli/cf/terminal"
)
type Scale struct {
ui terminal.UI
config coreconfig.Reader
restarter Restarter
appReq requirements.ApplicationRequirement
appRepo applications.Repository
}
func init() {
commandregistry.Register(&Scale{})
}
func (cmd *Scale) MetaData() commandregistry.CommandMetadata {
fs := make(map[string]flags.FlagSet)
fs["i"] = &flags.IntFlag{ShortName: "i", Usage: T("Number of instances")}
fs["k"] = &flags.StringFlag{ShortName: "k", Usage: T("Disk limit (e.g. 256M, 1024M, 1G)")}
fs["m"] = &flags.StringFlag{ShortName: "m", Usage: T("Memory limit (e.g. 256M, 1024M, 1G)")}
fs["f"] = &flags.BoolFlag{ShortName: "f", Usage: T("Force restart of app without prompt")}
return commandregistry.CommandMetadata{
Name: "scale",
Description: T("Change or view the instance count, disk space limit, and memory limit for an app"),
Usage: []string{
T("CF_NAME scale APP_NAME [-i INSTANCES] [-k DISK] [-m MEMORY] [-f]"),
},
Flags: fs,
}
}
func (cmd *Scale) Requirements(requirementsFactory requirements.Factory, fc flags.FlagContext) ([]requirements.Requirement, error) {
if len(fc.Args()) != 1 {
cmd.ui.Failed(T("Incorrect Usage. Requires an argument\n\n") + commandregistry.Commands.CommandUsage("scale"))
return nil, fmt.Errorf("Incorrect usage: %d arguments of %d required", len(fc.Args()), 1)
}
cmd.appReq = requirementsFactory.NewApplicationRequirement(fc.Args()[0])
reqs := []requirements.Requirement{
requirementsFactory.NewLoginRequirement(),
requirementsFactory.NewTargetedSpaceRequirement(),
cmd.appReq,
}
return reqs, nil
}
func (cmd *Scale) SetDependency(deps commandregistry.Dependency, pluginCall bool) commandregistry.Command {
cmd.ui = deps.UI
cmd.config = deps.Config
cmd.appRepo = deps.RepoLocator.GetApplicationRepository()
//get command from registry for dependency
commandDep := commandregistry.Commands.FindCommand("restart")
commandDep = commandDep.SetDependency(deps, false)
cmd.restarter = commandDep.(Restarter)
return cmd
}
var bytesInAMegabyte int64 = 1024 * 1024
func (cmd *Scale) Execute(c flags.FlagContext) error {
currentApp := cmd.appReq.GetApplication()
if !anyFlagsSet(c) {
cmd.ui.Say(T("Showing current scale of app {{.AppName}} in org {{.OrgName}} / space {{.SpaceName}} as {{.CurrentUser}}...",
map[string]interface{}{
"AppName": terminal.EntityNameColor(currentApp.Name),
"OrgName": terminal.EntityNameColor(cmd.config.OrganizationFields().Name),
"SpaceName": terminal.EntityNameColor(cmd.config.SpaceFields().Name),
"CurrentUser": terminal.EntityNameColor(cmd.config.Username()),
}))
cmd.ui.Ok()
cmd.ui.Say("")
cmd.ui.Say("%s %s", terminal.HeaderColor(T("memory:")), formatters.ByteSize(currentApp.Memory*bytesInAMegabyte))
cmd.ui.Say("%s %s", terminal.HeaderColor(T("disk:")), formatters.ByteSize(currentApp.DiskQuota*bytesInAMegabyte))
cmd.ui.Say("%s %d", terminal.HeaderColor(T("instances:")), currentApp.InstanceCount)
return nil
}
params := models.AppParams{}
shouldRestart := false
if c.String("m") != "" {
memory, err := formatters.ToMegabytes(c.String("m"))
if err != nil {
return errors.New(T("Invalid memory limit: {{.Memory}}\n{{.ErrorDescription}}",
map[string]interface{}{
"Memory": c.String("m"),
"ErrorDescription": err,
}))
}
params.Memory = &memory
shouldRestart = true
}
if c.String("k") != "" {
diskQuota, err := formatters.ToMegabytes(c.String("k"))
if err != nil {
return errors.New(T("Invalid disk quota: {{.DiskQuota}}\n{{.ErrorDescription}}",
map[string]interface{}{
"DiskQuota": c.String("k"),
"ErrorDescription": err,
}))
}
params.DiskQuota = &diskQuota
shouldRestart = true
}
if c.IsSet("i") {
instances := c.Int("i")
params.InstanceCount = &instances
}
if shouldRestart && !cmd.confirmRestart(c, currentApp.Name) {
return nil
}
cmd.ui.Say(T("Scaling app {{.AppName}} in org {{.OrgName}} / space {{.SpaceName}} as {{.CurrentUser}}...",
map[string]interface{}{
"AppName": terminal.EntityNameColor(currentApp.Name),
"OrgName": terminal.EntityNameColor(cmd.config.OrganizationFields().Name),
"SpaceName": terminal.EntityNameColor(cmd.config.SpaceFields().Name),
"CurrentUser": terminal.EntityNameColor(cmd.config.Username()),
}))
updatedApp, err := cmd.appRepo.Update(currentApp.GUID, params)
if err != nil {
return err
}
cmd.ui.Ok()
if shouldRestart {
err = cmd.restarter.ApplicationRestart(updatedApp, cmd.config.OrganizationFields().Name, cmd.config.SpaceFields().Name)
if err != nil {
return err
}
}
return nil
}
func (cmd *Scale) confirmRestart(context flags.FlagContext, appName string) bool {
if context.Bool("f") {
return true
}
result := cmd.ui.Confirm(T("This will cause the app to restart. Are you sure you want to scale {{.AppName}}?",
map[string]interface{}{"AppName": terminal.EntityNameColor(appName)}))
cmd.ui.Say("")
return result
}
func anyFlagsSet(context flags.FlagContext) bool {
return context.IsSet("m") || context.IsSet("k") || context.IsSet("i")
}