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e2528875b2
This eliminates the use of Objectify polymorphism for EPP resources entirely (yay!), which makes the Registry 3.0 database migration easier. It is unfortunate that the naming parallelism of EppResources is lost between ContactResource, HostResource, and DomainResource, but the actual type as far as Datastore was concerned was DomainBase all along, and it would be a much more substantial data migration to allow us to continue using the class name DomainResource now that we're no longer using Objectify polymorphism. This simply isn't worth it. This also removes the polymorphic Datastore indexes (which will no longer function as of this change). The non-polymorphic replacement indexes were added in [] ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=230930546
88 lines
3.3 KiB
Java
88 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.mapreduce.inputs;
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import static com.google.common.collect.ImmutableSet.toImmutableSet;
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import static google.registry.model.ofy.ObjectifyService.ofy;
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import com.google.appengine.api.datastore.Cursor;
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import com.google.appengine.api.datastore.QueryResultIterator;
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import com.google.appengine.tools.mapreduce.InputReader;
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import com.google.common.collect.ImmutableSet;
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import com.googlecode.objectify.Key;
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import com.googlecode.objectify.cmd.Query;
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import google.registry.model.EppResource;
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import google.registry.model.index.EppResourceIndex;
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import google.registry.model.index.EppResourceIndexBucket;
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import javax.annotation.Nullable;
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/** Base class for {@link InputReader} classes that map over {@link EppResourceIndex}. */
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abstract class EppResourceBaseReader<T> extends RetryingInputReader<EppResourceIndex, T> {
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/** Number of bytes in 1MB of memory, used for memory estimates. */
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static final long ONE_MB = 1024 * 1024;
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private static final long serialVersionUID = 7942584269402339168L;
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/**
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* The resource kinds to filter for.
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*
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* <p>This can be empty, or any of {"ContactResource", "HostResource", "DomainBase"}. It will
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* never contain "EppResource" since this isn't an actual kind in Datastore.
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*/
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private final ImmutableSet<String> filterKinds;
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private final Key<EppResourceIndexBucket> bucketKey;
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private final long memoryEstimate;
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EppResourceBaseReader(
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Key<EppResourceIndexBucket> bucketKey,
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long memoryEstimate,
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ImmutableSet<String> filterKinds) {
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this.bucketKey = bucketKey;
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this.memoryEstimate = memoryEstimate;
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this.filterKinds = filterKinds;
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}
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@Override
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public QueryResultIterator<EppResourceIndex> getQueryIterator(@Nullable Cursor cursor) {
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return startQueryAt(query(), cursor).iterator();
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}
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@Override
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public int getTotal() {
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return query().count();
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}
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/** Query for children of this bucket. */
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Query<EppResourceIndex> query() {
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Query<EppResourceIndex> query = ofy().load().type(EppResourceIndex.class).ancestor(bucketKey);
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return filterKinds.isEmpty() ? query : query.filter("kind in", filterKinds);
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}
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/** Returns the estimated memory that will be used by this reader in bytes. */
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@Override
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public long estimateMemoryRequirement() {
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return memoryEstimate;
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}
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static <R extends EppResource> ImmutableSet<String> varargsToKinds(
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ImmutableSet<Class<? extends R>> resourceClasses) {
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// Ignore EppResource when finding kinds, since it doesn't have one and doesn't imply filtering.
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return resourceClasses.contains(EppResource.class)
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? ImmutableSet.of()
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: resourceClasses.stream().map(Key::getKind).collect(toImmutableSet());
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}
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}
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