/**
* Run two transactions to populate and print the database. A TransactionRunner is used to ensure
* consistent handling of transactions, including deadlock retries. But the best transaction
* handling mechanism to use depends on the application.
*/
private void run() throws Exception {
TransactionRunner runner = new TransactionRunner(db.getEnvironment());
runner.run(new PopulateDatabase());
runner.run(new PrintDatabase());
}
/** Close the database cleanly. */
private void close() throws DatabaseException {
db.close();
}