mv com/google/domain/registry google/registry

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.

java/google/registry/export/ExportSnapshotServlet.java

@@ -0,0 +1,92 @@
+// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.domain.registry.export;
+
+import static com.google.common.base.MoreObjects.firstNonNull;
+import static com.google.common.html.HtmlEscapers.htmlEscaper;
+import static javax.servlet.http.HttpServletResponse.SC_BAD_REQUEST;
+import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
+import static javax.servlet.http.HttpServletResponse.SC_OK;
+
+import com.google.common.net.MediaType;
+import com.google.domain.registry.config.RegistryEnvironment;
+import com.google.domain.registry.util.Clock;
+import com.google.domain.registry.util.FormattingLogger;
+import com.google.domain.registry.util.NonFinalForTesting;
+import com.google.domain.registry.util.SystemClock;
+
+import java.io.IOException;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * Trigger a backup-as-a-service job that writes a snapshot to Google Cloud Storage.
+ *
+ * <p>This is the first step of a four step workflow for exporting snapshots, with each step calling
+ * the next upon successful completion:<ol>
+ *   <li>The snapshot is exported to Google Cloud Storage (this servlet).
+ *   <li>The {@link CheckSnapshotServlet} polls until the export is completed.
+ *   <li>The {@link LoadSnapshotAction} imports the data from GCS to BigQuery.
+ *   <li>The {@link UpdateSnapshotViewAction} updates the view in latest_snapshot.
+ * </ol>
+ */
+public class ExportSnapshotServlet extends HttpServlet {
+
+  private static final RegistryEnvironment ENVIRONMENT = RegistryEnvironment.get();
+
+  /** Queue to use for enqueuing the task that will actually launch the backup. */
+  static final String QUEUE = "export-snapshot";  // See queue.xml.
+
+  /** Prefix to use for naming all snapshots that are started by this servlet. */
+  static final String SNAPSHOT_PREFIX = "auto_snapshot_";
+
+  private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
+
+  @NonFinalForTesting
+  private static Clock clock = new SystemClock();
+
+  @NonFinalForTesting
+  private static DatastoreBackupService backupService = DatastoreBackupService.get();
+
+  @NonFinalForTesting
+  private static CheckSnapshotServlet checkSnapshotServlet = new CheckSnapshotServlet();
+
+  @Override
+  public void doPost(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
+    try {
+      // Use a unique name for the snapshot so we can explicitly check its completion later.
+      String snapshotName = SNAPSHOT_PREFIX + clock.nowUtc().toString("YYYYMMdd_HHmmss");
+      backupService.launchNewBackup(
+          QUEUE,
+          snapshotName,
+          ENVIRONMENT.config().getSnapshotsBucket(),
+          ExportConstants.getBackupKinds());
+      // Enqueue a poll task to monitor the backup and load reporting-related kinds into bigquery.
+      checkSnapshotServlet.enqueuePollTask(snapshotName, ExportConstants.getReportingKinds());
+      String message = "Datastore backup started with name: " + snapshotName;
+      logger.info(message);
+      rsp.setStatus(SC_OK);
+      rsp.setContentType(MediaType.PLAIN_TEXT_UTF_8.toString());
+      rsp.getWriter().write("OK\n\n" + message);
+    } catch (Throwable e) {
+      logger.severe(e, e.toString());
+      rsp.sendError(
+          e instanceof IllegalArgumentException ? SC_BAD_REQUEST : SC_INTERNAL_SERVER_ERROR,
+          htmlEscaper().escape(firstNonNull(e.getMessage(), e.toString())));
+    }
+  }
+}