| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.jdo.tck.api.persistencemanager; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| import javax.jdo.Query; |
| import javax.jdo.Transaction; |
| |
| import org.apache.jdo.tck.pc.mylib.PCPoint; |
| import org.apache.jdo.tck.pc.mylib.PCRect; |
| import org.apache.jdo.tck.util.BatchTestRunner; |
| |
| /** |
| *<B>Title:</B> Only one instance of persistent object in cache per |
| PersistenceManager |
| *<BR> |
| *<B>Keywords:</B> cache |
| *<BR> |
| *<B>Assertion ID:</B> A5.4-10. |
| *<BR> |
| *<B>Assertion Description: </B> |
| JDO implementations must manage the cache of JDO instances such that there is |
| only one JDO instance, associated with each <code>PersistenceManager</code> |
| representing the persistent state of each corresponding data store object. |
| */ |
| |
| public class OneInstanceOfObjectPerPersistenceManager extends |
| PersistenceManagerTest { |
| |
| /** */ |
| private static final String ASSERTION_FAILED = |
| "Assertion A5.4-10 (OneInstanceOfObjectPerPersistenceManager) " + |
| "failed: "; |
| |
| /** |
| * The <code>main</code> is called when the class |
| * is directly executed from the command line. |
| * @param args The arguments passed to the program. |
| */ |
| public static void main(String[] args) { |
| BatchTestRunner.run(OneInstanceOfObjectPerPersistenceManager.class); |
| } |
| |
| /** |
| * This test creates objects in one transaction and commits. |
| * The important object is p1. |
| * Then, in a second transaction, it gets an object p1a by id, |
| * gets another object p1b by navigation, and a third object p1c by |
| * query. All of these represent the same datastore object and |
| * therefore must be identical in the same PersistenceManager. |
| */ |
| public void test() { |
| /** The getPM method is declared in a superclass. |
| * This is the standard way to get a PersistenceManager. |
| * The method automatically gets a PersistenceManagerFactory, |
| * gets a PersistenceManager, and puts the PersistenceManager into |
| * the field pm. |
| */ |
| getPM(); |
| /** This is the standard way to get a Transaction. |
| */ |
| Transaction tx = pm.currentTransaction(); |
| |
| /** Any values for these flags should be set before |
| * beginning a transaction. |
| */ |
| tx.setRetainValues(false); |
| tx.setRestoreValues(false); |
| |
| /** This is the standard way to begin a transaction. |
| */ |
| tx.begin(); |
| /** Create new objects to be persisted. |
| */ |
| PCPoint p1 = new PCPoint(10, 20); |
| PCPoint p2 = new PCPoint(20, 40); |
| PCRect rect = new PCRect(0, p1, p2); |
| /** This test relies on persistence by reachability. |
| */ |
| pm.makePersistent(rect); |
| /** This is the standard way to commit a transaction. |
| */ |
| tx.commit(); |
| |
| /** Begin a new transaction so that the navigation |
| * uses the object id to load the target object into the cache. |
| * The RetainValues flag false guarantees that the object fields |
| * are no longer loaded. |
| */ |
| tx.begin(); |
| Object p1Id = pm.getObjectId(p1); |
| /** Retrieves the field values from the datastore. |
| */ |
| PCPoint p1a = (PCPoint)pm.getObjectById(p1Id, true); |
| /** Navigate to the point. |
| */ |
| PCPoint p1b = rect.getUpperLeft(); |
| /** Query for the point by its values in the datastore. |
| */ |
| PCPoint p1c = findPoint(10, 20); |
| tx.commit(); |
| tx = null; |
| |
| /** Use a StringBuffer to collect results. |
| */ |
| StringBuffer results = new StringBuffer(); |
| |
| /** Compare the original object with the object obtained |
| * by getObjectById. |
| */ |
| if (p1 != p1a) { |
| results.append("getObjectById results differ. "); |
| } |
| |
| /** Compare the original object with the object obtained |
| * by navigating from another object. |
| */ |
| if (p1 != p1b) { |
| results.append("navigation results differ. "); |
| } |
| /** Compare the original object with the object obtained |
| * by query. |
| */ |
| if (p1 != p1c) { |
| results.append("query results differ. "); |
| } |
| if (results.length() != 0) { |
| fail(ASSERTION_FAILED + results.toString()); |
| } |
| |
| /** The standard way to end each test method is to simply return. |
| * Exceptions are caught by JUnit. |
| * The tearDown method ends the transaction and closes |
| * the PersistenceManager. |
| */ |
| } |
| |
| /** */ |
| private PCPoint findPoint (int x, int y) { |
| Query q = getPM().newQuery (PCPoint.class); |
| q.declareParameters ("int px, int py"); |
| q.setFilter ("x == px & y == py"); |
| Collection results = (Collection)q.execute (new Integer(x), |
| new Integer(y)); |
| Iterator it = results.iterator(); |
| PCPoint ret = (PCPoint)it.next(); |
| return ret; |
| } |
| |
| } |