• Dubbo远程rpc调用MybatisPlus自带的方法引发的几个错误


    架构说明:

      先说下我们项目的大概架构,nacos用作配置和服务注册发现中心。其他微服务在nacos注册,通过Dubbo进行远程调用。

      提前说明,为了方便,我这里讲调用者=消费者,提供者=生产者。

      我这里的消费者,没有其他过多的包类,可以简单理解,只有一个包,包里每个类,对应一个数据库表的维护,操作都是调用生产者提供的服务接口。

    出现的错误一:

    这段代码是在消费这里面写的,需要远程调用scpIcpbussService的list接口

    LambdaQueryWrapper<Icpbuss> wrapper = new LambdaQueryWrapper<>();
                wrapper.select(Icpbuss::getId).eq(Icpbuss::getSOrgCode, item.getSOrgCode())
                        .eq(Icpbuss::getSupplierSystem, item.getSupplierSystem())
                        .eq(Icpbuss::getROrgCode, item.getROrgCode())
                        .eq(Icpbuss::getRequirementSystem, item.getRequirementSystem());
                List<Icpbuss> dataList = IcpbussService.list(wrapper);
    

      运行后,就会报错,如下

    com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: can not find lambda cache for this entity [com.xxx.xxx.basic.entity.xxxIcpbuss]
    com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: can not find lambda cache for this entity [com.xxx.xxx.basic.entity.xxxIcpbuss]
    	at com.baomidou.mybatisplus.core.toolkit.ExceptionUtils.mpe(ExceptionUtils.java:49)
    	at com.baomidou.mybatisplus.core.toolkit.Assert.isTrue(Assert.java:38)
    	at com.baomidou.mybatisplus.core.toolkit.Assert.notNull(Assert.java:72)
    	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.tryInitCache(AbstractLambdaWrapper.java:89)
    	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.getColumnCache(AbstractLambdaWrapper.java:78)
    	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.columnToString(AbstractLambdaWrapper.java:62)
    	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.lambda$columnsToString$0(AbstractLambdaWrapper.java:53)
    	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
    	at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
    	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
    	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
    	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
    	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
    	at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.columnsToString(AbstractLambdaWrapper.java:53)
    	at com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper.select(LambdaQueryWrapper.java:84)
    	at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi.lambda$saveData$2(IcpbussConsumerStrategySpi.java:100)
    	at java.util.ArrayList.forEach(ArrayList.java:1259)
    	at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi.saveData(IcpbussConsumerStrategySpi.java:98)
    	at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi.receive(IcpbussConsumerStrategySpi.java:82)
    	at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi.receive(IcpbussConsumerStrategySpi.java:55)
    	at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi$$FastClassBySpringCGLIB$$f3488070.invoke(<generated>)
    	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:783)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
    	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
    	at com.xxx.xxx.xxx.aspect.xxxAspect.doAroundAdvice(xxxAspect.java:54)
    	at com.xxx.xxx.xxx.aspect.xxxAspect$$FastClassBySpringCGLIB$$8e07f5f5.invoke(<generated>)
    	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
    	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
    	at com.xxx.xxx.xxx.aspect.xxxAspect$$EnhancerBySpringCGLIB$$ddfaddf9.doAroundAdvice(<generated>)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:634)
    	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:624)
    	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:72)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
    	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
    	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
    	at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi$$EnhancerBySpringCGLIB$$7d4ce1e5.receive(<generated>)
    	at com.xxx.xxx.spi.dispatcher.support.DefaultDataOutSpi.receiveProcessor(DefaultDataOutSpi.java:98)
    	at com.xxx.xxx.spi.dispatcher.support.DefaultDataOutSpi.lambda$null$1(DefaultDataOutSpi.java:63)
    	at org.apache.camel.support.processor.DelegateSyncProcessor.process(DelegateSyncProcessor.java:65)
    	at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$RedeliveryTask.doRun(RedeliveryErrorHandler.java:810)
    	at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$RedeliveryTask.run(RedeliveryErrorHandler.java:718)
    	at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:187)
    	at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:64)
    	at org.apache.camel.processor.Pipeline.process(Pipeline.java:184)
    	at org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:398)
    	at org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:83)
    	at org.apache.camel.support.AsyncProcessorSupport.process(AsyncProcessorSupport.java:41)
    	at org.apache.camel.component.rabbitmq.RabbitConsumer.doHandleDelivery(RabbitConsumer.java:109)
    	at org.apache.camel.component.rabbitmq.RabbitConsumer.handleDelivery(RabbitConsumer.java:84)
    	at com.rabbitmq.client.impl.ConsumerDispatcher$5.run(ConsumerDispatcher.java:149)
    	at com.rabbitmq.client.impl.ConsumerWorkService$WorkPoolRunnable.run(ConsumerWorkService.java:104)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    	at java.lang.Thread.run(Thread.java:748)
    

      原因以及解决方法:百度以及自己尝试,发现Dubbo远程调用不支持LambdaQueryWrapper或者QueryWrapper等类型的传递。尽量改用传递实体等,需要构建查询条件的,还是在提供者的实现类里面去使用LambdaQueryWrapper或者QueryWrapper等;还有说法是Mybatis-Plus的版本太低,但是我这里没有尝试。

    如果上面的错误你改了,可以正常运行了,那就不用看下面的错误二了。

    错误二:

      当我改了错误一以后,又出现了这个错误,如下:

      百度到的,都是说没有配置主数据,之类的,但是我去了服务的提供者看配置,是配置的,可以正常使用。这里说明下,我服务的消费着是不需要数据库连接的,全程都是通过Dubbo调用远程服务。

      出现错误代码是:service.saveBatch(dataList); 说明:saveBatch是Mybatis-Plus中Service自带的方法。

    org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is com.baomidou.dynamic.datasource.exception.CannotFindDataSourceException: dynamic-datasource can not find primary datasource
        at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:309)
        at org.springframework.transaction.support.AbstractPlatformTransactionManager.startTransaction(AbstractPlatformTransactionManager.java:400)
        at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:595)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:382)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
        at org.apache.dubbo.common.bytecode.proxy2$$EnhancerBySpringCGLIB$$e170fea3.saveBatch(<generated>)
        at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi.saveData(IcpbussConsumerStrategySpi.java:98)
        at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi.receive(IcpbussConsumerStrategySpi.java:82)
        at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi.receive(IcpbussConsumerStrategySpi.java:55)
        at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi$$FastClassBySpringCGLIB$$f3488070.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:783)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
        at com.xxx.xxx.xxx.aspect.xxxAspect.doAroundAdvice(xxxAspect.java:54)
        at com.xxx.xxx.xxx.aspect.xxxAspect$$FastClassBySpringCGLIB$$8e07f5f5.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
        at com.xxx.xxx.xxx.aspect.xxxAspect$$EnhancerBySpringCGLIB$$f7832c33.doAroundAdvice(<generated>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:634)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:624)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:72)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
        at com.xxx.xxx.xxx.spi.IcpbussConsumerStrategySpi$$EnhancerBySpringCGLIB$$dc9a1d21.receive(<generated>)
        at com.xxx.xxx.spi.dispatcher.support.DefaultDataOutSpi.receiveProcessor(DefaultDataOutSpi.java:98)
        at com.xxx.xxx.spi.dispatcher.support.DefaultDataOutSpi.lambda$null$1(DefaultDataOutSpi.java:63)
        at org.apache.camel.support.processor.DelegateSyncProcessor.process(DelegateSyncProcessor.java:65)
        at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$RedeliveryTask.doRun(RedeliveryErrorHandler.java:810)
        at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$RedeliveryTask.run(RedeliveryErrorHandler.java:718)
        at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:187)
        at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:64)
        at org.apache.camel.processor.Pipeline.process(Pipeline.java:184)
        at org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:398)
        at org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:83)
        at org.apache.camel.support.AsyncProcessorSupport.process(AsyncProcessorSupport.java:41)
        at org.apache.camel.component.rabbitmq.RabbitConsumer.doHandleDelivery(RabbitConsumer.java:109)
        at org.apache.camel.component.rabbitmq.RabbitConsumer.handleDelivery(RabbitConsumer.java:84)
        at com.rabbitmq.client.impl.ConsumerDispatcher$5.run(ConsumerDispatcher.java:149)
        at com.rabbitmq.client.impl.ConsumerWorkService$WorkPoolRunnable.run(ConsumerWorkService.java:104)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
    Caused by: com.baomidou.dynamic.datasource.exception.CannotFindDataSourceException: dynamic-datasource can not find primary datasource
        at com.baomidou.dynamic.datasource.DynamicRoutingDataSource.determinePrimaryDataSource(DynamicRoutingDataSource.java:90)
        at com.baomidou.dynamic.datasource.DynamicRoutingDataSource.getDataSource(DynamicRoutingDataSource.java:141)
        at com.baomidou.dynamic.datasource.DynamicRoutingDataSource.determineDataSource(DynamicRoutingDataSource.java:77)
        at com.baomidou.dynamic.datasource.ds.AbstractRoutingDataSource.getConnection(AbstractRoutingDataSource.java:43)
        at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:265)
        ... 55 more

      原因以及解决方法:初步判断的原因是如果消费者,调用的是提供者服务的Mybatis-Plus自带的底层方法,比如list,save等方法时候,就会出现上面的错误。解决办法是在你的接口层重新封装一下。

    Mybatis-Plus自带的方法部分。

    封装如下:

    // 接口层
    public interface IXxxService extends IService<ScpIcpbuss> {
        /**
         * 保存数据
         * 
         */
        public void saveNew(XXX xxx);
    }
    
    
    // 实现层
    @Service
    @DubboService(version = "1.0.0")
    public class XxxServiceImpl extends ServiceImpl<xxxMapper, xxx> implements IXxxService {
    
        @Override
        public void saveNew(XXX xxx) {
            this.save(xxx);
        }
    
    }
    

      代码调用说明:

    @Slf4j
    @Service
    public class IcpbussConsumerStrategySpi{
    
        @DubboReference(version = "1.0.0")
        private IXxxService service;
    
        // 保存数据
        private void saveData(XXX xxx) {
            // 这样调用会报错,调用的是Mybatis-plus的方法
            service.save(xxx);
            // 这样正确,不会出现多数据源未配置主数据源的错误,调用的是我们自己封装的saveNew方法
            service.saveNew(xxx);
        }
    }
        
    

      最后:

      目前只是一种简单的解决方法,因为项目比较急,没有深入研究,仅供参考,提供一种思路,如有错漏或者有大佬知道原因的可以留言指教。

      百度到的说Mybatis-Plus不支持Dubbo远程调用使用LambdaQueryWrapper之类的传参,但是也有说3点几的版本支持,但是我们的版本依赖不能修改,所以这里没有尝试,有兴趣的可以试试。

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  • 原文地址:https://www.cnblogs.com/timeout/p/15728847.html
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