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99 lines
4.3 KiB
Java
99 lines
4.3 KiB
Java
// Copyright 2016 The Domain Registry 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.base.Preconditions.checkArgument;
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import static com.google.common.base.Predicates.not;
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import static com.google.common.collect.Iterables.all;
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import static com.google.common.collect.Lists.asList;
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import static google.registry.util.TypeUtils.hasAnnotation;
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import com.google.appengine.tools.mapreduce.Input;
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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.annotation.EntitySubclass;
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import google.registry.model.EppResource;
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import google.registry.model.ImmutableObject;
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import google.registry.model.index.EppResourceIndex;
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/**
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* Mapreduce helpers for {@link EppResource} keys and objects.
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*
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* <p>The inputs provided by this class are not deletion-aware and do not project the resources
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* forward in time. That is the responsibility of mappers that use these inputs.
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*/
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public final class EppResourceInputs {
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private EppResourceInputs() {}
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/** Returns a MapReduce {@link Input} that loads all {@link EppResourceIndex} objects. */
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public static <R extends EppResource> Input<EppResourceIndex> createIndexInput() {
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return new EppResourceIndexInput();
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}
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/**
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* Returns a MapReduce {@link Input} that loads all {@link EppResource} objects of a given type,
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* including deleted resources.
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*
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* <p>Note: Do not concatenate multiple EntityInputs together (this is inefficient as it iterates
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* through all buckets multiple times). Specify the types in a single input, or load all types by
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* specifying {@link EppResource} as the class.
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*/
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@SafeVarargs
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public static <R extends EppResource> Input<R> createEntityInput(
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Class<? extends R> resourceClass,
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Class<? extends R>... moreResourceClasses) {
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return new EppResourceEntityInput<R>(
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ImmutableSet.copyOf(asList(resourceClass, moreResourceClasses)));
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}
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/**
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* Returns a MapReduce {@link Input} that loads all {@link ImmutableObject} objects of a given
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* type, including deleted resources, that are child entities of all {@link EppResource} objects
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* of a given type.
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*
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* <p>Note: Do not concatenate multiple EntityInputs together (this is inefficient as it iterates
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* through all buckets multiple times). Specify the types in a single input, or load all types by
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* specifying {@link EppResource} and/or {@link ImmutableObject} as the class.
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*/
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public static <R extends EppResource, I extends ImmutableObject> Input<I> createChildEntityInput(
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ImmutableSet<Class<? extends R>> parentClasses,
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ImmutableSet<Class<? extends I>> childClasses) {
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checkArgument(!parentClasses.isEmpty(), "Must provide at least one parent type.");
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checkArgument(!childClasses.isEmpty(), "Must provide at least one child type.");
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return new ChildEntityInput<>(parentClasses, childClasses);
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}
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/**
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* Returns a MapReduce {@link Input} that loads keys to all {@link EppResource} objects of a given
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* type, including deleted resources.
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*
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* <p>Note: Do not concatenate multiple KeyInputs together (this is inefficient as it iterates
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* through all buckets multiple times). Specify the types in a single input, or load all types by
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* specifying {@link EppResource} as the class.
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*/
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@SafeVarargs
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public static <R extends EppResource> Input<Key<R>> createKeyInput(
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Class<? extends R> resourceClass,
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Class<? extends R>... moreResourceClasses) {
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ImmutableSet<Class<? extends R>> resourceClasses =
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ImmutableSet.copyOf(asList(resourceClass, moreResourceClasses));
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checkArgument(
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all(resourceClasses, not(hasAnnotation(EntitySubclass.class))),
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"Mapping over keys requires a non-polymorphic Entity");
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return new EppResourceKeyInput<>(resourceClasses);
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}
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}
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