如何解决JobBuilderFactory和StepBuilderFactory的弃用警告

Question

我使用以下工厂来设置我的 Spring Batch 应用程序：

private JobBuilderFactory jobBuilderFactory;
private StepBuilderFactory stepBuilderFactory;

但是，我收到以下弃用警告：

The type JobBuilderFactory has been deprecated since version 5.0.0 and marked for removal

这些是我正在使用的 bean 声明：

@Bean
public Step step1() {
    return stepBuilderFactory
        .get("csv-step")
        .<MSTabcNEUser, MSTabcNEUser>chunk(10)
        .reader(reader())
        .processor(processor())
        .writer(writer())
        .taskExecutor(taskExecutor())
        .build();
}

@Bean
public Job runJob() {
    return jobBuilderFactory
        .get("MSTabcNEUser")
        .flow(step1())
        .end()
        .build();
}

我还收到以下错误：

Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jobController': Unsatisfied dependency expressed through field 'job': Error creating bean with name 'runJob' defined in class path resource [com/nissan/auraQuantics/config/SpringBatchConfig.class]: Failed to instantiate [org.springframework.batch.core.Job]: Factory method 'runJob' threw exception with message: Error creating bean with name 'step1' defined in class path resource [com/nissan/auraQuantics/config/SpringBatchConfig.class]: Unsatisfied dependency expressed through method 'step1' parameter 2: No qualifying bean of type 'org.springframework.batch.item.database.JdbcBatchItemWriter<com.nissan.auraQuantics.entity.MSTAuraQuanticNEUser>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
2023-02-20T16:10:49.187+05:30  INFO 22644 --- [  restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2023-02-20T16:10:49.199+05:30  INFO 22644 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2023-02-20T16:10:49.221+05:30  INFO 22644 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed. 

Answer 1

您可以使用

JobBuilderFactory

和

StepBuilderFactory

类来代替使用

JobBuilder

和

StepBuilder

：

@Bean
public Step step1() {
    return new StepBuilder("csv-step", jobRepository)
        .<MSTabcNEUser, MSTabcNEUser>chunk(10, transactionManager)
        .reader(reader())
        .processor(processor())
        .writer(writer())
        .taskExecutor(taskExecutor())
        .build();
    }

@Bean
public Job runJob() {
    return new JobBuilder("MSTabcNEUser", jobRepository)
        .start(step1())
        .build();
}

最大的区别在于，您需要将

JobRepository

传递给这些构建器，并将

PlatformTransactionManager

传递给

chunk()

方法。 您可以将这些作为字段添加到您的配置类中。 例如：

private JobRepository jobRepository;
private PlatformTransactionManager transactionManager;

另请注意，

ItemWriter

界面已从支持项目集合更改为

Chunk<? extends T>

。 您可能必须重构一些编写器。 另请查看 Spring Batch 5.0 迁移指南。

Answer 2

引起：org.springframework.beans.BeanInstantiationException：无法实例化[org.springframework.batch.core.repository.JobRepository]：工厂方法“jobRepository”抛出异常并显示消息：无法配置默认作业存储库

我做了同样的事情，但得到了像下面这样的异常 导致：org.springframework.batch.core.configuration.BatchConfigurationException：无法配置默认作业存储库

原因：org.springframework.batch.core.configuration.BatchConfigurationException：无法在应用程序上下文中找到数据源bean。要使用默认配置，应在应用程序上下文中定义名为“dataSource”的数据源 bean，但未找到任何数据源 bean。重写 getDataSource() 以提供用于批处理元数据的数据源。