Add rcache => cache

registry/cache/README.md

@@ -0,0 +1,31 @@
+# Registry Cache 
+
+Cache is a library that provides a caching layer for the go-micro [registry](https://godoc.org/github.com/micro/go-micro/registry#Registry).
+
+If you're looking for caching in your microservices use the [selector](https://micro.mu/docs/fault-tolerance.html#caching-discovery).
+
+## Interface
+
+```
+// Cache is the registry cache interface
+type Cache interface {
+	// embed the registry interface
+	registry.Registry
+	// stop the cache watcher
+	Stop()
+}
+```
+
+## Usage
+
+```
+import (
+	"github.com/micro/go-micro/registry"
+	"github.com/micro/go-micro/registry/cache"
+)
+
+r := registry.NewRegistry()
+cache := cache.New(r)
+
+services, _ := cache.GetService("my.service")
+```