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/model/ofy/CommitLogCheckpointRoot.java

@@ -0,0 +1,64 @@
+// 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.model.ofy;
+
+import static com.google.domain.registry.util.DateTimeUtils.START_OF_TIME;
+import static com.googlecode.objectify.ObjectifyService.ofy;
+
+import com.google.domain.registry.model.ImmutableObject;
+import com.google.domain.registry.model.annotations.NotBackedUp;
+import com.google.domain.registry.model.annotations.NotBackedUp.Reason;
+
+import com.googlecode.objectify.Key;
+import com.googlecode.objectify.annotation.Entity;
+import com.googlecode.objectify.annotation.Id;
+
+import org.joda.time.DateTime;
+
+/**
+ * Singleton parent entity for all commit log checkpoints.
+ */
+@Entity
+@NotBackedUp(reason = Reason.COMMIT_LOGS)
+public class CommitLogCheckpointRoot extends ImmutableObject {
+
+  public static final long SINGLETON_ID = 1;  // There is always exactly one of these.
+
+  @Id
+  long id = SINGLETON_ID;
+
+  /** Singleton key for CommitLogCheckpointParent. */
+  public static Key<CommitLogCheckpointRoot> getKey() {
+    return Key.create(CommitLogCheckpointRoot.class, SINGLETON_ID);
+  }
+
+  /** The timestamp of the last {@link CommitLogCheckpoint} written. */
+  DateTime lastWrittenTime = START_OF_TIME;
+
+  public DateTime getLastWrittenTime() {
+    return lastWrittenTime;
+  }
+
+  public static CommitLogCheckpointRoot loadRoot() {
+    CommitLogCheckpointRoot root = ofy().load().key(getKey()).now();
+    return root == null ? new CommitLogCheckpointRoot() : root;
+  }
+
+  public static CommitLogCheckpointRoot create(DateTime lastWrittenTime) {
+    CommitLogCheckpointRoot instance = new CommitLogCheckpointRoot();
+    instance.lastWrittenTime = lastWrittenTime;
+    return instance;
+  }
+}