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Reduce Datastore load of delete prober data mapreduce

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This eliminates the transactional load of ForeignKeyIndexes and
EppResourceIndexes, the latter of which was problematic because it is parented
on the EppResourceIndexBucket entity group, and can cause concurrent
modification exceptions on live code paths. By removing the transactional load
and only touching that entity group on the delete, the number of potential
concurrent modification exceptions is significantly reduced.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135706974
This commit is contained in:
mcilwain 2016-10-10 12:35:27 -07:00 • committed by Ben McIlwain
parent 6bbfef9eb3
commit dfe0ba32cb
1 changed files with 17 additions and 20 deletions
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33
java/google/registry/batch/DeleteProberDataAction.java
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@ -14,7 +14,6 @@
package google.registry.batch;
import static com.google.common.base.Verify.verifyNotNull;
import static google.registry.mapreduce.MapreduceRunner.PARAM_DRY_RUN;
import static google.registry.model.ofy.ObjectifyService.ofy;
import static google.registry.model.registry.Registries.getTldsOfType;
@ -136,33 +135,31 @@ public class DeleteProberDataAction implements Runnable {
getContext().incrementCounter("skipped, NIC domain");
return;
}
int dependentsDeleted = ofy().transact(new Work<Integer>() {
final Key<EppResourceIndex> eppIndex = Key.create(EppResourceIndex.create(domainKey));
final Key<ForeignKeyIndex<?>> fki = ForeignKeyDomainIndex.createKey(domain);
int entitiesDeleted = ofy().transact(new Work<Integer>() {
@Override
public Integer run() {
EppResourceIndex eppIndex = ofy().load().entity(EppResourceIndex.create(domainKey)).now();
verifyNotNull(eppIndex, "Missing EppResourceIndex for domain %s", domain);
ForeignKeyIndex<?> fki = ofy().load().key(ForeignKeyDomainIndex.createKey(domain)).now();
verifyNotNull(fki, "Missing ForeignKeyDomainIndex for domain %s", domain);
// This ancestor query selects all descendant HistoryEntries, BillingEvents, and
// PollMessages, as well as the domain itself.
// This ancestor query selects all descendant HistoryEntries, BillingEvents, PollMessages,
// and TLD-specific entities, as well as the domain itself.
List<Key<Object>> domainAndDependentKeys = ofy().load().ancestor(domainKey).keys().list();
if (isDryRun) {
logger.infofmt(
"Would delete the following entities: %s",
new ImmutableList.Builder<Object>()
ImmutableSet<Key<?>> allKeys = new ImmutableSet.Builder<Key<?>>()
.add(fki)
.add(eppIndex)
.addAll(domainAndDependentKeys)
.build());
.build();
if (isDryRun) {
logger.infofmt("Would delete the following entities: %s", allKeys);
} else {
ofy().deleteWithoutBackup().keys(domainAndDependentKeys);
ofy().deleteWithoutBackup().entities(eppIndex, fki);
ofy().deleteWithoutBackup().keys(allKeys);
}
return domainAndDependentKeys.size() - 1;
return allKeys.size();
}
});
getContext().incrementCounter(String.format("deleted, kind %s", domainKey.getKind()));
getContext().incrementCounter("deleted, dependent keys", dependentsDeleted);
getContext().incrementCounter("domains deleted");
getContext().incrementCounter("total entities deleted", entitiesDeleted);
}
}
}