Initial commit - Event Planner application

node_modules/kysely/dist/cjs/dialect/mysql/mysql-adapter.js

@@ -0,0 +1,28 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.MysqlAdapter = void 0;
+const sql_js_1 = require("../../raw-builder/sql.js");
+const dialect_adapter_base_js_1 = require("../dialect-adapter-base.js");
+const LOCK_ID = 'ea586330-2c93-47c8-908d-981d9d270f9d';
+const LOCK_TIMEOUT_SECONDS = 60 * 60;
+class MysqlAdapter extends dialect_adapter_base_js_1.DialectAdapterBase {
+    get supportsTransactionalDdl() {
+        return false;
+    }
+    get supportsReturning() {
+        return false;
+    }
+    async acquireMigrationLock(db, _opt) {
+        // Kysely uses a single connection to run the migrations. Because of that, we
+        // can take a lock using `get_lock`. Locks acquired using `get_lock` get
+        // released when the connection is destroyed (session ends) or when the lock
+        // is released using `release_lock`. This way we know that the lock is either
+        // released by us after successfull or failed migrations OR it's released by
+        // MySQL if the process gets killed for some reason.
+        await (0, sql_js_1.sql) `select get_lock(${sql_js_1.sql.lit(LOCK_ID)}, ${sql_js_1.sql.lit(LOCK_TIMEOUT_SECONDS)})`.execute(db);
+    }
+    async releaseMigrationLock(db, _opt) {
+        await (0, sql_js_1.sql) `select release_lock(${sql_js_1.sql.lit(LOCK_ID)})`.execute(db);
+    }
+}
+exports.MysqlAdapter = MysqlAdapter;