Having managed to get WCM-DEV royally screwed up, I made a new branch,

WCM-DEV2 and added back my changes.  


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@2804 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/hibernate/HibernateTxn.java

@@ -0,0 +1,93 @@
+package org.alfresco.repo.avm.hibernate;
+
+/*
+ * Copyright (C) 2006 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the
+ * License.
+ */
+
+import org.hibernate.HibernateException;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+
+/**
+ * Helper for DAOs.
+ * @author britt
+ */
+public class HibernateTxn
+{
+    /**
+     * The SessionFactory.
+     */
+    private SessionFactory fSessionFactory;
+    
+    /**
+     * Make one up.
+     * @param sessionFactory The SessionFactory.
+     */
+    public HibernateTxn(SessionFactory sessionFactory)
+    {
+        fSessionFactory = sessionFactory;
+    }
+    
+    /**
+     * Perform a set of operations under a single Hibernate transaction.
+     * @param callback The worker.
+     * @return Whether the operation finished with a commit.
+     */
+    public boolean perform(HibernateTxnCallback callback)
+    {
+        Session sess = null;
+        Transaction txn = null;
+        try
+        {
+            sess = fSessionFactory.openSession();
+            txn = sess.beginTransaction();
+            callback.perform(sess);
+            txn.commit();
+            return true;
+        }
+        catch (Throwable t)
+        {
+            t.printStackTrace(System.err);
+            if (txn != null)
+            {
+                try
+                {
+                    txn.rollback();
+                }
+                catch (HibernateException he)
+                {
+                    // Do nothing.
+                }
+            }
+            return false;
+        }
+        finally
+        {
+            if (sess != null)
+            {
+                try
+                {
+                    sess.close();
+                }
+                catch (HibernateException he)
+                {
+                    // Do nothing.
+                }
+            }
+        }
+    }
+}