Add another method for adding static field to GelfEncoder about logback-gelf HOT 2 CLOSED

I don't exactly understand your use case. If you're using the API (not the XML configuration) you could easily use a custom field mapper for this. See #78 for example. Doing so programmatically is even simpler:

GelfEncoder e = new GelfEncoder();
e.addFieldMapper((event, valueHandler) -> valueHandler.accept("MY_KEY", "MY_VALUE"));

The static fields are a very basic (and limited) concept mainly for XML based configuration.

from logback-gelf.

Yes, I am using the API. In versions <=3.0.0 I was using the setStaticFields(Map<String, Object> staticFields) method in GelfEncoder initialization.

I did not want to use field mapper, because then all static fields keys are validated in the addField() method for each message, which seems redundant to me (keys will be the same). When addStaticField(String staticField) method is used, key validation is performed only during adding static field.

I just thought it could be useful for someone who was using setStaticFields() method in <=3.0.0 versions (reintroducing setStaticFields() could be another option).

If you think, it is not worth it, then issue can be closed. I am perfectly fine with the existing methods for setting static fields.

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