TransactionState(final String ctx) {
this.startTime = System.currentTimeMillis();
this.txUuid = String.format("%s:%s", ctx, UUID.randomUUID().toString());
this.stopWatch = new StopWatch();
this.stopWatch.start();
this.owner = Logs.isExtrrreeeme() ? Threads.currentStackString() : "n/a";
try {
this.eventLog(TxStep.BEGIN, TxEvent.CREATE);
final EntityManagerFactory anemf =
(EntityManagerFactoryImpl) PersistenceContexts.getEntityManagerFactory(ctx);
checkParam(anemf, notNullValue());
this.em = anemf.createEntityManager();
checkParam(this.em, notNullValue());
this.transaction = this.em.getTransaction();
this.transaction.begin();
this.session = new WeakReference<Session>((Session) this.em.getDelegate());
this.eventLog(TxStep.END, TxEvent.CREATE);
} catch (final Throwable ex) {
Logs.exhaust().error(ex, ex);
this.eventLog(TxStep.FAIL, TxEvent.CREATE);
this.rollback();
throw new RuntimeException(PersistenceExceptions.throwFiltered(ex));
} finally {
outstanding.put(this.txUuid, this);
}
}
/**
*
*
* <table>
* <tbody>
* <tr valign="top">
* <th>Scenario</th>
* <th><tt>EntityManager.persist</tt></th>
* <th><tt>EntityManager.merge</tt></th>
* <th><tt>SessionManager.saveOrUpdate</tt></th>
* </tr>
* <tr valign="top">
* <th>Object passed was never persisted</th>
*
* <td>1. Object added to persistence context as new entity<br>
* 2. New entity inserted into database at flush/commit</td>
* <td>1. State copied to new entity.<br>
* 2. New entity added to persistence context<br>
* 3. New entity inserted into database at flush/commit<br>
* 4. New entity returned</td>
* <td>1. Object added to persistence context as new entity<br>
* 2. New entity inserted into database at flush/commit</td>
* </tr>
* <tr valign="top">
* <th>Object was previously persisted, but not loaded in this persistence context</th>
* <td>1. <tt>EntityExistsException</tt> thrown (or a <tt>PersistenceException</tt> at
* flush/commit)</td>
*
* <td>2. Existing entity loaded.<br>
* 2. State copied from object to loaded entity<br>
* 3. Loaded entity updated in database at flush/commit<br>
* 4. Loaded entity returned</td>
* <td>1. Object added to persistence context<br>
* 2. Loaded entity updated in database at flush/commit</td>
* </tr>
* <tr valign="top">
* <th>Object was previously persisted and already loaded in this persistence context</th>
* <td>1. <tt>EntityExistsException</tt> thrown (or a <tt>PersistenceException</tt> at flush or
* commit time)</td>
*
* <td>1. State from object copied to loaded entity<br>
* 2. Loaded entity updated in database at flush/commit<br>
* 3. Loaded entity returned</td>
* <td>1. <tt>NonUniqueObjectException</tt> thrown</td>
* </tr>
* </tbody>
* </table>
*
* @param newObject
*/
public <T> T merge(final T newObject) {
try {
return this.getEntityManager().merge(newObject);
} catch (final RuntimeException ex) {
PersistenceExceptions.throwFiltered(ex);
throw ex;
}
}
/**
* Invokes underlying persist implementation per jsr-220
*
* @see http://opensource.atlassian.com/projects/hibernate/browse/HHH-1273
* @param newObject
* @return
*/
public <T> T persist(final T newObject) {
try {
this.getEntityManager().persist(newObject);
return newObject;
} catch (final RuntimeException ex) {
PersistenceExceptions.throwFiltered(ex);
throw ex;
}
}
/**
* @see EntityWrapper#merge(Object)
* @param newObject
* @throws PersistenceException
*/
public <T> T mergeAndCommit(T newObject) {
try {
newObject = this.getEntityManager().merge(newObject);
this.commit();
return newObject;
} catch (final RuntimeException ex) {
try {
PersistenceExceptions.throwFiltered(ex);
throw ex;
} finally {
this.rollback();
}
}
}
@Override
public void commit() {
this.eventLog(TxStep.BEGIN, TxEvent.COMMIT);
try {
this.transaction.commit();
this.eventLog(TxStep.END, TxEvent.COMMIT);
} catch (final RuntimeException e) {
this.rollback();
this.eventLog(TxStep.FAIL, TxEvent.COMMIT);
PersistenceExceptions.throwFiltered(e);
throw e;
} finally {
this.cleanup();
}
}
@Override
public void rollback() {
this.eventLog(TxStep.BEGIN, TxEvent.ROLLBACK);
try {
if ((this.transaction != null) && this.transaction.isActive()) {
this.transaction.rollback();
}
this.eventLog(TxStep.END, TxEvent.ROLLBACK);
} catch (final Throwable e) {
this.eventLog(TxStep.FAIL, TxEvent.ROLLBACK);
PersistenceExceptions.throwFiltered(e);
} finally {
this.cleanup();
}
}
/**
* Returns the unique result from the database that exactly matches <code>example</code>. The
* differences between this method and {@link #getUnique(Object)} are:
*
* <ol>
* <li>{@link #getUnique(Object)} uses <i><code>enableLike</code></i> match and this method does
* not. <i><code>enableLike</code></i> criteria trips hibernate when special characters are
* involved. So it has been replaced by exact "=" (equals to)
* <li>Unique result logic is correctly implemented in this method. If the query returns more
* than one result, this method correctly throws an exception wrapping <code>
* NonUniqueResultException</code>. {@link #getUnique(Object)} does not throw an exception
* in this case and returns a result as long as it finds one or more matching results
* (because of the following properties set on the query: <code>setMaxResults(1)</code>,
* <code>setFetchSize(1)</code> and <code>setFirstResult(0)</code>)
* </ol>
*
* @param example
* @return
* @throws EucalyptusCloudException
*/
@SuppressWarnings("unchecked")
public <T> T getUniqueEscape(final T example) throws EucalyptusCloudException {
try {
Object id = null;
try {
id =
this.getEntityManager()
.getEntityManagerFactory()
.getPersistenceUnitUtil()
.getIdentifier(example);
} catch (final Exception ex) {
}
if (id != null) {
final T res = (T) this.getEntityManager().find(example.getClass(), id);
if (res == null) {
throw new NoSuchElementException("@Id: " + id);
} else {
return res;
}
} else if ((example instanceof HasNaturalId)
&& (((HasNaturalId) example).getNaturalId() != null)) {
final String natId = ((HasNaturalId) example).getNaturalId();
final T ret =
(T)
this.createCriteria(example.getClass())
.setLockMode(LockMode.NONE)
.setCacheable(true)
.add(Restrictions.naturalId().set("naturalId", natId))
.uniqueResult();
if (ret == null) {
throw new NoSuchElementException("@NaturalId: " + natId);
}
return ret;
} else {
final T ret =
(T)
this.createCriteria(example.getClass())
.setLockMode(LockMode.NONE)
.setCacheable(true)
.add(Example.create(example))
.uniqueResult();
if (ret == null) {
throw new NoSuchElementException("example: " + LogUtil.dumpObject(example));
}
return ret;
}
} catch (final NonUniqueResultException ex) {
throw new EucalyptusCloudException(
"Get unique failed for "
+ example.getClass().getSimpleName()
+ " because "
+ ex.getMessage(),
ex);
} catch (final NoSuchElementException ex) {
throw new EucalyptusCloudException(
"Get unique failed for "
+ example.getClass().getSimpleName()
+ " using "
+ ex.getMessage(),
ex);
} catch (final Exception ex) {
final Exception newEx = PersistenceExceptions.throwFiltered(ex);
throw new EucalyptusCloudException(
"Get unique failed for "
+ example.getClass().getSimpleName()
+ " because "
+ newEx.getMessage(),
newEx);
}
}