Usage Server logging and peristance xml improvements

edu.washington.cs.cupid.usage.server/src/META-INF/persistence.xml

@@ -11,11 +11,14 @@
         <class>edu.washington.cs.cupid.usage.server.data.CupidUser</class>
         <class>edu.washington.cs.cupid.usage.server.data.SystemData</class>
 
+        <exclude-unlisted-classes>true</exclude-unlisted-classes>
+
         <properties>
             <property name="datanucleus.NontransactionalRead" value="true"/>
             <property name="datanucleus.NontransactionalWrite" value="true"/>
             <property name="datanucleus.ConnectionURL" value="appengine"/>
             <property name="datanucleus.singletonEMFForName" value="true"/>
         </properties>
     </persistence-unit>
+
 </persistence>

edu.washington.cs.cupid.usage.server/src/edu/washington/cs/cupid/usage/server/CupidUsageDataServlet.java

@@ -39,7 +39,12 @@ public class CupidUsageDataServlet extends HttpServlet {
 	private Gson gson = new Gson();
 
 	private void writeSession(final JsonCupidSession raw){
+		if (raw == null) throw new IllegalArgumentException("Received null session data from client");
+
+		log.info("Received data for uuid " + raw.uuid);
+
 		EntityManager em = EMFService.get().createEntityManager();
+		if (em == null) throw new RuntimeException("Error loading entity manager");
 
 		try{
 			EntityTransaction tx = em.getTransaction();
@@ -68,7 +73,10 @@ private void writeSession(final JsonCupidSession raw){
 				em.persist(user);
 
 				tx.commit();
+
+				log.info("Recorded data for uuid " + raw.uuid);
 			} catch (RuntimeException ex){
+				log.log(Level.WARNING, "Error recording data for uuid " + raw.uuid, ex);
 				throw ex;
 			} finally {
 				if (tx.isActive()){

edu.washington.cs.cupid.usage.server/war/WEB-INF/logging.properties

@@ -10,4 +10,4 @@
 #
 
 # Set the default logging level for all loggers to WARNING
-.level = WARNING
+.level = INFO