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POSession Listener in Spring Mvc Google app engine
 

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    <p>I am using Google App Engine, spring mvc and spring jpa dao. In my application i want to delete an entry from the database when session is destroyed. So i am using session listeners which actually wants to deletes an entry from the database through spring dao bean.</p> <p>Here is my code in session listener</p> <pre><code>@Override public void sessionDestroyed(HttpSessionEvent se) { //get entry from session and now remove entry from database getMyDao(se).delete(entry); } private MyDao getMyDao(HttpSessionEvent sessionEvent){ HttpSession session = sessionEvent.getSession(); ApplicationContext ctx = WebApplicationContextUtils. getWebApplicationContext(session.getServletContext()); MyDao dao = (MyDao) ctx.getBean("myDao"); return dao; } </code></pre> <p>I am getting the below error when i try deleting</p> <p>java.lang.NullPointerException: No API environment is registered for this thread. at com.google.appengine.api.datastore.DatastoreApiHelper.getCurrentAppId(DatastoreApiHelper.java:108) at com.google.appengine.api.datastore.DatastoreApiHelper.getCurrentAppIdNamespace(DatastoreApiHelper.java:118) at com.google.appengine.api.datastore.Query.(Query.java:112) at org.datanucleus.store.appengine.query.DatastoreQuery.validate(DatastoreQuery.java:794) at org.datanucleus.store.appengine.query.DatastoreQuery.performExecute(DatastoreQuery.java:225) at org.datanucleus.store.appengine.query.JPQLQuery.performExecute(JPQLQuery.java:80)</p> <p>Can any one please tell me why api environment is not registered when i invoke from session listener?</p>
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