public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
try {
PersistenceManager pm = pmf.getPersistenceManager();
Query query = pm.newQuery(BlipEntry.class);
List<BlipEntry> list = (List<BlipEntry>) query.execute();
pm.deletePersistentAll(list);
} catch (Exception e) {
e.printStackTrace();
log.warning(e.getMessage());
resp.sendError(HttpServletResponse.SC_BAD_REQUEST, e.getMessage());
}