From e864426e822effdab8d840b4f673bd5457d8abed Mon Sep 17 00:00:00 2001 From: Arsen Musayelyan Date: Fri, 18 Feb 2022 09:51:56 -0800 Subject: [PATCH] Initial Commit --- LICENSE | 21 ++++++++ badger.go | 121 +++++++++++++++++++++++++++++++++++++++++++++ go.mod | 27 +++++++++++ go.sum | 143 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ main.go | 43 ++++++++++++++++ 5 files changed, 355 insertions(+) create mode 100644 LICENSE create mode 100644 badger.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..ca2083e --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2021 Arsen Musayelyan + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/badger.go b/badger.go new file mode 100644 index 0000000..b758154 --- /dev/null +++ b/badger.go @@ -0,0 +1,121 @@ +package store + +import ( + "strings" + + "github.com/dgraph-io/badger/v3" + "github.com/vmihailenco/msgpack/v5" +) + +type badgerStore struct { + db *badger.DB +} + +// NewBadger creates a new store from a badger database +func NewBadger(db *badger.DB) Store { + return badgerStore{db} +} + +func (b badgerStore) Set(key string, val interface{}) error { + return b.db.Update(func(txn *badger.Txn) error { + data, err := msgpack.Marshal(val) + if err != nil { + return err + } + return txn.Set([]byte(key), data) + }) +} + +func (b badgerStore) Get(key string, out interface{}) error { + return b.db.View(func(txn *badger.Txn) error { + item, err := txn.Get([]byte(key)) + if err != nil { + return err + } + + return item.Value(func(val []byte) error { + return msgpack.Unmarshal(val, out) + }) + }) +} + +func (b badgerStore) Delete(key string) error { + return b.db.Update(func(txn *badger.Txn) error { + return txn.Delete([]byte(key)) + }) +} + +func (b badgerStore) Iter() Iter { + out := make(chan *Item, 10) + go func() { + b.db.View(func(txn *badger.Txn) error { + opts := badger.DefaultIteratorOptions + it := txn.NewIterator(opts) + defer it.Close() + for it.Rewind(); it.Valid(); it.Next() { + item := it.Item() + key := string(item.KeyCopy(nil)) + valData, err := item.ValueCopy(nil) + if err != nil { + continue + } + + out <- &Item{Key: key, Data: valData} + } + close(out) + return nil + }) + }() + return out +} + +func (b badgerStore) Bucket(name string) Bucket { + return badgerBucket{b, name} +} + +type badgerBucket struct { + store badgerStore + name string +} + +func (b badgerBucket) Name() string { + return b.name +} + +func (b badgerBucket) Set(key string, val interface{}) error { + return b.store.Set(b.name+"\u001f"+key, val) +} + +func (b badgerBucket) Get(key string, out interface{}) error { + return b.store.Get(b.name+"\u001f"+key, out) +} + +func (b badgerBucket) Delete(key string) error { + return b.store.Delete(b.name + "\u001f" + key) +} + +func (b badgerBucket) Iter() Iter { + out := make(chan *Item, 10) + go func() { + b.store.db.View(func(txn *badger.Txn) error { + opts := badger.DefaultIteratorOptions + opts.Prefix = []byte(b.name + "\u001f") + it := txn.NewIterator(opts) + defer it.Close() + for it.Rewind(); it.Valid(); it.Next() { + item := it.Item() + key := string(item.KeyCopy(nil)) + key = strings.TrimPrefix(key, b.name+"\u001f") + valData, err := item.ValueCopy(nil) + if err != nil { + continue + } + + out <- &Item{Key: key, Data: valData} + } + close(out) + return nil + }) + }() + return out +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..39a9afb --- /dev/null +++ b/go.mod @@ -0,0 +1,27 @@ +module go.arsenm.dev/store + +go 1.17 + +require ( + github.com/dgraph-io/badger/v3 v3.2103.2 + github.com/vmihailenco/msgpack/v5 v5.3.5 +) + +require ( + 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/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 v1.12.3 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect + go.opencensus.io v0.22.5 // indirect + golang.org/x/net v0.0.0-20201021035429-f5854403a974 // indirect + golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..8c4b0cb --- /dev/null +++ b/go.sum @@ -0,0 +1,143 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE= +github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU= +github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8= +github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko= +github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc= +github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY= +github.com/cespare/xxhash/v2 v2.1.1/go.mod 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h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/main.go b/main.go new file mode 100644 index 0000000..01b8249 --- /dev/null +++ b/main.go @@ -0,0 +1,43 @@ +package store + +import "github.com/vmihailenco/msgpack/v5" + +// Store represents a key value store +type Store interface { + // Set sets a key to a value + Set(key string, val interface{}) error + // Get places a value at a key into val + Get(key string, val interface{}) error + Delete(key string) error + // Bucket returns a bucket with the specified name + Bucket(name string) Bucket + // Iter returns an iterator + Iter() Iter +} + +// Bucket represents a bucket within a store +type Bucket interface { + // Name returns the bucket name + Name() string + // Set sets a key in the bucket to a value + Set(string, interface{}) error + // Get places a value at a key in the bucket into val + Get(string, interface{}) error + Delete(key string) error + // Iter returns an iterator for the bucket + Iter() Iter +} + +// Item represents an iterator item +type Item struct { + Key string + Data []byte +} + +// Value sets out to the value of the item data +func (it *Item) Value(out interface{}) error { + return msgpack.Unmarshal(it.Data, out) +} + +// Iter represents an iterator channel +type Iter <-chan *Item