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module Riemann
class Event
require 'set'
include Beefcake::Message
optional :time, :int64, 1
optional :state, :string, 2
optional :service, :string, 3
optional :host, :string, 4
optional :description, :string, 5
repeated :tags, :string, 7
optional :ttl, :float, 8
repeated :attributes, Attribute, 9
optional :metric_sint64, :sint64, 13
optional :metric_d, :double, 14
optional :metric_f, :float, 15
# Fields which don't really exist in protobufs, but which are reserved
# and can't be used as attributes.
VIRTUAL_FIELDS = Set.new([:metric])
# Fields which are specially encoded in the Event protobuf--that is, they
# can't be used as attributes.
RESERVED_FIELDS = fields.map do |i, field|
field.name.to_sym
end.reduce(VIRTUAL_FIELDS) do |set, field|
set << field
end
# Average a set of states together. Chooses the mean metric, the mode
# state, mode service, and the mean time. If init is provided, its values
# override (where present) the computed ones.
def self.average(states, init = Event.new)
init = case init
when Event
init.dup
else
Event.new init
end
# Metric
init.metric_f ||= states.inject(0.0) { |a, state|
a + (state.metric || 0)
} / states.size
if init.metric_f.nan?
init.metric_f = 0.0
end
# Event
init.state ||= mode states.map(&:state)
init.service ||= mode states.map(&:service)
# Time
init.time = begin
times = states.map(&:time).compact
(times.inject(:+) / times.size).to_i
rescue
end
init.time ||= Time.now.to_i
init
end
# Sum a set of states together. Adds metrics, takes the mode state, mode
# service and the mean time. If init is provided, its values override
# (where present) the computed ones.
def self.sum(states, init = Event.new)
init = case init
when Event
init.dup
else
Event.new init
end
# Metric
init.metric_f ||= states.inject(0.0) { |a, state|
a + (state.metric || 0)
}
if init.metric_f.nan?
init.metric_f = 0.0
end
# Event
init.state ||= mode states.map(&:state)
init.service ||= mode states.map(&:service)
# Time
init.time = begin
times = states.map(&:time).compact
(times.inject(:+) / times.size).to_i
rescue
end
init.time ||= Time.now.to_i
init
end
# Finds the maximum of a set of states. Metric is the maximum. Event is the
# highest, as defined by Dash.config.state_order. Time is the mean.
def self.max(states, init = Event.new)
init = case init
when Event
init.dup
else
Event.new init
end
# Metric
init.metric_f ||= states.inject(0.0) { |a, state|
a + (state.metric || 0)
}
if init.metric.nan?
init.metric = 0.0
end
# Event
init.state ||= states.inject(nil) do |max, state|
state.state if Dash.config[:state_order][state.state] > Dash.config[:state_order][max]
end
# Time
init.time = begin
times = states.map(&:time).compact
(times.inject(:+) / times.size).to_i
rescue
end
init.time ||= Time.now.to_i
init
end
def self.mode(array)
array.inject(Hash.new(0)) do |counts, e|
counts[e] += 1
counts
end.sort_by { |e, count| count }.last.first rescue nil
end
# Partition a list of states by a field
# Returns a hash of field_value => state
def self.partition(states, field)
states.inject({}) do |p, state|
k = state.send field
if p.include? k
p[k] << state
else
p[k] = [state]
end
p
end
end
# Sorts states by a field. nil values first.
def self.sort(states, field)
states.sort do |a, b|
a = a.send field
b = b.send field
if a.nil?
-1
elsif b.nil?
1
else
a <=> b
end
end
end
def initialize(hash = nil)
if hash
if hash[:metric]
super hash
self.metric = hash[:metric]
else
super hash
end
# Add extra attributes to the event as Attribute instances with values
# converted to String
self.attributes = hash.map do |key, value|
unless RESERVED_FIELDS.include? key.to_sym
Attribute.new(:key => key.to_s,
:value => (hash[key] || hash[key.to_sym]).to_s)
end
end.compact
else
super()
end
@time ||= Time.now.to_i
end
def metric
metric_d ||
metric_sint64 ||
metric_f
end
def metric=(m)
if Integer === m and (-(2**63)...2**63) === m
# Long
self.metric_sint64 = m
self.metric_f = m.to_f
else
self.metric_d = m.to_f
self.metric_f = m.to_f
end
end
# Look up attributes
def [](k)
if RESERVED_FIELDS.include? k.to_sym
super
else
r = attributes.find {|a| a.key.to_s == k.to_s }.value
end
end
# Set attributes
def []=(k, v)
if RESERVED_FIELDS.include? k.to_sym
super
else
a = self.attributes.find {|a| a.key == k.to_s }
if(a)
a.value = v.to_s
else
self.attributes << Attribute.new(:key => k.to_s, :value => v.to_s)
end
end
end
end
end
|
