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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
93 lines
3.9 KiB
Java
93 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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