Remove unused and misused methods from EppResourceUtils and DomainBase.

The methods in DomainBase were the only callers for the methods in
EppResourceUtils, so I first inlined them. Then I realized that there
were no callers for loadReferencedContacts() anywhere. For loadNameservers(),
all but one invocation actually wanted to load the foreign keys, and was
repeating that work, so I replaced it with loadNameserverFullyQualifiedHostNames().
The last invocation, in the Rdap code, was incorrectly assuming this was an async
load when in fact it blocks, so I replaced it with a real async load.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=122433897

java/google/registry/dns/writer/dnsupdate/DnsUpdateWriter.java

@@ -16,6 +16,7 @@ package google.registry.dns.writer.dnsupdate;
 
 import static com.google.common.base.Verify.verify;
 import static google.registry.model.EppResourceUtils.loadByUniqueId;
+import static google.registry.model.ofy.ObjectifyService.ofy;
 
 import com.google.common.net.InternetDomainName;
 
@@ -102,7 +103,8 @@ public class DnsUpdateWriter implements DnsWriter {
       Update update = new Update(toAbsoluteName(findTldFromName(domainName)));
       update.delete(toAbsoluteName(domainName), Type.ANY);
       if (domain != null && domain.shouldPublishToDns()) {
-        update.add(makeNameServerSet(domainName, domain.loadNameservers()));
+        update.add(makeNameServerSet(
+            domainName, ofy().load().refs(domain.getNameservers()).values()));
         update.add(makeDelegationSignerSet(domainName, domain.getDsData()));
       }
 

java/google/registry/model/EppResourceUtils.java

@@ -24,7 +24,6 @@ import static google.registry.util.DateTimeUtils.isBeforeOrAt;
 import static google.registry.util.DateTimeUtils.latestOf;
 
 import com.google.common.base.Function;
-import com.google.common.collect.ImmutableSet;
 
 import com.googlecode.objectify.Key;
 import com.googlecode.objectify.Ref;
@@ -138,29 +137,6 @@ public final class EppResourceUtils {
         latestOf(now, resource.getUpdateAutoTimestamp().getTimestamp()));
   }
 
-  /** Loads and returns the hosts specified by the given reference. */
-  public static ImmutableSet<HostResource> loadReferencedNameservers(
-      Set<Ref<HostResource>> hostRefs) {
-    ImmutableSet.Builder<HostResource> builder = new ImmutableSet.Builder<>();
-    for (Ref<HostResource> hostRef : hostRefs) {
-      HostResource host = hostRef.get();
-      if (host != null) {
-        builder.add(host);
-      }
-    }
-    return builder.build();
-  }
-
-  /** Loads and returns the contacts specified by the given references. */
-  public static ImmutableSet<ContactResource> loadReferencedContacts(
-      Set<Ref<ContactResource>> contactRefs) {
-    ImmutableSet.Builder<ContactResource> builder = new ImmutableSet.Builder<>();
-    for (Ref<ContactResource> contactRef : contactRefs) {
-      builder.add(contactRef.get());
-    }
-    return builder.build();
-  }
-
   /**
    * Checks multiple {@link EppResource} objects from the datastore by unique ids.
    * <p>

java/google/registry/model/domain/DomainBase.java

@@ -19,12 +19,15 @@ import static com.google.common.base.Strings.isNullOrEmpty;
 import static com.google.common.collect.Sets.difference;
 import static com.google.common.collect.Sets.union;
 import static google.registry.model.domain.DesignatedContact.Type.REGISTRANT;
+import static google.registry.model.ofy.ObjectifyService.ofy;
 import static google.registry.util.CollectionUtils.nullToEmpty;
 import static google.registry.util.CollectionUtils.nullToEmptyImmutableCopy;
 import static google.registry.util.CollectionUtils.nullToEmptyImmutableSortedCopy;
 import static google.registry.util.CollectionUtils.union;
 import static google.registry.util.DomainNameUtils.getTldFromSld;
 
+import com.google.common.base.Function;
+import com.google.common.collect.FluentIterable;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSortedSet;
 
@@ -37,7 +40,6 @@ import com.googlecode.objectify.annotation.OnLoad;
 import com.googlecode.objectify.condition.IfNull;
 
 import google.registry.model.EppResource;
-import google.registry.model.EppResourceUtils;
 import google.registry.model.contact.ContactResource;
 import google.registry.model.domain.launch.LaunchNotice;
 import google.registry.model.domain.secdns.DelegationSignerData;
@@ -161,9 +163,16 @@ public abstract class DomainBase extends EppResource {
     return builder.build();
   }
 
-  /** Loads and returns all linked nameservers. */
-  public ImmutableSet<HostResource> loadNameservers() {
-    return EppResourceUtils.loadReferencedNameservers(getNameservers());
+  /** Loads and returns the fully qualified host names of all linked nameservers. */
+  public ImmutableSet<String> loadNameserverFullyQualifiedHostNames() {
+    return FluentIterable.from(ofy().load().refs(getNameservers()).values())
+        .transform(
+            new Function<HostResource, String>() {
+              @Override
+              public String apply(HostResource host) {
+                return host.getFullyQualifiedHostName();
+              }})
+        .toSet();
   }
 
   public Ref<ContactResource> getRegistrant() {
@@ -192,11 +201,6 @@ public abstract class DomainBase extends EppResource {
     return contactsBuilder.build();
   }
 
-  /** Loads and returns all referenced contacts from this domain or application. */
-  public ImmutableSet<ContactResource> loadReferencedContacts() {
-    return EppResourceUtils.loadReferencedContacts(getReferencedContacts());
-  }
-
   public String getTld() {
     return tld;
   }

java/google/registry/rdap/RdapJsonFormatter.java

@@ -397,7 +397,8 @@ public class RdapJsonFormatter {
       @Nullable String linkBase,
       @Nullable String whoisServer) {
     // Kick off the database loads of the nameservers that we will need.
-    ImmutableSet<HostResource> loadedHosts = domainResource.loadNameservers();
+    Map<Key<HostResource>, HostResource> loadedHosts =
+        ofy().load().refs(domainResource.getNameservers());
     // And the registrant and other contacts.
     List<DesignatedContact> allContacts = new ArrayList<>();
     if (domainResource.getRegistrant() != null) {
@@ -427,7 +428,8 @@ public class RdapJsonFormatter {
     }
     // Nameservers
     ImmutableList.Builder<Object> nsBuilder = new ImmutableList.Builder<>();
-    for (HostResource hostResource : HOST_RESOURCE_ORDERING.immutableSortedCopy(loadedHosts)) {
+    for (HostResource hostResource
+        : HOST_RESOURCE_ORDERING.immutableSortedCopy(loadedHosts.values())) {
       nsBuilder.add(makeRdapJsonForHost(hostResource, false, linkBase, null));
     }
     ImmutableList<Object> ns = nsBuilder.build();

java/google/registry/rde/DomainResourceToXjcConverter.java

@@ -25,7 +25,6 @@ import google.registry.model.domain.DomainResource;
 import google.registry.model.domain.rgp.GracePeriodStatus;
 import google.registry.model.domain.secdns.DelegationSignerData;
 import google.registry.model.eppcommon.StatusValue;
-import google.registry.model.host.HostResource;
 import google.registry.model.rde.RdeMode;
 import google.registry.model.transfer.TransferData;
 import google.registry.model.transfer.TransferStatus;
@@ -141,11 +140,11 @@ final class DomainResourceToXjcConverter {
     //    it is that with host attributes, you inline the nameserver data
     //    on each domain; with host objects, you normalize the nameserver
     //    data to a separate EPP object.
-    ImmutableSet<HostResource> linkedNameservers = model.loadNameservers();
-    if (!linkedNameservers.isEmpty()) {
+    ImmutableSet<String> linkedNameserverHostNames = model.loadNameserverFullyQualifiedHostNames();
+    if (!linkedNameserverHostNames.isEmpty()) {
       XjcDomainNsType nameservers = new XjcDomainNsType();
-      for (HostResource host : linkedNameservers) {
-        nameservers.getHostObjs().add(host.getFullyQualifiedHostName());
+      for (String hostName : linkedNameserverHostNames) {
+        nameservers.getHostObjs().add(hostName);
       }
       bean.setNs(nameservers);
     }

java/google/registry/tools/AllocateDomainCommand.java

@@ -48,7 +48,6 @@ import google.registry.model.domain.launch.LaunchNotice;
 import google.registry.model.domain.secdns.DelegationSignerData;
 import google.registry.model.eppinput.EppInput;
 import google.registry.model.eppinput.EppInput.ResourceCommandWrapper;
-import google.registry.model.host.HostResource;
 import google.registry.model.reporting.HistoryEntry;
 import google.registry.model.smd.SignedMark;
 import google.registry.tools.soy.DomainAllocateSoyInfo;
@@ -146,13 +145,7 @@ final class AllocateDomainCommand extends MutatingEppToolCommand {
             addSoyRecord(application.getCurrentSponsorClientId(), new SoyMapData(
                 "name", application.getFullyQualifiedDomainName(),
                 "period", period.getValue(),
-                "nameservers", FluentIterable.from(application.loadNameservers())
-                    .transform(new Function<HostResource, String>() {
-                        @Override
-                        public String apply(HostResource host) {
-                          return host.getForeignKey();
-                        }})
-                    .toList(),
+                "nameservers", application.loadNameserverFullyQualifiedHostNames(),
                 "registrant", application.loadRegistrant().getForeignKey(),
                 "contacts", contactsMapBuilder.build(),
                 "authInfo", application.getAuthInfo().getPw().getValue(),

java/google/registry/tools/GenerateDnsReportCommand.java

@@ -104,12 +104,8 @@ final class GenerateDnsReportCommand implements RemoteApiCommand, GtechCommand {
     }
 
     private void write(DomainResource domain) {
-      ImmutableList<String> nameservers = FluentIterable.from(domain.loadNameservers())
-          .transform(new Function<HostResource, String>() {
-              @Override
-              public String apply(HostResource host) {
-                return host.getForeignKey();
-              }})
+      ImmutableList<String> nameservers = FluentIterable
+          .from(domain.loadNameserverFullyQualifiedHostNames())
           .toSortedList(Ordering.natural());
       ImmutableList<Map<String, ?>> dsData = FluentIterable.from(domain.getDsData())
           .transform(new Function<DelegationSignerData, Map<String, ?>>() {

java/google/registry/whois/DomainWhoisResponse.java

@@ -34,7 +34,6 @@ import google.registry.model.domain.DesignatedContact.Type;
 import google.registry.model.domain.DomainResource;
 import google.registry.model.domain.GracePeriod;
 import google.registry.model.eppcommon.StatusValue;
-import google.registry.model.host.HostResource;
 import google.registry.model.registrar.Registrar;
 import google.registry.model.translators.EnumToAttributeAdapter.EppEnum;
 import google.registry.util.FormattingLogger;
@@ -89,11 +88,11 @@ final class DomainWhoisResponse extends WhoisResponseImpl {
       .emitContact("Billing", getContactReference(Type.BILLING), preferUnicode)
       .emitSet(
           "Name Server",
-          domain.loadNameservers(),
-          new Function<HostResource, String>() {
+          domain.loadNameserverFullyQualifiedHostNames(),
+          new Function<String, String>() {
             @Override
-            public String apply(HostResource host) {
-              return maybeFormatHostname(host.getFullyQualifiedHostName(), preferUnicode);
+            public String apply(String hostName) {
+              return maybeFormatHostname(hostName, preferUnicode);
             }})
       .emitField("DNSSEC", isNullOrEmpty(domain.getDsData()) ? "unsigned" : "signedDelegation")
       .emitLastUpdated(getTimestamp())