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@@ -1,193 +0,0 @@
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-//TODO: удалить модуль в 2023г
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-const sqlite3 = require('sqlite3');
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-const sqlite = require('sqlite');
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-
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-const SQL = require('sql-template-strings');
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-
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-class SqliteConnectionPool {
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- constructor() {
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- this.closed = true;
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- }
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-
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- async open(poolConfig, dbFileName) {
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- const connCount = poolConfig.connCount || 1;
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- const busyTimeout = poolConfig.busyTimeout || 60*1000;
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- const cacheSize = poolConfig.cacheSize || 2000;
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-
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- this.dbFileName = dbFileName;
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- this.connections = [];
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- this.freed = new Set();
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- this.waitingQueue = [];
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-
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- for (let i = 0; i < connCount; i++) {
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- let client = await sqlite.open({
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- filename: dbFileName,
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- driver: sqlite3.Database
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- });
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-
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- client.configure('busyTimeout', busyTimeout); //ms
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- await client.exec(`PRAGMA cache_size = ${cacheSize}`);
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-
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- client.ret = () => {
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- this.freed.add(i);
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- if (this.waitingQueue.length) {
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- this.waitingQueue.shift().onFreed(i);
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- }
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- };
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-
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- this.freed.add(i);
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- this.connections[i] = client;
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- }
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- this.closed = false;
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- }
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-
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- get() {
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- return new Promise((resolve) => {
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- if (this.closed)
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- throw new Error('Connection pool closed');
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-
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- const freeConnIndex = this.freed.values().next().value;
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- if (freeConnIndex !== undefined) {
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- this.freed.delete(freeConnIndex);
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- resolve(this.connections[freeConnIndex]);
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- return;
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- }
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-
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- this.waitingQueue.push({
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- onFreed: (connIndex) => {
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- this.freed.delete(connIndex);
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- resolve(this.connections[connIndex]);
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- },
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- });
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- });
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- }
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-
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- async run(query) {
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- const dbh = await this.get();
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- try {
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- let result = await dbh.run(query);
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- dbh.ret();
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- return result;
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- } catch (e) {
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- dbh.ret();
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- throw e;
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- }
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- }
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-
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- async all(query) {
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- const dbh = await this.get();
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- try {
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- let result = await dbh.all(query);
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- dbh.ret();
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- return result;
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- } catch (e) {
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- dbh.ret();
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- throw e;
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- }
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- }
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-
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- async exec(query) {
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- const dbh = await this.get();
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- try {
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- let result = await dbh.exec(query);
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- dbh.ret();
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- return result;
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- } catch (e) {
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- dbh.ret();
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- throw e;
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- }
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- }
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-
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- async close() {
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- for (let i = 0; i < this.connections.length; i++) {
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- await this.connections[i].close();
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- }
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- this.closed = true;
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- }
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-
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- // Modified from node-sqlite/.../src/Database.js
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- async migrate(migs, table, force) {
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- const migrations = migs.sort((a, b) => Math.sign(a.id - b.id));
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-
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- if (!migrations.length) {
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- throw new Error('No migration data');
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- }
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-
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- migrations.map(migration => {
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- const data = migration.data;
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- const [up, down] = data.split(/^--\s+?down\b/mi);
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- if (!down) {
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- const message = `The ${migration.filename} file does not contain '-- Down' separator.`;
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- throw new Error(message);
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- } else {
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- /* eslint-disable no-param-reassign */
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- migration.up = up.replace(/^-- .*?$/gm, '').trim();// Remove comments
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- migration.down = down.trim(); // and trim whitespaces
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- }
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- });
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-
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- // Create a database table for migrations meta data if it doesn't exist
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- await this.run(`CREATE TABLE IF NOT EXISTS "${table}" (
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- id INTEGER PRIMARY KEY,
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- name TEXT NOT NULL,
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- up TEXT NOT NULL,
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- down TEXT NOT NULL
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-)`);
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-
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- // Get the list of already applied migrations
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- let dbMigrations = await this.all(
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- `SELECT id, name, up, down FROM "${table}" ORDER BY id ASC`,
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- );
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-
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- // Undo migrations that exist only in the database but not in migs,
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- // also undo the last migration if the `force` option was set to `last`.
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- const lastMigration = migrations[migrations.length - 1];
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- for (const migration of dbMigrations.slice().sort((a, b) => Math.sign(b.id - a.id))) {
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- if (!migrations.some(x => x.id === migration.id) ||
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- (force === 'last' && migration.id === lastMigration.id)) {
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- const dbh = await this.get();
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- await dbh.run('BEGIN');
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- try {
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- await dbh.exec(migration.down);
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- await dbh.run(SQL`DELETE FROM "`.append(table).append(SQL`" WHERE id = ${migration.id}`));
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- await dbh.run('COMMIT');
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- dbMigrations = dbMigrations.filter(x => x.id !== migration.id);
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- } catch (err) {
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- await dbh.run('ROLLBACK');
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- throw err;
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- } finally {
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- dbh.ret();
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- }
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- } else {
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- break;
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- }
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- }
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-
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- // Apply pending migrations
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- let applied = [];
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- const lastMigrationId = dbMigrations.length ? dbMigrations[dbMigrations.length - 1].id : 0;
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- for (const migration of migrations) {
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- if (migration.id > lastMigrationId) {
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- const dbh = await this.get();
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- await dbh.run('BEGIN');
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- try {
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- await dbh.exec(migration.up);
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- await dbh.run(SQL`INSERT INTO "`.append(table).append(
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- SQL`" (id, name, up, down) VALUES (${migration.id}, ${migration.name}, ${migration.up}, ${migration.down})`)
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- );
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- await dbh.run('COMMIT');
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- applied.push(migration.id);
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- } catch (err) {
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- await dbh.run('ROLLBACK');
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- throw err;
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- } finally {
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- dbh.ret();
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- }
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- }
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- }
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-
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- return applied;
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- }
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-}
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-
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-module.exports = SqliteConnectionPool;
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