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POHibernate interceptor: entity intercepted when a collection element updated
 

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  1. POHibernate interceptor: entity intercepted when a collection element updated
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    <p>I need to know how can I set Hibernate (...) to achieve the following issue:</p> <p>I have a bidirectional (composition) one-to-many association (a.bs is a Set object and b.a is a A object). When I load "a" from DB and I update one of its "bs" I need Hiernate intercept A entity when saveOrUpdate A.</p> <p>Code:</p> <pre><code>public class A { Set&lt;B&gt; bs = new HashSet&lt;B&gt;(); // ... other fields and setters/getters } public class B { A a = null; // ... other fields and setters/getters } </code></pre> <p>Use case:</p> <pre><code>A a = load("idA"); // load A from DB B b = s.getBById("idB"); // get a B element of A b.setName("blablabla"); // update a field of B saveOrUpdate(a); // persist A entity with its Bs (including modified B) </code></pre> <p>The change is performed because the (mini)model has been annotated properly.</p> <p>The problem is that my interceptor only detects the change in B entity, but not A. I need to detect A change because I need to update audit info.</p> <p>Other point of view is: I need to get A entity via B and update it. In fact, I can get A from B, but the change is not persisted...</p> <p>Simplifying the question: <strong>I have to modify A entity (set a date) when my interceptor intercepts B entity. It worksfine in onSave but not in onFlushDirty. Why?</strong></p> <p>This is: When B is updated, is intercepted (onFlushDirty). The body of onFlushDirty method, among other things, do this:</p> <pre><code>b.getA().setLastModifyDate(new Date()); </code></pre> <p>So, in that moment, A entity , that is attached to session, should became dirty, hence it should raise an interception action... I mean, the onFlushDirty method should be called again, his time for A entity. Am I wrong? But, in any case, A.lastModifyDate should be updated... and this is not happening!!!</p> <p>Following I show the actual behaviour of my application:</p> <ol> <li>I create an A object</li> <li>I create a B object and I associate it to A</li> <li><p>I persist A => A.lastModifyDate is the correct date (<strong>OK</strong>)</p></li> <li><p>I create an A object</p></li> <li>I create a B object and I associate it to A</li> <li>I persist A => A.lastModifyDate is the correct date (<strong>OK</strong>)</li> <li><p>I load the B object, I update it and I persist B -> A.lastModifyDate is the correct date (<strong>OK</strong>)</p></li> <li><p>I create an A object</p></li> <li>I create a B object and I associate it to A</li> <li>I persist A => A.lastModifyDate is the correct date (<strong>OK</strong>)</li> <li><p>I load A object, I update its B object and I persist A -> A.lastModifyDate <strong>is not</strong> the correct date (<strong>KO</strong>)</p></li> <li><p>I create an A object</p></li> <li>I create a B object and I associate it to A</li> <li>I persist A => A.lastModifyDate is the correct date (<strong>OK</strong>)</li> <li><p>I load A object, I update any A's field and also its B object and I persist A -> A.lastModifyDate <strong>is not</strong> the correct date (<strong>KO</strong>)</p></li> <li><p>I create an A object and I persist it.</p></li> <li><p>I load A object, I associate to it a new B object and I persist A => A.lastModifyDate is the correct date (<strong>OK</strong>)</p></li> <li><p>I create an A object and I persist it.</p></li> <li>I load A object, I update any A's field, I associate to it a new B object and I persist A => A.lastModifyDate is the correct date (<strong>OK</strong>)</li> </ol> <p>Any idea?</p> <p>Thanks!</p>
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    1. USAlberthoven
    1. USAlberthoven
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      1. POHibernate interceptor: entity intercepted when a collection element updated
      1. USBlake Pettersson
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    1. COCan you clarify what you mean by "intercept" here? The actual interceptor? Event listener? Cascading behavior?
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    2. COactual interceptor! I don't use listeners.
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      1. USAlberthoven
 

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