valery-barysok / multiverse Goto Github PK

import org.multiverse.api.references.*;
import static org.multiverse.api.StmUtils.*;

public class Account{
    private final TxnRef<Date> lastModified = new TxnRef();
    private final TxnLong amount = new TxnLong();

    public Account(long amount){
       this.amount.set(amount);
       this.lastModified.set(new Date());
    }

    public Date getLastModifiedDate(){
        return lastModified.get();
    }

    public long getAmount(){
        return amount.get();
    }

    public static void transfer(final Account from, final Account to, final long amount){
        atomic(new Runnable()){
            public void run(){
                Date date = new Date();

                from.lastModified.set(date);
                from.amount.dec(amount);

                to.lastModified.set(date);
                to.amount.inc(amount);
            }
        }
    }
}

# And it can be called like this:

Account account1 = new Account(10);
Account account2 = new Account(20)
Account.transfer(account1, account2, 5);