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    <p>I use CDI interceptors to create and tear down JDO PMs in our web apps.</p> <p>You can define an interceptor method relying on ThreadLocal in a helper class. I'm simplifying my code here (read: untested :) ) as you may have to deal with multiple data sources, re-entrances, etc., but as illustration:</p> <pre><code>public class MyJDO_Helper { private static ThreadLocal&lt;PersistenceManager&gt; localPM = new ThreadLocal&lt;&gt;(); @AroundInvoke public Object allocatePersistenceManager(InvocationContext ctx) throws Exception { PersistenceManager pm = localPM.get(); if (pm == null) { pm = getNewPersistenceManager(); localPM.set(pm); } try { return ctx.proceed(); } catch(Error err) { // to log them before Jersey blows casting them to Ex log.log(Level.SEVERE, "Caught " + err, err); throw err; } finally { try { if (pm.currentTransaction().isActive()) { pm.currentTransaction().rollback(); } pm.close(); } catch(Exception ex) { log.log(Level.SEVERE, "Error closing JDO PM: " + ex, ex); } } } public static PersistenceManager getPersistenceManager() { return localPM.get(); } </code></pre> <p>Then you can decalre this interceptor on Jersey resource methods needing JDO access:</p> <pre><code>@ManagedBean // for interceptors @Path("/my") public class MyResource { @GET @Interceptors({MyJDO_Helper.class}) public String get() { PersistenceManager pm = MyJDO_Helper.getPersistenceManager(); </code></pre> <p>At that point you can call MyJDO_Helper.getPersistenceManager() from anywhere in your code (even not Jersey classes) anytime and you'll always get the right PM without the need to pass it around. :)</p>
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    1. POJDO PersistenceManager injection to GlassFish 4 Jersey 2 RESTful web application
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    1. USTheArchitect
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    1. COI need to take a closer look at CDI for this purpose when I have time to return to this. Thanks for the pointer, @TheArchitect. I'll confirm it once I've had the opportunity to test it in practice.
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