Refactored persistence for AVM. I'm guessing because I dropped a number of

unnecessary flushes seems about 20% snappier.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3296 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

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

@@ -0,0 +1,194 @@
+/*
+ * 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.
+ */
+
+package org.alfresco.repo.avm.hibernate;
+
+import java.util.Iterator;
+import java.util.List;
+
+import org.alfresco.repo.avm.AVMNode;
+import org.alfresco.repo.avm.AVMNodeDAO;
+import org.alfresco.repo.avm.AVMNodeImpl;
+import org.alfresco.repo.avm.AVMNodeUnwrapper;
+import org.alfresco.repo.avm.DirectoryNode;
+import org.alfresco.repo.avm.Repository;
+import org.hibernate.Query;
+import org.hibernate.Session;
+import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
+
+/**
+ * @author britt
+ *
+ */
+public class AVMNodeDAOHibernate extends HibernateDaoSupport implements
+        AVMNodeDAO
+{
+    /**
+     * Do nothing constructor.
+     */
+    public AVMNodeDAOHibernate()
+    {
+        super();
+    }
+    
+    /**
+     * Save the given node, having never been saved before.
+     */
+    public void save(AVMNode node)
+    {
+        getSession().save(node);
+    }
+
+    /**
+     * Get all the nodes owned by a Repository and make
+     * them no longer point at that Repository.
+     * @param rep The Repository.
+     */
+    @SuppressWarnings("unchecked")
+    public void dereferenceNodesInRepository(Repository rep)
+    {
+        Session sess = getSession();
+        Query query = sess.createQuery("from AVMNodeImpl an where an.repository = :rep");
+        query.setEntity("rep", rep);
+        Iterator<AVMNode> iter = (Iterator<AVMNode>)query.iterate();
+        while (iter.hasNext())
+        {
+            AVMNode node = iter.next();
+            node.setRepository(null);
+        }
+        sess.flush();
+    }
+
+    /**
+     * Delete a single node.
+     * @param node The node to delete.
+     */
+    public void delete(AVMNode node)
+    {
+        getSession().delete(node);
+    }
+
+    /**
+     * Get by ID.
+     * @param id The id to get.
+     */
+    public AVMNode getByID(long id)
+    {
+        return AVMNodeUnwrapper.Unwrap((AVMNode)getSession().get(AVMNodeImpl.class, id));
+    }
+
+    /**
+     * Get those nodes which are new in the given repository.
+     * @param repo The repository.
+     * @return A List of AVMNodes.
+     */
+    @SuppressWarnings("unchecked")
+    public List<AVMNode> getNewInRepo(Repository repo)
+    {
+        Query query = 
+            getSession().getNamedQuery("AVMNode.ByNewInRepo");
+        query.setEntity("repo", repo);
+        return (List<AVMNode>)query.list();
+    }
+    
+    /**
+     * Update a node that has been dirtied.
+     * @param node The node.
+     */
+    public void update(AVMNode node)
+    {
+        getSession().flush();
+    }
+    
+    /**
+     * Get the root of a particular version.
+     * @param rep The repository we're querying.
+     * @param version The version.
+     * @return The VersionRoot or null.
+     */
+    public DirectoryNode getRepositoryRoot(Repository rep, int version)
+    {
+        Query query = 
+            getSession().getNamedQuery("VersionRoot.GetVersionRoot");
+        query.setEntity("rep", rep);
+        query.setInteger("version", version);
+        AVMNode root = (AVMNode)query.uniqueResult();
+        if (root == null)
+        {
+            return null;
+        }
+        return (DirectoryNode)AVMNodeUnwrapper.Unwrap(root);
+    }
+
+    /**
+     * Get the ancestor of a node.
+     * @param node The node whose ancestor is desired.
+     * @return The ancestor or null.
+     */
+    public AVMNode getAncestor(AVMNode node)
+    {
+        Query query = getSession().createQuery("select hl.ancestor from HistoryLinkImpl hl where hl.descendent = :desc");
+        query.setEntity("desc", node);
+        return (AVMNode)query.uniqueResult();
+    }
+
+    /**
+     * Get the node the given node was merged from.
+     * @param node The node whose merged from is desired.
+     * @return The merged from node or null.
+     */
+    public AVMNode getMergedFrom(AVMNode node)
+    {
+        Query query = getSession().createQuery("select ml.mfrom from MergeLinkImpl ml where ml.mto = :to");
+        query.setEntity("to", node);
+        return (AVMNode)query.uniqueResult();
+    }
+
+    /**
+     * Get up to batchSize orphans. 
+     * @param batchSize Get no more than this number.
+     * @return A List of orphaned AVMNodes.
+     */
+    @SuppressWarnings("unchecked")
+    public List<AVMNode> getOrphans(int batchSize)
+    {
+        Query query = getSession().getNamedQuery("FindOrphans");
+        query.setMaxResults(batchSize);
+        return (List<AVMNode>)query.list();
+    }
+
+    /**
+     * Get all nodes that have the given repository as their owning repository.
+     * @param rep The Repository.
+     * @return An Iterator over the matching nodes.
+     */
+    @SuppressWarnings("unchecked")
+    public Iterator<AVMNode> getByRepository(Repository rep)
+    {
+        Query query = getSession().createQuery("from AVMNodeImpl an where an.repository = :rep");
+        query.setEntity("rep", rep);
+        return (Iterator<AVMNode>)query.iterate();
+    }
+
+    /**
+     * Inappropriate hack to get Hibernate to play nice.
+     */
+    public void flush()
+    {
+        getSession().flush();
+    }
+}