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4be4fb0082
This is a 'yellow' Flogger migration CL. Yellow CLs should be mostly safe but include changes that are notable for one reason or another. Manual intervention may be required to address small issues. The comments in this CL indicate cases where suggested code changes should be double checked, or even modified. There may even be cases where files outside this CL are affected by changes to things such as logger visibility. However if a change does not have an associated comment then it should be safe. For more information, see [] Base CL: 197826149 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=198097990
80 lines
3 KiB
Java
80 lines
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 google.registry.model.ofy.ObjectifyService.ofy;
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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.google.common.flogger.FluentLogger;
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import com.googlecode.objectify.Key;
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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 java.util.NoSuchElementException;
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/** Reader that maps over {@link EppResourceIndex} and returns resources. */
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class EppResourceEntityReader<R extends EppResource> extends EppResourceBaseReader<R> {
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private static final FluentLogger logger = FluentLogger.forEnclosingClass();
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private static final long serialVersionUID = -8042933349899971801L;
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/**
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* The resource classes to postfilter for.
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*
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* <p>This can be {@link EppResource} or any descendant classes, regardless of whether those
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* classes map directly to a kind in Datastore, with the restriction that none of the classes
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* is a supertype of any of the others.
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*/
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private final ImmutableSet<Class<? extends R>> resourceClasses;
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public EppResourceEntityReader(
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Key<EppResourceIndexBucket> bucketKey,
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ImmutableSet<Class<? extends R>> resourceClasses) {
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super(
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bucketKey,
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ONE_MB * 2, // Estimate 2MB of memory for this reader, since it loads a (max 1MB) entity.
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varargsToKinds(resourceClasses));
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this.resourceClasses = resourceClasses;
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}
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/**
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* Called for each map invocation.
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*
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* @throws NoSuchElementException if there are no more elements, as specified in the
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* {@link InputReader#next} Javadoc.
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*/
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@Override
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public R next() throws NoSuchElementException {
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// Loop until we find a value, or nextQueryResult() throws a NoSuchElementException.
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while (true) {
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Key<? extends EppResource> key = nextQueryResult().getKey();
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EppResource resource = ofy().load().key(key).now();
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if (resource == null) {
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logger.atSevere().log("EppResourceIndex key %s points at a missing resource", key);
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continue;
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}
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// Postfilter to distinguish polymorphic types (e.g. DomainBase and DomainResource).
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for (Class<? extends R> resourceClass : resourceClasses) {
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if (resourceClass.isAssignableFrom(resource.getClass())) {
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@SuppressWarnings("unchecked")
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R r = (R) resource;
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return r;
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}
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}
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}
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}
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}
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