Looks like jackson's annotations are ignored

@botbfr

Describe the issue

I have overriden RequestHandler<I, O> with my lambda. All the jackson's annotations in my pojo (PreSignUpEvent) are ignored (Tested with JsonProperty so far). => The attributes that does not require an annotation are correctly deserialized (Because the attribute's name is the same than the object attribute's name) but not the ones with 2 different names (that's why I need to use JsonProperty annotation)

I'm using jackson v2 annotations.

I tried with RequestStreamHandler, calling in my lambda 'new ObjectMapper().readValue(InputStream, MyPojo.class)' and it worked. The annotations are taken into account.

My pojo and the lambda (just for the example here, I tried with the field 'version' -> versionn):

public class PreSignUpEvent {

    @JsonProperty("version")
    private int versionn;

    private String region;


    public PreSignUpEvent() {
    }

    public int getVersionn() {
        return versionn;
    }

    public void setVersionn(int versionn) {
        this.versionn = versionn;
    }

    public String getRegion() {
        return region;
    }

    public void setRegion(String region) {
        this.region = region;
    }
@Named("validateUsername")
public class ValidateUsername implements RequestHandler<PreSignUpEvent, PreSignUpEvent> {

    @Override
    public PreSignUpEvent handleRequest(PreSignUpEvent input, Context context) {
 {
        LambdaLogger logger = context.getLogger();
        logger.log("input is "+input);
        return input;
}

logs:

{"region":"eu-west-1"} and version is ignored.

Do you have any idea ? Is it link to a reflection issue ?

Steps to Reproduce

Override RequestHandler<I, O> lambda,
Create a pojo that needs annotations to be deserialized

any updated?

you might want to try custom serialisation to achieve the desired behaviour. Take a look at https://docs.aws.amazon.com/lambda/latest/dg/java-custom-serialization.html

you might want to try custom serialisation to achieve the desired behaviour. Take a look at https://docs.aws.amazon.com/lambda/latest/dg/java-custom-serialization.html

Thank you for your reply.
I'm using it for my lambda, but it seems does not work with aws-lambda-java-tests

I have this unit test:

@ParameterizedTest
@Event(value = "event.json", type = UpdateTemplateEvent.class)
public void testLambda(UpdateTemplateEvent event) throws IOException {
    OpenRewriteBuildHandler eventHandler = new OpenRewriteBuildHandler();
    eventHandler.setInjector(injector);

    eventHandler.handleRequest(event, context);
}

with this pojo:

public class UpdateTemplateEvent {

    @JsonProperty("timestamp")
    public String timestamp;

    @JsonProperty("repo_ms")
    public String repository;
    @JsonProperty("repo_ms_commit")
    public String commit;

    public UpdateTemplateEvent() {
    }
}

but with the following json (event.json):

{
  "timestamp": "timestamp",
  "repo_ms": "myrepot",
  "repo_ms_commit": "mycommit",
}

commit and repository field results null.

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Looks like jackson's annotations are ignored #491

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Looks like jackson's annotations are ignored #491

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mancioshell commented on Jan 27, 2025

smirnoal commented on Jan 27, 2025

mancioshell commented on Jan 27, 2025

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