Method acquire

src/sessions.ts:1106–1130

* Acquire a Server Session from the pool. * Iterates through each session in the pool, removing any stale sessions * along the way. The first non-stale session found is removed from the * pool and returned. If no non-stale session is found, a new ServerSession is created.

()

   * pool and returned. If no non-stale session is found, a new ServerSession is created.
   */
  acquire(): ServerSession {
    const sessionTimeoutMinutes = this.client.topology?.logicalSessionTimeoutMinutes ?? 10;

    let session: ServerSession | null = null;

    // Try to obtain from session pool
    while (this.sessions.length > 0) {
      const potentialSession = this.sessions.shift();
      if (
        potentialSession != null &&
        (!!this.client.topology?.loadBalanced ||
          !potentialSession.hasTimedOut(sessionTimeoutMinutes))
      ) {
        session = potentialSession;
        break;
      }
    }

    // If nothing valid came from the pool make a new one
    if (session == null) {
      session = new ServerSession();
    }

    return session;
  }

  /**
   * Release a session to the session pool