spring中mybatis双数据源配置

一、spring双数据源问题

1:配置的两个数据源对于使用的mapper.xml的扫描是需要分开文件夹的,我一个会员,一个代金券的,当我把这两个相关的xml放在同一个目录下,然后两个数据源都加载这个目录,此时,我测试报错,如下:

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.mouse.mbr.mapper.voucher.VoucherMapper.queryVoucherId
    at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)
    at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)
    at com.sun.proxy.$Proxy12.queryVoucherId(Unknown Source)
    at com.mouse.mbr.service.impl.VoucherServiceImpl.queryVoucherId(VoucherServiceImpl.java:28)
    at com.mouse.mbr.controller.VoucherController.getVoucherId(VoucherController.java:23)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2466)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2455)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
2016-12-02 17:26:11 [ http-apr-8080-exec-2:5417 ] - [ DEBUG ] Returning cached instance of singleton bean 'sqlSessionFactoryMbr'
2016-12-02 17:26:11 [ http-apr-8080-exec-2:5417 ] - [ DEBUG ] Returning cached instance of singleton bean 'sqlSessionFactoryVoucher'
十二月 02, 2016 5:26:11 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [SpringMVC] in context with path [/api] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.mangocity.mbr.mapper.voucher.VoucherMapper.queryVoucherId] with root cause
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.mouse.mbr.mapper.voucher.VoucherMapper.queryVoucherId
    at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)
    at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)
    at com.sun.proxy.$Proxy12.queryVoucherId(Unknown Source)
    at com.mouse.mbr.service.impl.VoucherServiceImpl.queryVoucherId(VoucherServiceImpl.java:28)
    at com.mouse.mbr.controller.VoucherController.getVoucherId(VoucherController.java:23)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2466)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2455)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

说的很直白的就是找不到对应的sql,最后我把代金券和人员分开建立了两个文件夹为voucher和mbr,然后分开指定,就好了。

二、配置代码如下

       <bean id="sqlSessionFactoryMember" class="org.mybatis.spring.SqlSessionFactoryBean">
              <property name="dataSource" ref="dataSourceMbr" />
              <!-- 自动扫描mapping.xml文件 -->
              <property name="mapperLocations">
                    <list>
                        <value>classpath*:mapper/mbr/*.xml</value>
                                <value>classpath*:mapper/point/*.xml</value>
                    </list>
              </property>
       </bean>
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
              <property name="basePackage" value="com.mouse.mbr.mapper,com.mouse.point.mapper" />
              <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryMember"></property>
       </bean> 
       <!--  -->
       <bean id="sqlSessionFactoryVoucher" class="org.mybatis.spring.SqlSessionFactoryBean">
              <property name="dataSource" ref="dataSourceVoucher" />
              <!-- 自动扫描mapping.xml文件 -->
              <property name="mapperLocations" value="classpath*:mapper/voucher/*.xml"></property>
       </bean>
       <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
              <property name="basePackage" value="com.mouse.voucher.mapper" />
              <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryVoucher"></property>
       </bean>

这里涉及到系统模块拆分,所以可以加载多个详细路径下的xml。
扫描的时候可以扫描多个包,MapperScannerConfigurer源码解析如下:

Image.png

对于双数据源,现在自己配置过一次才知道,其实还是类似dao层在查询时候根据不同的注入操作数据。所以让我想到对于每个数据源,我可以配置一个只读的,一个用来做修改更新操作的,即是读写分离的模式。按照我的理解那就是配置的只读的数据源,就是单纯的用来查询的,那么可以说对于同一个模块,比如说会员,查询等只读的操作用只读的数据源。而删除更新等写的模式就用写的数据源来进行处理。

三、计划

其实很久没有写文章了,近期会陆续把之前还有最近的笔记整理下。

                                 __                                                        
                   __  _  ____ __|  |__ _____    ___
                   \ \/ \/ /  |  \  |  \\__  \  /  _ \   
                    \     /|  |  /   Y  \/ __ \(  <_> )
                     \/\_/ |____/|___|  (____  /\____/ 
                                      \/     \/          
走在自己的路上,遇到要遇到的人,经历要经历的事,这才是我们需要面对的。努力,come on!!!
                                                        公元2016年12月6号
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