How struct spring batch multiple reader - spring

Question

I new in springbatch user.
Below data structure is some of sample structre.
user table
| id | name| age|
| -------- | -------------- |-------------- |
| 1 | park |12 |
| 2 | kim |13|
user_service_history table
| id | user_id| status|
| -------- | -------------- |-------------- |
| 1 | 1 |create |
| 2 | 1 |conenct|
| 3 | 1 |delete |
| 4 | 2 |conenct|
Can spring batch do this flow?
I tried step in two reader, But spring batch only allow step in one reader... :(
Job{
step{
reader{
//this reader read to id and name
List<user> userList=select id , name from user
},
processor{/* do some process userList */},
writer{/* do nothing */}
},
step{
reader(List<user> userList){ // this parameter is delivered from above processor
//this reader read to user_service_history
select user_id,status from user_service_history joined user where in userList
},
processor{/* do some process */}
writer{/* final write wanted data */}
}
}

Answer 1

You don't need two readers for that. You have a few options:
use a single reader with a query that joins data from both tables
create a custom reader that reads data as needed from both tables
use the driving query pattern, where a reader reads items from one table and a processor enriches those items from the other table. Items here would be users.