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resource_instance.go
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resource_instance.go
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package resource
import (
"encoding/json"
"code.cloudfoundry.org/lager"
"github.com/concourse/atc"
"github.com/concourse/atc/dbng"
"github.com/concourse/atc/worker"
"github.com/concourse/baggageclaim"
)
//go:generate counterfeiter . ResourceInstance
type ResourceInstance interface {
ResourceUser() dbng.ResourceUser
FindInitializedOn(lager.Logger, worker.Client) (worker.Volume, bool, error)
CreateOn(lager.Logger, worker.Client) (worker.Volume, error)
ResourceCacheIdentifier() worker.ResourceCacheIdentifier
}
type resourceInstance struct {
resourceTypeName ResourceType
version atc.Version
source atc.Source
params atc.Params
resourceUser dbng.ResourceUser
resourceTypes atc.VersionedResourceTypes
dbResourceCacheFactory dbng.ResourceCacheFactory
}
func NewResourceInstance(
resourceTypeName ResourceType,
version atc.Version,
source atc.Source,
params atc.Params,
resourceUser dbng.ResourceUser,
resourceTypes atc.VersionedResourceTypes,
dbResourceCacheFactory dbng.ResourceCacheFactory,
) ResourceInstance {
return &resourceInstance{
resourceTypeName: resourceTypeName,
version: version,
source: source,
params: params,
resourceUser: resourceUser,
resourceTypes: resourceTypes,
dbResourceCacheFactory: dbResourceCacheFactory,
}
}
func (instance resourceInstance) ResourceUser() dbng.ResourceUser {
return instance.resourceUser
}
func (instance resourceInstance) CreateOn(logger lager.Logger, workerClient worker.Client) (worker.Volume, error) {
resourceCache, err := instance.dbResourceCacheFactory.FindOrCreateResourceCache(
logger,
instance.resourceUser,
string(instance.resourceTypeName),
instance.version,
instance.source,
instance.params,
instance.resourceTypes,
)
if err != nil {
return nil, err
}
return workerClient.CreateVolumeForResourceCache(
logger,
worker.VolumeSpec{
Strategy: baggageclaim.EmptyStrategy{},
},
resourceCache,
)
}
func (instance resourceInstance) FindInitializedOn(logger lager.Logger, workerClient worker.Client) (worker.Volume, bool, error) {
resourceCache, err := instance.dbResourceCacheFactory.FindOrCreateResourceCache(
logger,
instance.resourceUser,
string(instance.resourceTypeName),
instance.version,
instance.source,
instance.params,
instance.resourceTypes,
)
if err != nil {
logger.Error("failed-to-find-or-initialized-volume-resource-cache-for-build", err)
return nil, false, err
}
return workerClient.FindInitializedVolumeForResourceCache(
logger,
resourceCache,
)
}
func (instance resourceInstance) ResourceCacheIdentifier() worker.ResourceCacheIdentifier {
return worker.ResourceCacheIdentifier{
ResourceVersion: instance.version,
ResourceHash: GenerateResourceHash(instance.source, string(instance.resourceTypeName)),
}
}
func GenerateResourceHash(source atc.Source, resourceType string) string {
sourceJSON, _ := json.Marshal(source)
return resourceType + string(sourceJSON)
}