Switch from Guava Optionals to Java 8 Optionals

This was a surprisingly involved change. Some of the difficulties included
java.util.Optional purposely not being Serializable (so I had to move a
few Optionals in mapreduce classes to @Nullable) and having to add the Truth
Java8 extension library for assertion support.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=171863777
This commit is contained in:
mcilwain 2017-10-11 13:09:26 -07:00 committed by jianglai
parent 184b2b56ac
commit c0f8da0c6e
581 changed files with 1325 additions and 932 deletions

View file

@ -23,7 +23,6 @@ import static google.registry.util.PipelineUtils.createJobPath;
import static java.util.stream.Collectors.joining;
import com.google.appengine.tools.mapreduce.Mapper;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.net.InternetDomainName;
import com.googlecode.objectify.Key;
@ -43,6 +42,7 @@ import google.registry.util.FormattingLogger;
import google.registry.xjc.JaxbFragment;
import google.registry.xjc.rdehost.XjcRdeHost;
import google.registry.xjc.rdehost.XjcRdeHostElement;
import java.util.Optional;
import javax.inject.Inject;
import org.joda.time.DateTime;
@ -191,7 +191,7 @@ public class RdeHostLinkAction implements Runnable {
Optional<InternetDomainName> tld = findTldForName(hostName);
// out of zone hosts cannot be linked
if (!tld.isPresent()) {
return Optional.absent();
return Optional.empty();
}
// This is a subordinate host
String domainName =