GetMulti, untested

admin.go

@@ -2,10 +2,10 @@ package value
 
 import (
 	"errors"
-	"time"
 	"fmt"
-	"net/http"
 	"html/template"
+	"net/http"
+	"time"
 
 	"appengine"
 	"appengine/datastore"

value.go

@@ -67,6 +67,50 @@ func Get(c appengine.Context, key string) string {
 	return e.Value
 }
 
+func GetMulti(c appengine.Context, key ...string) map[string]string {
+	m := map[string]string{}
+
+	// Get whatever values we can from memcache
+	mi, err := memcache.GetMulti(c, key)
+	if err != nil {
+		c.Errorf("error getting multi from memcache: %v", err)
+	}
+	for k, i := range mi {
+		m[k[len(MemcacheKeyPrefix):]] = string(i.Value)
+	}
+	if len(mi) == len(key) {
+		// All values found in memcahe!
+		return m
+	}
+
+	// Get values not found in memcache from datastore.
+	keys := []*datastore.Key{}
+	for _, k := range key {
+		if _, ok := mi[k]; !ok {
+			keys = append(keys, datastore.NewKey(c, Kind, k, 0, nil))
+		}
+	}
+	fromDS := []e{}
+	if err := datastore.GetMulti(c, keys, fromDS); err != nil {
+		c.Errorf("error getting multi from datastore: %v", err)
+		return map[string]string{}
+	}
+	items := []*memcache.Item{}
+	for i, de := range fromDS {
+		m[keys[i].StringID()] = de.Value
+		items = append(items, &memcache.Item{
+			Key:   MemcacheKeyPrefix+keys[i].StringID(),
+			Value: []byte(de.Value),
+		})
+	}
+
+	// Store values in memcache for next time.
+	if err := memcache.SetMulti(c, items); err != nil {
+		c.Errorf("error setting multi in memcache: %v", err)
+	}
+	return m
+}
+
 var vals = map[string]*string{}
 
 func String(key string) *string {