move to a separate package instead and address comments

Signed-off-by: Fredrik Adelöw <freben@gmail.com>
2021-10-24 19:08:50 +02:00
parent 222793c849
commit e09bf604cd
25 changed files with 229 additions and 101 deletions
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2020 The Backstage Authors
+ *
+ * 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.
+ */
+
+// @ts-check
+
+/**
+ * @param {import('knex').Knex} knex
+ */
+exports.up = async function up(knex) {
+  //
+  // mutexes
+  //
+  await knex.schema.createTable('backstage_backend_tasks__mutexes', table => {
+    table.comment('Locks used for mutual exclusion among multiple workers');
+    table
+      .text('id')
+      .primary()
+      .notNullable()
+      .comment('The unique ID of this particular mutex');
+    table
+      .text('current_lock_ticket')
+      .notNullable()
+      .comment('A unique ticket for the current mutex lock');
+    table
+      .dateTime('current_lock_acquired_at')
+      .nullable()
+      .comment('The time when the mutex was locked');
+    table
+      .dateTime('current_lock_expires_at')
+      .nullable()
+      .comment('The time when a locked mutex will time out and auto-release');
+    table.index(['id'], 'backstage_backend_tasks__mutexes__id_idx');
+  });
+  //
+  // tasks
+  //
+  await knex.schema.createTable('backstage_backend_tasks__tasks', table => {
+    table.comment('Tasks used for scheduling work on multiple workers');
+    table
+      .text('id')
+      .primary()
+      .notNullable()
+      .comment('The unique ID of this particular task');
+    table
+      .text('settings_json')
+      .notNullable()
+      .comment('JSON serialized object with properties for this task');
+    table
+      .dateTime('next_run_start_at')
+      .nullable()
+      .comment('The next time that the task should be started');
+    table
+      .text('current_run_ticket')
+      .nullable()
+      .comment('A unique ticket for the current task run');
+    table
+      .dateTime('current_run_started_at')
+      .nullable()
+      .comment('The time that the current task run started');
+    table
+      .dateTime('current_run_expires_at')
+      .nullable()
+      .comment('The time that the current task run will time out');
+    table.index(['id'], 'backstage_backend_tasks__tasks__id_idx');
+  });
+};
+
+/**
+ * @param {import('knex').Knex} knex
+ */
+exports.down = async function down(knex) {
+  //
+  // tasks
+  //
+  await knex.schema.alterTable('backstage_backend_tasks__tasks', table => {
+    table.dropIndex([], 'backstage_backend_tasks__tasks__id_idx');
+  });
+  await knex.schema.dropTable('backstage_backend_tasks__tasks');
+  //
+  // locks
+  //
+  await knex.schema.alterTable('backstage_backend_tasks__task_locks', table => {
+    table.dropIndex([], 'backstage_backend_tasks__task_locks__id_idx');
+  });
+  await knex.schema.dropTable('backstage_backend_tasks__task_locks');
+};