Class MySQL2Plugin

src/plugins/MySQL2Plugin.ts:30–133

import * as path from 'path';

class MySQL2Plugin implements SwPlugin {
  readonly module = 'mysql2';
  readonly versions = '*';

  getVersion(installer: PluginInstaller): string {
    // TODO: this method will not work in a bundle
    try {
      let indexPath = installer.resolve(this.module);
      let packageJsonStr = fs.readFileSync(`${path.dirname(indexPath)}${path.sep}package.json`, { encoding: 'utf-8' });
      const pkg = JSON.parse(packageJsonStr);
      return pkg.version;
    } catch {
      return '';
    }
  }

  install(installer: PluginInstaller): void {
    const Connection = (installer.require?.('mysql2') ?? require('mysql2')).Connection;
    const _query = Connection.prototype.query;

    Connection.prototype.query = function (sql: any, values: any, cb: any) {
      let query: any;

      const host = `${this.config.host}:${this.config.port}`;
      const span = ContextManager.current.newExitSpan('mysql/query', Component.MYSQL);

      span.start();

      try {
        span.component = Component.MYSQL;
        span.layer = SpanLayer.DATABASE;
        span.peer = host;

        span.tag(Tag.dbType('Mysql'));
        span.tag(Tag.dbInstance(`${this.config.database}`));

        let _sql: any;
        let _values: any;
        let streaming: any;

        if (typeof sql === 'function') {
          sql = wrapCallback(span, sql, 0);
        } else if (typeof sql === 'object') {
          _sql = sql.sql;

          if (typeof values === 'function') {
            values = wrapCallback(span, values, 0);
            _values = sql.values;
          } else if (values !== undefined) {
            _values = values;

            if (typeof cb === 'function') {
              cb = wrapCallback(span, cb, 0);
            } else {
              streaming = true;
            }
          } else {
            streaming = true;