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106 lines
4.2 KiB
Java
106 lines
4.2 KiB
Java
// Copyright 2016 Google Inc. 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.tools.server;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.google.common.collect.Iterables.partition;
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import static com.google.common.collect.Lists.partition;
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import static com.google.domain.registry.model.ofy.ObjectifyService.ofy;
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import static com.google.domain.registry.request.Action.Method.POST;
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import static com.google.domain.registry.util.PipelineUtils.createJobPath;
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import com.google.appengine.tools.mapreduce.Input;
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import com.google.appengine.tools.mapreduce.Mapper;
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import com.google.appengine.tools.mapreduce.inputs.InMemoryInput;
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import com.google.common.collect.ImmutableList;
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import com.google.domain.registry.config.RegistryEnvironment;
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import com.google.domain.registry.mapreduce.MapreduceAction;
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import com.google.domain.registry.mapreduce.MapreduceRunner;
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import com.google.domain.registry.model.ofy.CommitLogBucket;
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import com.google.domain.registry.request.Action;
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import com.google.domain.registry.request.Response;
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import com.googlecode.objectify.Key;
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import com.googlecode.objectify.VoidWork;
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import java.util.List;
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import javax.inject.Inject;
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/**
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* Deletes all commit logs in datastore.
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*
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* <p>Before running this, use the datastore admin page to delete all {@code CommitLogManifest} and
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* {@code CommitLogMutation} entities. That will take care of most (likely all) commit log entities
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* (except perhaps for very recently created entities that are missed by the eventually consistent
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* query driving that deletion) and it will be much faster than this mapreduce. After that, run this
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* to get a guarantee that everything was deleted.
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*/
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@Action(path = "/_dr/task/killAllCommitLogs", method = POST)
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public class KillAllCommitLogsAction implements MapreduceAction {
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private static final int BATCH_SIZE = 100;
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@Inject MapreduceRunner mrRunner;
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@Inject Response response;
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@Inject KillAllCommitLogsAction() {}
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@Override
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public void run() {
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checkArgument( // safety
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RegistryEnvironment.get() == RegistryEnvironment.ALPHA
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|| RegistryEnvironment.get() == RegistryEnvironment.UNITTEST,
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"DO NOT RUN ANYWHERE ELSE EXCEPT ALPHA OR TESTS.");
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// Create a in-memory input, assigning each bucket to its own shard for maximum parallelization.
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Input<Key<CommitLogBucket>> input =
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new InMemoryInput<>(partition(CommitLogBucket.getAllBucketKeys().asList(), 1));
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response.sendJavaScriptRedirect(createJobPath(mrRunner
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.setJobName("Delete all commit logs")
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.setModuleName("tools")
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.runMapOnly(new KillAllCommitLogsMapper(), ImmutableList.of(input))));
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}
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/**
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* Mapper to delete a {@link CommitLogBucket} and any commit logs in the bucket.
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*
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* <p>This will delete:
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* <ul>
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* <li>{@link CommitLogBucket}
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* <li>{@code CommitLogManifest}
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* <li>{@code CommitLogMutation}
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* </ul>
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*/
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static class KillAllCommitLogsMapper extends Mapper<Key<CommitLogBucket>, Void, Void> {
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private static final long serialVersionUID = 1504266335352952033L;
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@Override
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public void map(Key<CommitLogBucket> bucket) {
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// The query on the bucket could time out, but we are not worried about that because of the
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// procedure outlined above.
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for (final List<Key<Object>> batch
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: partition(ofy().load().ancestor(bucket).keys(), BATCH_SIZE)) {
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ofy().transact(new VoidWork() {
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@Override
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public void vrun() {
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ofy().deleteWithoutBackup().entities(batch);
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}});
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getContext().incrementCounter("deleted entities", batch.size());
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}
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getContext().incrementCounter("completed buckets");
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}
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}
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}
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