Disk backed local store (#1491)
This commit is contained in:
Janos Dobronszki
commit
c65fec6a6c
351
file.go
Normal file
351
file.go
Normal file
@ -0,0 +1,351 @@
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// Package local is a file system backed store
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package file
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import (
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"sort"
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"strings"
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"time"
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"github.com/micro/go-micro/v2/store"
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micro_store "github.com/micro/go-micro/v2/store"
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bolt "go.etcd.io/bbolt"
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"github.com/pkg/errors"
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)
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// NewStore returns a memory store
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func NewStore(opts ...store.Option) store.Store {
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s := &fileStore{
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options: store.Options{},
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}
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for _, o := range opts {
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o(&s.options)
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}
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return s
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}
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type fileStore struct {
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options store.Options
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dir string
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fileName string
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fullFilePath string
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}
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func (m *fileStore) Init(opts ...store.Option) error {
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// m.store.Flush()
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for _, o := range opts {
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o(&m.options)
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}
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if m.options.Database == "" {
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m.options.Database = "default"
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}
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if m.options.Table == "" {
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// bbolt requires bucketname to not be empty
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m.options.Table = "default"
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}
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dir := filepath.Join(os.TempDir(), "micro")
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fname := m.options.Database + ".db"
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_ = os.Mkdir(dir, 0700)
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m.dir = dir
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m.fileName = fname
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m.fullFilePath = filepath.Join(dir, fname)
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return nil
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}
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func (m *fileStore) String() string {
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return "local"
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}
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func (m *fileStore) Read(key string, opts ...store.ReadOption) ([]*store.Record, error) {
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readOpts := store.ReadOptions{}
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for _, o := range opts {
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o(&readOpts)
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}
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var keys []string
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// Handle Prefix / suffix
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if readOpts.Prefix || readOpts.Suffix {
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var opts []store.ListOption
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if readOpts.Prefix {
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opts = append(opts, store.ListPrefix(key))
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}
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if readOpts.Suffix {
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opts = append(opts, store.ListSuffix(key))
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}
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opts = append(opts, store.ListLimit(readOpts.Limit))
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opts = append(opts, store.ListOffset(readOpts.Offset))
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k, err := m.List(opts...)
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if err != nil {
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return nil, errors.Wrap(err, "FileStore: Read couldn't List()")
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}
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keys = k
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} else {
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keys = []string{key}
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}
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var results []*store.Record
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for _, k := range keys {
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r, err := m.get(k)
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if err != nil {
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return results, err
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}
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results = append(results, r)
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}
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return results, nil
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}
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func (m *fileStore) get(k string) (*store.Record, error) {
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if len(m.options.Table) > 0 {
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k = m.options.Table + "/" + k
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}
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if len(m.options.Database) > 0 {
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k = m.options.Database + "/" + k
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}
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store, err := bolt.Open(m.fullFilePath, 0700, &bolt.Options{Timeout: 1 * time.Second})
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if err != nil {
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return nil, err
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}
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defer store.Close()
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err = store.Update(func(tx *bolt.Tx) error {
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_, err := tx.CreateBucketIfNotExists([]byte(m.options.Table))
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if err != nil {
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return err
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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var value []byte
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store.View(func(tx *bolt.Tx) error {
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// @todo this is still very experimental...
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bucket := tx.Bucket([]byte(m.options.Table))
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value = bucket.Get([]byte(k))
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return nil
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})
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if value == nil {
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return nil, micro_store.ErrNotFound
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}
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storedRecord := &internalRecord{}
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err = json.Unmarshal(value, storedRecord)
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if err != nil {
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return nil, err
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}
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newRecord := µ_store.Record{}
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newRecord.Key = storedRecord.Key
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newRecord.Value = storedRecord.Value
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if !storedRecord.ExpiresAt.IsZero() {
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if storedRecord.ExpiresAt.Before(time.Now()) {
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return nil, micro_store.ErrNotFound
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}
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newRecord.Expiry = time.Until(storedRecord.ExpiresAt)
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}
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return newRecord, nil
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}
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func (m *fileStore) Write(r *store.Record, opts ...store.WriteOption) error {
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writeOpts := store.WriteOptions{}
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for _, o := range opts {
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o(&writeOpts)
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}
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if len(opts) > 0 {
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// Copy the record before applying options, or the incoming record will be mutated
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newRecord := store.Record{}
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newRecord.Key = r.Key
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newRecord.Value = r.Value
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newRecord.Expiry = r.Expiry
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if !writeOpts.Expiry.IsZero() {
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newRecord.Expiry = time.Until(writeOpts.Expiry)
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}
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if writeOpts.TTL != 0 {
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newRecord.Expiry = writeOpts.TTL
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}
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return m.set(&newRecord)
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}
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return m.set(r)
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}
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func (m *fileStore) set(r *store.Record) error {
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key := r.Key
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if len(m.options.Table) > 0 {
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key = m.options.Table + "/" + key
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}
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if len(m.options.Database) > 0 {
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key = m.options.Database + "/" + key
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}
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// copy the incoming record and then
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// convert the expiry in to a hard timestamp
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i := &internalRecord{}
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i.Key = r.Key
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i.Value = r.Value
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if r.Expiry != 0 {
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i.ExpiresAt = time.Now().Add(r.Expiry)
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}
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iJSON, _ := json.Marshal(i)
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store, err := bolt.Open(m.fullFilePath, 0700, &bolt.Options{Timeout: 1 * time.Second})
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if err != nil {
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return err
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}
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defer store.Close()
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return store.Update(func(tx *bolt.Tx) error {
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b := tx.Bucket([]byte(m.options.Table))
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if b == nil {
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var err error
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b, err = tx.CreateBucketIfNotExists([]byte(m.options.Table))
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if err != nil {
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return err
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}
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}
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return b.Put([]byte(key), iJSON)
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})
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}
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func (m *fileStore) Delete(key string, opts ...store.DeleteOption) error {
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deleteOptions := store.DeleteOptions{}
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for _, o := range opts {
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o(&deleteOptions)
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}
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return m.delete(key)
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}
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func (m *fileStore) delete(key string) error {
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if len(m.options.Table) > 0 {
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key = m.options.Table + "/" + key
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}
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if len(m.options.Database) > 0 {
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key = m.options.Database + "/" + key
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}
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store, err := bolt.Open(m.fullFilePath, 0700, &bolt.Options{Timeout: 1 * time.Second})
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if err != nil {
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return err
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}
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defer store.Close()
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return store.Update(func(tx *bolt.Tx) error {
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b := tx.Bucket([]byte(m.options.Table))
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if b == nil {
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var err error
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b, err = tx.CreateBucketIfNotExists([]byte(m.options.Table))
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if err != nil {
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return err
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}
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}
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err := b.Delete([]byte(key))
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return err
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})
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}
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func (m *fileStore) deleteAll() error {
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return os.Remove(m.fullFilePath)
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}
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func (m *fileStore) Options() store.Options {
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return m.options
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}
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func (m *fileStore) List(opts ...store.ListOption) ([]string, error) {
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listOptions := store.ListOptions{}
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for _, o := range opts {
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o(&listOptions)
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}
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allKeys := m.list(listOptions.Limit, listOptions.Offset)
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if len(listOptions.Prefix) > 0 {
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var prefixKeys []string
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for _, k := range allKeys {
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if strings.HasPrefix(k, listOptions.Prefix) {
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prefixKeys = append(prefixKeys, k)
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}
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}
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allKeys = prefixKeys
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}
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if len(listOptions.Suffix) > 0 {
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var suffixKeys []string
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for _, k := range allKeys {
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if strings.HasSuffix(k, listOptions.Suffix) {
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suffixKeys = append(suffixKeys, k)
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}
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}
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allKeys = suffixKeys
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}
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return allKeys, nil
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}
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func (m *fileStore) list(limit, offset uint) []string {
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allItems := []string{}
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store, err := bolt.Open(m.fullFilePath, 0700, &bolt.Options{Timeout: 1 * time.Second})
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if err != nil {
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fmt.Println("Error creating file:", err)
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}
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defer store.Close()
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store.Update(func(tx *bolt.Tx) error {
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b := tx.Bucket([]byte(m.options.Table))
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if b == nil {
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var err error
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b, err = tx.CreateBucketIfNotExists([]byte(m.options.Table))
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if err != nil {
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return err
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}
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}
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// @todo very inefficient
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if err := b.ForEach(func(k, v []byte) error {
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storedRecord := &internalRecord{}
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err := json.Unmarshal(v, storedRecord)
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if err != nil {
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return err
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}
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if !storedRecord.ExpiresAt.IsZero() {
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if storedRecord.ExpiresAt.Before(time.Now()) {
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return nil
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}
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}
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allItems = append(allItems, string(k))
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return nil
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}); err != nil {
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return err
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}
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return nil
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})
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allKeys := make([]string, len(allItems))
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i := 0
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for _, k := range allItems {
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if len(m.options.Database) > 0 {
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k = strings.TrimPrefix(k, m.options.Database+"/")
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}
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if len(m.options.Table) > 0 {
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k = strings.TrimPrefix(k, m.options.Table+"/")
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}
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allKeys[i] = k
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i++
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}
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if limit != 0 || offset != 0 {
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sort.Slice(allKeys, func(i, j int) bool { return allKeys[i] < allKeys[j] })
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min := func(i, j uint) uint {
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if i < j {
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return i
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}
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return j
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}
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return allKeys[offset:min(limit, uint(len(allKeys)))]
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}
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return allKeys
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}
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type internalRecord struct {
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Key string
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Value []byte
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ExpiresAt time.Time
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}
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281
file_test.go
Normal file
281
file_test.go
Normal file
@ -0,0 +1,281 @@
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package file
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import (
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"fmt"
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"testing"
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"time"
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"github.com/davecgh/go-spew/spew"
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"github.com/kr/pretty"
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"github.com/micro/go-micro/v2/store"
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)
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func TestFileReInit(t *testing.T) {
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s := NewStore(store.Table("aaa"))
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s.Init(store.Table("bbb"))
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if s.Options().Table != "bbb" {
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t.Error("Init didn't reinitialise the store")
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}
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}
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func TestFileBasic(t *testing.T) {
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s := NewStore()
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s.Init()
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if err := s.(*fileStore).deleteAll(); err != nil {
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t.Logf("Can't delete all: %v", err)
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}
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basictest(s, t)
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}
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func TestFileTable(t *testing.T) {
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s := NewStore()
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s.Init(store.Table("some-Table"))
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if err := s.(*fileStore).deleteAll(); err != nil {
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t.Logf("Can't delete all: %v", err)
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}
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basictest(s, t)
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}
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func TestFileDatabase(t *testing.T) {
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s := NewStore()
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s.Init(store.Database("some-Database"))
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if err := s.(*fileStore).deleteAll(); err != nil {
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t.Logf("Can't delete all: %v", err)
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}
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basictest(s, t)
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}
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func TestFileDatabaseTable(t *testing.T) {
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s := NewStore()
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s.Init(store.Table("some-Table"), store.Database("some-Database"))
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if err := s.(*fileStore).deleteAll(); err != nil {
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t.Logf("Can't delete all: %v", err)
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}
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basictest(s, t)
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}
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func basictest(s store.Store, t *testing.T) {
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t.Logf("Testing store %s, with options %# v\n", s.String(), pretty.Formatter(s.Options()))
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// Read and Write an expiring Record
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if err := s.Write(&store.Record{
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Key: "Hello",
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Value: []byte("World"),
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Expiry: time.Millisecond * 100,
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}); err != nil {
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t.Error(err)
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}
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if r, err := s.Read("Hello"); err != nil {
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t.Error(err)
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} else {
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if len(r) != 1 {
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t.Error("Read returned multiple records")
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}
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if r[0].Key != "Hello" {
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t.Errorf("Expected %s, got %s", "Hello", r[0].Key)
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}
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if string(r[0].Value) != "World" {
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t.Errorf("Expected %s, got %s", "World", r[0].Value)
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}
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}
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time.Sleep(time.Millisecond * 200)
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if _, err := s.Read("Hello"); err != store.ErrNotFound {
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t.Errorf("Expected %# v, got %# v", store.ErrNotFound, err)
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}
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// Write 3 records with various expiry and get with Table
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records := []*store.Record{
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&store.Record{
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Key: "foo",
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Value: []byte("foofoo"),
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},
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&store.Record{
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Key: "foobar",
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Value: []byte("foobarfoobar"),
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Expiry: time.Millisecond * 100,
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},
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&store.Record{
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Key: "foobarbaz",
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Value: []byte("foobarbazfoobarbaz"),
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Expiry: 2 * time.Millisecond * 100,
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},
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}
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for _, r := range records {
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if err := s.Write(r); err != nil {
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t.Errorf("Couldn't write k: %s, v: %# v (%s)", r.Key, pretty.Formatter(r.Value), err)
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}
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}
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if results, err := s.Read("foo", store.ReadPrefix()); err != nil {
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t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
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} else {
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if len(results) != 3 {
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t.Errorf("Expected 3 items, got %d", len(results))
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t.Logf("Table test: %v\n", spew.Sdump(results))
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}
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}
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time.Sleep(time.Millisecond * 100)
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if results, err := s.Read("foo", store.ReadPrefix()); err != nil {
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t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
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} else {
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if len(results) != 2 {
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t.Errorf("Expected 2 items, got %d", len(results))
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t.Logf("Table test: %v\n", spew.Sdump(results))
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}
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}
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time.Sleep(time.Millisecond * 100)
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if results, err := s.Read("foo", store.ReadPrefix()); err != nil {
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t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
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} else {
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if len(results) != 1 {
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t.Errorf("Expected 1 item, got %d", len(results))
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t.Logf("Table test: %# v\n", spew.Sdump(results))
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}
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}
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if err := s.Delete("foo", func(d *store.DeleteOptions) {}); err != nil {
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t.Errorf("Delete failed (%v)", err)
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}
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if results, err := s.Read("foo", store.ReadPrefix()); err != nil {
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t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
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} else {
|
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if len(results) != 0 {
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t.Errorf("Expected 0 items, got %d (%# v)", len(results), spew.Sdump(results))
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}
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}
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// Write 3 records with various expiry and get with Suffix
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records = []*store.Record{
|
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&store.Record{
|
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Key: "foo",
|
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Value: []byte("foofoo"),
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},
|
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&store.Record{
|
||||
Key: "barfoo",
|
||||
Value: []byte("barfoobarfoo"),
|
||||
Expiry: time.Millisecond * 100,
|
||||
},
|
||||
&store.Record{
|
||||
Key: "bazbarfoo",
|
||||
Value: []byte("bazbarfoobazbarfoo"),
|
||||
Expiry: 2 * time.Millisecond * 100,
|
||||
},
|
||||
}
|
||||
for _, r := range records {
|
||||
if err := s.Write(r); err != nil {
|
||||
t.Errorf("Couldn't write k: %s, v: %# v (%s)", r.Key, pretty.Formatter(r.Value), err)
|
||||
}
|
||||
}
|
||||
if results, err := s.Read("foo", store.ReadSuffix()); err != nil {
|
||||
t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
|
||||
} else {
|
||||
if len(results) != 3 {
|
||||
t.Errorf("Expected 3 items, got %d", len(results))
|
||||
t.Logf("Table test: %v\n", spew.Sdump(results))
|
||||
}
|
||||
|
||||
}
|
||||
time.Sleep(time.Millisecond * 100)
|
||||
if results, err := s.Read("foo", store.ReadSuffix()); err != nil {
|
||||
t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
|
||||
} else {
|
||||
if len(results) != 2 {
|
||||
t.Errorf("Expected 2 items, got %d", len(results))
|
||||
t.Logf("Table test: %v\n", spew.Sdump(results))
|
||||
}
|
||||
|
||||
}
|
||||
time.Sleep(time.Millisecond * 100)
|
||||
if results, err := s.Read("foo", store.ReadSuffix()); err != nil {
|
||||
t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
|
||||
} else {
|
||||
if len(results) != 1 {
|
||||
t.Errorf("Expected 1 item, got %d", len(results))
|
||||
t.Logf("Table test: %# v\n", spew.Sdump(results))
|
||||
}
|
||||
}
|
||||
if err := s.Delete("foo"); err != nil {
|
||||
t.Errorf("Delete failed (%v)", err)
|
||||
}
|
||||
if results, err := s.Read("foo", store.ReadSuffix()); err != nil {
|
||||
t.Errorf("Couldn't read all \"foo\" keys, got %# v (%s)", spew.Sdump(results), err)
|
||||
} else {
|
||||
if len(results) != 0 {
|
||||
t.Errorf("Expected 0 items, got %d (%# v)", len(results), spew.Sdump(results))
|
||||
}
|
||||
}
|
||||
|
||||
// Test Table, Suffix and WriteOptions
|
||||
if err := s.Write(&store.Record{
|
||||
Key: "foofoobarbar",
|
||||
Value: []byte("something"),
|
||||
}, store.WriteTTL(time.Millisecond*100)); err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
if err := s.Write(&store.Record{
|
||||
Key: "foofoo",
|
||||
Value: []byte("something"),
|
||||
}, store.WriteExpiry(time.Now().Add(time.Millisecond*100))); err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
if err := s.Write(&store.Record{
|
||||
Key: "barbar",
|
||||
Value: []byte("something"),
|
||||
// TTL has higher precedence than expiry
|
||||
}, store.WriteExpiry(time.Now().Add(time.Hour)), store.WriteTTL(time.Millisecond*100)); err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
if results, err := s.Read("foo", store.ReadPrefix(), store.ReadSuffix()); err != nil {
|
||||
t.Error(err)
|
||||
} else {
|
||||
if len(results) != 1 {
|
||||
t.Errorf("Expected 1 results, got %d: %# v", len(results), spew.Sdump(results))
|
||||
}
|
||||
}
|
||||
time.Sleep(time.Millisecond * 100)
|
||||
if results, err := s.List(); err != nil {
|
||||
t.Errorf("List failed: %s", err)
|
||||
} else {
|
||||
if len(results) != 0 {
|
||||
t.Errorf("Expiry options were not effective, results :%v", spew.Sdump(results))
|
||||
}
|
||||
}
|
||||
s.Write(&store.Record{Key: "a", Value: []byte("a")})
|
||||
s.Write(&store.Record{Key: "aa", Value: []byte("aa")})
|
||||
s.Write(&store.Record{Key: "aaa", Value: []byte("aaa")})
|
||||
if results, err := s.Read("b", store.ReadPrefix()); err != nil {
|
||||
t.Error(err)
|
||||
} else {
|
||||
if len(results) != 0 {
|
||||
t.Errorf("Expected 0 results, got %d", len(results))
|
||||
}
|
||||
}
|
||||
|
||||
s.Init()
|
||||
if err := s.(*fileStore).deleteAll(); err != nil {
|
||||
t.Logf("Can't delete all: %v", err)
|
||||
}
|
||||
for i := 0; i < 10; i++ {
|
||||
s.Write(&store.Record{
|
||||
Key: fmt.Sprintf("a%d", i),
|
||||
Value: []byte{},
|
||||
})
|
||||
}
|
||||
if results, err := s.Read("a", store.ReadLimit(5), store.ReadPrefix()); err != nil {
|
||||
t.Error(err)
|
||||
} else {
|
||||
if len(results) != 5 {
|
||||
t.Error("Expected 5 results, got ", len(results))
|
||||
}
|
||||
if results[0].Key != "a0" {
|
||||
t.Errorf("Expected a0, got %s", results[0].Key)
|
||||
}
|
||||
if results[4].Key != "a4" {
|
||||
t.Errorf("Expected a4, got %s", results[4].Key)
|
||||
}
|
||||
}
|
||||
if results, err := s.Read("a", store.ReadLimit(30), store.ReadOffset(5), store.ReadPrefix()); err != nil {
|
||||
t.Error(err)
|
||||
} else {
|
||||
if len(results) != 5 {
|
||||
t.Error("Expected 5 results, got ", len(results))
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user