[WIP] Store Sync (#1365)

* Initial cache implementation

* Write queue implementation

* Accidentally started writing the storage sync service

store/cache/cache.go

@@ -1,39 +0,0 @@
-package cache
-
-import (
-	"github.com/micro/go-micro/v2/store"
-	"github.com/pkg/errors"
-)
-
-// Cache implements a cache in front of a micro Store
-type Cache struct {
-	options store.Options
-	store.Store
-
-	stores []store.Store
-}
-
-// NewStore returns new cache
-func NewStore(opts ...store.Option) store.Store {
-	s := &Cache{
-		options: store.Options{},
-		stores:  []store.Store{},
-	}
-	for _, o := range opts {
-		o(&s.options)
-	}
-	return s
-}
-
-// Init initialises a new cache
-func (c *Cache) Init(opts ...store.Option) error {
-	for _, o := range opts {
-		o(&c.options)
-	}
-	for _, s := range c.stores {
-		if err := s.Init(); err != nil {
-			return errors.Wrapf(err, "Store %s failed to Init()", s.String())
-		}
-	}
-	return nil
-}

store/cache/cache_test.go

@@ -1,15 +0,0 @@
-package cache
-
-// import "testing"
-
-// func TestCache(t *testing.T) {
-// 	c := NewStore()
-// 	if err := c.Init(); err != nil {
-// 		//t.Fatal(err)
-// 	}
-// 	if results, err := c.Read("test"); err != nil {
-// 		//t.Fatal(err)
-// 	} else {
-// 		println(results)
-// 	}
-// }