Spring 批处理不执行 StepExecutionListener beforeStep 或 afterStep 方法

Spring Batch not executing StepExecutionListener beforeStep or afterStep methods

更新: 我重新 运行 我的代码,实际上注意到 none 我的听众正在工作...

我有一个 Spring 批处理应用程序,我正在覆盖 StepExecutionListener 并提供我自己的实现。我正在使用 TaskletStep 注册它,但是,我从未看到 beforeStep/afterStep 方法应该输出的日志消息:

MyStepExecutionListener.java

public class MyStepExecutionListener implements StepExecutionListener {

 @Override
    public void beforeStep(StepExecution stepExecution) {
        // begin my own custom implementation
        LOGGER.info("Before the step!");
    }

    @Override
    public ExitStatus afterStep(StepExecution stepExecution) {
         // begin my own custom implementation
         LOGGER.info("After the step!");
        return stepExecution.getStatus();

    }
}

我在 BatchConfig.java class 中将我的 Tasklet Step 定义为:

public BatchConfig {

@Bean
    public static org.springframework.batch.core.scope.JobScope jobScope() {
        org.springframework.batch.core.scope.JobScope jobScope = new org.springframework.batch.core.scope.JobScope();
        jobScope.setProxyTargetClass(true);
        jobScope.setAutoProxy(true);
        return jobScope;
    }

    @Bean
    public static org.springframework.batch.core.scope.StepScope stepScope() {
        org.springframework.batch.core.scope.StepScope stepScope = new org.springframework.batch.core.scope.StepScope();
        stepScope.setProxyTargetClass(true);
        stepScope.setAutoProxy(true);
        return stepScope;
    }

    @Bean
//    @StepScope
    public StepExecutionListener stepExecutionListener() {
        return new MyStepExecutionListener();
    }

 @Bean
    @Qualifier("s3FlatfFileReaderForMktgOffrs")
    @StepScope
    public S3FlatFileItemReader<FieldSet> s3FlatfFileReaderForMktgOffrs() {
        return new S3FlatFileItemReader<>(lineMapper());
    }

 @Bean
    @Qualifier("s3FlatfFileReaderCustom")
    @StepScope
    public S3FlatFileItemReader<FieldSet> s3FlatfFileReaderCustom() {
        // Custom class that Extends FlatFileItemReader
        return new S3FlatFileItemReader<>(lineMapper());
    }

  @Bean
    @Qualifier("myCustomFileItemReader")
    @StepScope
    public ItemStreamReader<List<FieldSet>> myCustomFileItemReader(
            @Value("#{jobParameters}") Map jobParameters) {

        String fileName = (String) jobParameters.get("fileName");
        String region = (String) jobParameters.get("region");
        String bucketName = awsS3EastBucket;
        if (StringUtils.equals(region, Regions.US_WEST_2.getName())) {
            bucketName = awsS3WestBucket;
        }

        // Custom class that Extends FlatFileItemReader
        S3FlatFileItemReader<FieldSet> s3FileItemReader = s3FlatfFileReaderCustom();

     
         s3FileItemReader.setResource(S3_PROTOCOL_PREFIX + bucketName + SLASH + fileName);
        }

        s3FileItemReader.setStrict(false);
        s3FileItemReader.setLinesToSkip(1);
        s3FileItemReader.setSaveState(false);

        AggregateItemReader aggregateItemReader = new AggregateItemReader(s3FileItemReader) {
            @Override
            protected String getItemKey(FieldSet item) {
                return item.readString(FIRST_NAME) + "-" +
                        item.readString(LAST_NAME);
            }
        };
        SynchronizedItemStreamReader<List<FieldSet>> fieldSetSynchronizedItemStreamReader = new SynchronizedItemStreamReader<>();
        fieldSetSynchronizedItemStreamReader.setDelegate(aggregateItemReader);
        return fieldSetSynchronizedItemStreamReader;
    }



@Bean(name = "myCustomStep")
    @Scope("prototype")
    @SuppressWarnings("unchecked")
    public Step myCustomStep(PlatformTransactionManager transactionManager) {
        TaskletStep step = stepBuilderFactory.get("myCustomStep")
                .<List<FieldSet>, List<MyPayLoadRecord>>chunk(250)
                .reader(myCustomFileItemReader(OVERRIDDEN_BY_EXPRESSION))
                .processor(myCustomProcessor())
                .writer(myCustomWriter())
                .faultTolerant()
                .skipPolicy(new AlwaysSkipItemSkipPolicy())
                .skip(DataValidationException.class)
                .listener(stepExecutionListener())
                .listener(new CustomReaderListener())
                .listener(new CustomProcessListener())
                .listener(new CustomWriteListener())
                .listener(new CustomSkipListener())
                .taskExecutor(batchTaskExecutor())
                .throttleLimit(maxThreads)
                .build();
        step.setTransactionManager(transactionManager);
        //step.registerStepExecutionListener(stepExecutionListener());
        step.registerChunkListener(new CustomChunkListener());
        return step;
    }
}

我已经注释掉 step.registerStepExecutionListener(stepExecutionListener()); 并尝试设置监听器,如上所示,但两种实现均无效。我的印象是我应该只实现 StepExecutionListener 然后将它注册到 TaskletStep - 我在这里遗漏了什么吗?

我不明白将你的步骤作为原型范围 bean 的原因,但我无法使用类似于你共享的设置重现该问题(使用 Spring Batch v4. 3.3).这是一个简单的例子:

import java.util.Arrays;

import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.StepExecution;
import org.springframework.batch.core.StepExecutionListener;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepScope;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.batch.item.support.ListItemReader;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;

@Configuration
@EnableBatchProcessing
public class SO68217675 {

    @Bean
//    @StepScope // works with a step-scoped bean as well
    public StepExecutionListener stepExecutionListener() {
        return new MyStepExecutionListener();
    }

    @Bean
//    @Scope("prototype") // works with a prototype bean as well, but I don't understand the reason for that scope
    public Step step(StepBuilderFactory stepBuilderFactory) {
        return stepBuilderFactory.get("step")
                .<Integer, Integer>chunk(2)
                .reader(new ListItemReader<>(Arrays.asList(1, 2, 3, 4)))
                .writer(items -> items.forEach(System.out::println))
                .listener(stepExecutionListener())
                .build();
    }

    @Bean
    public Job job(JobBuilderFactory jobBuilderFactory, StepBuilderFactory stepBuilderFactory) {
        return jobBuilderFactory.get("job")
                .start(step(stepBuilderFactory))
                .build();
    }

    static class MyStepExecutionListener implements StepExecutionListener {

        @Override
        public void beforeStep(StepExecution stepExecution) {
            System.out.println("MyStepExecutionListener.beforeStep");
        }

        @Override
        public ExitStatus afterStep(StepExecution stepExecution) {
            System.out.println("MyStepExecutionListener.afterStep");
            return ExitStatus.COMPLETED;
        }
    }

    public static void main(String[] args) throws Exception {
        ApplicationContext context = new AnnotationConfigApplicationContext(SO68217675.class);
        JobLauncher jobLauncher = context.getBean(JobLauncher.class);
        Job job = context.getBean(Job.class);
        jobLauncher.run(job, new JobParameters());
    }

}

此示例打印以下内容(如预期):

MyStepExecutionListener.beforeStep
1
2
3
4
MyStepExecutionListener.afterStep

根据@MahmoudBenHassine 的回答 - 通过将监听器(步骤或其中任何一个)实现为静态嵌套 class,我能够在我的 BatchConfiguration.java [=63] 中使用 Slf4j 记录器=],然后看到 确实听众 正在工作 。不过,我仍然感到困惑,为什么当我在自己的 package/class 中定义监听器时,这似乎 不起作用 。然后我开始怀疑 LOGGERS,因为基本上,这就是我验证它是否“工作”的方式。因此,我在我的 StepExecutionerListener 中放置了一些 System.out.println("") 虚拟输出(我遇到的问题是在其自己的自定义 Class/package 中定义的)和 瞧瞧,我看到了输出。

因此,Listener 一直在工作,但是,LOGGERS 没有工作,而且我的验证方法很差,因为这是 shadowing/hiding 的主要问题(使用 LOGGERS 作为 Step/Chunk/Job 监听器是否工作的证据)。

根据这个 post,这让我更加好奇我的 POM 中的 slf4j/log4j 依赖项出了什么问题,或者我可能遗漏了什么:

Spring Batch produces no logging output when launched from the command line

此外,我根据这篇文章以一种记录日志的方式设置了我的 POM.xml,它建议从所有 spring-boot-starters 中删除所有 spring-boot-starter-logging(我这样做了),如果您打算使用 log4j(就像我一样),则添加 1 spring-boot-starter-log4j2 依赖项:

https://www.baeldung.com/spring-boot-logging

无论如何,我在我的 POM 中定义的 spring-boot-starter-batch 依赖项中删除了 spring-boot-starter-logging<exclusion> 并且日志记录现在(看起来)在自定义 class 听众 (Step/Chunk/Job) 现在。

当我在 IntelliJ 中检查我的项目依赖项时,我有:

log4j:log4j:1.2.15
org.apache.logging.log4j:log4j-api:2.13.3
org.apache.logging.log4j:log4j-core:2.13.3
org.apache.logging.log4j:log4j-jul:2.13.3
org.apache.logging.log4j:log4j-slf4j-impl:2.13.3
org.slf4j:jcl-over-slf4j:1.7.30
org.slf4j:jul-to-slf4j:1.7.30
org.slf4j:log4j-over-slf4j:1.7.30
org.slf4j:slf4j-api:1.7.30

我注意到通过删除 spring-boot-starter-batch 上的排除项,如上所述,我看到添加了此依赖项:

org.apache.logging.log4j:log4j-to-slf4j:2.13.3

所以我假设 Spring 在触发侦听器 before/after 日志记录方法时批处理需要这个。希望这对任何人都有帮助!