Standalone Camunda using REST

Camunda 7 Topics Discussion & Questions
1

Hi, I am using standalone Camunda and I try to get data from my backend application.
For example I want to get all tasks.
I have following java code and I am able to receive JSON with all of the tasks:

RestTemplate restTemplate = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);

        HttpEntity<String> entity = new HttpEntity<>("parameters", headers);

        ResponseEntity<String> result = restTemplate.exchange("http://localhost:8080/engine-rest/task", HttpMethod.GET, entity, String.class);
        System.out.println(result.getBody());

But now I want to convert it to java objects and work with Camunda classes. I’m trying to use Jackson:

ObjectMapper objectMapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        List<TaskDto> tasks = objectMapper.readValue(result.getBody(), new TypeReference<List<TaskDto>>() {});

But I can’t parse incoming JSON, I can skip "Unrecognized field “lastUpdated” with option FAIL_ON_UNKNOWN_PROPERTIES. But then I’m stuck on “Cannot construct instance of org.camunda.bpm.engine.form.CamundaFormRef”.

What is the proper way of communicating with standalone Camunda via REST?

Thank You!

Camunda 7.17, Java 17, Jackson 2.13.4

2

Hi @OndrejH,

Below Java Client is an excellent fit for your case

1 Like
3

Thank you. I will use it this way.

1 Like