log.info("Set maximum pool size to {}", size);
    }

    /**
     * Set the maximum idle time for connections
     * @param millis the maximum idle time in milliseconds
     */
    public void setMaxIdleTime(int millis) {
        if (millis <= 0) {
            throw new IllegalArgumentException("Idle time must be positive");
        }
        this.maxIdleTime = millis;