log: Logging functions

In Appsilon/rhino: A Framework for Enterprise Shiny Applications

Logging functions

Description

Convenient way to log messages at a desired severity level.

Usage

log

Format

An object of class list of length 7.

Details

The log object is a list of logging functions, in order of decreasing severity:

1. fatal

2. error

3. warn

4. success

5. info

6. debug

7. trace

Rhino configures logging based on settings read from the config.yml file in the root of your project:

1. rhino_log_level: The minimum severity of messages to be logged.

2. rhino_log_file: The file to save logs to. If NA, standard error stream will be used.

The default config.yml file uses ⁠!expr Sys.getenv()⁠ so that log level and file can also be configured by setting the RHINO_LOG_LEVEL and RHINO_LOG_FILE environment variables.

The functions re-exported by the log object are aliases for {logger} functions. You can also import the package and use it directly to utilize its full capabilities.

Examples

## Not run: 
  box::use(rhino[log])

  # Messages can be formatted using glue syntax.
  name <- "Rhino"
  log$warn("Hello {name}!")
  log$info("{1:3} + {1:3} = {2 * (1:3)}")

## End(Not run)

Appsilon/rhino documentation built on April 14, 2025, 7:07 p.m.