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0267214841
Only Ofy itself and its two helpers (AugmentedSaver and AugmentedDeleter) need to use the real ofy(). All other callers should be using Ofy. Fixing this even though it doesn't change anything because I found it baffling to follow the code while trying to make a small change. Update: added a presubmit to enforce this. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=154456603
96 lines
3.3 KiB
Java
96 lines
3.3 KiB
Java
// Copyright 2017 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.model.ofy;
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import static com.google.common.base.Functions.constant;
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import static com.google.common.base.Preconditions.checkState;
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import static com.google.common.collect.Maps.filterValues;
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import static com.google.common.collect.Maps.toMap;
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import static google.registry.model.ofy.CommitLogBucket.getArbitraryBucketId;
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import static google.registry.model.ofy.ObjectifyService.ofy;
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import com.google.common.base.Predicate;
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import com.google.common.base.Predicates;
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import com.google.common.collect.FluentIterable;
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import com.google.common.collect.ImmutableMap;
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import com.google.common.collect.ImmutableSet;
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import com.googlecode.objectify.Key;
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import java.util.Map;
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import org.joda.time.DateTime;
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/** Metadata for an {@link Ofy} transaction that saves commit logs. */
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class TransactionInfo {
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private static final Predicate<Object> IS_DELETE = Predicates.<Object>equalTo(Delete.SENTINEL);
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private enum Delete { SENTINEL }
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/** Logical "now" of the transaction. */
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DateTime transactionTime;
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/** Whether this is a read-only transaction. */
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private boolean readOnly;
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/** Bucket shard to under which commit log will be stored, chosen at random (in production). */
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final Key<CommitLogBucket> bucketKey = CommitLogBucket.getBucketKey(getArbitraryBucketId());
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/**
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* Accumulator of save/delete operations performed in transaction.
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*
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* <p>The {@link ImmutableMap} builder provides us the benefit of not permitting duplicates.
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* This allows us to avoid potential race conditions where the same key is mutated twice in a
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* transaction.
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*/
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private final ImmutableMap.Builder<Key<?>, Object> changesBuilder = new ImmutableMap.Builder<>();
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TransactionInfo(DateTime now) {
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this.transactionTime = now;
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ofy().load().key(bucketKey); // Asynchronously load value into session cache.
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}
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TransactionInfo setReadOnly() {
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this.readOnly = true;
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return this;
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}
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void assertNotReadOnly() {
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checkState(!readOnly, "This is a read only transaction.");
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}
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void putSaves(Map<Key<?>, ?> keysToEntities) {
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assertNotReadOnly();
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changesBuilder.putAll(keysToEntities);
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}
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void putDeletes(Iterable<Key<?>> keys) {
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assertNotReadOnly();
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changesBuilder.putAll(toMap(keys, constant(TransactionInfo.Delete.SENTINEL)));
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}
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ImmutableSet<Key<?>> getTouchedKeys() {
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return ImmutableSet.copyOf(changesBuilder.build().keySet());
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}
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ImmutableSet<Key<?>> getDeletes() {
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return ImmutableSet.copyOf(filterValues(changesBuilder.build(), IS_DELETE).keySet());
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}
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ImmutableSet<Object> getSaves() {
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return FluentIterable
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.from(changesBuilder.build().values())
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.filter(Predicates.not(IS_DELETE))
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.toSet();
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}
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}
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