From c3f7342a157be917e40ed0516c9b5551e3df50ed Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=D0=9A=D0=BE=D0=B1=D0=B5=D0=BB=D0=B5=D0=B2=20=D0=90=D0=BD?= =?UTF-8?q?=D0=B4=D1=80=D0=B5=D0=B9=20=D0=90=D0=BD=D0=B4=D1=80=D0=B5=D0=B5?= =?UTF-8?q?=D0=B2=D0=B8=D1=87?= Date: Fri, 3 Jun 2022 11:15:04 +0300 Subject: [PATCH] Initial Commit --- .gitconfig | 2 + delete.go | 9 +++ exists.go | 13 +++++ get.go | 25 ++++++++ go.mod | 32 ++++++++++ go.sum | 168 +++++++++++++++++++++++++++++++++++++++++++++++++++++ range.go | 27 +++++++++ repo.go | 85 +++++++++++++++++++++++++++ store.go | 22 +++++++ 9 files changed, 383 insertions(+) create mode 100644 .gitconfig create mode 100644 delete.go create mode 100644 exists.go create mode 100644 get.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 range.go create mode 100644 repo.go create mode 100644 store.go diff --git a/.gitconfig b/.gitconfig new file mode 100644 index 0000000..d7403e1 --- /dev/null +++ b/.gitconfig @@ -0,0 +1,2 @@ +[url "ssh://git.belvedersky.ru/"] + insteadOf = https://git.belvedersky.ru/ \ No newline at end of file diff --git a/delete.go b/delete.go new file mode 100644 index 0000000..9795212 --- /dev/null +++ b/delete.go @@ -0,0 +1,9 @@ +package cache + +import "github.com/dgraph-io/badger/v3" + +func (c *CacheRepository) Delete(key string) error { + return c.cache.Update(func(txn *badger.Txn) error { + return txn.Delete([]byte(key)) + }) +} diff --git a/exists.go b/exists.go new file mode 100644 index 0000000..acaa6eb --- /dev/null +++ b/exists.go @@ -0,0 +1,13 @@ +package cache + +import "github.com/dgraph-io/badger/v3" + +func (c *CacheRepository) Exist(key string) (bool, error) { + _, err := c.Get(key) + if err != nil { + if err != badger.ErrKeyNotFound { + return false, nil + } + } + return true, err +} diff --git a/get.go b/get.go new file mode 100644 index 0000000..a1232cf --- /dev/null +++ b/get.go @@ -0,0 +1,25 @@ +package cache + +import ( + "bytes" + + "github.com/dgraph-io/badger/v3" +) + +func (c *CacheRepository) Get(key string) (b *bytes.Buffer, err error) { + if err := c.cache.View(func(txn *badger.Txn) error { + item, err := txn.Get([]byte(key)) + if err != nil { + return err + } + keyBytes, err := item.ValueCopy(nil) + if err != nil { + return err + } + b = bytes.NewBuffer(keyBytes) + return nil + }); err != nil { + return nil, err + } + return +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..b322f29 --- /dev/null +++ b/go.mod @@ -0,0 +1,32 @@ +module git.belvedersky.ru/common/cache + +go 1.18 + +require github.com/dgraph-io/badger/v3 v3.2103.2 + +require ( + git.belvedersky.ru/common/logger v0.1.0 // indirect + github.com/andybalholm/brotli v1.0.4 // indirect + github.com/cespare/xxhash v1.1.0 // indirect + github.com/cespare/xxhash/v2 v2.1.1 // indirect + github.com/dgraph-io/ristretto v0.1.0 // indirect + github.com/dustin/go-humanize v1.0.0 // indirect + github.com/fatih/color v1.13.0 // indirect + github.com/gofiber/fiber/v2 v2.34.0 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect + github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect + github.com/golang/protobuf v1.3.1 // indirect + github.com/golang/snappy v0.0.3 // indirect + github.com/google/flatbuffers v1.12.1 // indirect + github.com/klauspost/compress v1.15.0 // indirect + github.com/mattn/go-colorable v0.1.9 // indirect + github.com/mattn/go-isatty v0.0.14 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/valyala/bytebufferpool v1.0.0 // indirect + github.com/valyala/fasthttp v1.37.0 // indirect + github.com/valyala/tcplisten v1.0.0 // indirect + go.opencensus.io v0.22.5 // indirect + golang.org/x/net v0.0.0-20220225172249-27dd8689420f // indirect + golang.org/x/sys v0.0.0-20220227234510-4e6760a101f9 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..c1052f8 --- /dev/null +++ b/go.sum @@ -0,0 +1,168 @@ 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string) (b []*bytes.Buffer, err error) { + c.cache.View(func(txn *badger.Txn) error { + it := txn.NewIterator(badger.DefaultIteratorOptions) + defer it.Close() + prefix := []byte(prefix) + for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() { + item := it.Item() + err := item.Value(func(v []byte) error { + b = append(b, bytes.NewBuffer(v)) + return nil + }) + if err != nil { + return err + } + } + return nil + }) + return +} diff --git a/repo.go b/repo.go new file mode 100644 index 0000000..afbb393 --- /dev/null +++ b/repo.go @@ -0,0 +1,85 @@ +package cache + +import ( + "context" + "encoding/gob" + "os" + "path/filepath" + "time" + + "git.belvedersky.ru/common/logger" + "git.belvedersky.ru/common/logger/service" + + badger "github.com/dgraph-io/badger/v3" +) + +type CacheConfig struct { + Dir string +} + +type CacheRepository struct { + cache *badger.DB + logger *service.LoggerService + config *CacheConfig + Err service.TypeError +} + +// Новый сервис кеша +func New(config *CacheConfig, l *logger.Logger) (repo *CacheRepository, err error) { + path := filepath.Join(".", config.Dir) + if _, err = os.Stat(path); os.IsNotExist(err) { + err := os.Mkdir(path, 0777) + if err != nil { + return nil, err + } + } + cacheConfig := badger.DefaultOptions(config.Dir) + log := l.Create("cache") + cacheConfig.Logger = log + + cache, err := badger.Open(cacheConfig.WithLoggingLevel(badger.ERROR)) + if err != nil { + return nil, err + } + r := CacheRepository{ + config: config, + cache: cache, + Err: service.TypeError{Code: 3, Description: "Ошибка badger"}, + logger: (*service.LoggerService)(log), + } + return &r, nil +} + +// Регистрация структур в кеше +func (c *CacheRepository) RegisterStruct(value interface{}) { + gob.Register(value) +} + +func (k *CacheRepository) RunGC(ctx context.Context, interval time.Duration, discardRatio float64) { + go func() { + ticker := time.NewTicker(interval) + defer ticker.Stop() + + for { + select { + case <-ticker.C: + start := time.Now() + + for { + err := k.cache.RunValueLogGC(discardRatio) + if err != nil { + if err == badger.ErrNoRewrite { + break + } + k.logger.Error(service.LogErrorStruct{Message: "garbage collection failed: " + err.Error()}) + break + } + } + + k.logger.Log.Printf("garbage collection finished %v\n", time.Since(start)) + case <-ctx.Done(): + return + } + } + }() +} diff --git a/store.go b/store.go new file mode 100644 index 0000000..e204535 --- /dev/null +++ b/store.go @@ -0,0 +1,22 @@ +package cache + +import ( + "bytes" + "encoding/gob" + "time" + + "github.com/dgraph-io/badger/v3" +) + +func (c *CacheRepository) Store(id string, data interface{}, ttl *time.Duration) error { + var buff bytes.Buffer + enc := gob.NewEncoder(&buff) + enc.Encode(data) + return c.cache.Update(func(txn *badger.Txn) error { + e := badger.NewEntry([]byte(id), buff.Bytes()) + if ttl != nil { + e = e.WithTTL(*ttl) + } + return txn.SetEntry(e) + }) +}