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5012893c1d
This change renames directories in preparation for the great package rename. The repository is now in a broken state because the code itself hasn't been updated. However this should ensure that git correctly preserves history for each file.
66 lines
2.8 KiB
Java
66 lines
2.8 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 com.google.domain.registry.model.index;
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import com.google.common.collect.ImmutableList;
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import com.google.common.hash.Hashing;
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import com.google.domain.registry.config.RegistryEnvironment;
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import com.google.domain.registry.model.EppResource;
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import com.google.domain.registry.model.ImmutableObject;
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import com.google.domain.registry.model.annotations.VirtualEntity;
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import com.googlecode.objectify.Key;
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import com.googlecode.objectify.annotation.Entity;
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import com.googlecode.objectify.annotation.Id;
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/** A virtual entity to represent buckets to which EppResourceIndex objects are randomly added. */
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@Entity
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@VirtualEntity
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public class EppResourceIndexBucket extends ImmutableObject {
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@Id
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private long bucketId;
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/**
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* Deterministic function that returns a bucket id based on the resource's roid.
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* NB: At the moment, nothing depends on this being deterministic, so we have the ability to
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* change the number of buckets and utilize a random distribution once we do.
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*/
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private static long getBucketIdFromEppResource(Key<? extends EppResource> resourceKey) {
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int numBuckets = RegistryEnvironment.get().config().getEppResourceIndexBucketCount();
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// IDs can't be 0, so add 1 to the hash.
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return Hashing.consistentHash(resourceKey.getName().hashCode(), numBuckets) + 1;
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}
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/** Gets a bucket key as a function of an EppResource to be indexed. */
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public static Key<EppResourceIndexBucket> getBucketKey(Key<? extends EppResource> resourceKey) {
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return Key.create(EppResourceIndexBucket.class, getBucketIdFromEppResource(resourceKey));
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}
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/** Gets the specified numbered bucket key. */
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public static Key<EppResourceIndexBucket> getBucketKey(int bucketId) {
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return Key.create(EppResourceIndexBucket.class, bucketId);
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}
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/** Returns the keys to all buckets. */
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public static Iterable<Key<EppResourceIndexBucket>> getAllBuckets() {
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ImmutableList.Builder<Key<EppResourceIndexBucket>> builder = new ImmutableList.Builder<>();
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int numBuckets = RegistryEnvironment.get().config().getEppResourceIndexBucketCount();
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for (int bucketId = 1; bucketId <= numBuckets; bucketId++) {
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builder.add(getBucketKey(bucketId));
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}
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return builder.build();
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}
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}
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