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From c..@apache.org
Subject svn commit: r440509 [2/2] - in /incubator/roller/branches/roller_3.0/sandbox/jdobackend/src/org/apache/roller/business: datamapper/ jdo/
Date Tue, 05 Sep 2006 22:19:19 GMT
Added: incubator/roller/branches/roller_3.0/sandbox/jdobackend/src/org/apache/roller/business/jdo/JDOPersistenceStrategy.java
URL: http://svn.apache.org/viewvc/incubator/roller/branches/roller_3.0/sandbox/jdobackend/src/org/apache/roller/business/jdo/JDOPersistenceStrategy.java?view=auto&rev=440509
==============================================================================
--- incubator/roller/branches/roller_3.0/sandbox/jdobackend/src/org/apache/roller/business/jdo/JDOPersistenceStrategy.java
(added)
+++ incubator/roller/branches/roller_3.0/sandbox/jdobackend/src/org/apache/roller/business/jdo/JDOPersistenceStrategy.java
Tue Sep  5 15:19:18 2006
@@ -0,0 +1,306 @@
+/*
+ * Copyright 2006 The Apache Software Foundation.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at 
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * 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.apache.roller.business.jdo;
+
+import java.util.Collection;
+import java.util.List;
+
+import javax.jdo.JDOHelper;
+import javax.jdo.PersistenceManager;
+import javax.jdo.PersistenceManagerFactory;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.roller.RollerException;
+import org.apache.roller.business.datamapper.DatamapperPersistenceStrategy;
+import org.apache.roller.business.datamapper.DatamapperQuery;
+import org.apache.roller.pojos.PersistentObject;
+import org.apache.roller.pojos.UserData;
+
+/**
+ * JDOPersistenceStrategy is responsible for the lowest-level interaction
+ * with the JDO API.
+ */
+public class JDOPersistenceStrategy implements DatamapperPersistenceStrategy {
+
+    /**
+     * The thread local PersistenceManager.
+     */
+    private static final ThreadLocal pmTLS = new ThreadLocal();
+
+    /**
+     * The PersistenceManagerFactory for this Roller instance.
+     */
+    private PersistenceManagerFactory pmf = null;
+
+    /**
+     * The logger instance for this class.
+     */
+    private static Log logger = LogFactory
+            .getFactory().getInstance(JDOPersistenceStrategy.class);
+
+    /**
+     * Construct by finding JDO PersistenceManagerFactory.
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public JDOPersistenceStrategy() 
+            throws RollerException {
+        PersistenceManagerFactory pmf = 
+                JDOHelper.getPersistenceManagerFactory("JDOPMF.properties");
+        this.pmf = pmf;
+    }
+
+    /**
+     * Flush changes to the datastore, commit transaction, release pm.
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public void flush() 
+            throws RollerException {
+        PersistenceManager pm = getPersistenceManager(false, false);
+        if (!isTransactionActive(pm))
+            return;
+        pm.currentTransaction().commit();
+    }
+
+    /**
+     * Release database session, rolls back any uncommitted changes.
+     */
+    public void release() {
+    }
+
+    /**
+     * Store object using an existing transaction.
+     * @param obj the object to persist
+     * @return the object persisted
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public PersistentObject store(PersistentObject obj) 
+            throws RollerException {
+        return obj;
+    }
+
+    /**
+     * Remove object from persistence storage.
+     * @param clazz the class of object to remove
+     * @param id the id of the object to remove
+     * @throws RollerException on any error deleting object
+     */
+    public void remove(Class clazz, String id) 
+            throws RollerException {
+    }
+
+    /**
+     * Remove object from persistence storage.
+     * @param po the persistent object to remove
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public void remove(PersistentObject po) 
+            throws RollerException {
+    }
+
+    /**
+     * Remove object from persistence storage.
+     * @param pos the persistent objects to remove
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public void removeAll(Collection pos) 
+            throws RollerException {
+    }
+
+    /**
+     * Remove instances based on query with query parameters
+     * @param clazz the class of instances to delete
+     * @param queryName the name of the query
+     * @param arg the argument to the query
+     * @return the number of instances removed
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public int removeAll(Class clazz, String queryName, Object arg) 
+            throws RollerException {
+        return 0;
+    }
+
+    /**
+     * Remove instances based on query with query parameters
+     * @param clazz the class of instances to delete
+     * @param queryName the name of the query
+     * @param arg the argument to the query
+     * @param types the types of the arguments to the query
+     * @return the number of instances removed
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public int removeAll(Class clazz, String queryName, 
+            Object arg, Object[] types)
+            throws RollerException {
+        return 0;
+    }
+
+    /**
+     * Remove instances based on query with no query parameters
+     * @param clazz the class of instances to delete
+     * @param queryName the name of the query
+     * @return the number of instances removed
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public int removeAll(Class clazz, String queryName)
+            throws RollerException {
+        return 0;
+    }
+
+    /**
+     * Remove objects from persistence storage.
+     * @param clazz the persistent from which to remove all objects 
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public void removeAll(Class clazz) 
+            throws RollerException {
+    }
+
+    /**
+     * Retrieve object, no transaction needed.
+     * @param clazz the class of object to retrieve
+     * @param id the id of the object to retrieve
+     * @return the object retrieved
+     * @throws RollerException on any error retrieving object
+     */
+    public PersistentObject load(Class clazz, String id) 
+            throws RollerException {
+        return null;
+    }
+
+    /**
+     * Execute query with one query parameter.
+     * @param clazz the class of instances to find
+     * @param queryName the name of the query
+     * @param arg the argument to the query
+     * @param types the types of the arguments to the query
+     * @return the results of the query
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public Object query(Class clazz, String queryName, Object arg)
+            throws RollerException {
+        return null;
+    }
+
+    /**
+     * Execute query with one query parameter.
+     * @param clazz the class of instances to find
+     * @param queryName the name of the query
+     * @param arg the argument to the query
+     * @param types the types of the arguments to the query
+     * @return the results of the query
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public Object query(Class clazz, String queryName, 
+            Object arg, Object[] types)
+            throws RollerException {
+        return null;
+    }
+
+    /**
+     * Execute query with query parameters.
+     * @param clazz the class of instances to find
+     * @param queryName the name of the query
+     * @param args the arguments to the query
+     * @return the results of the query
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public Object query(Class clazz, String queryName, Object[] args) 
+            throws RollerException {
+        return null;
+    }
+
+    /**
+     * Execute query with query parameters.
+     * @param clazz the class of instances to find
+     * @param queryName the name of the query
+     * @param args the arguments to the query
+     * @param types the types of the arguments to the query
+     * @return the results of the query
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public Object query(Class clazz, String queryName, 
+            Object[] args, Object[] types)
+            throws RollerException {
+        return null;
+    }
+
+    /**
+     * Execute query with no query parameters.
+     * @param queryName the name of the query
+     * @return the results of the query
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public Object query(Class clazz, String queryName) 
+            throws RollerException {
+        return query(clazz, queryName, null, null);
+    }
+
+    /**
+     * Remove instances based on query with query parameters.
+     * @param clazz the class of instances to delete
+     * @param queryName the name of the query
+     * @param args the arguments to the query
+     * @param types the types of the arguments to the query
+     * @return the number of instances removed
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public int removeAll(Class clazz, String queryName, 
+            Object[] args, Object[] types)
+            throws RollerException {
+        return 0;
+    }
+
+    /**
+     * Return true if a transaction is active on the 
+     * current PersistenceManager.
+     * @param pm the persistence manager
+     * @return true if the persistence manager is not null and has 
+     * an active transaction
+     */
+    private boolean isTransactionActive(PersistenceManager pm) {
+        if (pm == null)
+            return false;
+        return pm.currentTransaction().isActive()?true:false;
+    }
+
+    /**
+     * Get the PersistenceManager associated with the 
+     * current thread of control.
+     * @param isPMRequired true if a PersistenceManager is created 
+     * if not already associated with the thread of control
+     * @param isTransactionRequired true if a transaction is begun 
+     * if not already active
+     * @return the PersistenceManager
+     */
+    private PersistenceManager getPersistenceManager
+            (boolean isPMRequired, boolean isTransactionRequired) {
+        return null;
+    }
+
+    /**
+     * Create query.
+     * @param clazz the class of instances to find
+     * @param queryName the name of the query
+     * @throws org.apache.roller.RollerException on any error
+     */
+    public DatamapperQuery newQuery(Class clazz, String queryName)
+            throws RollerException {
+        PersistenceManager pm = getPersistenceManager(false, false);
+        return new JDOQueryImpl(pm, clazz, queryName);
+    }
+}
+



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