From 723c66ea036b5bc53ddeee0005e335cffff16a45 Mon Sep 17 00:00:00 2001
From: Stefan Suhren <suhren.stefan@fh-swf.de>
Date: Mon, 23 Nov 2015 14:42:32 +0100
Subject: Use singleton for EntityManagerFactory

---
 src/beans/CategoryManager.java | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

(limited to 'src/beans/CategoryManager.java')

diff --git a/src/beans/CategoryManager.java b/src/beans/CategoryManager.java
index fc3d438..db42f37 100644
--- a/src/beans/CategoryManager.java
+++ b/src/beans/CategoryManager.java
@@ -17,11 +17,10 @@ import javax.faces.bean.ManagedBean;
 import javax.faces.bean.SessionScoped;
 import javax.faces.context.FacesContext;
 import javax.persistence.EntityManager;
-import javax.persistence.EntityManagerFactory;
 import javax.persistence.EntityTransaction;
-import javax.persistence.Persistence;
 
 import jpa.Category;
+import jpa.EntityManagerFactorySingleton;
 
 @ManagedBean(name = "CategoryManager")
 @SessionScoped
@@ -41,10 +40,14 @@ public class CategoryManager
 
    public Collection getCategories()
    {
-      EntityManagerFactory factory = Persistence
-            .createEntityManagerFactory("catalog");
-      EntityManager manager = factory.createEntityManager();
-      return manager.createQuery("SELECT c FROM Category c ").getResultList();
+      EntityManager manager = EntityManagerFactorySingleton.getInstance()
+            .getEntityManagerFactory().createEntityManager();
+
+      Collection categories = manager.createQuery("SELECT c FROM Category c ")
+            .getResultList();
+      manager.close();
+
+      return categories;
    }
 
    public void select(javax.faces.event.ActionEvent actionEvent)
@@ -54,9 +57,8 @@ public class CategoryManager
       Integer selectedId = Integer.valueOf((String) params.get("selectedId"));
       // System.out.println(selectedId);
 
-      EntityManagerFactory factory = Persistence
-            .createEntityManagerFactory("catalog");
-      EntityManager manager = factory.createEntityManager();
+      EntityManager manager = EntityManagerFactorySingleton.getInstance()
+            .getEntityManagerFactory().createEntityManager();
 
       EntityTransaction tx = manager.getTransaction();
       tx.begin();
@@ -83,5 +85,6 @@ public class CategoryManager
          e.printStackTrace();
       }
       context.responseComplete();
+      manager.close();
    }
 }
-- 
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