Add 'user friendly' datastore API.

service/datastore/pls.go

Index: service/datastore/pls.go
diff --git a/service/rawdatastore/datastore.go b/service/datastore/pls.go
similarity index 74%
rename from service/rawdatastore/datastore.go
rename to service/datastore/pls.go
index 6d7acb0a20f9c4736f35a2b21ca01de3d95281ea..96accb8e444119636a930e7c65c4b033f6d86cac 100644
--- a/service/rawdatastore/datastore.go
+++ b/service/datastore/pls.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-package rawdatastore
+package datastore
 
 import (
 	"reflect"
@@ -16,16 +16,19 @@ func GetPLS(o interface{}) PropertyLoadSaver {
 		return &structPLS{c: &structCodec{problem: ErrInvalidEntityType}}
 	}
 	v = v.Elem()
-	t := v.Type()
+	c := getCodec(v.Type())
+	return &structPLS{v, c}
+}
 
+func getCodec(structType reflect.Type) *structCodec {
 	structCodecsMutex.RLock()
-	if c, ok := structCodecs[t]; ok {
-		structCodecsMutex.RUnlock()
-		return &structPLS{v, c}
-	}
+	c, ok := structCodecs[structType]
 	structCodecsMutex.RUnlock()
+	if ok {
+		return c
+	}
 
 	structCodecsMutex.Lock()
 	defer structCodecsMutex.Unlock()
-	return &structPLS{v, getStructCodecLocked(t)}
+	return getStructCodecLocked(structType)
 }