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Import code from internal repository to git
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Justine Tunney
commit
0ef0c933d2
2490 changed files with 281594 additions and 0 deletions
207
java/com/google/domain/registry/export/LoadSnapshotServlet.java
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207
java/com/google/domain/registry/export/LoadSnapshotServlet.java
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// 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.export;
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import static com.google.common.base.MoreObjects.firstNonNull;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.google.common.html.HtmlEscapers.htmlEscaper;
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import static com.google.domain.registry.util.HttpServletUtils.getRequiredParameterValue;
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import static javax.servlet.http.HttpServletResponse.SC_BAD_REQUEST;
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import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
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import static javax.servlet.http.HttpServletResponse.SC_OK;
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import com.google.api.client.extensions.appengine.http.UrlFetchTransport;
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import com.google.api.client.googleapis.extensions.appengine.auth.oauth2.AppIdentityCredential;
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import com.google.api.client.json.jackson2.JacksonFactory;
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import com.google.api.services.bigquery.Bigquery;
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import com.google.api.services.bigquery.BigqueryScopes;
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import com.google.api.services.bigquery.model.Dataset;
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import com.google.api.services.bigquery.model.DatasetReference;
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import com.google.api.services.bigquery.model.Job;
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import com.google.api.services.bigquery.model.JobConfiguration;
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import com.google.api.services.bigquery.model.JobConfigurationLoad;
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import com.google.api.services.bigquery.model.JobReference;
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import com.google.api.services.bigquery.model.TableReference;
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import com.google.appengine.api.taskqueue.QueueFactory;
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import com.google.appengine.api.taskqueue.TaskHandle;
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import com.google.appengine.api.taskqueue.TaskOptions;
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import com.google.appengine.api.taskqueue.TaskOptions.Method;
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import com.google.common.base.Joiner;
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import com.google.common.base.Splitter;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.ImmutableSet;
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import com.google.common.net.MediaType;
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import com.google.domain.registry.bigquery.BigqueryFactory;
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import com.google.domain.registry.bigquery.BigqueryJobFailureException;
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import com.google.domain.registry.bigquery.BigqueryUtils.SourceFormat;
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import com.google.domain.registry.bigquery.BigqueryUtils.WriteDisposition;
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import com.google.domain.registry.config.RegistryEnvironment;
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import com.google.domain.registry.export.BigqueryPollJobAction.BigqueryPollJobEnqueuer;
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import com.google.domain.registry.util.Clock;
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import com.google.domain.registry.util.FormattingLogger;
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import com.google.domain.registry.util.NonFinalForTesting;
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import com.google.domain.registry.util.Retrier;
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import com.google.domain.registry.util.SystemClock;
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import com.google.domain.registry.util.SystemSleeper;
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import com.google.domain.registry.util.TaskEnqueuer;
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import org.joda.time.DateTime;
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import java.io.IOException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/** Load a datastore snapshot from Google Cloud Storage into BigQuery. */
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public class LoadSnapshotServlet extends HttpServlet {
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private static final RegistryEnvironment ENVIRONMENT = RegistryEnvironment.get();
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/** Parameter names for passing parameters into the servlet. */
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static final String SNAPSHOT_ID_PARAM = "id";
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static final String SNAPSHOT_FILE_PARAM = "file";
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static final String SNAPSHOT_KINDS_PARAM = "kinds";
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/** Servlet-specific details needed for enqueuing tasks against itself. */
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static final String QUEUE = "export-snapshot"; // See queue.xml.
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static final String PATH = "/_dr/task/loadSnapshot"; // See web.xml.
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private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
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@NonFinalForTesting
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private static Clock clock = new SystemClock();
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@NonFinalForTesting
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private static BigqueryFactory bigqueryFactory = new BigqueryFactory();
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@NonFinalForTesting
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private static BigqueryPollJobEnqueuer bigqueryPollEnqueuer = new BigqueryPollJobEnqueuer(
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new TaskEnqueuer(new Retrier(new SystemSleeper(), 5)));
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/** Enqueue a task for starting a backup load. Not static for better testability. */
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public TaskHandle enqueueLoadTask(
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String snapshotId, String gcsFile, ImmutableSet<String> kinds) {
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return QueueFactory.getQueue(QUEUE).add(
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TaskOptions.Builder.withUrl(PATH)
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.method(Method.POST)
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.param(SNAPSHOT_ID_PARAM, snapshotId)
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.param(SNAPSHOT_FILE_PARAM, gcsFile)
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.param(SNAPSHOT_KINDS_PARAM, Joiner.on(',').join(kinds)));
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}
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@Override
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public void doPost(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
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try {
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String snapshotId = getRequiredParameterValue(req, SNAPSHOT_ID_PARAM);
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String gcsFilename = getRequiredParameterValue(req, SNAPSHOT_FILE_PARAM);
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ImmutableList<String> kinds = ImmutableList.copyOf(
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Splitter.on(',').splitToList(getRequiredParameterValue(req, SNAPSHOT_KINDS_PARAM)));
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String message = loadSnapshot(snapshotId, gcsFilename, kinds);
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rsp.setStatus(SC_OK);
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rsp.setContentType(MediaType.PLAIN_TEXT_UTF_8.toString());
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rsp.getWriter().write("OK\n\n" + message);
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} catch (Throwable e) {
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logger.severe(e, e.toString());
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rsp.sendError(
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e instanceof IllegalArgumentException ? SC_BAD_REQUEST : SC_INTERNAL_SERVER_ERROR,
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htmlEscaper().escape(firstNonNull(e.getMessage(), e.toString())));
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}
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}
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private String loadSnapshot(String snapshotId, String gcsFilename, ImmutableList<String> kinds)
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throws IOException {
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Bigquery bigquery = bigqueryFactory.create(
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getClass().getSimpleName(),
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new UrlFetchTransport(),
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new JacksonFactory(),
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new AppIdentityCredential(BigqueryScopes.all()));
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String projectId = ENVIRONMENT.config().getProjectId();
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DateTime now = clock.nowUtc();
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ensureDataset(bigquery, projectId, ENVIRONMENT.config().getSnapshotsDataset());
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String loadMessage =
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String.format("Loading datastore snapshot %s from %s...", snapshotId, gcsFilename);
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logger.info(loadMessage);
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StringBuilder builder = new StringBuilder(loadMessage + "\n");
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builder.append("Load jobs:\n");
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for (String kindName : kinds) {
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String jobId = String.format("load-snapshot-%s-%s-%d", snapshotId, kindName, now.getMillis());
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JobReference jobRef = new JobReference().setProjectId(projectId).setJobId(jobId);
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String sourceUri = getBackupInfoFileForKind(gcsFilename, kindName);
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String tableId = String.format("%s_%s", snapshotId, kindName);
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// Launch the load job.
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Job job = makeLoadJob(jobRef, sourceUri, tableId);
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bigquery.jobs().insert(projectId, job).execute();
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// Enqueue a task to check on the load job's completion, and if it succeeds, to update a
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// well-known view in BigQuery to point at the newly loaded snapshot table for this kind.
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bigqueryPollEnqueuer.enqueuePollTask(
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jobRef,
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UpdateSnapshotViewServlet.createViewUpdateTask(
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ENVIRONMENT.config().getSnapshotsDataset(), tableId, kindName),
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QueueFactory.getQueue(UpdateSnapshotViewServlet.QUEUE));
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builder.append(String.format(" - %s:%s\n", projectId, jobId));
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logger.infofmt("Submitted load job %s:%s", projectId, jobId);
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}
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return builder.toString();
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}
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private static void ensureDataset(Bigquery bigquery, String projectId, String datasetId)
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throws IOException {
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try {
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bigquery.datasets()
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.insert(projectId,
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new Dataset().setDatasetReference(
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new DatasetReference()
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.setProjectId(projectId)
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.setDatasetId(datasetId)))
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.execute();
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} catch (IOException e) {
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// Swallow errors about a duplicate dataset, and throw any other ones.
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if (!BigqueryJobFailureException.create(e).getReason().equals("duplicate")) {
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throw e;
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}
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}
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}
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private static String getBackupInfoFileForKind(String backupInfoFile, String kindName) {
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String extension = ".backup_info";
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checkArgument(backupInfoFile.endsWith(extension), "backup info file extension missing");
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String prefix = backupInfoFile.substring(0, backupInfoFile.length() - extension.length());
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return Joiner.on('.').join(prefix, kindName, extension.substring(1));
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}
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private static Job makeLoadJob(JobReference jobRef, String sourceUri, String tableId) {
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TableReference tableReference = new TableReference()
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.setProjectId(jobRef.getProjectId())
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.setDatasetId(ENVIRONMENT.config().getSnapshotsDataset())
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.setTableId(tableId);
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return new Job()
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.setJobReference(jobRef)
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.setConfiguration(new JobConfiguration()
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.setLoad(new JobConfigurationLoad()
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.setWriteDisposition(WriteDisposition.WRITE_EMPTY.toString())
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.setSourceFormat(SourceFormat.DATASTORE_BACKUP.toString())
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.setSourceUris(ImmutableList.of(sourceUri))
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.setDestinationTable(tableReference)));
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}
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}
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