Java tutorial
/* * Copyright 2010-2012 The MyBatis Team * * 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 com.bolo.orm.mybatis; import static org.springframework.util.Assert.notNull; import static org.springframework.util.ObjectUtils.isEmpty; import static org.springframework.util.StringUtils.hasLength; import static org.springframework.util.StringUtils.tokenizeToStringArray; import java.io.IOException; import java.sql.SQLException; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Properties; import java.util.Set; import javax.sql.DataSource; import org.apache.ibatis.builder.xml.XMLConfigBuilder; import org.apache.ibatis.builder.xml.XMLMapperBuilder; import org.apache.ibatis.executor.ErrorContext; import org.apache.ibatis.logging.Log; import org.apache.ibatis.logging.LogFactory; import org.apache.ibatis.mapping.DatabaseIdProvider; import org.apache.ibatis.mapping.DefaultDatabaseIdProvider; import org.apache.ibatis.mapping.Environment; import org.apache.ibatis.plugin.Interceptor; import org.apache.ibatis.session.Configuration; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.apache.ibatis.transaction.TransactionFactory; import org.apache.ibatis.type.TypeHandler; import org.mybatis.spring.transaction.SpringManagedTransactionFactory; import org.springframework.beans.factory.FactoryBean; import org.springframework.beans.factory.InitializingBean; import org.springframework.context.ApplicationEvent; import org.springframework.context.ApplicationListener; import org.springframework.context.ConfigurableApplicationContext; import org.springframework.context.event.ContextRefreshedEvent; import org.springframework.core.NestedIOException; import org.springframework.core.io.Resource; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.core.io.support.ResourcePatternResolver; import org.springframework.core.type.classreading.MetadataReader; import org.springframework.core.type.classreading.MetadataReaderFactory; import org.springframework.core.type.classreading.SimpleMetadataReaderFactory; import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy; /** * {@code FactoryBean} that creates an MyBatis {@code SqlSessionFactory}. This * is the usual way to set up a shared MyBatis {@code SqlSessionFactory} in a * Spring application context; the SqlSessionFactory can then be passed to * MyBatis-based DAOs via dependency injection. * * Either {@code DataSourceTransactionManager} or {@code JtaTransactionManager} * can be used for transaction demarcation in combination with a * {@code SqlSessionFactory}. JTA should be used for transactions which span * multiple databases or when container managed transactions (CMT) are being * used. * * @see #setConfigLocation * @see #setDataSource * @version $Id: SqlSessionFactoryBean.java 4955 2012-03-18 09:16:58Z * eduardo.macarron $ */ @SuppressWarnings("deprecation") public class SqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent> { private final Log logger = LogFactory.getLog(getClass()); private Resource configLocation; private Resource[] mapperLocations; private DataSource dataSource; private TransactionFactory transactionFactory; private Properties configurationProperties; private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder(); private SqlSessionFactory sqlSessionFactory; private String environment = SqlSessionFactoryBean.class.getSimpleName(); private boolean failFast; private Interceptor[] plugins; private TypeHandler<?>[] typeHandlers; private String typeHandlersPackage; private Class<?>[] typeAliases; private String typeAliasesPackage; private DatabaseIdProvider databaseIdProvider = new DefaultDatabaseIdProvider(); /** * Sets the DatabaseIdProvider. * * @since 1.1.0 * @return */ public DatabaseIdProvider getDatabaseIdProvider() { return databaseIdProvider; } /** * Gets the DatabaseIdProvider * * @since 1.1.0 * @param databaseIdProvider */ public void setDatabaseIdProvider(DatabaseIdProvider databaseIdProvider) { this.databaseIdProvider = databaseIdProvider; } /** * Mybatis plugin list. * * @since 1.0.1 * * @param plugins * list of plugins * */ public void setPlugins(Interceptor[] plugins) { this.plugins = plugins; } /** * Packages to search for type aliases. * * @since 1.0.1 * * @param typeAliasesPackage * package to scan for domain objects * */ public void setTypeAliasesPackage(String typeAliasesPackage) { this.typeAliasesPackage = typeAliasesPackage; } /** * Packages to search for type handlers. * * @since 1.0.1 * * @param typeHandlersPackage * package to scan for type handlers * */ public void setTypeHandlersPackage(String typeHandlersPackage) { this.typeHandlersPackage = typeHandlersPackage; } /** * Set type handlers. They must be annotated with {@code MappedTypes} and * optionally with {@code MappedJdbcTypes} * * @since 1.0.1 * * @param typeHandlers * Type handler list */ public void setTypeHandlers(TypeHandler<?>[] typeHandlers) { this.typeHandlers = typeHandlers; } /** * List of type aliases to register. They can be annotated with * {@code Alias} * * @since 1.0.1 * * @param typeAliases * Type aliases list */ public void setTypeAliases(Class<?>[] typeAliases) { this.typeAliases = typeAliases; } /** * If true, a final check is done on Configuration to assure that all mapped * statements are fully loaded and there is no one still pending to resolve * includes. Defaults to false. * * @since 1.0.1 * * @param failFast * enable failFast */ public void setFailFast(boolean failFast) { this.failFast = failFast; } /** * Set the location of the MyBatis {@code SqlSessionFactory} config file. A * typical value is "WEB-INF/mybatis-configuration.xml". */ public void setConfigLocation(Resource configLocation) { this.configLocation = configLocation; } /** * Set locations of MyBatis mapper files that are going to be merged into * the {@code SqlSessionFactory} configuration at runtime. * * This is an alternative to specifying "<sqlmapper>" entries in an * MyBatis config file. This property being based on Spring's resource * abstraction also allows for specifying resource patterns here: e.g. * "classpath*:sqlmap/*-mapper.xml". */ public void setMapperLocations(Resource[] mapperLocations) { this.mapperLocations = mapperLocations; } /** * Set optional properties to be passed into the SqlSession configuration, * as alternative to a {@code <properties>} tag in the configuration * xml file. This will be used to resolve placeholders in the config file. */ public void setConfigurationProperties(Properties sqlSessionFactoryProperties) { this.configurationProperties = sqlSessionFactoryProperties; } /** * Set the JDBC {@code DataSource} that this instance should manage * transactions for. The {@code DataSource} should match the one used by the * {@code SqlSessionFactory}: for example, you could specify the same JNDI * DataSource for both. * * A transactional JDBC {@code Connection} for this {@code DataSource} will * be provided to application code accessing this {@code DataSource} * directly via {@code DataSourceUtils} or * {@code DataSourceTransactionManager}. * * The {@code DataSource} specified here should be the target * {@code DataSource} to manage transactions for, not a * {@code TransactionAwareDataSourceProxy}. Only data access code may work * with {@code TransactionAwareDataSourceProxy}, while the transaction * manager needs to work on the underlying target {@code DataSource}. If * there's nevertheless a {@code TransactionAwareDataSourceProxy} passed in, * it will be unwrapped to extract its target {@code DataSource}. * */ public void setDataSource(DataSource dataSource) { if (dataSource instanceof TransactionAwareDataSourceProxy) { // If we got a TransactionAwareDataSourceProxy, we need to perform // transactions for its underlying target DataSource, else data // access code won't see properly exposed transactions (i.e. // transactions for the target DataSource). this.dataSource = ((TransactionAwareDataSourceProxy) dataSource).getTargetDataSource(); } else { this.dataSource = dataSource; } } /** * Sets the {@code SqlSessionFactoryBuilder} to use when creating the * {@code SqlSessionFactory}. * * This is mainly meant for testing so that mock SqlSessionFactory classes * can be injected. By default, {@code SqlSessionFactoryBuilder} creates * {@code DefaultSqlSessionFactory} instances. * */ public void setSqlSessionFactoryBuilder(SqlSessionFactoryBuilder sqlSessionFactoryBuilder) { this.sqlSessionFactoryBuilder = sqlSessionFactoryBuilder; } /** * Set the MyBatis TransactionFactory to use. Default is * {@code SpringManagedTransactionFactory} * * The default {@code SpringManagedTransactionFactory} should be appropriate * for all cases: be it Spring transaction management, EJB CMT or plain JTA. * If there is no active transaction, SqlSession operations will execute SQL * statements non-transactionally. * * <b>It is strongly recommended to use the default * {@code TransactionFactory}.</b> If not used, any attempt at getting an * SqlSession through Spring's MyBatis framework will throw an exception if * a transaction is active. * * @see SpringManagedTransactionFactory * @param transactionFactory * the MyBatis TransactionFactory */ public void setTransactionFactory(TransactionFactory transactionFactory) { this.transactionFactory = transactionFactory; } /** * <b>NOTE:</b> This class <em>overrides</em> any {@code Environment} you * have set in the MyBatis config file. This is used only as a placeholder * name. The default value is * {@code SqlSessionFactoryBean.class.getSimpleName()}. * * @param environment * the environment name */ public void setEnvironment(String environment) { this.environment = environment; } /** * {@inheritDoc} */ public void afterPropertiesSet() throws Exception { notNull(dataSource, "Property 'dataSource' is required"); notNull(sqlSessionFactoryBuilder, "Property 'sqlSessionFactoryBuilder' is required"); this.sqlSessionFactory = buildSqlSessionFactory(); } /** * Build a {@code SqlSessionFactory} instance. * * The default implementation uses the standard MyBatis * {@code XMLConfigBuilder} API to build a {@code SqlSessionFactory} * instance based on an Reader. * * @return SqlSessionFactory * @throws IOException * if loading the config file failed */ protected SqlSessionFactory buildSqlSessionFactory() throws IOException { Configuration configuration; XMLConfigBuilder xmlConfigBuilder = null; if (this.configLocation != null) { xmlConfigBuilder = new XMLConfigBuilder(this.configLocation.getInputStream(), null, this.configurationProperties); configuration = xmlConfigBuilder.getConfiguration(); } else { if (this.logger.isDebugEnabled()) { this.logger.debug("Property 'configLocation' not specified, using default MyBatis Configuration"); } configuration = new Configuration(); configuration.setVariables(this.configurationProperties); } if (hasLength(this.typeAliasesPackage)) { String[] typeAliasPackageArray = tokenizeToStringArray(this.typeAliasesPackage, ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS); /* * ?typeAliasPackageArray??? * * @author wangmb * * @date 2012-08-22 */ typeAliasPackageArray = new Scanner().doScan(typeAliasPackageArray); for (String packageToScan : typeAliasPackageArray) { configuration.getTypeAliasRegistry().registerAliases(packageToScan); if (this.logger.isDebugEnabled()) { this.logger.debug("Scanned package: '" + packageToScan + "' for aliases"); } } } if (!isEmpty(this.typeAliases)) { for (Class<?> typeAlias : this.typeAliases) { configuration.getTypeAliasRegistry().registerAlias(typeAlias); if (this.logger.isDebugEnabled()) { this.logger.debug("Registered type alias: '" + typeAlias + "'"); } } } if (!isEmpty(this.plugins)) { for (Interceptor plugin : this.plugins) { configuration.addInterceptor(plugin); if (this.logger.isDebugEnabled()) { this.logger.debug("Registered plugin: '" + plugin + "'"); } } } if (hasLength(this.typeHandlersPackage)) { String[] typeHandlersPackageArray = tokenizeToStringArray(this.typeHandlersPackage, ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS); for (String packageToScan : typeHandlersPackageArray) { configuration.getTypeHandlerRegistry().register(packageToScan); if (this.logger.isDebugEnabled()) { this.logger.debug("Scanned package: '" + packageToScan + "' for type handlers"); } } } if (!isEmpty(this.typeHandlers)) { for (TypeHandler<?> typeHandler : this.typeHandlers) { configuration.getTypeHandlerRegistry().register(typeHandler); if (this.logger.isDebugEnabled()) { this.logger.debug("Registered type handler: '" + typeHandler + "'"); } } } if (xmlConfigBuilder != null) { try { xmlConfigBuilder.parse(); if (this.logger.isDebugEnabled()) { this.logger.debug("Parsed configuration file: '" + this.configLocation + "'"); } } catch (Exception ex) { throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex); } finally { ErrorContext.instance().reset(); } } if (this.transactionFactory == null) { this.transactionFactory = new SpringManagedTransactionFactory(); } Environment environment = new Environment(this.environment, this.transactionFactory, this.dataSource); configuration.setEnvironment(environment); if (this.databaseIdProvider != null) { try { configuration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource)); } catch (SQLException e) { throw new NestedIOException("Failed getting a databaseId", e); } } if (!isEmpty(this.mapperLocations)) { for (Resource mapperLocation : this.mapperLocations) { if (mapperLocation == null) { continue; } try { XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(mapperLocation.getInputStream(), configuration, mapperLocation.toString(), configuration.getSqlFragments()); xmlMapperBuilder.parse(); } catch (Exception e) { throw new NestedIOException("Failed to parse mapping resource: '" + mapperLocation + "'", e); } finally { ErrorContext.instance().reset(); } if (this.logger.isDebugEnabled()) { this.logger.debug("Parsed mapper file: '" + mapperLocation + "'"); } } } else { if (this.logger.isDebugEnabled()) { this.logger.debug("Property 'mapperLocations' was not specified or no matching resources found"); } } return this.sqlSessionFactoryBuilder.build(configuration); } /** * {@inheritDoc} */ public SqlSessionFactory getObject() throws Exception { if (this.sqlSessionFactory == null) { afterPropertiesSet(); } return this.sqlSessionFactory; } /** * {@inheritDoc} */ public Class<? extends SqlSessionFactory> getObjectType() { return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass(); } /** * {@inheritDoc} */ public boolean isSingleton() { return true; } /** * {@inheritDoc} */ public void onApplicationEvent(ApplicationEvent event) { if (failFast && event instanceof ContextRefreshedEvent) { // fail-fast -> check all statements are completed this.sqlSessionFactory.getConfiguration().getMappedStatementNames(); } } private final class Scanner { /* ?? */ protected final ResourcePatternResolver RESOLVER = new PathMatchingResourcePatternResolver(); /* Meta?Reader Factory.MetaReader */ protected final MetadataReaderFactory READER_FACTORY = new SimpleMetadataReaderFactory(); protected String[] doScan(String... as) throws IOException { if (as == null || as.length == 0) throw new NullPointerException("as is null"); List<String> packageList = new ArrayList<String>(); // ??,?typeAliasesPackage String pkg = ""; for (String scanPackage : as) { if (scanPackage.indexOf("*") > 0) { //"classpath*:com/tydic/**/model/*.class" Resource[] resources = RESOLVER .getResources("classpath*:" + scanPackage.replaceAll("\\.", "/") + "/*.class"); for (Resource res : resources) { // MetadataReaderClassMeta?,??? MetadataReader meta = READER_FACTORY.getMetadataReader(res); pkg = meta.getClassMetadata().getClassName(); pkg = pkg.substring(0, pkg.lastIndexOf(".")); packageList.add(pkg); if (logger.isDebugEnabled()) { logger.debug("scanPackage:" + pkg); } } } else { packageList.add(scanPackage); } } //if(!packageList.isEmpty()) removeDuplicateWithOrder(packageList); return packageList.toArray(new String[packageList.size()]); } /** * @Title: removeDuplicateWithOrder * @Description: TODO(list??) * @param packageList void * @author mb.wang wangmb@tydic.com * @date 2012-8-22 ?11:26:24 */ private void removeDuplicateWithOrder(List<String> packageList) { Set<String> set = new HashSet<String>(); List<String> pkgList = new ArrayList<String>(); for (Iterator<String> iter = packageList.iterator(); iter.hasNext();) { String element = iter.next(); if (set.add(element)) pkgList.add(element); } packageList.clear(); packageList.addAll(pkgList); } } }