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Switch from Guava Optionals to Java 8 Optionals

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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
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6
java/google/registry/dns/writer/clouddns/CloudDnsWriter.java
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@ -24,7 +24,6 @@ import com.google.api.services.dns.model.Change;
import com.google.api.services.dns.model.ResourceRecordSet;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
@ -49,6 +48,7 @@ import java.net.InetAddress;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.Callable;
import javax.inject.Inject;
@ -116,7 +116,7 @@ public class CloudDnsWriter extends BaseDnsWriter {
// Load the target domain. Note that it can be null if this domain was just deleted.
Optional<DomainResource> domainResource =
Optional.fromNullable(loadByForeignKey(DomainResource.class, domainName, clock.nowUtc()));
Optional.ofNullable(loadByForeignKey(DomainResource.class, domainName, clock.nowUtc()));
// Return early if no DNS records should be published.
// desiredRecordsBuilder is populated with an empty set to indicate that all existing records
@ -186,7 +186,7 @@ public class CloudDnsWriter extends BaseDnsWriter {
// desiredRecords is populated with an empty set to indicate that all existing records
// should be deleted.
Optional<HostResource> host =
Optional.fromNullable(loadByForeignKey(HostResource.class, hostName, clock.nowUtc()));
Optional.ofNullable(loadByForeignKey(HostResource.class, hostName, clock.nowUtc()));
// Return early if the host is deleted.
if (!host.isPresent()) {