move out cache implementations

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

cache/memcache/memcache.go

@@ -1,80 +0,0 @@
-// Package memcache is a memcache implementation of the Cache
-package memcache
-
-import (
-	"encoding/json"
-
-	"github.com/bradfitz/gomemcache/memcache"
-	"github.com/unistack-org/micro/v3/cache"
-)
-
-type memcacheCache struct {
-	options cache.Options
-	client  *memcache.Client
-}
-
-type memcacheItem struct {
-	Key   string
-	Value interface{}
-}
-
-func (m *memcacheCache) Init(opts ...cache.Option) error {
-	for _, o := range opts {
-		o(&m.options)
-	}
-	return nil
-}
-
-func (m *memcacheCache) Get(key string) (interface{}, error) {
-	item, err := m.client.Get(key)
-	if err != nil {
-		return nil, err
-	}
-
-	var mc *memcacheItem
-
-	if err := json.Unmarshal(item.Value, &mc); err != nil {
-		return nil, err
-	}
-
-	return mc.Value, nil
-}
-
-func (m *memcacheCache) Set(key string, val interface{}) error {
-	b, err := json.Marshal(val)
-	if err != nil {
-		return err
-	}
-
-	return m.client.Set(&memcache.Item{
-		Key:   key,
-		Value: b,
-	})
-}
-
-func (m *memcacheCache) Delete(key string) error {
-	return m.client.Delete(key)
-}
-
-func (m *memcacheCache) String() string {
-	return "memcache"
-}
-
-// NewCache returns a new memcache Cache
-func NewCache(opts ...cache.Option) cache.Cache {
-	var options cache.Options
-	for _, o := range opts {
-		o(&options)
-	}
-
-	// get and set the nodes
-	nodes := options.Nodes
-	if len(nodes) == 0 {
-		nodes = []string{"localhost:11211"}
-	}
-
-	return &memcacheCache{
-		options: options,
-		client:  memcache.New(nodes...),
-	}
-}

cache/memory/memory.go

@@ -1,56 +0,0 @@
-// Package memory is an in memory cache
-package memory
-
-import (
-	"sync"
-
-	"github.com/unistack-org/micro/v3/cache"
-	"github.com/unistack-org/micro/v3/errors"
-)
-
-type memoryCache struct {
-	// TODO: use a decent caching library
-	sync.RWMutex
-	values map[string]interface{}
-}
-
-func (m *memoryCache) Init(opts ...cache.Option) error {
-	// TODO: implement
-	return nil
-}
-
-func (m *memoryCache) Get(key string) (interface{}, error) {
-	m.RLock()
-	defer m.RUnlock()
-
-	v, ok := m.values[key]
-	if !ok {
-		return nil, errors.NotFound("go.micro.cache", key+" not found")
-	}
-
-	return v, nil
-}
-
-func (m *memoryCache) Set(key string, val interface{}) error {
-	m.Lock()
-	m.values[key] = val
-	m.Unlock()
-	return nil
-}
-
-func (m *memoryCache) Delete(key string) error {
-	m.Lock()
-	delete(m.values, key)
-	m.Unlock()
-	return nil
-}
-
-func (m *memoryCache) String() string {
-	return "memory"
-}
-
-func NewCache(opts ...cache.Option) cache.Cache {
-	return &memoryCache{
-		values: make(map[string]interface{}),
-	}
-}

go.mod

@@ -4,7 +4,6 @@ go 1.15
 
 require (
 	github.com/BurntSushi/toml v0.3.1
-	github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b
 	github.com/caddyserver/certmagic v0.10.6
 	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible