CODEWITHSUNDEEP
javafunctional-programmingreactive-programmingspring-webflux
paulo
paulo

Reputation: 41

How to get value from mono

Im really new with reactive programming. Im trying to figure out what to do here

i have written the following code:

templateService.getTemplate(id)
     .map(this::setTemplate)
     .map(c -> convertDTOToBO(dto, c))
     .flatMap(templateService::toPdf)
     .map(content -> ResponseEntity.ok()
     .header("Content-Disposition", "attachment; filename=\"test_" + NAMEPROPERTYHERE + ".pdf\"")
           .body(content));

I need to get a value that is on the object that returns from templateService.getTemplateById(id), need to take the property 'name' to put on the 'filename' (where i write NAMEPROPERTYHERE). I just cant figure out how i can do it.

the problem is that when it gets to the last map, the object is not the same anymore and i cant get the value i need.

Im so used to the traditional way of programming that i can only think to pass it to a variable.. what the best way to do that?

Upvotes: 0

Views: 808

Answers (1)

Alex
Alex

Reputation: 5972

You could just shift logic "one-level down" to get access to the template

templateService.getTemplate(id)
        .map(template ->
                setTemplate(template)
                    .map(c -> convertDTOToBO(dto, c))
                    .flatMap(templateService::toPdf)
                    .map(content -> ResponseEntity.ok()
                            .header("Content-Disposition", "attachment; filename=\"test_" + template.getName() + ".pdf\"")
                            .body(content))
        );

Upvotes: 1

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