Spring Batch reader file by file - spring

Question

I'm developing a Spring webapp, using spring boot and spring batch frameworks.
We have a set of complex & different json files, and we need to:
read each file
slightly modify its content
finally store them in mongodb.
The question: It makes sense to use spring batch for this task? As I can see in tutorials examples etc, spring batch is the right tool for line by line processing, but what about file by file?
I don't have problems with the writer (MongoItemWritter) and processer, but I do not see how to implement the reader.
Thanks!

Answer 1

yes you can definetly use Spring Batch.
The item for your Reader can be a File.
public class CustomItemReader implements InitializingBean{
private List<File> yourFiles= null;
public File read() {
if ((yourFiles!= null) && (yourFiles.size() != 0)) {
return yourFiles.remove(0);
}
return null;
}
//Reading Items from Service
private void reloadItems() {
this.yourItems= new ArrayList<File>();
// populate the items
}
#Override
public void afterPropertiesSet() throws Exception {
reloadItems();
}
}
A custom Processor :
public class MyProcessor implements ItemProcessor<File, File> {
#Override
public File process(File arg0) throws Exception {
// Apply any logic to your File before transferring it to the writer
return arg0;
}
}
And A custom Writer :
public class MyWriter{
public void write(File file) throws IOException {
}
}