Java tutorial
/* * 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.openjpa.jdbc.meta.strats; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.Query; import org.apache.commons.lang.StringUtils; import org.apache.openjpa.conf.OpenJPAConfiguration; import org.apache.openjpa.datacache.DataCachePCData; import org.apache.openjpa.jdbc.sql.DB2Dictionary; import org.apache.openjpa.jdbc.sql.MySQLDictionary; import org.apache.openjpa.jdbc.sql.OracleDictionary; import org.apache.openjpa.jdbc.sql.SQLServerDictionary; import org.apache.openjpa.meta.ClassMetaData; import org.apache.openjpa.persistence.JPAFacadeHelper; import org.apache.openjpa.persistence.OpenJPAEntityManager; import org.apache.openjpa.persistence.test.SingleEMFTestCase; /** * This abstract class defines all the tests for LOB streaming. * * @author Ignacio Andreu * @since 1.1.0 */ public abstract class AbstractLobTest extends SingleEMFTestCase { protected static boolean firstTestExecuted; protected List<Class<?>> supportedDatabases = new ArrayList<Class<?>>(Arrays.asList(MySQLDictionary.class, OracleDictionary.class, SQLServerDictionary.class, DB2Dictionary.class)); public void setUp() throws Exception { setSupportedDatabases(supportedDatabases.toArray(new Class<?>[] {})); if (isTestsDisabled()) { return; } // Test CREATE TABLE but only once to save time. Object clearOrDropTables = (firstTestExecuted) ? CLEAR_TABLES : DROP_TABLES; firstTestExecuted = true; super.setUp(getLobEntityClass(), clearOrDropTables, "openjpa.DataCache", "true", "openjpa.RemoteCommitProvider", "sjvm", "openjpa.ConnectionRetainMode", "transaction"); } public void insert(LobEntity le) { EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); em.persist(le); em.getTransaction().commit(); em.close(); } public void testInsert() { insert(newLobEntity(createLobData(), 1)); } public void testInsertAndSelect() throws IOException { String s = createLobData(); insert(newLobEntity(s, 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); Query query = em.createQuery(getSelectQuery()); LobEntity entity = (LobEntity) query.getSingleResult(); assertNotNull(entity.getStream()); assertEquals(s, getStreamContentAsString(entity.getStream())); em.getTransaction().commit(); em.close(); } public void testInsertNull() { insert(newLobEntity(null, 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity le = (LobEntity) em.find(getLobEntityClass(), 1); assertNull(le.getStream()); em.getTransaction().commit(); em.close(); } public void testUpdate() throws IOException { insert(newLobEntity(createLobData(), 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity entity = (LobEntity) em.find(getLobEntityClass(), 1); String string = createLobData2(); changeStream(entity, string); em.getTransaction().commit(); em.close(); em = emf.createEntityManager(); em.getTransaction().begin(); entity = (LobEntity) em.find(getLobEntityClass(), 1); assertEquals(string, getStreamContentAsString(entity.getStream())); em.getTransaction().commit(); em.close(); } public void testUpdateWithNull() { insert(newLobEntity(createLobData(), 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity entity = (LobEntity) em.find(getLobEntityClass(), 1); entity.setStream(null); em.getTransaction().commit(); em.close(); em = emf.createEntityManager(); em.getTransaction().begin(); entity = (LobEntity) em.find(getLobEntityClass(), 1); assertNull(entity.getStream()); em.getTransaction().commit(); em.close(); } public void testUpdateANullObjectWithoutNull() throws IOException { insert(newLobEntity(null, 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity entity = (LobEntity) em.find(getLobEntityClass(), 1); String string = createLobData2(); changeStream(entity, string); em.getTransaction().commit(); em.close(); em = emf.createEntityManager(); em.getTransaction().begin(); entity = (LobEntity) em.find(getLobEntityClass(), 1); assertEquals(string, getStreamContentAsString(entity.getStream())); em.getTransaction().commit(); em.close(); } public void testDelete() { insert(newLobEntity(createLobData(), 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity entity = (LobEntity) em.find(getLobEntityClass(), 1); em.remove(entity); em.getTransaction().commit(); em.close(); em = emf.createEntityManager(); em.getTransaction().begin(); Query q = em.createQuery(getSelectQuery()); assertEquals(0, q.getResultList().size()); em.getTransaction().commit(); em.close(); } public void testLifeCycleInsertFlushModify() { EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity le = newLobEntity(createLobData(), 1); em.persist(le); em.flush(); changeStream(le, createLobData2()); em.getTransaction().commit(); em.close(); } public void testLifeCycleLoadFlushModifyFlush() { insert(newLobEntity(createLobData(), 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity entity = (LobEntity) em.find(getLobEntityClass(), 1); em.flush(); changeStream(entity, createLobData2()); em.flush(); em.getTransaction().commit(); em.close(); } public void testReadingMultipleTimesWithASingleConnection() throws IOException { insert(newLobEntity(createLobData(), 1)); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity le = (LobEntity) em.find(getLobEntityClass(), 1); String string = createLobData2(); changeStream(le, string); em.getTransaction().commit(); em.close(); em = emf.createEntityManager(); em.getTransaction().begin(); le = (LobEntity) em.find(getLobEntityClass(), 1); assertNotNull(le.getStream()); LobEntity entity = newLobEntity(createLobData(), 2); em.persist(entity); assertEquals(string, getStreamContentAsString(le.getStream())); em.getTransaction().commit(); em.close(); } public void testDataCache() { OpenJPAEntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity le = newLobEntity(createLobData(), 1); em.persist(le); em.getTransaction().commit(); OpenJPAConfiguration conf = emf.getConfiguration(); Object o = em.getObjectId(le); ClassMetaData meta = JPAFacadeHelper.getMetaData(le); Object objectId = JPAFacadeHelper.toOpenJPAObjectId(meta, o); DataCachePCData pcd = conf.getDataCacheManagerInstance().getSystemDataCache().get(objectId); assertFalse(pcd.isLoaded(meta.getField("stream").getIndex())); em.close(); } public void testSetResetAndFlush() throws IOException { EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity le = newLobEntity(createLobData(), 1); em.persist(le); String string = createLobData2(); changeStream(le, string); em.flush(); em.getTransaction().commit(); em.close(); em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity entity = (LobEntity) em.find(getLobEntityClass(), 1); assertEquals(string, getStreamContentAsString(entity.getStream())); em.getTransaction().commit(); em.close(); } public void testSetFlushAndReset() throws IOException { EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); LobEntity le = newLobEntity(createLobData(), 1); em.persist(le); em.flush(); String string = createLobData2(); changeStream(le, string); LobEntity entity = (LobEntity) em.find(getLobEntityClass(), 1); assertEquals(string, getStreamContentAsString(entity.getStream())); em.getTransaction().commit(); em.close(); } protected String createLobData() { return StringUtils.repeat("ooOOOOoo, ", 3000); } protected String createLobData2() { return StringUtils.repeat("iiIIIIii, ", 1000); } protected abstract Class getLobEntityClass(); protected abstract String getStreamContentAsString(Object o) throws IOException; protected abstract LobEntity newLobEntity(String s, int id); protected abstract LobEntity newLobEntityForLoadContent(String s, int id); protected abstract String getSelectQuery(); protected abstract void changeStream(LobEntity le, String s); }