Newbie: How to prevent the "Overriding bean definition" from occuring

[mychickbad]

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

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; 
     } 
}

helloWorld.xml

<?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>

launch-context.xml

<?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>

Error Message from Command Prompt

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