Transformer

A transformer node references a transformer, which will execute it on a log record and pass the result to the next nodes.

NB: Transformer nodes references transformers by their unique name. If a transformer is updated, all transformer nodes referencing it will be invalidated.

Example

Let's assume we have a transformer named from-json with the following source code:

. = parse_json!(.content)

{
  "timestamp": "...",
  "fields": {
    "content": "{\"foo\": \"bar\"}"
  }
}

⇓

⇓

{
  "timestamp": "...",
  "fields": {
    "foo": "bar"
  }
}