Add the schema and DAO for Locks in CloudSQL (#462)

* Add the schema and DAO for Locks in CloudSQL

* Addresses some comments

* Change number on flyway file

* Small changes

* More small changes

* Use checkArgumentNotNull instead of checkNotNull

* Address comments

* fix javadocs

* update persistence

db/src/main/resources/sql/flyway/V18__create_lock.sql

@@ -0,0 +1,22 @@
+ -- Copyright 2020 The Nomulus 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.
+
+ create table "Lock" (
+       resource_name text not null,
+        tld text not null,
+        acquired_time timestamptz not null,
+        expiration_time timestamptz not null,
+        request_log_id text not null,
+        primary key (resource_name, tld)
+    );

db/src/main/resources/sql/schema/db-schema.sql.generated

@@ -77,6 +77,15 @@
         primary key (id)
     );
 
+    create table "Lock" (
+       resource_name text not null,
+        tld text not null,
+        acquired_time timestamptz not null,
+        expiration_time timestamptz not null,
+        request_log_id text not null,
+        primary key (resource_name, tld)
+    );
+
     create table "PremiumEntry" (
        revision_id int8 not null,
         domain_label text not null,

db/src/main/resources/sql/schema/nomulus.golden.sql

@@ -116,6 +116,19 @@ CREATE TABLE public."Domain" (
 );
 
 
+--
+-- Name: Lock; Type: TABLE; Schema: public; Owner: -
+--
+
+CREATE TABLE public."Lock" (
+    resource_name text NOT NULL,
+    tld text NOT NULL,
+    acquired_time timestamp with time zone NOT NULL,
+    expiration_time timestamp with time zone NOT NULL,
+    request_log_id text NOT NULL
+);
+
+
 --
 -- Name: PremiumEntry; Type: TABLE; Schema: public; Owner: -
 --
@@ -374,6 +387,14 @@ ALTER TABLE ONLY public."Domain"
     ADD CONSTRAINT "Domain_pkey" PRIMARY KEY (repo_id);
 
 
+--
+-- Name: Lock Lock_pkey; Type: CONSTRAINT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY public."Lock"
+    ADD CONSTRAINT "Lock_pkey" PRIMARY KEY (resource_name, tld);
+
+
 --
 -- Name: PremiumEntry PremiumEntry_pkey; Type: CONSTRAINT; Schema: public; Owner: -
 --