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POEclipseLink JPA `@PreUpdate` call not persisting
 

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  1. POEclipseLink JPA `@PreUpdate` call not persisting
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    <p>I ran into some similar questions on StackOverflow, tried the solutions, but did not find an answer. </p> <p>I am using a fairly common JPA strategy to set last modified times on some entities. Set up the columns and the fields, then tag a method with <code>@PreUpdate</code> and let it set them equal to the current time.</p> <p>The problem is that I can see in the debugger that the method is being called and that the field is being updated, however in my DB logs I only see a SQL call to UPDATE the changed field that does NOT include an UPDATE for the timestamp field.</p> <p>Complicating things further <code>@PrePersist</code> works perfectly, only <code>@PreUpdate</code> exibits this behaviour.</p> <p>The closest explanation I've found so far is at this <a href="http://www.eclipse.org/forums/index.php?t=msg&amp;goto=499756&amp;S=3bcc64b0e0822e7707f2ce0b616d92df" rel="nofollow noreferrer">LINK</a>.</p> <p>Similar questions at: #1725699 and #1745890</p> <p>I am using EclipseLink v2 and JPA v1 for compatibility with GlassFish v2.</p> <p>I have attempted using both annotations directly on methods in the Entity class as well as an <code>EntityListener</code> attached to the Entity class with the <code>@EntityListener</code> annotation.</p> <p>I suspect this is a bug in EclipseLink, but I can't prove it. </p> <p>Bug or not I would very much like this simple operation to work. Is there anything wrong with this implementation? Is this a known issue in EclipseLink? Is this a known issue in JPA? Is there a way around this? </p> <p>Short of going to the database and using triggers, is there an alternate path to let my Java code set the updated_on timestamp?</p> <p>Thanks for the advice!</p> <p>Code snippets follow.</p> <p>Entity fields:</p> <pre><code>@Column(name = "updated_on") @Temporal(TemporalType.TIMESTAMP) private Date updatedOn; @Column(name = "created_on") @Temporal(TemporalType.TIMESTAMP) private Date createdOn; </code></pre> <p>Annotated update methods:</p> <pre><code>@PreUpdate public void setUpdatedOn(Timestamped object) { object.setUpdatedOn(new Date()); } @PrePersist public void setCreatedOn(Timestamped object) { if (object.getCreatedOn()==null) { object.setCreatedOn(new Date()); } } </code></pre>
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