Record and LogLine

Baker operates on objects called “records”, an abstraction over integer-indexable structured data.

Baker processes objects called records. A Record, in Baker, is an interface that provides an abstraction over a record of structured data, where fields are indexed and accessed via integers.

At the moment, Baker provides a single implementation of the Record interface, called LogLine. If LogLine doesn’t fit your needs, you can implement the Record interface or modify LogLine. See the custom Record how-to for more details about implementing the Record interface from scratch.


A LogLine is an implementation of the Record interface which is highly optimized for fast parsing and serializing of CSV records. It supports any single-byte field separator and doesn’t handle quotes (neither single nor double).

The maximum number of fields is hard-coded by the LogLineNumFields constant which is 3000. 100 extra fields can be stored at runtime in a LogLine (also hardcoded with NumFieldsBaker), these extra fields are a fast way to exchange data between filters and/or outputs but they are neither handled during Parsing (i.e LogLine.Parse) nor serialization (LogLine.ToText).

Custom LogLine

If the hardcoded values for LogLineNumFields and NumFieldsBaker do not suit your needs, you can copy logline.go in your project and modify the constants declared at the top of the file.

Your specialized LogLine will still implement baker.Record and thus can be used in lieu of baker.LogLine. The CreateRecord function set into baker.Components must return an instance of your custom LogLine instead of the default one.

Last modified October 29, 2020