Difference between Spring Async, Async with CompletableFuture and Java8 parallel stream

Question

I am working on list to validate list data and then map it to Db Entity using MapStruct and finally save list in multiple table as batch process - parent and child table using Spring data JPA. I am using parallel stream to achieve to complete this process. Also I need result of persisted data in response where all final data I am exporting to one file to upload.

Which one suite best in my case and why?

List<Data> data; //10K records

converting into list of list with 1K records
List<List<Data>> datalist; //1K records in each list

datalist.parrallelStream.foreach( data-> 
{
    validate(data);
    List<Entity> list = mapToEntity(data);
    EntityRepo.saveAll(list); //batch_size = 1000; oracle db
}
) 

class Entity {
@Id
String id; // generating Id manually in my code using UUID. 
}

Answer 1

Async - This will make the processing asynchronous and make it work independently.

Java 8 parallelStream - creates subsequent threads based on the input data and processes it simultaneously.

In your case, the data will be processed by independently in multiple threads.