Json-console

Create a LoggerConfig preset for structured JSON output on the console. This preset is intended for config-driven logging pipelines that want machine-readable terminal output.

Interface

pub fn json_console(
  min_level~ : Level = Level::Info,
  target~ : String = "",
  timestamp~ : Bool = false,
) -> LoggerConfig {

input

• min_level : Level - Minimum enabled level for the preset.
• target : String - Default target stored in the returned config.
• timestamp : Bool - Whether emitted records should include timestamps.

output

• LoggerConfig - Config using SinkKind::JsonConsole with no queue wrapper by default.

Explanation

Detailed rules explaining key parameters and behaviors

• This preset always returns sink.kind=SinkKind::JsonConsole.
• queue=None by default, so JSON records are not buffered unless with_queue(...) is added later.
• The preset does not carry file-only fields such as path or rotation in a meaningful way because the sink kind is not file-based.

How to Use

Here are some specific examples provided.

When Need Structured Console Output

When logs should be easy to collect or parse from stdout:

let config = json_console(min_level=Level::Info, target="api", timestamp=true)
let logger = build_logger(config)

In this example, records are emitted through the JSON console sink.

And timestamps are enabled at the top-level logger config.

Error Case

e.g.:

• If target is empty, the preset still returns a valid config.

• If you need file rotation or file paths, this preset is the wrong sink shape and should be replaced with file(...).

Notes

1. Use this preset when downstream tooling expects structured console logs.

2. with_file_rotation(...) does not change this preset because it only applies to file configs.