Spring Boot and Spin Json serialization - Jackson annotations are not working

Camunda 7 Topics Discussion & Questions
1

I’m using Camunda Spring Boot 2.2.0 and Json serialization with Spin. But my Jackson annotations are not supported during serialization and deserialization.

Example of not workring annotation: com.fasterxml.jackson.annotation.JsonIgnore

I also tried to configure existing objectMapper in my configuration implementing DataFormatConfigurator but no success.

@Override
public void configure(JacksonJsonDataFormat dataFormat) {
	spinjar.com.fasterxml.jackson.databind.ObjectMapper objectMapper = dataFormat.getObjectMapper();
	objectMapper.configure(MapperFeature.USE_ANNOTATIONS, true);
}

I found that maybe it’s a problem that I’m using dependency: camunda-spin-dataformat-all (see: Missing Jackson annotation support in Camunda Spin). Solution is to use camunda-spin-dataformat-json-jackson.

But if I’m using camunda-spin-dataformat-json-jackson then JSON serialization is not working at all and “x-java-serialized-object” is used.

I can’t change POJO which I need to serialize as process variable because I have it as a dependency.

I craeted a small test. First object mapper is accepting Jackson annotations that second (spin) doesn’t:

// OK
com.fasterxml.jackson.databind.ObjectMapper om = new com.fasterxml.jackson.databind.ObjectMapper();
String writeValueAsString = om.writeValueAsString(validationResult);

// NOT OK
spinjar.com.fasterxml.jackson.databind.ObjectMapper om2 = new spinjar.com.fasterxml.jackson.databind.ObjectMapper();
String writeValueAsString2 = om2.writeValueAsString(validationResult);

I found another topics about spin but no solution for me:

1:
https://groups.google.com/forum/#!topic/camunda-bpm-users/7lmaGZKk9K4

2:

2

My mistake, camunda spring boot starter is working with dependency camunda-spin-dataformat-json-jackson.

Solution for me was: remove dependency camunda-spin-dataformat-all and use camunda-spin-dataformat-json-jackson (as described in link 1). Jackson annotations in POJOs are working.

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