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/backup/CommitLogCheckpointAction.java

@@ -0,0 +1,86 @@
+// 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.backup;
+
+import static com.google.appengine.api.taskqueue.QueueFactory.getQueue;
+import static com.google.appengine.api.taskqueue.TaskOptions.Builder.withUrl;
+import static com.google.domain.registry.backup.ExportCommitLogDiffAction.LOWER_CHECKPOINT_TIME_PARAM;
+import static com.google.domain.registry.backup.ExportCommitLogDiffAction.UPPER_CHECKPOINT_TIME_PARAM;
+import static com.google.domain.registry.model.ofy.ObjectifyService.ofy;
+import static com.google.domain.registry.util.DateTimeUtils.isBeforeOrAt;
+import static com.google.domain.registry.util.FormattingLogger.getLoggerForCallerClass;
+
+import com.google.domain.registry.model.ofy.CommitLogCheckpoint;
+import com.google.domain.registry.model.ofy.CommitLogCheckpointRoot;
+import com.google.domain.registry.request.Action;
+import com.google.domain.registry.util.Clock;
+import com.google.domain.registry.util.FormattingLogger;
+import com.google.domain.registry.util.TaskEnqueuer;
+
+import com.googlecode.objectify.VoidWork;
+
+import org.joda.time.DateTime;
+
+import javax.inject.Inject;
+
+/**
+ * Action that saves commit log checkpoints to datastore and kicks off a diff export task.
+ *
+ * <p>We separate computing and saving the checkpoint from exporting it because the export to GCS
+ * is retryable but should not require the computation of a new checkpoint. Saving the checkpoint
+ * and enqueuing the export task are done transactionally, so any checkpoint that is saved will be
+ * exported to GCS very soon.
+ *
+ * <p>This action's supported method is GET rather than POST because it gets invoked via cron.
+ */
+@Action(
+    path = "/_dr/cron/commitLogCheckpoint",
+    method = Action.Method.GET,
+    automaticallyPrintOk = true)
+public final class CommitLogCheckpointAction implements Runnable {
+
+  private static final FormattingLogger logger = getLoggerForCallerClass();
+
+  private static final String QUEUE_NAME = "export-commits";
+
+  @Inject Clock clock;
+  @Inject CommitLogCheckpointStrategy strategy;
+  @Inject TaskEnqueuer taskEnqueuer;
+  @Inject CommitLogCheckpointAction() {}
+
+  @Override
+  public void run() {
+    final CommitLogCheckpoint checkpoint = strategy.computeCheckpoint();
+    logger.info("Generated candidate checkpoint for time " + checkpoint.getCheckpointTime());
+    ofy().transact(new VoidWork() {
+      @Override
+      public void vrun() {
+        DateTime lastWrittenTime = CommitLogCheckpointRoot.loadRoot().getLastWrittenTime();
+        if (isBeforeOrAt(checkpoint.getCheckpointTime(), lastWrittenTime)) {
+          logger.info("Newer checkpoint already written at time: " + lastWrittenTime);
+          return;
+        }
+        ofy().saveWithoutBackup().entities(
+            checkpoint,
+            CommitLogCheckpointRoot.create(checkpoint.getCheckpointTime()));
+        // Enqueue a diff task between previous and current checkpoints.
+        taskEnqueuer.enqueue(
+            getQueue(QUEUE_NAME),
+            withUrl(ExportCommitLogDiffAction.PATH)
+                .param(LOWER_CHECKPOINT_TIME_PARAM, lastWrittenTime.toString())
+                .param(UPPER_CHECKPOINT_TIME_PARAM, checkpoint.getCheckpointTime().toString()));
+      }});
+  }
+}