NAME

Metrics::Any::Adapter::File - write metrics to a file

SYNOPSIS

use Metrics::Any::Adapter 'File', path => "metrics.log";

DESCRIPTION

This Metrics::Any adapter type writes observations of metric values into a file. This may be helpful while debugging or otherwise testing code that reports metrics.

For example, by setting the METRICS_ANY_ADAPTER environment variable to configure the adapter, a metric log will be written as a side-effect of running a unit test:

$ METRICS_ANY_ADAPTER=File:path=metrics.log perl -Mblib t/01test.t

The generated file can then be inspected to see what metric values were reported while the program was running.

In particular, specifying the file /dev/null allows the full metrics generation path to be tested with the code under test seeing a "real" adapter even though the output goes nowhere.

$ METRICS_ANY_ADAPTER=File:path=/dev/null ./Build test

Distribution and timing metrics are tracked with a running total and count of observations.

ARGUMENTS

The following additional arguments are recognised

path

The path to the file to write to.

AUTHOR

Paul Evans <leonerd@leonerd.org.uk>