Access to stepExecution inside FlatFileFooterCallback - spring-batch

Question

I am creating a fixed length file I have to attached the number of files that are read in to the footer. I need to access the the stepExecution to get the write count, I followed this FlatFileFooterCallback - how to get access to StepExecution For Count. StepExecution is null??
FlatFileFooterCallback
public class LexisNexisRequestFileFooter implements FlatFileFooterCallback {
#Value("#{StepExecution}")
private StepExecution stepExecution;
int totalItemsWritten = 0;
#Override
public void writeFooter(Writer writer) throws IOException {
System.out.println(stepExecution.getWriteCount());
String julianDate = createJulianDate();
String SAT = "##!!SAT#"+julianDate+totalItemsWritten+" \r\n";
String SIT = "##!!SIT#"+julianDate+totalItemsWritten+" \r\n";
String footer = SAT+SIT;
writer.write(footer);
}
}
Configuration file
#Bean
#StepScope
public FlatFileFooterCallback customFooterCallback() {
return new LexisNexisRequestFileFooter();
}
Writer file
// Create writer instance
FlatFileItemWriter<LexisNexisRequestRecord> writer = new FlatFileItemWriter<>();
LexisNexisRequestFileFooter lexisNexisRequestFileFooter = new LexisNexisRequestFileFooter();
writer.setFooterCallback(lexisNexisRequestFileFooter);
// Set output file location
writer.setResource(new FileSystemResource("homeData.txt"));
// All job reptitions should append to same output file
writer.setAppendAllowed(true);
writer.setEncoding("ascii");

Answer 1

In your writer configuration, you are creating the footer callback manually here:
LexisNexisRequestFileFooter lexisNexisRequestFileFooter = new LexisNexisRequestFileFooter();
writer.setFooterCallback(lexisNexisRequestFileFooter);
and not injecting the step scoped bean. Your item writer bean definition method should be something like:
#Bean
public FlatFileItemWriter writer() {
// Create writer instance
FlatFileItemWriter<LexisNexisRequestRecord> writer = new FlatFileItemWriter<>();
writer.setFooterCallback(customFooterCallback());
// Set output file location
writer.setResource(new FileSystemResource("homeData.txt"));
// All job reptitions should append to same output file
writer.setAppendAllowed(true);
writer.setEncoding("ascii");
}