public MatchService
{
   private IBatchDAO mBatchDAO
   private IMatchRecordDAO mMatchRecordDAO

   private Batch getNextBatchForProcessing()
   {
       Batch batch = mBatchDAO.getNextBatch();
       if( batch != null )
       {
           batch.setStatus( Batch.STATUS_PROCESSING );
           mBatchDAO.storeBatch( batch );
        }

        return batch;
   }

   private void processBatch( Batch batch )
   {
      MatchTrx trx = new MatchTrx( mBatchDAO, mMatchRecordDAO );
      trx.processBatch( batch );

      batch.setStatus( Batch.STATUS_COMPLETE );
      mBatchDAO.storeBatch( batch );
   }
}

public MatchTrx
{
   private IBatchDAO mBatchDAO;
   private IMatchRecordDAO mMatchRecordDAO;

   public MatchTrx( IBatchDAO batchDAO, IMatchRecordDAO matchDAO )
   {
      mBatchDAO := batchDAO;
      mMatchRecordDAO := matchDAO;
   }

   public void processBatch( Batch batch )
   {
       MatchRecord rec = mMatchRecordDAO.getMatchRecord( batch.getRecordID();
      rec.updateFromBatch( batch );
      mMatchRecordDAO.deleteOldStuff( rec );
      //... code here creates new stuff ...
      mMatchRecordDAO.storeNewStuff( rec );
   }
}