http://d.hatena.ne.jp/taedium/20100314/p2 を読んで。自分だったらどうかくかなーと思って。こんな感じかな。のメモ。

Consumer.java

Integer result = tx(new UnitWork<Integer>() {
    @Override
    public Integer run() {
      Employee employee = dao.selectById(1);
      employee.setName("hoge");
      employee.setJobType(JobType.PRESIDENT);
      return dao.update(employee);
    }
  });

TxHandler.java

public class TxHandler {

  public interface UnitWork<S> {
    S run();
  }

  public static <T> T tx(UnitWork<T> unitWork) {
    LocalTransaction tx = AppConfig.getLocalTransaction();
    try{
      tx.begin();
      T result = unitWork.run();
      tx.commit();
      return result;
    } finally {
      tx.rollback();
    }
  }
}