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resource_type_scanner.go
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/
resource_type_scanner.go
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package radar
import (
"context"
"reflect"
"time"
"code.cloudfoundry.org/clock"
"code.cloudfoundry.org/lager"
"github.com/concourse/atc"
"github.com/concourse/atc/creds"
"github.com/concourse/atc/db"
"github.com/concourse/atc/resource"
"github.com/concourse/atc/worker"
)
type resourceTypeScanner struct {
clock clock.Clock
resourceFactory resource.ResourceFactory
resourceConfigCheckSessionFactory db.ResourceConfigCheckSessionFactory
defaultInterval time.Duration
dbPipeline db.Pipeline
externalURL string
variables creds.Variables
}
func NewResourceTypeScanner(
clock clock.Clock,
resourceFactory resource.ResourceFactory,
resourceConfigCheckSessionFactory db.ResourceConfigCheckSessionFactory,
defaultInterval time.Duration,
dbPipeline db.Pipeline,
externalURL string,
variables creds.Variables,
) Scanner {
return &resourceTypeScanner{
clock: clock,
resourceFactory: resourceFactory,
resourceConfigCheckSessionFactory: resourceConfigCheckSessionFactory,
defaultInterval: defaultInterval,
dbPipeline: dbPipeline,
externalURL: externalURL,
variables: variables,
}
}
func (scanner *resourceTypeScanner) Run(logger lager.Logger, resourceTypeName string) (time.Duration, error) {
return scanner.scan(logger.Session("tick"), resourceTypeName, nil, false)
}
func (scanner *resourceTypeScanner) ScanFromVersion(logger lager.Logger, resourceTypeName string, fromVersion atc.Version) error {
return nil
}
func (scanner *resourceTypeScanner) Scan(logger lager.Logger, resourceTypeName string) error {
_, err := scanner.scan(logger, resourceTypeName, nil, true)
return err
}
func (scanner *resourceTypeScanner) scan(logger lager.Logger, resourceTypeName string, fromVersion atc.Version, mustComplete bool) (time.Duration, error) {
lockLogger := logger.Session("lock", lager.Data{
"resource-type": resourceTypeName,
})
savedResourceType, found, err := scanner.dbPipeline.ResourceType(resourceTypeName)
if err != nil {
logger.Error("failed-to-find-resource-type-in-db", err)
return 0, err
}
if !found {
return 0, db.ResourceTypeNotFoundError{Name: resourceTypeName}
}
interval, err := scanner.checkInterval(savedResourceType.CheckEvery())
if err != nil {
return 0, err
}
resourceTypes, err := scanner.dbPipeline.ResourceTypes()
if err != nil {
logger.Error("failed-to-get-resource-types", err)
return 0, err
}
for _, parentType := range resourceTypes {
if parentType.Name() == savedResourceType.Name() {
continue
}
if parentType.Name() != savedResourceType.Type() {
continue
}
if parentType.Version() != nil {
continue
}
if err = scanner.Scan(logger, parentType.Name()); err != nil {
logger.Error("failed-to-scan-parent-resource-type-version", err)
return 0, err
}
}
resourceTypes, err = scanner.dbPipeline.ResourceTypes()
if err != nil {
logger.Error("failed-to-get-resource-types", err)
return 0, err
}
versionedResourceTypes := creds.NewVersionedResourceTypes(
scanner.variables,
resourceTypes.Deserialize(),
)
source, err := creds.NewSource(scanner.variables, savedResourceType.Source()).Evaluate()
if err != nil {
logger.Error("failed-to-evaluate-resource-type-source", err)
return 0, err
}
resourceConfigCheckSession, err := scanner.resourceConfigCheckSessionFactory.FindOrCreateResourceConfigCheckSession(
logger,
savedResourceType.Type(),
source,
versionedResourceTypes.Without(savedResourceType.Name()),
ContainerExpiries,
)
if err != nil {
logger.Error("failed-to-find-or-create-resource-config", err)
return 0, err
}
err = savedResourceType.SetResourceConfig(resourceConfigCheckSession.ResourceConfig().ID())
if err != nil {
logger.Error("failed-to-set-resource-config-id-on-resource-type", err)
return 0, err
}
for breaker := true; breaker == true; breaker = mustComplete {
lock, acquired, err := scanner.dbPipeline.AcquireResourceTypeCheckingLockWithIntervalCheck(
logger,
savedResourceType.Name(),
resourceConfigCheckSession.ResourceConfig(),
interval,
mustComplete,
)
if err != nil {
lockLogger.Error("failed-to-get-lock", err, lager.Data{
"resource-type": resourceTypeName,
})
return interval, ErrFailedToAcquireLock
}
if !acquired {
lockLogger.Debug("did-not-get-lock")
if mustComplete {
scanner.clock.Sleep(time.Second)
continue
} else {
return interval, ErrFailedToAcquireLock
}
}
defer lock.Release()
break
}
if fromVersion == nil {
fromVersion = atc.Version(savedResourceType.Version())
}
return interval, scanner.check(
logger,
savedResourceType,
resourceConfigCheckSession,
fromVersion,
versionedResourceTypes,
source,
)
}
func (scanner *resourceTypeScanner) check(
logger lager.Logger,
savedResourceType db.ResourceType,
resourceConfigCheckSession db.ResourceConfigCheckSession,
fromVersion atc.Version,
versionedResourceTypes creds.VersionedResourceTypes,
source atc.Source,
) error {
pipelinePaused, err := scanner.dbPipeline.CheckPaused()
if err != nil {
logger.Error("failed-to-check-if-pipeline-paused", err)
return err
}
if pipelinePaused {
logger.Debug("pipeline-paused")
return nil
}
resourceSpec := worker.ContainerSpec{
ImageSpec: worker.ImageSpec{
ResourceType: savedResourceType.Type(),
},
Tags: savedResourceType.Tags(),
TeamID: scanner.dbPipeline.TeamID(),
}
res, err := scanner.resourceFactory.NewResource(
context.Background(),
logger,
db.NewResourceConfigCheckSessionContainerOwner(resourceConfigCheckSession, scanner.dbPipeline.TeamID()),
db.ContainerMetadata{
Type: db.ContainerTypeCheck,
},
resourceSpec,
versionedResourceTypes.Without(savedResourceType.Name()),
worker.NoopImageFetchingDelegate{},
)
if err != nil {
logger.Error("failed-to-initialize-new-container", err)
return err
}
newVersions, err := res.Check(context.TODO(), source, fromVersion)
if err != nil {
if rErr, ok := err.(resource.ErrResourceScriptFailed); ok {
logger.Info("check-failed", lager.Data{"exit-status": rErr.ExitStatus})
return rErr
}
logger.Error("failed-to-check", err)
return err
}
if len(newVersions) == 0 || reflect.DeepEqual(newVersions, []atc.Version{fromVersion}) {
logger.Debug("no-new-versions")
return nil
}
logger.Info("versions-found", lager.Data{
"versions": newVersions,
"total": len(newVersions),
})
version := newVersions[len(newVersions)-1]
err = savedResourceType.SaveVersion(version)
if err != nil {
logger.Error("failed-to-save-resource-type-version", err, lager.Data{
"version": version,
})
return err
}
return nil
}
func (scanner *resourceTypeScanner) checkInterval(checkEvery string) (time.Duration, error) {
interval := scanner.defaultInterval
if checkEvery != "" {
configuredInterval, err := time.ParseDuration(checkEvery)
if err != nil {
return 0, err
}
interval = configuredInterval
}
return interval, nil
}