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policy_cleaner.go
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/
policy_cleaner.go
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package cleaner
import (
"context"
"fmt"
"policy-server/models"
"time"
"code.cloudfoundry.org/lager"
)
//go:generate counterfeiter -o fakes/uua_client.go --fake-name UAAClient . uaaClient
type uaaClient interface {
GetToken() (string, error)
}
//go:generate counterfeiter -o fakes/cc_client.go --fake-name CCClient . ccClient
type ccClient interface {
GetLiveAppGUIDs(token string, appGUIDs []string) (map[string]struct{}, error)
}
//go:generate counterfeiter -o fakes/store.go --fake-name Store . store
type store interface {
All() ([]models.Policy, error)
Delete([]models.Policy) error
}
//go:generate counterfeiter -o fakes/contextAdapter.go --fake-name ContextAdapter . contextAdapter
type contextAdapter interface {
WithTimeout(context.Context, time.Duration) (context.Context, context.CancelFunc)
}
type PolicyCleaner struct {
Logger lager.Logger
Store store
UAAClient uaaClient
CCClient ccClient
CCAppRequestChunkSize int
RequestTimeout time.Duration
}
func (p *PolicyCleaner) DeleteStalePolicies() ([]models.Policy, error) {
policies, err := p.Store.All()
if err != nil {
p.Logger.Error("store-list-policies-failed", err)
return nil, fmt.Errorf("database read failed: %s", err)
}
token, err := p.UAAClient.GetToken()
if err != nil {
p.Logger.Error("get-uaa-token-failed", err)
return nil, fmt.Errorf("get UAA token failed: %s", err)
}
stalePolicies := []models.Policy{}
appGUIDs := policyAppGUIDs(policies)
appGUIDchunks := getChunks(appGUIDs, p.CCAppRequestChunkSize)
for _, appGUIDchunk := range appGUIDchunks {
liveAppGUIDs, err := p.CCClient.GetLiveAppGUIDs(token, appGUIDchunk)
if err != nil {
p.Logger.Error("cc-get-app-guids-failed", err)
return nil, fmt.Errorf("get app guids from Cloud-Controller failed: %s", err)
}
staleAppGUIDs := getStaleAppGUIDs(liveAppGUIDs, appGUIDchunk)
toDelete := getStalePolicies(policies, staleAppGUIDs)
stalePolicies = append(stalePolicies, toDelete...)
p.Logger.Info("deleting stale policies:", lager.Data{
"total_policies": len(stalePolicies),
"stale_policies": stalePolicies,
})
err = p.Store.Delete(toDelete)
if err != nil {
p.Logger.Error("store-delete-policies-failed", err)
return nil, fmt.Errorf("database write failed: %s", err)
}
}
return stalePolicies, nil
}
func (p *PolicyCleaner) DeleteStalePoliciesWrapper() error {
_, err := p.DeleteStalePolicies()
return err
}
func getStaleAppGUIDs(liveAppGUIDs map[string]struct{}, appGUIDs []string) map[string]struct{} {
staleAppGUIDs := make(map[string]struct{})
for _, guid := range appGUIDs {
if _, ok := liveAppGUIDs[guid]; !ok {
staleAppGUIDs[guid] = struct{}{}
}
}
return staleAppGUIDs
}
func getStalePolicies(policyList []models.Policy, staleAppGUIDs map[string]struct{}) []models.Policy {
stalePolicies := []models.Policy{}
for _, p := range policyList {
_, foundSrc := staleAppGUIDs[p.Source.ID]
_, foundDst := staleAppGUIDs[p.Destination.ID]
if foundSrc || foundDst {
stalePolicies = append(stalePolicies, p)
}
}
return stalePolicies
}
func policyAppGUIDs(policyList []models.Policy) []string {
appGUIDset := make(map[string]struct{})
for _, p := range policyList {
appGUIDset[p.Source.ID] = struct{}{}
appGUIDset[p.Destination.ID] = struct{}{}
}
var appGUIDs []string
for guid, _ := range appGUIDset {
appGUIDs = append(appGUIDs, guid)
}
return appGUIDs
}
func getChunks(appGuids []string, chunkSize int) [][]string {
if chunkSize < 1 {
chunkSize = 100
}
var chunks [][]string
for i := 0; i < len(appGuids); i += chunkSize {
last := i + chunkSize
if last > len(appGuids) {
last = len(appGuids)
}
chunks = append(chunks, appGuids[i:last])
}
return chunks
}