structured arguments + nested keys ("a.b.c") produce 'flat' JSON output

[nouknouk]

Hi,

I'm using structured arguments:

logger.info("foo txt {}", value("bar.foo", 42));

This is a very, very convenient way for the developer to structure value in his logs with an efficient syntax.

This produces the following json output:

{
  "bar.foo":  42
}

I wonder if there is any way to make encoder produce instead:

{
  "bar": {
    "foo": 42
  }
}

Without the (less convenient) need of writing intermediate objects (JsonNode, ...) to pass to the logger.

Regards.

[philsttr]

That is not possible currently. I'm also hesitant to introduce this functionality in logstash-logback-encoder, since it will require some complex parsing and grouping logic.

I'd recommend using Maps as intermediaries.

logger.info("foo txt {}", value("bar", Map.of("foo", 42)));