Invalidate premium list cache on update

This will only affect the tools service, the primary use case being (1) I go to
create a domain through nomulus tool, realize it's premium, (2) update the
premium list to not include that domain, (3) kill the tools service instance to
wipe out the cached premium value, then (4) create the domain at standard. This
commit eliminates step 3.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=226180160

java/google/registry/model/registry/label/PremiumList.java

@@ -132,16 +132,22 @@ public final class PremiumList extends BaseDomainLabelList<Money, PremiumList.Pr
    * <p>This is cached for a shorter duration because we need to periodically reload this entity to
    * check if a new revision has been published, and if so, then use that.
    */
-  static final LoadingCache<String, PremiumList> cachePremiumLists =
-      CacheBuilder.newBuilder()
-          .expireAfterWrite(getDomainLabelListCacheDuration().getMillis(), MILLISECONDS)
-          .build(
-              new CacheLoader<String, PremiumList>() {
-                @Override
-                public PremiumList load(final String name) {
-                  return ofy().doTransactionless(() -> loadPremiumList(name));
-                }
-              });
+  @NonFinalForTesting
+  static LoadingCache<String, PremiumList> cachePremiumLists =
+      createCachePremiumLists(getDomainLabelListCacheDuration());
+
+  @VisibleForTesting
+  static LoadingCache<String, PremiumList> createCachePremiumLists(Duration cachePersistDuration) {
+    return CacheBuilder.newBuilder()
+        .expireAfterWrite(cachePersistDuration.getMillis(), MILLISECONDS)
+        .build(
+            new CacheLoader<String, PremiumList>() {
+              @Override
+              public PremiumList load(final String name) {
+                return ofy().doTransactionless(() -> loadPremiumList(name));
+              }
+            });
+  }
 
   private static PremiumList loadPremiumList(String name) {
     return ofy().load().type(PremiumList.class).parent(getCrossTldKey()).id(name).now();

java/google/registry/model/registry/label/PremiumListUtils.java

@@ -174,6 +174,12 @@ public final class PremiumListUtils {
       ofy().save().entities(newList, newRevision);
       return newList;
     });
+
+    // Invalidate the cache on this premium list so the change will take effect instantly. This only
+    // clears the cache on the same instance that the update was run on, which will typically be the
+    // only tools instance.
+    PremiumList.cachePremiumLists.invalidate(premiumList.getName());
+
     // TODO(b/79888775): Enqueue the oldPremiumList for deletion after at least
     // RegistryConfig.getDomainLabelListCacheDuration() has elapsed.
     return updated;

javatests/google/registry/model/registry/label/PremiumListUtilsTest.java

@@ -26,6 +26,7 @@ import static google.registry.model.registry.label.DomainLabelMetrics.PremiumLis
 import static google.registry.model.registry.label.DomainLabelMetrics.PremiumListCheckOutcome.UNCACHED_POSITIVE;
 import static google.registry.model.registry.label.DomainLabelMetrics.premiumListChecks;
 import static google.registry.model.registry.label.DomainLabelMetrics.premiumListProcessingTime;
+import static google.registry.model.registry.label.PremiumList.createCachePremiumLists;
 import static google.registry.model.registry.label.PremiumListUtils.deletePremiumList;
 import static google.registry.model.registry.label.PremiumListUtils.doesPremiumListExist;
 import static google.registry.model.registry.label.PremiumListUtils.getPremiumPrice;
@@ -35,7 +36,7 @@ import static google.registry.testing.DatastoreHelper.loadPremiumListEntries;
 import static google.registry.testing.DatastoreHelper.persistPremiumList;
 import static google.registry.testing.DatastoreHelper.persistResource;
 import static google.registry.testing.JUnitBackports.assertThrows;
-import static org.joda.time.Duration.standardMinutes;
+import static org.joda.time.Duration.standardDays;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
@@ -63,9 +64,11 @@ public class PremiumListUtilsTest {
 
   @Before
   public void before() {
-    // createTld() overwrites the premium list, so call it first.
+    // Set long persist times on caches so they can be tested (cache times default to 0 in tests).
     PremiumList.cachePremiumListEntries =
-        PremiumList.createCachePremiumListEntries(standardMinutes(1));
+        PremiumList.createCachePremiumListEntries(standardDays(1));
+    PremiumList.cachePremiumLists = createCachePremiumLists(standardDays(1));
+    // createTld() overwrites the premium list, so call it first.
     createTld("tld");
     PremiumList pl =
         persistPremiumList(
@@ -309,6 +312,16 @@ public class PremiumListUtilsTest {
     assertThat(entriesReloaded.get("test").parent).isEqualTo(resaved.getRevisionKey());
   }
 
+  @Test
+  public void test_savePremiumListAndEntries_clearsCache() {
+    assertThat(PremiumList.cachePremiumLists.getIfPresent("tld")).isNull();
+    PremiumList pl = PremiumList.getCached("tld").get();
+    assertThat(PremiumList.cachePremiumLists.getIfPresent("tld")).isEqualTo(pl);
+    savePremiumListAndEntries(
+        new PremiumList.Builder().setName("tld").build(), ImmutableList.of("test,USD 1"));
+    assertThat(PremiumList.cachePremiumLists.getIfPresent("tld")).isNull();
+  }
+
   @Test
   public void testDelete() {
     persistPremiumList("gtld1", "trombone,USD 10");