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90 lines
3.9 KiB
Java
90 lines
3.9 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.export;
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import static com.google.common.base.MoreObjects.firstNonNull;
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import static com.google.common.html.HtmlEscapers.htmlEscaper;
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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.common.net.MediaType;
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import google.registry.config.RegistryEnvironment;
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import google.registry.util.Clock;
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import google.registry.util.FormattingLogger;
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import google.registry.util.NonFinalForTesting;
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import google.registry.util.SystemClock;
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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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/**
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* Trigger a backup-as-a-service job that writes a snapshot to Google Cloud Storage.
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*
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* <p>This is the first step of a four step workflow for exporting snapshots, with each step calling
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* the next upon successful completion:<ol>
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* <li>The snapshot is exported to Google Cloud Storage (this servlet).
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* <li>The {@link CheckSnapshotServlet} polls until the export is completed.
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* <li>The {@link LoadSnapshotAction} imports the data from GCS to BigQuery.
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* <li>The {@link UpdateSnapshotViewAction} updates the view in latest_snapshot.
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* </ol>
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*/
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public class ExportSnapshotServlet extends HttpServlet {
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private static final RegistryEnvironment ENVIRONMENT = RegistryEnvironment.get();
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/** Queue to use for enqueuing the task that will actually launch the backup. */
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static final String QUEUE = "export-snapshot"; // See queue.xml.
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/** Prefix to use for naming all snapshots that are started by this servlet. */
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static final String SNAPSHOT_PREFIX = "auto_snapshot_";
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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 DatastoreBackupService backupService = DatastoreBackupService.get();
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@NonFinalForTesting
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private static CheckSnapshotServlet checkSnapshotServlet = new CheckSnapshotServlet();
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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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// Use a unique name for the snapshot so we can explicitly check its completion later.
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String snapshotName = SNAPSHOT_PREFIX + clock.nowUtc().toString("YYYYMMdd_HHmmss");
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backupService.launchNewBackup(
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QUEUE,
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snapshotName,
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ENVIRONMENT.config().getSnapshotsBucket(),
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ExportConstants.getBackupKinds());
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// Enqueue a poll task to monitor the backup and load reporting-related kinds into bigquery.
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checkSnapshotServlet.enqueuePollTask(snapshotName, ExportConstants.getReportingKinds());
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String message = "Datastore backup started with name: " + snapshotName;
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logger.info(message);
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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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}
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