春季批-“工作"范围内的bean不能注入到"job"对象中.或“步骤"范围豆 [英] Spring Batch - "job" scoped beans can not be injected into "job" or "step" scoped beans

问题描述

我使用的是Spring批处理版本3.0.2.RELEASE和Spring框架版本3.2.12.RELEASE.而且我正在尝试将一个作业范围的bean注入另一个作业范围的bean.

I am using spring batch version 3.0.2.RELEASE and spring framework version 3.2.12.RELEASE. And I am trying to inject a job scoped bean to another job scoped bean.

我的配置看起来像这样

<bean id="beanA" class="com.trial.BeanA" scope="job" >
    <property name="beanB" ref="beanB" />
</bean>

<bean id="beanB" class="com.trial.BeanB" scope="job"/>

它引发了一个异常，并带有详细信息:

It throws an exception with details:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.beanA' defined in class path resource [trial-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'com.trial.BeanB' for property 'beanB'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.trial.BeanB] for property 'beanB': no matching editors or conversion strategy found
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:529)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
    at org.springframework.beans.factory.support.AbstractBeanFactory$2.getObject(AbstractBeanFactory.java:331)
    at org.springframework.batch.core.scope.JobScope.get(JobScope.java:103)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:327)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:191)
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:34)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:184)
    at com.sun.proxy.$Proxy13.getValue(Unknown Source)
    at org.springframework.batch.core.listener.CompositeJobExecutionListener.beforeJob(CompositeJobExecutionListener.java:73)
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:301)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:49)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'com.trial.BeanB' for property 'beanB'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.trial.BeanB] for property 'beanB': no matching editors or conversion strategy found
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:464)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:495)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:489)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1465)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1424)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1160)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    ... 18 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.trial.BeanB] for property 'beanB': no matching editors or conversion strategy found
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:267)
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:449)
    ... 24 more

即使我尝试将作业"范围的bean注入步骤"范围的bean，它也会失败并引发类似的异常.

Even I try to inject a "job" scoped bean to a "step" scoped bean, it fails and throws a similar exception.

我该如何解决这个问题?

How can I solve the issue?

推荐答案

您正在使用需要接口的Java代理，但是您的BeanB并未实现BeanA所针对的接口.您需要切换到动态子类化，或者让BeanB实现一个接口并让BeanA期望该接口.

You are using java proxying which requires interfaces, yet your BeanB doesn't implement an interface that BeanA is coded against. You need to either switch to dynamic subclassing or have BeanB implement an interface and have BeanA expect that interface.

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