55 lines
1.3 KiB
Ruby
55 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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# Released under the MIT License.
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# Copyright, 2024, by Samuel Williams.
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module Metrics
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# Represents a configuration for the metrics library.
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class Config
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DEFAULT_PATH = ENV.fetch("METRICS_CONFIG_DEFAULT_PATH", "config/metrics.rb")
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# Load the configuration from the given path.
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# @parameter path [String] The path to the configuration file.
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# @returns [Config] The loaded configuration.
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def self.load(path)
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config = self.new
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if File.exist?(path)
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config.instance_eval(File.read(path), path)
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end
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return config
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end
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# Load the default configuration.
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# @returns [Config] The default configuration.
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def self.default
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@default ||= self.load(DEFAULT_PATH)
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end
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# Prepare the backend, e.g. by loading additional libraries or instrumentation.
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def prepare
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end
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# Require a specific metrics backend implementation.
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def require_backend(env = ENV)
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if backend = env["METRICS_BACKEND"]
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begin
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if require(backend)
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Metrics.extend(Backend::Interface)
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return true
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end
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rescue LoadError => error
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warn "Unable to load metrics backend: #{backend.inspect}!"
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end
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end
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return false
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end
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# Load the default configuration.
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DEFAULT = self.default
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end
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end
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