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5098b03af4
This change replaces all Ref objects in the code with Key objects. These are
stored in datastore as the same object (raw datastore keys), so this is not
a model change.
Our best practices doc says to use Keys not Refs because:
* The .get() method obscures what's actually going on
- Much harder to visually audit the code for datastore loads
- Hard to distinguish Ref<T> get()'s from Optional get()'s and Supplier get()'s
* Implicit ofy().load() offers much less control
- Antipattern for ultimate goal of making Ofy injectable
- Can't control cache use or batch loading without making ofy() explicit anyway
* Serialization behavior is surprising and could be quite dangerous/incorrect
- Can lead to serialization errors. If it actually worked "as intended",
it would lead to a Ref<> on a serialized object being replaced upon
deserialization with a stale copy of the old value, which could potentially
break all kinds of transactional expectations
* Having both Ref<T> and Key<T> introduces extra boilerplate everywhere
- E.g. helper methods all need to have Ref and Key overloads, or you need to
call .key() to get the Key<T> for every Ref<T> you want to pass in
- Creating a Ref<T> is more cumbersome, since it doesn't have all the create()
overloads that Key<T> has, only create(Key<T>) and create(Entity) - no way to
create directly from kind+ID/name, raw Key, websafe key string, etc.
(Note that Refs are treated specially by Objectify's @Load method and Keys are not;
we don't use that feature, but it is the one advantage Refs have over Keys.)
The direct impetus for this change is that I am trying to audit our use of memcache,
and the implicit .get() calls to datastore were making that very hard.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=131965491
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| .. | ||
| annotations | ||
| billing | ||
| common | ||
| contact | ||
| domain | ||
| eppcommon | ||
| eppinput | ||
| eppoutput | ||
| export | ||
| host | ||
| index | ||
| mark | ||
| ofy | ||
| poll | ||
| pricing | ||
| rde | ||
| registrar | ||
| registry | ||
| reporting | ||
| server | ||
| smd | ||
| tmch | ||
| transfer | ||
| translators | ||
| AbstractFieldExposer.java | ||
| BackupGroupRoot.java | ||
| BUILD | ||
| Buildable.java | ||
| CreateAutoTimestamp.java | ||
| EntityClasses.java | ||
| EppResource.java | ||
| EppResourceUtils.java | ||
| generate_field_exposer.sh | ||
| generate_field_exposer_registry.sh | ||
| ImmutableObject.java | ||
| Jsonifiable.java | ||
| JsonMapBuilder.java | ||
| ModelUtils.java | ||
| package-info.java | ||
| RoidSuffixes.java | ||
| SchemaVersion.java | ||
| UpdateAutoTimestamp.java | ||