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POPrevent Dozer from triggering Hibernate lazy loading
 

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    <p>I am using Spring transactions so the transaction is still active when POJO to DTO conversion occurs.</p> <p>I would like to prevent Dozer from triggering lazy loading, so that hidden sql queries never occur : all fetching has to be done explicitly via HQL (to get the best control on performances).</p> <ol> <li><p>Is it a good practice (I can't find it documented anywhere) ?</p></li> <li><p>How to do it safely ?</p></li> </ol> <p>I tried this before DTO conversion :</p> <pre><code>PlatformTransactionManager tm = (PlatformTransactionManager) SingletonFactoryProvider.getSingletonFactory().getSingleton("transactionManager"); tm.commit(tm.getTransaction(new DefaultTransactionDefinition())); </code></pre> <p>I don't know what happens to the transaction, but the Hibernate session doesn't get closed, and the lazy loading still occurs.</p> <p>I tried this :</p> <pre><code>SessionFactory sf = (SessionFactory) SingletonFactoryProvider.getSingletonFactory().getSingleton("sessionFactory"); sf.getCurrentSession().clear(); sf.getCurrentSession().close(); </code></pre> <p>And it prevents lazy loading, but is it a good practice to manipulate session directly in the application layer (which is called "facade" in my project) ? Which negative side effects should I fear ? (I've already seen that tests involving POJO -> DTO conversions could no more be launched through AbstractTransactionnalDatasource Spring test classes, because this classes try to trigger a rollback on a transaction which is no more linked to an active session).</p> <p>I've also tried to set propagation to NOT_SUPPORTED or REQUIRES_NEW, but it reuse the current Hibernate session, and doesn't prevent lazy loading.</p>
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