加载批处理XML配置时找不到Spring bean，但在应用程序上下文中可用

Question

Here is my XML configuration file. When I am trying to load it, it is giving an error.But the bean is already present in the application context, which is used to fetch some data and is working perfectly fine.

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="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.xsd   http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch.xsd   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd   ">
    <description>Batch Configuration</description>
    <property-placeholder
        xmlns="http://www.springframework.org/schema/context"
        location="./analytics-config.properties" />
    <bean class="org.springframework.batch.core.scope.StepScope" />
    <bean
        class="com.intellect.riskanalytics.batch.jobs.instruments.InstrumentsReader"
        id="instrumentReader" scope="step">
        <property name="dataService" ref="dataService" />
        <property name="stepExecution" value="#{stepExecution}" />
    </bean>
    <bean
        class="com.intellect.riskanalytics.batch.jobs.instruments.InstrumentsProcessor"
        id="instrumentProcessor">
        <constructor-arg index="0" ref="dataService" />
    </bean>
    <bean
        class="com.intellect.riskanalytics.batch.jobs.instruments.DurationsWriter"
        id="durationsWriter" scope="step">
        <property name="dataService" ref="dataService" />
        <property name="stepExecution" value="#{stepExecution}" />
    </bean>
    <job xmlns="http://www.springframework.org/schema/batch" id="durationsJob">
        <step id="abstractIsinDurationsStep">
            <tasklet>
                <chunk commit-interval="${batch.writer.chunk-size}"
                    processor="instrumentProcessor" reader="instrumentReader"
                    writer="durationsWriter" />
            </tasklet>
        </step>
    </job>
</beans>


Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'dataService' available
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:687)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1213)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)
    ... 30 more

I tried importing it through, ImportResource annotation, CommandlineRunner interface, and a manual call after the server has started. This is the Application class file.

import java.util.Arrays;

import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.ImportResource;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.intellect.riskanalytics.util.Logger;

/**
 * Startup class for launching the application by Spring Boot
 *
 * @see SpringBootApplication
 * @see EnableBatchProcessing
 * @see EnableCaching
 * @since 1.0
 */
@SpringBootApplication
@EnableBatchProcessing
@EnableCaching
@ImportResource("classpath:analytics-batch-test.xml")
public class AnalyticsApplication {
    private static final Logger logger = new Logger(AnalyticsApplication.class);

    @Autowired
    private static ApplicationContext applicationContext;

    /**
     * Main method to be executed for starting the application in spring context
     *
     * @param args
     *            the command line arguments if any
     */
    public static void main(String[] args) {
        logger.info("Starting Risk Analytics Application With Arguments:" + Arrays.toString(args));
        SpringApplication.run(RiskAnalyticsApplication.class, args);
        logger.info("Started Risk Analytics Application");
        createBatchJobsContext("");
    }

    private static void createBatchJobsContext(String batchXMLLocation) {
        batchXMLLocation = "classpath:riskanalytics-batch-test.xml";
        logger.info("Creating Batch XML Application Context with: " + batchXMLLocation);
        // Tried this
        ApplicationContext batchXMLContext = new ClassPathXmlApplicationContext(new String[] { batchXMLLocation },
                applicationContext);
        // And this
        ApplicationContext batchXMLContext = new ClassPathXmlApplicationContext(batchXMLLocation);

        logger.info("Created Batch application context: " + batchXMLContext);
    }
}

Thank you.

Answer 1

Joeri Hendrickx 's comment gave me a solution. The application context is null in both cases of ImportResource and manual loading of XML after the application started. It worked when it is loaded in CommandLineRunner 's run() method. I think until the completion of CommandLineRunner implementations, the application context is not prepared completely.