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Make Registrar load methods return Optionals instead of Nullables

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This makes the code more understandable from callsites, and also forces
users of this function to deal with the situation where the registrar
with a given client ID might not be present (it was previously silently
NPEing from some of the callsites).

This also adds a test helper method loadRegistrar(clientId) that retains
the old functionality for terseness in tests. It also fixes some instances
of using the load method with the wrong cachedness -- some uses in high-
traffic situations (WHOIS) that should have caching, but also low-traffic
reporting that don't benefit from caching so might as well always be
current.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=162990468
This commit is contained in:
mcilwain 2017-07-24 14:43:20 -07:00 • committed by Ben McIlwain
parent 84fdeebc2f
commit d536cef20f
81 changed files with 707 additions and 602 deletions
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19
java/google/registry/model/registrar/Registrar.java
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@ -36,8 +36,10 @@ import static google.registry.util.X509Utils.getCertificateHash;
import static google.registry.util.X509Utils.loadCertificate;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.base.Strings;
import com.google.common.base.Supplier;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;
@ -901,15 +903,16 @@ public class Registrar extends ImmutableObject implements Buildable, Jsonifiable
return CACHE_BY_CLIENT_ID.get().values();
}
/** Load a registrar entity by its client id directly from Datastore. */
@Nullable
public static Registrar loadByClientId(String clientId) {
return ofy().load().type(Registrar.class).parent(getCrossTldKey()).id(clientId).now();
/** Loads and returns a registrar entity by its client id directly from Datastore. */
public static Optional<Registrar> loadByClientId(String clientId) {
checkArgument(!Strings.isNullOrEmpty(clientId), "clientId must be specified");
return Optional.fromNullable(
ofy().load().type(Registrar.class).parent(getCrossTldKey()).id(clientId).now());
}
/** Load a registrar entity by its client id using an in-memory cache. */
@Nullable
public static Registrar loadByClientIdCached(String clientId) {
return CACHE_BY_CLIENT_ID.get().get(clientId);
/** Loads and returns a registrar entity by its client id using an in-memory cache. */
public static Optional<Registrar> loadByClientIdCached(String clientId) {
checkArgument(!Strings.isNullOrEmpty(clientId), "clientId must be specified");
return Optional.fromNullable(CACHE_BY_CLIENT_ID.get().get(clientId));
}
}