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package com.github.mybatis.spring;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.BeansException;
import org.springframework.beans.PropertyValue;
import org.springframework.beans.PropertyValues;
import org.springframework.beans.factory.BeanNameAware;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.PropertyResourceConfigurer;
import org.springframework.beans.factory.config.TypedStringValue;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.BeanNameGenerator;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.util.StringUtils;
import java.lang.annotation.Annotation;
import java.util.Map;
import static org.springframework.util.Assert.notNull;
/**
* 定制Mapper，可以做性能统计，由于MapperScannerConfigurer很多属性都没有提供getter，只能把代码拷贝过来了
* Created by lirui on 15/1/7.
*/
public class ScannerConfigurer implements BeanDefinitionRegistryPostProcessor, InitializingBean, ApplicationContextAware, BeanNameAware {
private String basePackage;
private boolean addToConfig = true;
private SqlSessionFactory sqlSessionFactory;
private SqlSessionTemplate sqlSessionTemplate;
private String sqlSessionFactoryBeanName;
private String sqlSessionTemplateBeanName;
private Class annotationClass;
private Class markerInterface;
private ApplicationContext applicationContext;
private String beanName;
private boolean processPropertyPlaceHolders;
private BeanNameGenerator nameGenerator;
/**
* This property lets you set the base package for your mapper interface files.
*
* You can set more than one package by using a semicolon or comma as a separator.
*
* Mappers will be searched for recursively starting in the specified package(s).
*
* @param basePackage base package name
*/
public void setBasePackage(String basePackage) {
this.basePackage = basePackage;
}
/**
* Same as {@code MapperFactoryBean#setAddToConfig(boolean)}.
*
* @param addToConfig
* @see org.mybatis.spring.mapper.MapperFactoryBean#setAddToConfig(boolean)
*/
public void setAddToConfig(boolean addToConfig) {
this.addToConfig = addToConfig;
}
/**
* This property specifies the annotation that the scanner will search for.
*
* The scanner will register all interfaces in the base package that also have the
* specified annotation.
*
* Note this can be combined with markerInterface.
*
* @param annotationClass annotation class
*/
public void setAnnotationClass(Class annotationClass) {
this.annotationClass = annotationClass;
}
/**
* This property specifies the parent that the scanner will search for.
*
* The scanner will register all interfaces in the base package that also have the
* specified interface class as a parent.
*
* Note this can be combined with annotationClass.
*
* @param superClass parent class
*/
public void setMarkerInterface(Class superClass) {
this.markerInterface = superClass;
}
/**
* Specifies which {@code SqlSessionTemplate} to use in the case that there is
* more than one in the spring context. Usually this is only needed when you
* have more than one datasource.
*
* Use {@link #setSqlSessionTemplateBeanName(String)} instead
*
* @param sqlSessionTemplate
*/
@Deprecated
public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
this.sqlSessionTemplate = sqlSessionTemplate;
}
/**
* Specifies which {@code SqlSessionTemplate} to use in the case that there is
* more than one in the spring context. Usually this is only needed when you
* have more than one datasource.
*
* Note bean names are used, not bean references. This is because the scanner
* loads early during the start process and it is too early to build mybatis
* object instances.
*
* @param sqlSessionTemplateName Bean name of the {@code SqlSessionTemplate}
* @since 1.1.0
*/
public void setSqlSessionTemplateBeanName(String sqlSessionTemplateName) {
this.sqlSessionTemplateBeanName = sqlSessionTemplateName;
}
/**
* Specifies which {@code SqlSessionFactory} to use in the case that there is
* more than one in the spring context. Usually this is only needed when you
* have more than one datasource.
*
* Use {@link #setSqlSessionFactoryBeanName(String)} instead.
*
* @param sqlSessionFactory
*/
@Deprecated
public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
this.sqlSessionFactory = sqlSessionFactory;
}
/**
* Specifies which {@code SqlSessionFactory} to use in the case that there is
* more than one in the spring context. Usually this is only needed when you
* have more than one datasource.
*
* Note bean names are used, not bean references. This is because the scanner
* loads early during the start process and it is too early to build mybatis
* object instances.
*
* @param sqlSessionFactoryName Bean name of the {@code SqlSessionFactory}
* @since 1.1.0
*/
public void setSqlSessionFactoryBeanName(String sqlSessionFactoryName) {
this.sqlSessionFactoryBeanName = sqlSessionFactoryName;
}
/**
* @param processPropertyPlaceHolders
* @since 1.1.1
*/
public void setProcessPropertyPlaceHolders(boolean processPropertyPlaceHolders) {
this.processPropertyPlaceHolders = processPropertyPlaceHolders;
}
/**
* {@inheritDoc}
*/
public void setApplicationContext(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
/**
* {@inheritDoc}
*/
public void setBeanName(String name) {
this.beanName = name;
}
/**
* Gets beanNameGenerator to be used while running the scanner.
*
* @return the beanNameGenerator BeanNameGenerator that has been configured
* @since 1.2.0
*/
public BeanNameGenerator getNameGenerator() {
return nameGenerator;
}
/**
* Sets beanNameGenerator to be used while running the scanner.
*
* @param nameGenerator the beanNameGenerator to set
* @since 1.2.0
*/
public void setNameGenerator(BeanNameGenerator nameGenerator) {
this.nameGenerator = nameGenerator;
}
/**
* {@inheritDoc}
*/
public void afterPropertiesSet() throws Exception {
notNull(this.basePackage, "Property 'basePackage' is required");
}
/**
* {@inheritDoc}
*/
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
// left intentionally blank
}
/**
* {@inheritDoc}
*
* @since 1.0.2
*/
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
if (this.processPropertyPlaceHolders) {
processPropertyPlaceHolders();
}
ClassPathMapperScanner scanner = new ClassPathMapperScanner(registry);
scanner.setAddToConfig(this.addToConfig);
scanner.setAnnotationClass(this.annotationClass);
scanner.setMarkerInterface(this.markerInterface);
scanner.setSqlSessionFactory(this.sqlSessionFactory);
scanner.setSqlSessionTemplate(this.sqlSessionTemplate);
scanner.setSqlSessionFactoryBeanName(this.sqlSessionFactoryBeanName);
scanner.setSqlSessionTemplateBeanName(this.sqlSessionTemplateBeanName);
scanner.setResourceLoader(this.applicationContext);
scanner.setBeanNameGenerator(this.nameGenerator);
scanner.registerFilters();
scanner.scan(StringUtils.tokenizeToStringArray(this.basePackage, ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS));
}
/*
* BeanDefinitionRegistries are called early in application startup, before
* BeanFactoryPostProcessors. This means that PropertyResourceConfigurers will not have been
* loaded and any property substitution of this class' properties will fail. To avoid this, find
* any PropertyResourceConfigurers defined in the context and run them on this class' bean
* definition. Then update the values.
*/
private void processPropertyPlaceHolders() {
Map prcs = applicationContext.getBeansOfType(PropertyResourceConfigurer.class);
if (!prcs.isEmpty() && applicationContext instanceof GenericApplicationContext) {
BeanDefinition mapperScannerBean = ((GenericApplicationContext) applicationContext).getBeanFactory().getBeanDefinition(beanName);
// PropertyResourceConfigurer does not expose any methods to explicitly perform
// property placeholder substitution. Instead, create a BeanFactory that just
// contains this mapper scanner and post process the factory.
DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
factory.registerBeanDefinition(beanName, mapperScannerBean);
for (PropertyResourceConfigurer prc : prcs.values()) {
prc.postProcessBeanFactory(factory);
}
PropertyValues values = mapperScannerBean.getPropertyValues();
this.basePackage = updatePropertyValue("basePackage", values);
this.sqlSessionFactoryBeanName = updatePropertyValue("sqlSessionFactoryBeanName", values);
this.sqlSessionTemplateBeanName = updatePropertyValue("sqlSessionTemplateBeanName", values);
}
}
private String updatePropertyValue(String propertyName, PropertyValues values) {
PropertyValue property = values.getPropertyValue(propertyName);
if (property == null) {
return null;
}
Object value = property.getValue();
if (value == null) {
return null;
} else if (value instanceof String) {
return value.toString();
} else if (value instanceof TypedStringValue) {
return ((TypedStringValue) value).getValue();
} else {
return null;
}
}
}