Method preAppend

src/java/simpledb/storage/LogFile.java:129–139

()

    // DB wants to do recovery, we're sure now -- it didn't. So truncate
    // the log.
    void preAppend() throws IOException {
        totalRecords++;
        if(recoveryUndecided){
            recoveryUndecided = false;
            raf.seek(0);
            raf.setLength(0);
            raf.writeLong(NO_CHECKPOINT_ID);
            raf.seek(raf.length());
            currentOffset = raf.getFilePointer();
        }
    }

    public synchronized int getTotalRecords() {
        return totalRecords;