/
cache.go
205 lines (169 loc) · 4.12 KB
/
cache.go
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package internal
import (
"encoding/gob"
"encoding/json"
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"time"
"github.com/dominikbraun/graph"
"github.com/patrickmn/go-cache"
)
var Cache = cache.New(120*time.Minute, 0)
var sharedLogger = TxtLogger()
func SaveCacheToFiles(directory string, accountID string) error {
err := os.MkdirAll(directory, 0755)
if err != nil {
return err
}
for key, item := range Cache.Items() {
if accountID != "" && strings.Contains(key, accountID) {
entry := cacheEntry{
Value: item.Object,
Exp: item.Expiration,
}
jsonData, err := json.MarshalIndent(entry, "", " ")
if err != nil {
return err
}
filename := filepath.Join(directory, key+".json")
err = os.WriteFile(filename, jsonData, 0644)
if err != nil {
return err
}
}
}
return nil
}
func LoadCacheFromFiles(directory string) error {
_, err := os.Stat(directory)
if os.IsNotExist(err) {
// Directory doesn't exist, skip loading cache
return nil
} else if err != nil {
return err
}
files, err := os.ReadDir(directory)
if err != nil {
return err
}
for _, file := range files {
if file.IsDir() {
continue
}
filename := filepath.Join(directory, file.Name())
jsonData, err := os.ReadFile(filename)
if err != nil {
return err
}
var entry cacheEntry
err = json.Unmarshal(jsonData, &entry)
if err != nil {
return err
}
key := strings.TrimSuffix(file.Name(), ".json")
Cache.Set(key, entry.Value, time.Duration(entry.Exp-time.Now().UnixNano()))
}
fmt.Println("Cache loaded from files.")
return nil
}
type cacheEntry struct {
Value interface{}
Exp int64
}
type CacheableAWSConfig struct {
Region string
//Credentials aws.CredentialsProvider
//ConfigSources []interface{}
}
func SaveCacheToGobFiles(directory string, accountID string) error {
err := os.MkdirAll(directory, 0755)
if err != nil {
return err
}
for key, item := range Cache.Items() {
// only if the key contains the accountID
if accountID != "" && strings.Contains(key, accountID) {
entry := cacheEntry{
Value: item.Object,
Exp: item.Expiration,
}
filename := filepath.Join(directory, key+".gob")
file, err := os.Create(filename)
if err != nil {
return err
}
defer file.Close()
encoder := gob.NewEncoder(file)
err = encoder.Encode(entry)
if err != nil {
sharedLogger.Errorf("Could not encode the following key: %s", key)
return err
}
// }
}
}
return nil
}
var ErrDirectoryDoesNotExist = errors.New("directory does not exist")
func LoadCacheFromGobFiles(directory string) error {
_, err := os.Stat(directory)
if os.IsNotExist(err) {
// Directory doesn't exist, skip loading cache
return ErrDirectoryDoesNotExist
} else if err != nil {
return err
}
files, err := os.ReadDir(directory)
if err != nil {
return err
}
for _, file := range files {
if file.IsDir() {
continue
}
// if the filetype is json, skip it
if filepath.Ext(file.Name()) == ".json" {
continue
}
filename := filepath.Join(directory, file.Name())
file, err := os.Open(filename)
if err != nil {
return err
}
defer file.Close()
var entry cacheEntry
decoder := gob.NewDecoder(file)
err = decoder.Decode(&entry)
if err != nil {
sharedLogger.Errorf("Could not decode the following file: %s", filename)
continue
}
// the key should remove the directory and the .json suffix from the filename and also trim the first slash
key := strings.TrimSuffix(strings.TrimPrefix(filename, directory), ".gob")[1:]
Cache.Set(key, entry.Value, time.Duration(entry.Exp-time.Now().UnixNano()))
}
//fmt.Println("Cache loaded from files.")
return nil
}
func SaveGraphToGob[K comparable, T any](directory string, name string, g *graph.Graph[K, T]) error {
err := os.MkdirAll(directory, 0755)
if err != nil {
return err
}
filename := filepath.Join(directory, name+".gob")
file, err := os.Create(filename)
if err != nil {
return err
}
defer file.Close()
encoder := gob.NewEncoder(file)
err = encoder.Encode(g)
if err != nil {
sharedLogger.Errorf("Could not encode the following graph: %s", name)
return err
}
return nil
}