AWS Lambda json deserialization with jackson annotations

Question

I\'m calling an aws lambda with a json body. So the fields of the json are with different name from the ones in the POJO. So what I did is to add @JsonProperty on the fields

Answer 1

So I found a way to do this. You need to implement RequestStreamHandler which gives you input and output streams which you can work with:

import com.amazonaws.services.lambda.runtime.RequestStreamHandler

public class ChartHandler implements RequestStreamHandler {
    private ObjectMapper objectMapper = new ObjectMapper();

    @Override
    public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {
        DeserializationClass deserializedInput = objectMapper.readValue(inputStream, DeserializationClass.class)
        objectMapper.writeValue(outputStream, deserializedInput); //write to the outputStream what you want to return
    }

}

Having the input and output streams makes you independent of the format and frameworks you use to parse it.