Newbie: How to prevent the "Overriding bean definition" from occuring
Good Afternoon,
This is my very first attempt working with Spring Batch. I am using and following the examples provided in the Spring Batch 2.0 book by Michael T. Minella. I ran into a problem when I tried to run the simple Hello World batch job. The specific issue is that bean definition for bean 'helloWorld' is being overrided by a generic bean.
I would like to mention that I am compiling, packaging, and executing this job from the Command Prompt as the book has instructed me to do.
Why is the happening?
How can I prevent this from happening?
Is there something that needs to be properly configured in the 'launch-context.xml' file?
Is there a way that I can disable the overriding in the 'helloWorld.xml' file?
HelloWorld.java
helloWorld.xmlCode:package com.apress.springbatch.chapter2; import org.springframework.batch.core.StepContribution; import org.springframework.batch.core.scope.context.ChunkContext; import org.springframework.batch.core.step.tasklet.Tasklet; import org.springframework.batch.repeat.RepeatStatus; /** * The HelloWorld tasklet is used to write out a simple message to * standard out durring the processing of your job. */ public class HelloWorld implements Tasklet { private static final String HELLO_WORLD = "Hello, world!"; /** * {@inheritDoc} */ @Override public RepeatStatus execute( StepContribution arg0, ChunkContext arg1 ) throws Exception { System.out.println( HELLO_WORLD ); return RepeatStatus.FINISHED; } }
launch-context.xmlCode:<?xml version="1.0" encoding="UTF-8"?> <beans:beans xmlns ="http://www.springframework.org/schema/batch" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch-2.1.xsd"> <beans:import resource="../launch-context.xml"/> <!-- The bean that does the work of the job --> <beans:bean id="helloWorld" class="com.apress.springbatch.chapter2.HelloWorld"/> <!-- The step definition for the helloWorldJob --> <step id="helloWorldStep"> <tasklet ref="helloWorld"/> </step> <!-- The job definition for the helloWorldJob --> <job id="helloWorldJob"> <step id="step1" parent="helloWorldStep"/> </job> </beans:beans>
Error Message from Command PromptCode:<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher"> <property name="jobRepository" ref="jobRepository" /> </bean> <bean id="jobRepository" class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean" p:dataSource-ref="dataSource" p:transactionManager-ref="transactionManager" /> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"> <property name="driverClassName" value="${batch.jdbc.driver}" /> <property name="url" value="${batch.jdbc.url}" /> <property name="username" value="${batch.jdbc.user}" /> <property name="password" value="${batch.jdbc.password}" /> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" lazy-init="true"> <property name="dataSource" ref="dataSource" /> </bean> <bean id="placeholderProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:batch.properties" /> <property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" /> <property name="ignoreUnresolvablePlaceholders" value="true" /> <property name="order" value="1" /> </bean> <!-- Initialize the datasource - remove this bean definition for production use! --> </beans>
Code:C:\Documents and Settings\spring-batch-simple-cli\target>java -jar spr ing-batch-simple-cli-2.0.1.RELEASE.jar job/helloWorld.xml helloWorldJob Apr 24, 2012 3:06:28 PM org.springframework.context.support.AbstractApplicationC ontext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationCont ext@32fb4f: display name [org.springframework.context.support.ClassPathXmlApplic ationContext@32fb4f]; startup date [Tue Apr 24 15:06:28 EDT 2012]; root of conte xt hierarchy Apr 24, 2012 3:06:29 PM org.springframework.beans.factory.xml.XmlBeanDefinitionR eader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [job/helloWorld.xml] Apr 24, 2012 3:06:33 PM org.springframework.beans.factory.xml.XmlBeanDefinitionR eader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [launch-context.xml] Apr 24, 2012 3:06:33 PM org.springframework.beans.factory.support.DefaultListabl eBeanFactory registerBeanDefinition INFO: Overriding bean definition for bean 'helloWorldJob': replacing [Generic be an: class [org.springframework.batch.core.job.flow.support.SimpleFlow]; scope=si ngleton; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; auto wireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] with [Generic bean: class [org.spr ingframework.batch.core.configuration.xml.JobParserJobFactoryBean]; scope=single ton; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowire Candidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; ini tMethodName=null; destroyMethodName=null] Apr 24, 2012 3:06:33 PM org.springframework.context.support.AbstractApplicationC ontext obtainFreshBeanFactory INFO: Bean factory for application context [org.springframework.context.support. ClassPathXmlApplicationContext@32fb4f]: org.springframework.beans.factory.suppor t.DefaultListableBeanFactory@ce5b1c Apr 24, 2012 3:06:34 PM org.springframework.core.io.support.PropertiesLoaderSupp ort loadProperties INFO: Loading properties file from class path resource [batch.properties] Apr 24, 2012 3:06:34 PM org.springframework.beans.factory.support.DefaultListabl eBeanFactory preInstantiateSingletons INFO: Pre-instantiating singletons in org.springframework.beans.factory.support. DefaultListableBeanFactory@ce5b1c: defining beans [jobLauncher,jobRepository,dat aSource,transactionManager,placeholderProperties,helloWorld,org.springframework. batch.core.scope.internalStepScope,org.springframework.beans.factory.config.Cust omEditorConfigurer,org.springframework.batch.core.configuration.xml.CoreNamespac ePostProcessor,helloWorldStep,step1,helloWorldJob]; root of factory hierarchy Apr 24, 2012 3:06:35 PM org.springframework.batch.core.repository.support.JobRep ositoryFactoryBean afterPropertiesSet
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Originally Posted by Marten Deinum
