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start.go
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start.go
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package application
import (
"fmt"
. "github.com/cloudfoundry/cli/cf/i18n"
"os"
"regexp"
"strconv"
"strings"
"time"
"github.com/cloudfoundry/cli/cf"
"github.com/cloudfoundry/cli/cf/api"
"github.com/cloudfoundry/cli/cf/command_metadata"
"github.com/cloudfoundry/cli/cf/configuration"
"github.com/cloudfoundry/cli/cf/errors"
"github.com/cloudfoundry/cli/cf/models"
"github.com/cloudfoundry/cli/cf/requirements"
"github.com/cloudfoundry/cli/cf/terminal"
"github.com/cloudfoundry/loggregatorlib/logmessage"
"github.com/codegangsta/cli"
)
const (
DefaultStagingTimeout = 15 * time.Minute
DefaultStartupTimeout = 5 * time.Minute
DefaultPingerThrottle = 5 * time.Second
)
const LogMessageTypeStaging = "STG"
type Start struct {
ui terminal.UI
config configuration.Reader
appDisplayer ApplicationDisplayer
appReq requirements.ApplicationRequirement
appRepo api.ApplicationRepository
appInstancesRepo api.AppInstancesRepository
logRepo api.LogsRepository
StartupTimeout time.Duration
StagingTimeout time.Duration
PingerThrottle time.Duration
}
type ApplicationStarter interface {
SetStartTimeoutInSeconds(timeout int)
ApplicationStart(app models.Application) (updatedApp models.Application, err error)
}
type ApplicationStagingWatcher interface {
ApplicationWatchStaging(app models.Application, startCommand func(app models.Application) (models.Application, error)) (updatedApp models.Application, err error)
}
func NewStart(ui terminal.UI, config configuration.Reader, appDisplayer ApplicationDisplayer, appRepo api.ApplicationRepository, appInstancesRepo api.AppInstancesRepository, logRepo api.LogsRepository) (cmd *Start) {
cmd = new(Start)
cmd.ui = ui
cmd.config = config
cmd.appDisplayer = appDisplayer
cmd.appRepo = appRepo
cmd.appInstancesRepo = appInstancesRepo
cmd.logRepo = logRepo
cmd.PingerThrottle = DefaultPingerThrottle
if os.Getenv("CF_STAGING_TIMEOUT") != "" {
duration, err := strconv.ParseInt(os.Getenv("CF_STAGING_TIMEOUT"), 10, 64)
if err != nil {
cmd.ui.Failed(T("invalid value for env var CF_STAGING_TIMEOUT\n{{.Err}}",
map[string]interface{}{"Err": err}))
}
cmd.StagingTimeout = time.Duration(duration) * time.Minute
} else {
cmd.StagingTimeout = DefaultStagingTimeout
}
if os.Getenv("CF_STARTUP_TIMEOUT") != "" {
duration, err := strconv.ParseInt(os.Getenv("CF_STARTUP_TIMEOUT"), 10, 64)
if err != nil {
cmd.ui.Failed(T("invalid value for env var CF_STARTUP_TIMEOUT\n{{.Err}}",
map[string]interface{}{"Err": err}))
}
cmd.StartupTimeout = time.Duration(duration) * time.Minute
} else {
cmd.StartupTimeout = DefaultStartupTimeout
}
return
}
func (cmd *Start) Metadata() command_metadata.CommandMetadata {
return command_metadata.CommandMetadata{
Name: "start",
ShortName: "st",
Description: T("Start an app"),
Usage: T("CF_NAME start APP"),
}
}
func (cmd *Start) GetRequirements(requirementsFactory requirements.Factory, c *cli.Context) (reqs []requirements.Requirement, err error) {
if len(c.Args()) == 0 {
cmd.ui.FailWithUsage(c)
}
cmd.appReq = requirementsFactory.NewApplicationRequirement(c.Args()[0])
reqs = []requirements.Requirement{requirementsFactory.NewLoginRequirement(), cmd.appReq}
return
}
func (cmd *Start) Run(c *cli.Context) {
cmd.ApplicationStart(cmd.appReq.GetApplication())
}
func (cmd *Start) ApplicationStart(app models.Application) (updatedApp models.Application, err error) {
if app.State == "started" {
cmd.ui.Say(terminal.WarningColor(T("App ") + app.Name + T(" is already started")))
return
}
return cmd.ApplicationWatchStaging(app, func(app models.Application) (models.Application, error) {
cmd.ui.Say(T("Starting app {{.AppName}} in org {{.OrgName}} / space {{.SpaceName}} as {{.CurrentUser}}...",
map[string]interface{}{
"AppName": terminal.EntityNameColor(app.Name),
"OrgName": terminal.EntityNameColor(cmd.config.OrganizationFields().Name),
"SpaceName": terminal.EntityNameColor(cmd.config.SpaceFields().Name),
"CurrentUser": terminal.EntityNameColor(cmd.config.Username())}))
state := "STARTED"
return cmd.appRepo.Update(app.Guid, models.AppParams{State: &state})
})
}
func (cmd *Start) ApplicationWatchStaging(app models.Application, start func(app models.Application) (models.Application, error)) (updatedApp models.Application, err error) {
stopLoggingChan := make(chan bool, 1)
loggingStartedChan := make(chan bool)
doneLoggingChan := make(chan bool)
go cmd.tailStagingLogs(app, loggingStartedChan, doneLoggingChan)
go func() {
<-stopLoggingChan
cmd.logRepo.Close()
}()
<-loggingStartedChan // block until we have established connection to Loggregator
updatedApp, apiErr := start(app)
if apiErr != nil {
cmd.ui.Failed(apiErr.Error())
return
}
cmd.ui.Ok()
cmd.waitForInstancesToStage(updatedApp)
stopLoggingChan <- true
<-doneLoggingChan
cmd.ui.Say("")
cmd.waitForOneRunningInstance(updatedApp)
cmd.ui.Say(terminal.HeaderColor(T("\nApp started\n")))
cmd.appDisplayer.ShowApp(updatedApp)
return
}
func (cmd *Start) SetStartTimeoutInSeconds(timeout int) {
cmd.StartupTimeout = time.Duration(timeout) * time.Second
}
func simpleLogMessageOutput(logMsg *logmessage.LogMessage) (msgText string) {
msgText = string(logMsg.GetMessage())
reg, err := regexp.Compile("[\n\r]+$")
if err != nil {
return
}
msgText = reg.ReplaceAllString(msgText, "")
return
}
func (cmd Start) tailStagingLogs(app models.Application, startChan, doneChan chan bool) {
onConnect := func() {
startChan <- true
}
err := cmd.logRepo.TailLogsFor(app.Guid, onConnect, func(msg *logmessage.LogMessage) {
if msg.GetSourceName() == LogMessageTypeStaging {
cmd.ui.Say(simpleLogMessageOutput(msg))
}
})
if err != nil {
cmd.ui.Warn(T("Warning: error tailing logs"))
cmd.ui.Say("%s", err)
startChan <- true
}
close(doneChan)
}
func isStagingError(err error) bool {
httpError, ok := err.(errors.HttpError)
return ok && httpError.ErrorCode() == errors.APP_NOT_STAGED
}
func (cmd Start) waitForInstancesToStage(app models.Application) {
stagingStartTime := time.Now()
_, err := cmd.appInstancesRepo.GetInstances(app.Guid)
for isStagingError(err) && time.Since(stagingStartTime) < cmd.StagingTimeout {
cmd.ui.Wait(cmd.PingerThrottle)
_, err = cmd.appInstancesRepo.GetInstances(app.Guid)
}
if err != nil && !isStagingError(err) {
cmd.ui.Say("")
cmd.ui.Failed(T("{{.Err}}\n\nTIP: use '{{.Command}}' for more information",
map[string]interface{}{
"Err": err.Error(),
"Command": terminal.CommandColor(fmt.Sprintf("%s logs %s --recent", cf.Name(), app.Name))}))
}
return
}
func (cmd Start) waitForOneRunningInstance(app models.Application) {
startupStartTime := time.Now()
for {
if time.Since(startupStartTime) > cmd.StartupTimeout {
cmd.ui.Failed(fmt.Sprintf(T("Start app timeout\n\nTIP: use '{{.Command}}' for more information",
map[string]interface{}{
"Command": terminal.CommandColor(fmt.Sprintf("%s logs %s --recent", cf.Name(), app.Name))})))
return
}
count, err := cmd.fetchInstanceCount(app.Guid)
if err != nil {
cmd.ui.Wait(cmd.PingerThrottle)
continue
}
cmd.ui.Say(instancesDetails(count))
if count.running > 0 {
return
}
if count.flapping > 0 {
cmd.ui.Failed(fmt.Sprintf(T("Start unsuccessful\n\nTIP: use '{{.Command}}' for more information",
map[string]interface{}{"Command": terminal.CommandColor(fmt.Sprintf("%s logs %s --recent", cf.Name(), app.Name))})))
return
}
cmd.ui.Wait(cmd.PingerThrottle)
}
}
type instanceCount struct {
running int
starting int
flapping int
down int
total int
}
func (cmd Start) fetchInstanceCount(appGuid string) (instanceCount, error) {
count := instanceCount{}
instances, apiErr := cmd.appInstancesRepo.GetInstances(appGuid)
if apiErr != nil {
return instanceCount{}, apiErr
}
count.total = len(instances)
for _, inst := range instances {
switch inst.State {
case models.InstanceRunning:
count.running++
case models.InstanceStarting:
count.starting++
case models.InstanceFlapping:
count.flapping++
case models.InstanceDown:
count.down++
}
}
return count, nil
}
func instancesDetails(count instanceCount) string {
details := []string{fmt.Sprintf(T("{{.RunningCount}} of {{.TotalCount}} instances running",
map[string]interface{}{"RunningCount": count.running, "TotalCount": count.total}))}
if count.starting > 0 {
details = append(details, fmt.Sprintf(T("{{.StartingCount}} starting",
map[string]interface{}{"StartingCount": count.starting})))
}
if count.down > 0 {
details = append(details, fmt.Sprintf(T("{{.DownCount}} down",
map[string]interface{}{"DownCount": count.down})))
}
if count.flapping > 0 {
details = append(details, fmt.Sprintf(T("{{.FlappingCount}} failing",
map[string]interface{}{"FlappingCount": count.flapping})))
}
return strings.Join(details, ", ")
}