Question

我已经配置了一个块大小为10的批处理作业。是否可以在运行时读取chunksize？

作为一个例子，我已经实现了以下ChunkListener来说明我的问题：

public class MyChunkListener implements ChunkListener {

private final Logger logger = LoggerFactory.getLogger(this.getClass());

private long startTimeInMs;

@Override
public void beforeChunk(ChunkContext context) {
    startTimeInMs = System.currentTimeMillis();
}

@Override
public void afterChunk(ChunkContext context) {
    long duration = System.currentTimeMillis() - startTimeInMs;
    long chunkSize = 10;
    logger.info(String.format(
            "Chunk of size %s computed in %sms", chunkSize, duration));

是否可以动态访问afterChunk方法中的chunksize？我想做像

这样的事情

long chunkSize = context.getChunkSize();

更新

Joe Chiavaroli提出的解决方案适用于我的情况：只需在BatchConfig中注入chunksize并通过构造函数参数将其传递给ChunkListener：

@Configuration
@EnableBatchProcessing
public class MyBatchConfig {

    @Value("${batch.mystep.chunksize}")
    private int chunkSize;

    @Autowired
    private JobBuilderFactory jobs;

    @Autowired
    private StepBuilderFactory steps;

    @Bean
    protected Step step(MyReader reader, MyProcessor processor, MyWriter writer) {
        return steps.get("myStep")
                .<InputItem, ProcessedItem> chunk(chunkSize)
                .reader(reader)
                .processor(processor)
                .writer(writer)
                .listener(new MyChunkListener(chunkSize))
                .build();

Spring Batch：在运行时读取chunksize

更新

0 个答案: