Meter provider to write to the standard output or standard error or to a file

Writes metrics measurements to the standard output or error, or to a file. Useful for debugging.

Value

meter_provider_stdstream$new() returns an otel::otel_meter_provider object.

meter_provider_stdstream$options() returns a named list, the current values of the options.

Usage

Externally:

OTEL_METRICS_EXPORTER=console
OTEL_METRICS_EXPORTER=stderr

From R:

meter_provider_stdstream$new(opts = NULL)
meter_provider_stdstream$options()

Arguments

opts: Named list of options. See below.

Options

Standard stream exporter options

• output: where to write the output. Can be

  • "stdout": write output to the standard output,

  • "stderr": write output to the standard error,

  • another string: write output to a file. (To write output to a file named "stdout" or "stderr", use a ./ prefix.)

  Value is set from

  • the opts argument, or

  • the OTEL_R_EXPORTER_STDSTREAM_METRICS_OUTPUT environment variable, or

  • the OTEL_R_EXPORTER_STDSTREAM_OUTPUT environment variable, or

  • the default is "stdout".

Metric reader options

• export_interval: the time interval between the start of two export attempts, in milliseconds. Value is set from

  • the opts argument, or

  • the OTEL_METRIC_EXPORT_INTERVAL environment variable, or

  • the default is 60000.

• export_timeout: Maximum allowed time to export data, in milliseconds. Value is set from

  • the opts argument, or

  • the OTEL_METRIC_EXPORT_TIMEOUT environment variable, or

  • the default is 30000.

Examples

meter_provider_stdstream$options()
#> $output
#> [1] "stdout"
#> 
#> $export_interval
#> [1] 60000
#> 
#> $export_timeout
#> [1] 30000
#>