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application.go
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application.go
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package v2action
import (
"fmt"
"time"
"code.cloudfoundry.org/cli/actor/actionerror"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccerror"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccv2"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccv2/constant"
)
type ApplicationStateChange string
const (
ApplicationStateStopping ApplicationStateChange = "stopping"
ApplicationStateStaging ApplicationStateChange = "staging"
ApplicationStateStarting ApplicationStateChange = "starting"
)
// Application represents an application.
type Application ccv2.Application
// CalculatedBuildpack returns the buildpack that will be used.
func (application Application) CalculatedBuildpack() string {
if application.Buildpack.IsSet {
return application.Buildpack.Value
}
return application.DetectedBuildpack.Value
}
// CalculatedCommand returns the command that will be used.
func (application Application) CalculatedCommand() string {
if application.Command.IsSet {
return application.Command.Value
}
return application.DetectedStartCommand.Value
}
// CalculatedHealthCheckEndpoint returns the health check endpoint.
// If the health check type is not http it will return the empty string.
func (application Application) CalculatedHealthCheckEndpoint() string {
if application.HealthCheckType == "http" {
return application.HealthCheckHTTPEndpoint
}
return ""
}
// StagingCompleted returns true if the application has been staged.
func (application Application) StagingCompleted() bool {
return application.PackageState == constant.ApplicationPackageStaged
}
// StagingFailed returns true if staging the application failed.
func (application Application) StagingFailed() bool {
return application.PackageState == constant.ApplicationPackageFailed
}
// StagingFailedMessage returns the verbose description of the failure or
// the reason if the verbose description is empty.
func (application Application) StagingFailedMessage() string {
if application.StagingFailedDescription != "" {
return application.StagingFailedDescription
}
return application.StagingFailedReason
}
// StagingFailedNoAppDetected returns true when the staging failed due to a
// NoAppDetectedError.
func (application Application) StagingFailedNoAppDetected() bool {
return application.StagingFailedReason == "NoAppDetectedError"
}
// Started returns true when the application is started.
func (application Application) Started() bool {
return application.State == constant.ApplicationStarted
}
// Stopped returns true when the application is stopped.
func (application Application) Stopped() bool {
return application.State == constant.ApplicationStopped
}
func (application Application) String() string {
return fmt.Sprintf(
"App Name: '%s', Buildpack (%t, '%s'), Command: (%t, '%s'), Detected Buildpack: (%t, '%s'), Detected Start Command: (%t, '%s'), Disk Quota: '%d', Docker Image: '%s', Health Check HTTP Endpoint: '%s', Health Check Timeout: '%d', Health Check Type: '%s', Instances: (%t, '%d'), Memory: '%d', Space GUID: '%s', Stack GUID: '%s', State: '%s'",
application.Name,
application.Buildpack.IsSet,
application.Buildpack.Value,
application.Command.IsSet,
application.Command.Value,
application.DetectedBuildpack.IsSet,
application.DetectedBuildpack.Value,
application.DetectedStartCommand.IsSet,
application.DetectedStartCommand.Value,
application.DiskQuota.Value,
application.DockerImage,
application.HealthCheckHTTPEndpoint,
application.HealthCheckTimeout,
application.HealthCheckType,
application.Instances.IsSet,
application.Instances.Value,
application.Memory.Value,
application.SpaceGUID,
application.StackGUID,
application.State,
)
}
// CreateApplication creates an application.
func (actor Actor) CreateApplication(application Application) (Application, Warnings, error) {
app, warnings, err := actor.CloudControllerClient.CreateApplication(ccv2.Application(application))
return Application(app), Warnings(warnings), err
}
// GetApplication returns the application.
func (actor Actor) GetApplication(guid string) (Application, Warnings, error) {
app, warnings, err := actor.CloudControllerClient.GetApplication(guid)
if _, ok := err.(ccerror.ResourceNotFoundError); ok {
return Application{}, Warnings(warnings), actionerror.ApplicationNotFoundError{GUID: guid}
}
return Application(app), Warnings(warnings), err
}
// GetApplicationByNameAndSpace returns an application with matching name in
// the space.
func (actor Actor) GetApplicationByNameAndSpace(name string, spaceGUID string) (Application, Warnings, error) {
app, warnings, err := actor.CloudControllerClient.GetApplications(
ccv2.Filter{
Type: constant.NameFilter,
Operator: constant.EqualOperator,
Values: []string{name},
},
ccv2.Filter{
Type: constant.SpaceGUIDFilter,
Operator: constant.EqualOperator,
Values: []string{spaceGUID},
},
)
if err != nil {
return Application{}, Warnings(warnings), err
}
if len(app) == 0 {
return Application{}, Warnings(warnings), actionerror.ApplicationNotFoundError{
Name: name,
}
}
return Application(app[0]), Warnings(warnings), nil
}
// GetApplicationsBySpace returns all applications in a space.
func (actor Actor) GetApplicationsBySpace(spaceGUID string) ([]Application, Warnings, error) {
ccv2Apps, warnings, err := actor.CloudControllerClient.GetApplications(
ccv2.Filter{
Type: constant.SpaceGUIDFilter,
Operator: constant.EqualOperator,
Values: []string{spaceGUID},
},
)
if err != nil {
return []Application{}, Warnings(warnings), err
}
apps := make([]Application, len(ccv2Apps))
for i, ccv2App := range ccv2Apps {
apps[i] = Application(ccv2App)
}
return apps, Warnings(warnings), nil
}
// GetRouteApplications returns a list of apps associated with the provided
// Route GUID.
func (actor Actor) GetRouteApplications(routeGUID string) ([]Application, Warnings, error) {
apps, warnings, err := actor.CloudControllerClient.GetRouteApplications(routeGUID)
if err != nil {
return nil, Warnings(warnings), err
}
allApplications := []Application{}
for _, app := range apps {
allApplications = append(allApplications, Application(app))
}
return allApplications, Warnings(warnings), nil
}
// SetApplicationHealthCheckTypeByNameAndSpace updates an application's health
// check type if it is not already the desired type.
func (actor Actor) SetApplicationHealthCheckTypeByNameAndSpace(name string, spaceGUID string, healthCheckType constant.ApplicationHealthCheckType, httpEndpoint string) (Application, Warnings, error) {
if httpEndpoint != "/" && healthCheckType != constant.ApplicationHealthCheckHTTP {
return Application{}, nil, actionerror.HTTPHealthCheckInvalidError{}
}
var allWarnings Warnings
app, warnings, err := actor.GetApplicationByNameAndSpace(name, spaceGUID)
allWarnings = append(allWarnings, warnings...)
if err != nil {
return Application{}, allWarnings, err
}
if app.HealthCheckType != healthCheckType ||
healthCheckType == constant.ApplicationHealthCheckHTTP && app.HealthCheckHTTPEndpoint != httpEndpoint {
var healthCheckEndpoint string
if healthCheckType == constant.ApplicationHealthCheckHTTP {
healthCheckEndpoint = httpEndpoint
}
updatedApp, apiWarnings, err := actor.CloudControllerClient.UpdateApplication(ccv2.Application{
GUID: app.GUID,
HealthCheckType: healthCheckType,
HealthCheckHTTPEndpoint: healthCheckEndpoint,
})
allWarnings = append(allWarnings, Warnings(apiWarnings)...)
return Application(updatedApp), allWarnings, err
}
return app, allWarnings, nil
}
// StartApplication restarts a given application. If already stopped, no stop
// call will be sent.
func (actor Actor) StartApplication(app Application) (<-chan ApplicationStateChange, <-chan string, <-chan error) {
appState := make(chan ApplicationStateChange)
allWarnings := make(chan string)
errs := make(chan error)
go func() {
defer close(appState)
defer close(allWarnings)
defer close(errs)
if app.PackageState != constant.ApplicationPackageStaged {
appState <- ApplicationStateStaging
}
updatedApp, warnings, err := actor.CloudControllerClient.UpdateApplication(ccv2.Application{
GUID: app.GUID,
State: constant.ApplicationStarted,
})
for _, warning := range warnings {
allWarnings <- warning
}
if err != nil {
errs <- err
return
}
actor.waitForApplicationStageAndStart(Application(updatedApp), appState, allWarnings, errs)
}()
return appState, allWarnings, errs
}
// RestartApplication restarts a given application. If already stopped, no stop
// call will be sent.
func (actor Actor) RestartApplication(app Application) (<-chan ApplicationStateChange, <-chan string, <-chan error) {
appState := make(chan ApplicationStateChange)
allWarnings := make(chan string)
errs := make(chan error)
go func() {
defer close(appState)
defer close(allWarnings)
defer close(errs)
if app.Started() {
appState <- ApplicationStateStopping
updatedApp, warnings, err := actor.CloudControllerClient.UpdateApplication(ccv2.Application{
GUID: app.GUID,
State: constant.ApplicationStopped,
})
for _, warning := range warnings {
allWarnings <- warning
}
if err != nil {
errs <- err
return
}
app = Application(updatedApp)
}
if app.PackageState != constant.ApplicationPackageStaged {
appState <- ApplicationStateStaging
}
updatedApp, warnings, err := actor.CloudControllerClient.UpdateApplication(ccv2.Application{
GUID: app.GUID,
State: constant.ApplicationStarted,
})
for _, warning := range warnings {
allWarnings <- warning
}
if err != nil {
errs <- err
return
}
actor.waitForApplicationStageAndStart(Application(updatedApp), appState, allWarnings, errs)
}()
return appState, allWarnings, errs
}
// RestageApplication restarts a given application. If already stopped, no stop
// call will be sent.
func (actor Actor) RestageApplication(app Application) (<-chan ApplicationStateChange, <-chan string, <-chan error) {
appState := make(chan ApplicationStateChange)
allWarnings := make(chan string)
errs := make(chan error)
go func() {
defer close(appState)
defer close(allWarnings)
defer close(errs)
appState <- ApplicationStateStaging
restagedApp, warnings, err := actor.CloudControllerClient.RestageApplication(ccv2.Application{
GUID: app.GUID,
})
for _, warning := range warnings {
allWarnings <- warning
}
if err != nil {
errs <- err
return
}
actor.waitForApplicationStageAndStart(Application(restagedApp), appState, allWarnings, errs)
}()
return appState, allWarnings, errs
}
// UpdateApplication updates an application.
func (actor Actor) UpdateApplication(application Application) (Application, Warnings, error) {
app, warnings, err := actor.CloudControllerClient.UpdateApplication(ccv2.Application(application))
return Application(app), Warnings(warnings), err
}
func (actor Actor) pollStaging(app Application, allWarnings chan<- string) error {
timeout := time.Now().Add(actor.Config.StagingTimeout())
for time.Now().Before(timeout) {
currentApplication, warnings, err := actor.GetApplication(app.GUID)
for _, warning := range warnings {
allWarnings <- warning
}
switch {
case err != nil:
return err
case currentApplication.StagingCompleted():
return nil
case currentApplication.StagingFailed():
if currentApplication.StagingFailedNoAppDetected() {
return actionerror.StagingFailedNoAppDetectedError{Reason: currentApplication.StagingFailedMessage()}
}
return actionerror.StagingFailedError{Reason: currentApplication.StagingFailedMessage()}
}
time.Sleep(actor.Config.PollingInterval())
}
return actionerror.StagingTimeoutError{AppName: app.Name, Timeout: actor.Config.StagingTimeout()}
}
func (actor Actor) pollStartup(app Application, allWarnings chan<- string) error {
timeout := time.Now().Add(actor.Config.StartupTimeout())
for time.Now().Before(timeout) {
currentInstances, warnings, err := actor.GetApplicationInstancesByApplication(app.GUID)
for _, warning := range warnings {
allWarnings <- warning
}
if err != nil {
return err
}
for _, instance := range currentInstances {
switch {
case instance.Running():
return nil
case instance.Crashed():
return actionerror.ApplicationInstanceCrashedError{Name: app.Name}
case instance.Flapping():
return actionerror.ApplicationInstanceFlappingError{Name: app.Name}
}
}
time.Sleep(actor.Config.PollingInterval())
}
return actionerror.StartupTimeoutError{Name: app.Name}
}
func (actor Actor) waitForApplicationStageAndStart(app Application, appState chan ApplicationStateChange, allWarnings chan string, errs chan error) {
err := actor.pollStaging(app, allWarnings)
if err != nil {
errs <- err
return
}
if app.Instances.Value == 0 {
return
}
appState <- ApplicationStateStarting
err = actor.pollStartup(app, allWarnings)
if err != nil {
errs <- err
}
}