Method shutdown

src/java/simpledb/storage/LogFile.java:503–511

Shutdown the logging system, writing out whatever state is necessary so that start up can happen quickly (without extensive recovery.)

()

        extensive recovery.)
    */
    public synchronized void shutdown() {
        try {
            logCheckpoint();  //simple way to shutdown is to write a checkpoint record
            raf.close();
        } catch (IOException e) {
            System.out.println("ERROR SHUTTING DOWN -- IGNORING.");
            e.printStackTrace();
        }
    }

    /** Recover the database system by ensuring that the updates of
        committed transactions are installed and that the