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POAdding @Transactional causes "collection with cascade="all-delete-orphan" was no longer referenced"
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  1. POAdding @Transactional causes "collection with cascade="all-delete-orphan" was no longer referenced"
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    copied!<p>I am upgrading a working project from Spring2+Hibernate3 to Spring3+Hibernate4. Since HibernateTemplate and HibernateDAOSupport have been retired, I did the following </p> <p>Before (simplified)</p> <pre><code>public List&lt;Object&gt; loadTable(final Class&lt;?&gt; cls) { Session s = getSession(); // was calling the old Spring getSession Criteria c = s.createCriteria(cls); List&lt;Object&gt; objects = c.list(); if (objects == null) { objects = new ArrayList&lt;Object&gt;(); } closeSession(s); return objects; } </code></pre> <p>Now (simplified)</p> <pre><code>@Transactional(propagation=Propagation.REQUIRED) public List&lt;Object&gt; loadTable(final Class&lt;?&gt; cls) { Session s = sessionFactory.getCurrentSession(); Criteria c = s.createCriteria(cls); List&lt;Object&gt; objects = c.list(); if (objects == null) { objects = new ArrayList&lt;Object&gt;(); } return objects; } </code></pre> <p>I also added the transaction annotation declaration to Spring XML and removed this from Hibernate properties</p> <pre><code> "hibernate.current_session_context_class", "org.hibernate.context.ThreadLocalSessionContext" </code></pre> <p>The @Transactional annotation seems to have worked as I see this in the stacktrace </p> <pre><code>at com.database.spring.DatabaseDAOImpl$$EnhancerByCGLIB$$7d20ef95.loadTable(&lt;generated&gt;) </code></pre> <p>During initialization, the changes outlined above seem to work for a few calls to the loadTable function but when it gets around to loading an entity with a parent, I get the "collection with cascade="all-delete-orphan" was no longer referenced" error. Since I have not touched any other code that sets/gets parents or children and am only trying to fix the DAO method, and the query is only doing a sql SELECT, can anyone see why the code got broken?</p> <p>The problem seems similar to <a href="https://stackoverflow.com/questions/2774206/spring-transaction-management-breaks-hibernate-cascade">Spring transaction management breaks hibernate cascade</a></p>
 

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