Java tutorial
/* * Copyright 2002-2013 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.springframework.orm.hibernate43; import java.io.IOException; import javax.persistence.Embeddable; import javax.persistence.Entity; import javax.persistence.MappedSuperclass; import javax.sql.DataSource; import javax.transaction.TransactionManager; import org.hibernate.HibernateException; import org.hibernate.MappingException; import org.hibernate.SessionFactory; import org.hibernate.cfg.AvailableSettings; import org.hibernate.cfg.Configuration; import org.hibernate.cfg.Environment; import org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory; import org.hibernate.engine.transaction.jta.platform.internal.WebSphereExtendedJtaPlatform; import org.springframework.core.io.Resource; import org.springframework.core.io.ResourceLoader; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.core.io.support.ResourcePatternResolver; import org.springframework.core.io.support.ResourcePatternUtils; import org.springframework.core.type.classreading.CachingMetadataReaderFactory; import org.springframework.core.type.classreading.MetadataReader; import org.springframework.core.type.classreading.MetadataReaderFactory; import org.springframework.core.type.filter.AnnotationTypeFilter; import org.springframework.core.type.filter.TypeFilter; import org.springframework.transaction.jta.JtaTransactionManager; import org.springframework.util.Assert; import org.springframework.util.ClassUtils; /** * A Spring-provided extension of the standard Hibernate {@link Configuration} class, * adding {@link SpringSessionContext} as a default and providing convenient ways * to specify a DataSource and an application class loader. * * <p>This is designed for programmatic use, e.g. in {@code @Bean} factory methods. * Consider using {@link LocalSessionFactoryBean} for XML bean definition files. * * <p><b>NOTE:</b> To set up Hibernate 4 for Spring-driven JTA transactions, make * sure to either use the {@link #setJtaTransactionManager} method or to set the * "hibernate.transaction.factory_class" property to {@link CMTTransactionFactory}. * Otherwise, Hibernate's smart flushing mechanism won't work properly. * * @author Juergen Hoeller * @since 3.1 * @see LocalSessionFactoryBean */ @SuppressWarnings("serial") public class LocalSessionFactoryBuilder extends Configuration { private static final String RESOURCE_PATTERN = "/**/*.class"; private static final String PACKAGE_INFO_SUFFIX = ".package-info"; private static final TypeFilter[] ENTITY_TYPE_FILTERS = new TypeFilter[] { new AnnotationTypeFilter(Entity.class, false), new AnnotationTypeFilter(Embeddable.class, false), new AnnotationTypeFilter(MappedSuperclass.class, false) }; private final ResourcePatternResolver resourcePatternResolver; /** * Create a new LocalSessionFactoryBuilder for the given DataSource. * @param dataSource the JDBC DataSource that the resulting Hibernate SessionFactory should be using * (may be {@code null}) */ public LocalSessionFactoryBuilder(DataSource dataSource) { this(dataSource, new PathMatchingResourcePatternResolver()); } /** * Create a new LocalSessionFactoryBuilder for the given DataSource. * @param dataSource the JDBC DataSource that the resulting Hibernate SessionFactory should be using * (may be {@code null}) * @param classLoader the ClassLoader to load application classes from */ public LocalSessionFactoryBuilder(DataSource dataSource, ClassLoader classLoader) { this(dataSource, new PathMatchingResourcePatternResolver(classLoader)); } /** * Create a new LocalSessionFactoryBuilder for the given DataSource. * @param dataSource the JDBC DataSource that the resulting Hibernate SessionFactory should be using * (may be {@code null}) * @param resourceLoader the ResourceLoader to load application classes from */ public LocalSessionFactoryBuilder(DataSource dataSource, ResourceLoader resourceLoader) { getProperties().put(Environment.CURRENT_SESSION_CONTEXT_CLASS, SpringSessionContext.class.getName()); if (dataSource != null) { getProperties().put(Environment.DATASOURCE, dataSource); } getProperties().put(AvailableSettings.APP_CLASSLOADER, resourceLoader.getClassLoader()); this.resourcePatternResolver = ResourcePatternUtils.getResourcePatternResolver(resourceLoader); } /** * Set the Spring {@link JtaTransactionManager} or the JTA {@link TransactionManager} * to be used with Hibernate, if any. Allows for using a Spring-managed transaction * manager for Hibernate 4's session and cache synchronization, with the * "hibernate.transaction.jta.platform" automatically set to it. Also sets * "hibernate.transaction.factory_class" to {@link CMTTransactionFactory}, * instructing Hibernate to interact with externally managed transactions. * <p>A passed-in Spring {@link JtaTransactionManager} needs to contain a JTA * {@link TransactionManager} reference to be usable here, except for the WebSphere * case where we'll automatically set {@link WebSphereExtendedJtaPlatform} accordingly. * <p>Note: If this is set, the Hibernate settings should not contain a JTA platform * setting to avoid meaningless double configuration. */ public LocalSessionFactoryBuilder setJtaTransactionManager(Object jtaTransactionManager) { Assert.notNull(jtaTransactionManager, "Transaction manager reference must not be null"); if (jtaTransactionManager instanceof JtaTransactionManager) { boolean webspherePresent = ClassUtils.isPresent("com.ibm.wsspi.uow.UOWManager", getClass().getClassLoader()); if (webspherePresent) { getProperties().put(AvailableSettings.JTA_PLATFORM, new WebSphereExtendedJtaPlatform()); } else { JtaTransactionManager jtaTm = (JtaTransactionManager) jtaTransactionManager; if (jtaTm.getTransactionManager() == null) { throw new IllegalArgumentException( "Can only apply JtaTransactionManager which has a TransactionManager reference set"); } getProperties().put(AvailableSettings.JTA_PLATFORM, new ConfigurableJtaPlatform(jtaTm.getTransactionManager(), jtaTm.getUserTransaction())); } } else if (jtaTransactionManager instanceof TransactionManager) { getProperties().put(AvailableSettings.JTA_PLATFORM, new ConfigurableJtaPlatform((TransactionManager) jtaTransactionManager, null)); } else { throw new IllegalArgumentException( "Unknown transaction manager type: " + jtaTransactionManager.getClass().getName()); } getProperties().put(AvailableSettings.TRANSACTION_STRATEGY, new CMTTransactionFactory()); return this; } /** * Add the given annotated classes in a batch. * @see #addAnnotatedClass * @see #scanPackages */ public LocalSessionFactoryBuilder addAnnotatedClasses(Class<?>... annotatedClasses) { for (Class<?> annotatedClass : annotatedClasses) { addAnnotatedClass(annotatedClass); } return this; } /** * Add the given annotated packages in a batch. * @see #addPackage * @see #scanPackages */ public LocalSessionFactoryBuilder addPackages(String... annotatedPackages) { for (String annotatedPackage : annotatedPackages) { addPackage(annotatedPackage); } return this; } /** * Perform Spring-based scanning for entity classes, registering them * as annotated classes with this {@code Configuration}. * @param packagesToScan one or more Java package names * @throws HibernateException if scanning fails for any reason */ public LocalSessionFactoryBuilder scanPackages(String... packagesToScan) throws HibernateException { try { for (String pkg : packagesToScan) { String pattern = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + ClassUtils.convertClassNameToResourcePath(pkg) + RESOURCE_PATTERN; Resource[] resources = this.resourcePatternResolver.getResources(pattern); MetadataReaderFactory readerFactory = new CachingMetadataReaderFactory( this.resourcePatternResolver); for (Resource resource : resources) { if (resource.isReadable()) { MetadataReader reader = readerFactory.getMetadataReader(resource); String className = reader.getClassMetadata().getClassName(); if (matchesEntityTypeFilter(reader, readerFactory)) { addAnnotatedClass(this.resourcePatternResolver.getClassLoader().loadClass(className)); } else if (className.endsWith(PACKAGE_INFO_SUFFIX)) { addPackage(className.substring(0, className.length() - PACKAGE_INFO_SUFFIX.length())); } } } } return this; } catch (IOException ex) { throw new MappingException("Failed to scan classpath for unlisted classes", ex); } catch (ClassNotFoundException ex) { throw new MappingException("Failed to load annotated classes from classpath", ex); } } /** * Check whether any of the configured entity type filters matches * the current class descriptor contained in the metadata reader. */ private boolean matchesEntityTypeFilter(MetadataReader reader, MetadataReaderFactory readerFactory) throws IOException { for (TypeFilter filter : ENTITY_TYPE_FILTERS) { if (filter.match(reader, readerFactory)) { return true; } } return false; } /** * Build the {@code SessionFactory}. */ @Override @SuppressWarnings("deprecation") public SessionFactory buildSessionFactory() throws HibernateException { ClassLoader appClassLoader = (ClassLoader) getProperties().get(AvailableSettings.APP_CLASSLOADER); Thread currentThread = Thread.currentThread(); ClassLoader threadContextClassLoader = currentThread.getContextClassLoader(); boolean overrideClassLoader = (appClassLoader != null && !appClassLoader.equals(threadContextClassLoader)); if (overrideClassLoader) { currentThread.setContextClassLoader(appClassLoader); } try { return super.buildSessionFactory(); } finally { if (overrideClassLoader) { currentThread.setContextClassLoader(threadContextClassLoader); } } } }