我正在使用Spring Batch创建作业,该作业是从骆驼处理器手动启动的。
我需要将一些参数传递给我的工作,其中一个参数需要在我的工作的映射器中使用,但我找不到实现此目标的方法。
这是我的工作:
@Bean
public LineMapper<MyEntity> lineMapper() {
DefaultLineMapper<MyEntity> lineMapper = new DefaultLineMapper<MyEntity>();
DelimitedLineTokenizer lineTokenizer = new DelimitedLineTokenizer() {
{
setNames(new String[] { "val1", "val2" });
}
};
lineTokenizer.setDelimiter(";");
lineMapper.setLineTokenizer(lineTokenizer);
lineMapper.setFieldSetMapper(new MyEntityFieldsetMapper());
return lineMapper;
}
public class MyEntityFieldsetMapper implements FieldSetMapper<MyEntity> {
@Override
public MyEntity mapFieldSet(FieldSet fieldSet) throws BindException {
MyEntity MyEntity = new MyEntity();
MyEntity.setValOne(fieldSet.readString("val1"));
MyEntity.setValTwo(fieldSet.readString("val2"));
// Here I need to set the variable in job parameters
MyEntity.setValThree();
return MyEntity;
}
}
@Bean
@StepScope
public FlatFileItemReader<MyEntity> MyEntityFlatFileItemReader(
@Value("#{jobParameters[inputCsvPath]}")
String inputCsvPath, @Value("#{jobParameters[myCustomVal]}")
String myCustomVal) {
//Create reader instance
FlatFileItemReader<MyEntity> reader = new FlatFileItemReader<MyEntity>();
//Set input file location
reader.setResource(new FileSystemResource(inputCsvPath));
//Set number of lines to skips. Use it if file has header rows.
reader.setLinesToSkip(0);
//Configure how each line will be parsed and mapped to different values
reader.setLineMapper(lineMapper());
return reader;
}
@Bean
public Job readCSVFilesJob(JobBuilderFactory jobBuilderFactory, StepBuilderFactory stepBuilderFactory,
ItemReader<MyEntity> MyEntityItemReader, ItemWriter<MyEntity> MyEntityWriter) {
Step step = stepBuilderFactory.get("step").<MyEntity, MyEntity>chunk(10000).reader(MyEntityItemReader)
.writer(MyEntityWriter).build();
return jobBuilderFactory.get("readCSVFilesJob").incrementer(new RunIdIncrementer()).start(step).build();
}
我可以在jobParameters
中获得ItemReader
,但是不能将其传递给我的lineMapper
和FieldSetMapper
。
有没有办法做到这一点?
答案 0 :(得分:1)
使LineMapper
bean步骤的作用域确定范围,并像为阅读器所做的那样在其中注入作业参数,例如:
@Bean
@StepScope
public LineMapper<MyEntity> lineMapper(@Value("#{jobParameters[inputCsvPath]}") String inputCsvPath) {
// use job parameter here
}
如果还想在其中插入作业参数,则可能还需要声明MyEntityFieldsetMapper
作为步骤作用域bean。