2019-04-09 SpringBoot+Druid+MyBatis+Atomikos 的多数据源配置

前面部分是网上找的，我按照网上写的把自己搭建的过程展示一次

1.引入依赖

目前项目本来使用到了Mybatis plus（在自己的Mapper接口中继承BaseMapper获得基本的CRUD，而不需要增加MapperXML配置） 所以已经引入了依赖，同时使用到Druid和Atomikos，因此依赖如下

　　　　<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.9</version>
        </dependency>

        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-jta-atomikos</artifactId>
        </dependency>

        <!-- mybatis-plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.7.1</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.0.7.1</version>
        </dependency>

2. 修改配置文件application.properties配置数据源属性配置,如果使用profiles，则去当前active中进行配置

spring.datasource.system.xa-properties.url=jdbc:mysql://localhost:3306/easyweb-shiro?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&rewriteBatchedStatements=true
spring.datasource.system.xa-properties.username=root
spring.datasource.system.xa-properties.password=x5
spring.datasource.system.xa-data-source-class-name=com.alibaba.druid.pool.xa.DruidXADataSource
spring.datasource.system.unique-resource-name=systemDataSource

其中spring.datasource.system是安全属性的前缀，可以自行命名

3.在SpringBoot入口类所能扫描到的路径下增加配置类（多个数据源就增加多套配置Bean）

package com.wf.ew.common.config.datasource;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import com.atomikos.jdbc.AtomikosDataSourceBean;

@Configuration
@MapperScan(basePackages = "com.wf.ew.system.dao", sqlSessionTemplateRef = "systemSqlSessionTemplate") // 指定Mapper接口类包使用的sqlSession
public class SystemConfig {

    @Bean(name="systemDataSource")
    @Primary
    @ConfigurationProperties(prefix = "spring.datasource.system") // 安全属性前缀
    public DataSource dataSource() {
        AtomikosDataSourceBean datasource = new AtomikosDataSourceBean();
        System.out.println(datasource);
        return datasource;
    }

    @Bean(name="systemSqlSessionFactory")
    @Primary
    public SqlSessionFactory sqlSessionFactory(@Qualifier("systemDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/**/*Mapper.xml"));// 扫描指定目录的xml
        return bean.getObject();
    }

    @Bean(name="systemTransactionManager")
    @Primary
    public DataSourceTransactionManager transactionManager(@Qualifier("systemDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name="systemSqlSessionTemplate")
    @Primary
    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("systemSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

4. 配置分布式事务

package com.wf.ew.common.config.datasource;

import javax.transaction.TransactionManager;
import javax.transaction.UserTransaction;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.jta.JtaTransactionManager;

import com.atomikos.icatch.jta.UserTransactionImp;
import com.atomikos.icatch.jta.UserTransactionManager;

@Configuration
public class TransactionManagerConfig {

    @Bean
    public UserTransaction userTransaction() throws Throwable {
        UserTransactionImp userTransactionImp = new UserTransactionImp();
        userTransactionImp.setTransactionTimeout(10000);
        return userTransactionImp;
    }

    @Bean
    public TransactionManager atomikosTransactionManager() throws Throwable {
        UserTransactionManager userTransactionManager = new UserTransactionManager();
        userTransactionManager.setForceShutdown(false);
        return userTransactionManager;
    }

    @Bean
    @DependsOn({ "userTransaction", "atomikosTransactionManager" })
    public PlatformTransactionManager transactionManager() throws Throwable {
        JtaTransactionManager manager = new JtaTransactionManager(userTransaction(), atomikosTransactionManager());
        return manager;
    }
}

5.使用事务时，可以采用以下方式来选择使用不同的事务

@Transactional("transactionManager")

transactionManager为分布式事务，systemTransactionManager为数据源事务，名字参考Bean命名

以上为按照别人帖子进行的配置，但当我运行时候报错

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.wf.ew.system.dao.LoginRecordMapper.insert
    at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:)
    at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:)
    at com.sun.proxy.$Proxy164.insert(Unknown Source)
    at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.save(ServiceImpl.java:)
    at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:)
    at com.alibaba.druid.support.spring.stat.DruidStatInterceptor.invoke(DruidStatInterceptor.java:)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:)
    at com.wf.ew.system.service.impl.LoginRecordServiceImpl$$EnhancerBySpringCGLIB$$ad70ce8c.save(<generated>)
    at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:)
    at com.alibaba.druid.support.spring.stat.DruidStatInterceptor.invoke(DruidStatInterceptor.java:)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:)
    at com.wf.ew.system.service.impl.LoginRecordServiceImpl$$EnhancerBySpringCGLIB$$5843731c.save(<generated>)
    at com.wf.ew.system.controller.MainController.addLoginRecord(MainController.java:)
    at com.wf.ew.system.controller.MainController.doLogin(MainController.java:)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:)
    at java.lang.reflect.Method.invoke(Method.java:)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:)
    at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:)
    at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:)
    at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:)
    at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:)
    at org.apache.shiro.web.servlet.AbstractShiroFilter$.call(AbstractShiroFilter.java:)
    at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:)
    at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:)
    at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:)
    at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:)
    at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:)
    at java.lang.Thread.run(Thread.java:)

大致意思就是在MapperXML里找不到LoginRecordMapper.insert

因为insert是通过继承BaseMapper得到的，因此实际上LoginRecordMapper.XML里面是没有id=insert的配置的；解决的方法就是配置session工厂时采用MybatisSqlSessionFactoryBean，而不是SqlSessionFactoryBean

@Bean(name="systemSqlSessionFactory")
    @Primary
    public SqlSessionFactory sqlSessionFactory(@Qualifier("systemDataSource") DataSource dataSource) throws Exception {
        //SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/**/*Mapper.xml"));// 扫描指定目录的xml
        return bean.getObject();
    }

红色部分为修改后的，注释为修改前的。

至此分布式数据源就弄好了，虽然还没来得及测试，但是配置上多数据源之后，能跟以前没配置的一样能登陆进行系统了。

总结：

当发现错误描述有点莫名其妙的时候（明明接口没有insert，所以xml也不需要写insert），看看是不是继承了什么类，去查看一下父类的代码；当看到父类是包含一堆方法的时候，我还想过怎么除了扫描自己的xml还怎么增加别的地方的xml，在查找BaseMapper说明的过程中，找到了更改session工厂的解决方法。