Spring Batch Annotated没有XML传递参数到项目Readere

时间:2018-01-09 15:15:08

标签: spring-boot spring-batch

我创建了一个简单的Boot / Spring Batch 3.0.8.RELEASE作业。我创建了一个实现JobParametersIncrementer的简单类来转到数据库,查找查询应查找的天数并将它们放入JobParameters对象。

我在JdbcCursorItemReader中需要该值,因为它是基于查找的JobParameters之一选择数据,但我无法通过Java注释来解决这个问题。 XML示例很多,而不是Java。

下面是我运行作业的BatchConfiguration类。

`

@Autowired
SendJobParms jobParms; // this guy queries DB and puts data into JobParameters

@Bean
public Job job(@Qualifier("step1") Step step1, @Qualifier("step2") Step step2) {
    return jobs.get("DW_Send").incrementer(jobParms).start(step1).next(step2).build();
}

@Bean
protected Step step2(ItemReader<McsendRequest> reader,
                     ItemWriter<McsendRequest> writer) {
    return steps.get("step2")
            .<McsendRequest, McsendRequest> chunk(5000)
            .reader(reader)
            .writer(writer)
            .build();
}


@Bean
public JdbcCursorItemReader reader() {
    JdbcCursorItemReader<McsendRequest> itemReader = new JdbcCursorItemReader<McsendRequest>();
    itemReader.setDataSource(dataSource);

// want to get access to JobParameter here so I can pull values out for my sql query.
    itemReader.setSql("select xxxx where rownum <= JobParameter.getCount()");
    itemReader.setRowMapper(new McsendRequestMapper());
    return itemReader;
}

`

1 个答案:

答案 0 :(得分:2)

更改阅读器定义如下(类型Long和名称paramCount的参数示例):

@Bean
@StepScope
public JdbcCursorItemReader reader(@Value("#{jobParameters[paramCount]}") Long paramCount) {
    JdbcCursorItemReader<McsendRequest> itemReader = new JdbcCursorItemReader<McsendRequest>();

    itemReader.setDataSource(dataSource);

    itemReader.setSql("select xxxx where rownum <= ?");

    ListPreparedStatementSetter listPreparedStatementSetter = new ListPreparedStatementSetter();
    listPreparedStatementSetter.setParameters(Arrays.asList(paramCount));
    itemReader.setPreparedStatementSetter(listPreparedStatementSetter);

    itemReader.setRowMapper(new McsendRequestMapper());
    return itemReader;
}