Using dynamic value in google_pubsub filter plugin attributes field

[Altiano_Gerung]

Hi all,

I don't know how to give a dynamic value to this attributes field in google_pubsub output plugin.

Currently this is what I do, which is not DRY

output {
  if [name] == "userRegistered" {
    google_pubsub {
      project_id => "a"
      topic => "ab"
      json_key_file => "abc"
      attributes => {
        "eventName" => "userRegistered"
      }
    }
  }
}

This one tho, won't work, even tho the conditional statement can read from the name field

output {
  if [name] == "userRegistered" {
    google_pubsub {
      project_id => "a"
      topic => "ab"
      json_key_file => "abc"
      attributes => {
        "eventNameA" => "%{[name]}"
        "eventNameB" => "%{name}"
        "eventNameC" => "[name]"
      }
    }
  }
}

What am I missing here?

[Badger]

The output does not sprintf the attributes, so you cannot use a sprintf reference.

[Altiano_Gerung]

So there's no way to make it dynamic?

[Badger]

With the existing plugin I do not think it can be done. You could change this line from

attributes.each { |k, v| builder.putAttributes(k, v) }

to

attributes.each { |k, v| builder.putAttributes(k, event.sprintf(v)) }

and rebuild the plugin from source. Or submit a PR that does that, or open an issue on github requesting that someone else do so

If doing either of the latter then you might want to consider whether anyone on the planet would consider it useful to sprintf both k and v!

attributes.each { |k, v| builder.putAttributes(event.sprintf(k), event.sprintf(v)) }