Lastme-Nothing is impossible

在 SpringMVC 中扩展MyBatis 的 SqlSessionFactoryBean使其支持 Apache Ant 路径匹配的TypeAliases 配置方式

God
October 9, 2015
0
Spring MVC

软件包环境: mybatis-spring-1.2.3.jar mybatis-3.3.0.jar spring webmvc 4.1.6 MyBatis 的别名配置文件入口只有能有一个，而且必须写在这个文件或者添加包的扫描路径然后使用注解，很难维护，要想web项目模块间的依赖，维护更是十分困难。所以重写了SqlSessionFactoryBean. 中间的很多代码是直接复制MyBatis 的 SqlSessionFactoryBean类的源码,然后添加自己的扩展代码,整合MyBatis和SpringMVC的时候,配置文件中只需要这样配置就可以了,

<bean id="sqlSessionFactory" class="com.kernelstudio.vendor.component.mybatis.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <!-- Mapper映射配置 -->
    <property name="mapperLocations" value="classpath*:com/kernelstudio/app/bundle/*/resource/mybatis/mapper/*.xml" />
    <!-- 别名配置扫描路径 -->
    <property name="antTypeAliasesLocations" value="classpath*:com/kernelstudio/app/bundle/*/resource/mybatis/*aliases.xml" />
</bean>

下面的截图是我项目中的代码目录结构,bundle下面的都是按模块划分, 直接上代码:

package com.kernelstudio.vendor.component.mybatis;

/**
 * 
 * This file is part of the KernelStudio package.
 * 
 * (c) 2015 kernelstudio <developer@kernelstudio.com>
 * 
 * For the full copyright and license information, please view the LICENSE file
 * that was distributed with this source code.
 * 
 * @author zhoulin < developer@kernelstudio.com >
 * @link http://www.kernelstudio.com
 * @version 0.1
 * @since 0.1
 */
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.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;

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.Environment;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
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.TypeAliasRegistry;
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.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.
 * 
 * @author Putthibong Boonbong
 * @author Hunter Presnall
 * @author Eduardo Macarron
 * 
 * @see #setConfigLocation
 * @see #setDataSource
 * @version $Id$
 */
public class SqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent>
{

    private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);
    private Resource configLocation;
    private Resource[] mapperLocations;
    private DataSource dataSource;
    private TransactionFactory transactionFactory;
    private Properties configurationProperties;
    private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
    private SqlSessionFactory sqlSessionFactory;
    // EnvironmentAware requires spring 3.1
    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 Class<?> typeAliasesSuperType;
    // issue #19. No default provider.
    private DatabaseIdProvider databaseIdProvider;
    private ObjectFactory objectFactory;
    private ObjectWrapperFactory objectWrapperFactory;
    private String antTypeAliasesLocations;
    private Map<String, Class<?>> antTypeAliasesMap;
    
    /**
     * 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 (LOGGER.isDebugEnabled()) {
                LOGGER.debug("Property 'configLocation' not specified, using default MyBatis Configuration");
            }
            configuration = new Configuration();
            configuration.setVariables(this.configurationProperties);
        }
    
        if (this.objectFactory != null) {
            configuration.setObjectFactory(this.objectFactory);
        }
    
        if (this.objectWrapperFactory != null) {
            configuration.setObjectWrapperFactory(this.objectWrapperFactory);
        }
    
        if (hasLength(this.typeAliasesPackage)) {
            String[] typeAliasPackageArray = tokenizeToStringArray(this.typeAliasesPackage, ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
            for (String packageToScan : typeAliasPackageArray) {
                configuration.getTypeAliasRegistry().registerAliases(packageToScan, typeAliasesSuperType == null ? Object.class : typeAliasesSuperType);
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Scanned package: '" + packageToScan + "' for aliases");
                }
            }
        }
    
        // 扩展ant风格的别名配置
        buildAntTypeAliasesPackage(configuration);
        if (null != this.antTypeAliasesMap && !this.antTypeAliasesMap.isEmpty()) {
            for (Entry<String, Class<?>> typeAlias : this.antTypeAliasesMap.entrySet()) {
                configuration.getTypeAliasRegistry().registerAlias(typeAlias.getKey(), typeAlias.getValue());
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Registered ant type alias: '" + typeAlias.getKey() + "[" + typeAlias.getValue().getName() + "]" + "'");
                }
            }
        }
        // end
    
        if (!isEmpty(this.typeAliases)) {
            for (Class<?> typeAlias : this.typeAliases) {
                configuration.getTypeAliasRegistry().registerAlias(typeAlias);
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Registered type alias: '" + typeAlias + "'");
                }
            }
        }
    
        if (!isEmpty(this.plugins)) {
            for (Interceptor plugin : this.plugins) {
                configuration.addInterceptor(plugin);
                if (LOGGER.isDebugEnabled()) {
                    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 (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Scanned package: '" + packageToScan + "' for type handlers");
                }
            }
        }
    
        if (!isEmpty(this.typeHandlers)) {
            for (TypeHandler<?> typeHandler : this.typeHandlers) {
                configuration.getTypeHandlerRegistry().register(typeHandler);
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Registered type handler: '" + typeHandler + "'");
                }
            }
        }
    
        // fix #64 set databaseId before
        if (this.databaseIdProvider != null) {
            // parse mapper xmls
            try {
                configuration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));
            } catch (SQLException e) {
                throw new NestedIOException("Failed getting a databaseId", e);
            }
        }
    
        if (xmlConfigBuilder != null) {
            try {
                xmlConfigBuilder.parse();
    
                if (LOGGER.isDebugEnabled()) {
                    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();
        }
    
        configuration.setEnvironment(new Environment(this.environment, this.transactionFactory, this.dataSource));
    
        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 (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Parsed mapper file: '" + mapperLocation + "'");
                }
            }
        } else {
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("Property 'mapperLocations' was not specified or no matching resources found");
            }
        }
    
        return this.sqlSessionFactoryBuilder.build(configuration);
    }
    
    /**
     * 
     * @param configuration
     * @throws IOException
     */
    private Map<String, Class<?>> buildAntTypeAliasesPackage(Configuration configuration) throws IOException
    {
        if (antTypeAliasesLocations != null) {
            Configuration aliasesConfiguration = null;
            XMLConfigBuilder xmlConfigBuilder = null;
            ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
            antTypeAliasesMap = new HashMap<String, Class<?>>();
            String[] aliasesPackages = antTypeAliasesLocations.split(",");
            for (int i = 0; i < aliasesPackages.length; i++) {
                String aliases = aliasesPackages[i];
                aliases = (aliases + "").trim();
                LOGGER.debug("Parsed type aliases package file: [" + aliases + "]");
                if (aliases != null && aliases.length() > 0) {
                    Resource[] aliasesLocations = resolver.getResources(aliases);
                    if (!isEmpty(aliasesLocations)) {
                        for (Resource aliasesLocation : aliasesLocations) {
                            if (aliasesLocation == null) {
                                continue;
                            }
                            try {
                                if (aliasesLocation != null) {
                                    xmlConfigBuilder = new XMLConfigBuilder(aliasesLocation.getInputStream(), null, this.configurationProperties);
                                    xmlConfigBuilder.parse();
                                    aliasesConfiguration = xmlConfigBuilder.getConfiguration();
                                }
                                if (null != aliasesConfiguration) {
                                    TypeAliasRegistry aliasesRegistry = aliasesConfiguration.getTypeAliasRegistry();
                                    for (Entry<String, Class<?>> alias : aliasesRegistry.getTypeAliases().entrySet()) {
                                        antTypeAliasesMap.put(alias.getKey(), alias.getValue());
                                    }
    
                                }
                            } catch (Exception e) {
                                throw new NestedIOException("Failed to parse mapping resource: '" + aliasesLocation + "'", e);
                            } finally {
                                ErrorContext.instance().reset();
                            }
                            if (LOGGER.isDebugEnabled()) {
                                LOGGER.debug("Parsed mapper file: '" + aliasesLocation + "'");
                            }
                        }
                    }
                }
            }
        }
        return antTypeAliasesMap;
    }
    
    /**
     * {@inheritDoc}
     */
    @Override
    public SqlSessionFactory getObject() throws Exception
    {
        if (this.sqlSessionFactory == null) {
            afterPropertiesSet();
        }
    
        return this.sqlSessionFactory;
    }
    /**
     * {@inheritDoc}
     */
    @Override
    public Class<? extends SqlSessionFactory> getObjectType()
    {
        return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();
    }
    
    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isSingleton()
    {
        return true;
    }
    
    /**
     * {@inheritDoc}
     */
    @Override
    public void onApplicationEvent(ApplicationEvent event)
    {
        if (failFast && event instanceof ContextRefreshedEvent) {
            // fail-fast -> check all statements are completed
            this.sqlSessionFactory.getConfiguration().getMappedStatementNames();
        }
    }
    
    /**
     * Sets the ObjectFactory.
     * 
     * @since 1.1.2
     * @param objectFactory
     */
    public void setObjectFactory(ObjectFactory objectFactory)
    {
        this.objectFactory = objectFactory;
    }
    
    /**
     * Sets the ObjectWrapperFactory.
     * 
     * @since 1.1.2
     * @param objectWrapperFactory
     */
    public void setObjectWrapperFactory(ObjectWrapperFactory objectWrapperFactory)
    {
        this.objectWrapperFactory = objectWrapperFactory;
    }
    
    /**
     * Gets the DatabaseIdProvider
     * 
     * @since 1.1.0
     * @return
     */
    public DatabaseIdProvider getDatabaseIdProvider()
    {
        return databaseIdProvider;
    }
    
    /**
     * Sets the DatabaseIdProvider. As of version 1.2.2 this variable is not
     * initialized by default.
     * 
     * @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;
    }
    
    /**
     * Super class which domain objects have to extend to have a type alias
     * created. No effect if there is no package to scan configured.
     * 
     * @since 1.1.2
     * 
     * @param typeAliasesSuperType super class for domain objects
     * 
     */
    public void setTypeAliasesSuperType(Class<?> typeAliasesSuperType)
    {
        this.typeAliasesSuperType = typeAliasesSuperType;
    }
    
    /**
     * 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 "&lt;sqlmapper&gt;" 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 &lt;properties&gt;} 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}
     */
    @Override
    public void afterPropertiesSet() throws Exception
    {
        notNull(dataSource, "Property 'dataSource' is required");
        notNull(sqlSessionFactoryBuilder, "Property 'sqlSessionFactoryBuilder' is required");
        this.sqlSessionFactory = buildSqlSessionFactory();
    }
    
    public void setAntTypeAliasesLocations(String antTypeAliasesLocations)
    {
        this.antTypeAliasesLocations = antTypeAliasesLocations;
    }

}

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package com.kernelstudio.vendor.component.mybatis;

/**

* This file is part of the KernelStudio package.

* For the full copyright and license information, please view the LICENSE file

* that was distributed with this source code.

* @author zhoulin < developer@kernelstudio.com >

* @link http://www.kernelstudio.com

* @version 0.1

* @since 0.1

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.HashMap;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Properties;

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.Environment;

import org.apache.ibatis.plugin.Interceptor;

import org.apache.ibatis.reflection.factory.ObjectFactory;

import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;

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.TypeAliasRegistry;

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.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.

* @author Putthibong Boonbong

* @author Hunter Presnall

* @author Eduardo Macarron

* @see #setConfigLocation

* @see #setDataSource

* @version $Id$

public class SqlSessionFactoryBean implements FactoryBean, InitializingBean, ApplicationListener

{

private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);

private Resource configLocation;

private Resource[] mapperLocations;

private DataSource dataSource;

private TransactionFactory transactionFactory;

private Properties configurationProperties;

private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();

private SqlSessionFactory sqlSessionFactory;

// EnvironmentAware requires spring 3.1

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 Class typeAliasesSuperType;

// issue #19. No default provider.

private DatabaseIdProvider databaseIdProvider;

private ObjectFactory objectFactory;

private ObjectWrapperFactory objectWrapperFactory;

private String antTypeAliasesLocations;

private Map> antTypeAliasesMap;

/**

* 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 (LOGGER.isDebugEnabled()) {

LOGGER.debug("Property 'configLocation' not specified, using default MyBatis Configuration");

}

configuration = new Configuration();

configuration.setVariables(this.configurationProperties);

}

if (this.objectFactory != null) {

configuration.setObjectFactory(this.objectFactory);

}

if (this.objectWrapperFactory != null) {

configuration.setObjectWrapperFactory(this.objectWrapperFactory);

}

if (hasLength(this.typeAliasesPackage)) {

String[] typeAliasPackageArray = tokenizeToStringArray(this.typeAliasesPackage, ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);

for (String packageToScan : typeAliasPackageArray) {

configuration.getTypeAliasRegistry().registerAliases(packageToScan, typeAliasesSuperType == null ? Object.class : typeAliasesSuperType);

if (LOGGER.isDebugEnabled()) {

LOGGER.debug("Scanned package: '" + packageToScan + "' for aliases");

}

// 扩展ant风格的别名配置

buildAntTypeAliasesPackage(configuration);

if (null != this.antTypeAliasesMap && !this.antTypeAliasesMap.isEmpty()) {

for (Entry> typeAlias : this.antTypeAliasesMap.entrySet()) {

configuration.getTypeAliasRegistry().registerAlias(typeAlias.getKey(), typeAlias.getValue());

if (LOGGER.isDebugEnabled()) {

LOGGER.debug("Registered ant type alias: '" + typeAlias.getKey() + "[" + typeAlias.getValue().getName() + "]" + "'");

}

// end

if (!isEmpty(this.typeAliases)) {

for (Class typeAlias : this.typeAliases) {

configuration.getTypeAliasRegistry().registerAlias(typeAlias);

if (LOGGER.isDebugEnabled()) {

LOGGER.debug("Registered type alias: '" + typeAlias + "'");

}

if (!isEmpty(this.plugins)) {

for (Interceptor plugin : this.plugins) {

configuration.addInterceptor(plugin);

if (LOGGER.isDebugEnabled()) {

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 (LOGGER.isDebugEnabled()) {

LOGGER.debug("Scanned package: '" + packageToScan + "' for type handlers");

}

if (!isEmpty(this.typeHandlers)) {

for (TypeHandler typeHandler : this.typeHandlers) {

configuration.getTypeHandlerRegistry().register(typeHandler);

if (LOGGER.isDebugEnabled()) {

LOGGER.debug("Registered type handler: '" + typeHandler + "'");

}

// fix #64 set databaseId before

if (this.databaseIdProvider != null) {

// parse mapper xmls

try {

configuration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));

} catch (SQLException e) {

throw new NestedIOException("Failed getting a databaseId", e);

}

if (xmlConfigBuilder != null) {

try {

xmlConfigBuilder.parse();

if (LOGGER.isDebugEnabled()) {

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();

}

configuration.setEnvironment(new Environment(this.environment, this.transactionFactory, this.dataSource));

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 (LOGGER.isDebugEnabled()) {

LOGGER.debug("Parsed mapper file: '" + mapperLocation + "'");

}

} else {

if (LOGGER.isDebugEnabled()) {

LOGGER.debug("Property 'mapperLocations' was not specified or no matching resources found");

}

return this.sqlSessionFactoryBuilder.build(configuration);

}

/**

* @param configuration

* @throws IOException

private Map> buildAntTypeAliasesPackage(Configuration configuration) throws IOException

{

if (antTypeAliasesLocations != null) {

Configuration aliasesConfiguration = null;

XMLConfigBuilder xmlConfigBuilder = null;

ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

antTypeAliasesMap = new HashMap>();

String[] aliasesPackages = antTypeAliasesLocations.split(",");

for (int i = 0; i < aliasesPackages.length; i++) {

String aliases = aliasesPackages[i];

aliases = (aliases + "").trim();

LOGGER.debug("Parsed type aliases package file: [" + aliases + "]");

if (aliases != null && aliases.length() > 0) {

Resource[] aliasesLocations = resolver.getResources(aliases);

if (!isEmpty(aliasesLocations)) {

for (Resource aliasesLocation : aliasesLocations) {

if (aliasesLocation == null) {

continue;

}

try {

if (aliasesLocation != null) {

xmlConfigBuilder = new XMLConfigBuilder(aliasesLocation.getInputStream(), null, this.configurationProperties);

xmlConfigBuilder.parse();

aliasesConfiguration = xmlConfigBuilder.getConfiguration();

}

if (null != aliasesConfiguration) {

TypeAliasRegistry aliasesRegistry = aliasesConfiguration.getTypeAliasRegistry();

for (Entry> alias : aliasesRegistry.getTypeAliases().entrySet()) {

antTypeAliasesMap.put(alias.getKey(), alias.getValue());

}

} catch (Exception e) {

throw new NestedIOException("Failed to parse mapping resource: '" + aliasesLocation + "'", e);

} finally {

ErrorContext.instance().reset();

}

if (LOGGER.isDebugEnabled()) {

LOGGER.debug("Parsed mapper file: '" + aliasesLocation + "'");

}

return antTypeAliasesMap;

}

/**

* {@inheritDoc}

@Override

public SqlSessionFactory getObject() throws Exception

{

if (this.sqlSessionFactory == null) {

afterPropertiesSet();

}

return this.sqlSessionFactory;

}

/**

* {@inheritDoc}

@Override

public Class getObjectType()

{

return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();

}

/**

* {@inheritDoc}

@Override

public boolean isSingleton()

{

return true;

}

/**

* {@inheritDoc}

@Override

public void onApplicationEvent(ApplicationEvent event)

{

if (failFast && event instanceof ContextRefreshedEvent) {

// fail-fast -> check all statements are completed

this.sqlSessionFactory.getConfiguration().getMappedStatementNames();

}

/**

* Sets the ObjectFactory.

* @since 1.1.2

* @param objectFactory

public void setObjectFactory(ObjectFactory objectFactory)

{

this.objectFactory = objectFactory;

}

/**

* Sets the ObjectWrapperFactory.

* @since 1.1.2

* @param objectWrapperFactory

public void setObjectWrapperFactory(ObjectWrapperFactory objectWrapperFactory)

{

this.objectWrapperFactory = objectWrapperFactory;

}

/**

* Gets the DatabaseIdProvider

* @since 1.1.0

* @return

public DatabaseIdProvider getDatabaseIdProvider()

{

return databaseIdProvider;

}

/**

* Sets the DatabaseIdProvider. As of version 1.2.2 this variable is not

* initialized by default.

* @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;

}

/**

* Super class which domain objects have to extend to have a type alias

* created. No effect if there is no package to scan configured.

* @since 1.1.2

* @param typeAliasesSuperType super class for domain objects

public void setTypeAliasesSuperType(Class typeAliasesSuperType)

{

this.typeAliasesSuperType = typeAliasesSuperType;

}

/**

* 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.

* It is strongly recommended to use the default

* {@code TransactionFactory}. 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;

}

/**

* NOTE: This class overrides 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}

@Override

public void afterPropertiesSet() throws Exception

{

notNull(dataSource, "Property 'dataSource' is required");

notNull(sqlSessionFactoryBuilder, "Property 'sqlSessionFactoryBuilder' is required");

this.sqlSessionFactory = buildSqlSessionFactory();

}

public void setAntTypeAliasesLocations(String antTypeAliasesLocations)

{

this.antTypeAliasesLocations = antTypeAliasesLocations;

}

Lastme

在 SpringMVC 中扩展MyBatis 的 SqlSessionFactoryBean使其支持 Apache Ant 路径匹配的TypeAliases 配置方式

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