Examples of org.apache.hadoop.zebra.tfile.TFile$Reader$Scanner

thread.concurrencyCookbook.chapter2.recipe05.Reader

The TFile Scanner. The Scanner has an implicit cursor, which, upon creation, points to the first key-value pair in the scan range. If the scan range is empty, the cursor will point to the end of the scan range.

Use {@link Scanner#atEnd()} to test whether the cursor is at the endlocation of the scanner.

Use {@link Scanner#advance()} to move the cursor to the next key-valuepair (or end if none exists). Use seekTo methods ( {@link Scanner#seekTo(byte[])} or{@link Scanner#seekTo(byte[],int,int)}) to seek to any arbitrary location in the covered range (including backward seeking). Use {@link Scanner#rewind()} to seek back to the beginning of the scanner.Use {@link Scanner#seekToEnd()} to seek to the end of the scanner.

Actual keys and values may be obtained through {@link Scanner.Entry}object, which is obtained through {@link Scanner#entry()}.

  public static void main(String[] args) {


    // Creates an object to store the prices
    PricesInfo pricesInfo=new PricesInfo();
    
    Reader readers[]=new Reader[5];
    Thread threadsReader[]=new Thread[5];
    
    // Creates five readers and threads to run them
    for (int i=0; i<5; i++){
      readers[i]=new Reader(pricesInfo);
      threadsReader[i]=new Thread(readers[i]);
    }
    
    // Creates a writer and a thread to run it
    Writer writer=new Writer(pricesInfo);

Examples of org.apache.hadoop.zebra.tfile.TFile$Reader$Scanner

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