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Versions: 11
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Contents
# frozen_string_literal: true
module PrometheusExporter::Metric
class Base
# prefix applied to all metrics
def self.default_prefix=(name)
@default_prefix = name
end
def self.default_prefix
@default_prefix.to_s
end
def self.default_labels=(labels)
@default_labels = labels
end
def self.default_labels
@default_labels || {}
end
attr_accessor :help, :name, :data
def initialize(name, help)
@name = name
@help = help
end
def type
raise "Not implemented"
end
def metric_text
raise "Not implemented"
end
def from_json(json)
json = JSON.parse(json) if String === json
@name = json["name"]
@help = json["help"]
@data = json["data"]
if Hash === json["data"]
@data = {}
json["data"].each do |k, v|
k = JSON.parse(k)
k = Hash[k.map { |k1, v1| [k1.to_sym, v1] }]
@data[k] = v
end
end
end
def prefix(name)
Base.default_prefix + name
end
def labels_text(labels)
labels = (labels || {}).merge(Base.default_labels)
if labels && labels.length > 0
s = labels.map do |key, value|
"#{key}=\"#{value}\""
end.join(",")
"{#{s}}"
end
end
def to_prometheus_text
<<~TEXT
# HELP #{prefix(name)} #{help}
# TYPE #{prefix(name)} #{type}
#{metric_text}
TEXT
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems