I am trying to learn GAE by writing simple java programs. This is the
coding I use to try JPA:
EntityManager em = null;
try {
em = EMF.get().createEntityManager();
int i = 6;
Trade5min t5 = new Trade5min();
t5.setStkCode(i);
t5.settDate("2010-07-15");
t5.setTradeRec("this is trec of "+i);
em.persist(t5);
} finally {
em.close();
resp.getWriter().println("TestWrite done");
}
It works. I can see the persisted records in datastore, and showed
"TestWrite done" on the browser.
However, if I add a second persist:
EntityManager em = null;
try {
em = EMF.get().createEntityManager();
int i = 6;
Trade5min t5 = new Trade5min();
t5.setStkCode(i);
t5.settDate("2010-07-15");
t5.setTradeRec("this is trec of "+i);
em.persist(t5);
i++;
t5 = new Trade5min();
t5.setStkCode(i);
t5.settDate("2010-07-15");
t5.setTradeRec("this is trec of "+i);
em.persist(t5);
} finally {
em.close();
resp.getWriter().println("TestWrite done");
}
It gives out warning:
handleAbandonedTxns: Request completed without committing or rolling
back
and then PersistenceException: Illegal argument at "em.close()".
Anybody know what's wrong with my coding?
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