How to configure the ObjectMapper for Unirest in a spring boot project - spring-boot

Question

I am using Unirest in a project which is working fine for me. However, I want to post some data and do not want to escape all the JSON as it looks ugly and is just a pain in the neck.
I found a few links on how to configure the ObjectMapper for Unirest and it gives this code.
Unirest.setObjectMapper(new ObjectMapper() {
com.fasterxml.jackson.databind.ObjectMapper mapper =
new com.fasterxml.jackson.databind.ObjectMapper();
public String writeValue(Object value) {
try {
return mapper.writeValueAsString(value);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
public <T> T readValue(String value, Class<T> valueType) {
try {
return mapper.readValue(value, valueType);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
});
But, no examples show where it is best to do this in a Spring Boot API project.
I tried to set it up in the main class method, but I am getting an error that 'setObjectMapper' cannot be resolved. I also tried to do this in the controller but I get the same error.
My Gradle deps for these two libraries are:
// https://mvnrepository.com/artifact/com.mashape.unirest/unirest-java
compile group: 'com.mashape.unirest', name: 'unirest-java', version: '1.4.5'
compile 'com.fasterxml.jackson.core:jackson-databind:2.10.1'
Can anyone show me how to use the Jackson object mapper with Unirest in a Spring Boot API project as I have been googling and reading docs for two days now. Would appreciate some help.
Thank you in advance

Answer 1

You have several issues here:
The version of unirest you're using (1.4.5) does not contain the feature to configure object mapper. This feature was added later (github PR). So you should update to the latest version available at maven central - 1.4.9. This alone will fix your compilation problem.
You can keep your Unirest configuration code in the main method. However if you want to use not default jackson ObjectMapper(), but the one from the spring context, then it's better to create something like a fake spring bean to inject ObjectMapper:
#Configuration
public class UnirestConfig {
#Autowired
private com.fasterxml.jackson.databind.ObjectMapper mapper;
#PostConstruct
public void postConstruct() {
Unirest.setObjectMapper(new ObjectMapper() {
public String writeValue(Object value) {
try {
return mapper.writeValueAsString(value);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
public <T> T readValue(String value, Class<T> valueType) {
try {
return mapper.readValue(value, valueType);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
});
}
}
Other than that it looks this library changed the package name. Now it's com.konghq. You might want to consider updating, but library API might have changed.
Upd: for the latest version
compile group: 'com.konghq', name: 'unirest-java', version: '3.1.04'
the new API is Unirest.config().setObjectMapper(...)