+++ /dev/null
-/*
- * Copyright 2005-2010 the original author or authors.
- *
- * 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.wamblee.support.persistence;
-
-import java.util.Map;
-import java.util.TreeMap;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import javax.persistence.EntityManager;
-import javax.persistence.EntityManagerFactory;
-import javax.persistence.EntityTransaction;
-import javax.persistence.Persistence;
-import javax.persistence.PersistenceException;
-
-import org.wamblee.support.jndi.StubInitialContextFactory;
-
-/**
- * Utility for building an appropriately configured EntityManagerFactory. The
- * idea is that a persistence.xml is used unchanged from the production version.
- * This utility will then add the additional properties required for execution
- * in a standalone environment.
- *
- * The other purpose is to to shield dependencies of the test code on a
- * particular JPA provider.
- */
-public class JpaBuilder {
-
- private static final Logger LOGGER = Logger.getLogger(JpaBuilder.class
- .getName());
-
- /**
- * Callback interface to execute some JPA code within a transaction with the
- * entitymanager to use provided as input.
- */
- public static interface JpaUnitOfWork<T> {
- /**
- * Executes the unit of work. A transaction has been started.
- *
- * @param aEm
- * Entity manager.
- * @return Result of the execute method. If you don't want to return
- * anything use <code>Void</code> for the return type and return
- * null from the implementation.
- */
- T execute(EntityManager aEm) throws Exception;
- }
-
- private PersistenceUnitDescription persistenceUnit;
- private String url;
- private String user;
- private String password;
- private EntityManagerFactory factory;
-
- /**
- * Constructs the builder.
- *
- * @param aUrl JDBC URL
- * @param aUser User name
- * @param aPassword Password.
- * @param aPersistenceUnit
- * Persistence unit.
- */
- public JpaBuilder(String aUrl, String aUser, String aPassword,
- PersistenceUnitDescription aPersistenceUnit) {
- persistenceUnit = aPersistenceUnit;
- url = aUrl;
- user = aUser;
- password = aPassword;
- }
-
- /**
- * Starts the builder, which in particular, mocks JNDI, binds the datasource
- * the JNDI where the persistence unit expects it, creates the entity
- * manager factory, and forces creation of the database schema.
- */
- public void start() throws Exception {
- factory = createFactory();
- try {
- execute(new JpaUnitOfWork<Void>() {
- public Void execute(EntityManager aEm) {
- // Empty, just to trigger database schema creation.
- return null;
- }
- });
- } catch (PersistenceException e) {
- factory.close();
- throw e;
- }
- }
-
- /**
- * Stops the entity manager factory and disables JNDI mocking.
- */
- public void stop() {
- StubInitialContextFactory.unregister();
- factory.close();
- }
-
- /**
- * Creates a new entity manager factory. Typically not used by test code.
- *
- * @return Entity manager factory.
- */
- public EntityManagerFactory createFactory() {
- Map<String, String> jpaProps = new TreeMap<String, String>();
-
- jpaProps.put("javax.persistence.jtaDataSource", null);
- jpaProps.put("javax.persistence.transactionType", "RESOURCE_LOCAL");
- jpaProps.put("javax.persistence.jdbc.url", url);
- jpaProps.put("javax.persistence.jdbc.user", user);
- jpaProps.put("javax.persistence.jdbc.password", password);
-
- JpaCustomizerBuilder.getCustomizer().customize(persistenceUnit,
- jpaProps);
-
- // jpaProps.put("javax.persistence.provider",
- // HibernatePersistence.class.getName());
- EntityManagerFactory emf = Persistence.createEntityManagerFactory(
- persistenceUnit.getUnitName(), jpaProps);
-
- LOGGER.info("Using " + emf.getClass());
- return emf;
- }
-
- /**
- * Executes a unit of work. This creates an entitymanager and runs the
- * {@link JpaUnitOfWork#execute(EntityManager)} within a transaction,
- * passing it the entity manager. Use of this method saves a lot of typing
- * for applications.
- *
- * @param aWork
- * Work to execute.
- * @return The return value of the execute method of the unit of work.
- */
- public <T> T execute(JpaUnitOfWork<T> aWork) throws Exception {
- EntityManager em = factory.createEntityManager();
- EntityTransaction transaction = em.getTransaction();
- transaction.begin();
- try {
- T value = aWork.execute(em);
- transaction.commit();
- return value;
- } catch (Exception e) {
- LOGGER.log(Level.WARNING, "Exception occured", e);
- transaction.rollback();
- throw e;
- } finally {
- em.close();
- }
- }
-}
git://wamblee.org / utils / blobdiff