Add accountevents to product entity.

When buying products update the entity manager attachedproducts accounteventlist at the same time.
This allows viewing of product statistics without flushing caches.

code/MoyaBeans/ejbModule/fi/codecrew/moya/beans/ProductPBean.java

@@ -14,6 +14,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import fi.codecrew.moya.facade.AccountEventFacade;
+import fi.codecrew.moya.facade.ProductFacade;
 import fi.codecrew.moya.model.AccountEvent;
 import fi.codecrew.moya.model.Discount;
 import fi.codecrew.moya.model.DiscountInstance;
@@ -40,6 +41,9 @@ public class ProductPBean {
 	@EJB
 	private PlaceBean placebean;
 
+	@EJB
+	private ProductFacade productFacade;
+
 	private static final Logger logger = LoggerFactory
 			.getLogger(ProductPBean.class);
 
@@ -75,9 +79,12 @@ public class ProductPBean {
 			BigDecimal quantity, EventUser user, Calendar date,
 			FoodWave foodwave) {
 
+		if (!accounteventfacade.isAttached(product)) {
+			product = productFacade.reload(product);
+		}
+
 		if (!product.getEvent().equals(user.getEvent())) {
-			throw new EJBException(
-					"Trying to create accountevent for different event in user and product");
+			throw new EJBException("Trying to create accountevent for different event in user and product");
 		}
 		BigDecimal unitPrice = product.getPrice().negate();
 
@@ -110,6 +117,10 @@ public class ProductPBean {
 			// discountinstancefacade.create(discInst);
 			accEventdiscounts.add(new DiscountInstance(ret, d));
 		}
+		if (product.getAccountEvents() == null) {
+			product.setAccountEvents(new ArrayList<AccountEvent>());
+		}
+		product.getAccountEvents().add(ret);
 
 		user.addAccountevent(ret);
 		accounteventfacade.create(ret);

code/MoyaUtilities/src/main/java/fi/codecrew/moya/utilities/jpa/GenericFacade.java

@@ -289,4 +289,9 @@ public abstract class GenericFacade<C extends ModelInterface> {
 	public void evict(C entity) {
 		getEm().getEntityManagerFactory().getCache().evict(getEntityClass(), entity.getId());
 	}
+
+	public boolean isAttached(ModelInterface entity) {
+		return getEm().contains(entity);
+	}
+
 }