Class: Influxer::Metrics

Inherits:
Object
  • Object
show all
Extended by:
ActiveModel::Callbacks
Includes:
ActiveModel::Model, ActiveModel::Validations, ActiveModel3::Model, Scoping, TimestampQuoting
Defined in:
lib/influxer/metrics/metrics.rb

Overview

Base class for InfluxDB querying and writing rubocop:disable Metrics/ClassLength

Constant Summary collapse

TIME_FACTOR = 
1_000_000_000

Constants included from TimestampQuoting

TimestampQuoting::DEFAULT_PRECISION, TimestampQuoting::TIME_FACTORS

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from TimestampQuoting

#factorize_timestamp, #quote_timestamp, #quote_timestamp_for_write, #quote_timestamp_with_suffix

Constructor Details

#initialize(attributes = {}) ⇒ Metrics

Returns a new instance of Metrics.



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# File 'lib/influxer/metrics/metrics.rb', line 152

def initialize(attributes = {})
  @attributes = {}
  @persisted = false
  super
end

Class Attribute Details

.database ⇒ Object (readonly)

Returns the value of attribute database.



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# File 'lib/influxer/metrics/metrics.rb', line 43

def database
  @database
end

.precision ⇒ Object (readonly)

Returns the value of attribute precision.



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# File 'lib/influxer/metrics/metrics.rb', line 43

def precision
  @precision
end

.retention_policy ⇒ Object (readonly)

Returns the value of attribute retention_policy.



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# File 'lib/influxer/metrics/metrics.rb', line 43

def retention_policy
  @retention_policy
end

.series ⇒ Object (readonly)

Returns the value of attribute series.



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# File 'lib/influxer/metrics/metrics.rb', line 43

def series
  @series
end

.tag_names ⇒ Object

Returns the value of attribute tag_names.



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# File 'lib/influxer/metrics/metrics.rb', line 44

def tag_names
  @tag_names
end

Instance Attribute Details

#timestamp ⇒ Object

Returns the value of attribute timestamp.



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# File 'lib/influxer/metrics/metrics.rb', line 150

def timestamp
  @timestamp
end

Class Method Details

.all ⇒ Object

rubocop:enable Metrics/MethodLength rubocop:enable Metrics/AbcSize



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# File 'lib/influxer/metrics/metrics.rb', line 108

def all
  if current_scope
    current_scope.clone
  else
    default_scoped
  end
end

.attributes(*attrs) ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 46

def attributes(*attrs)
  attrs.each do |name|
    define_method("#{name}=") do |val|
      @attributes[name] = val
    end

    define_method(name.to_s) do
      @attributes[name]
    end
  end
end

.inherited(subclass) ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 68

def inherited(subclass)
  subclass.set_series
  subclass.tag_names = tag_names.nil? ? [] : tag_names.dup
end

.quote(name) ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 142

def quote(name)
  '"' + name.to_s.gsub(/\"/) { '\"' } + '"'
end

.quoted_series(val = @series, instance = nil, write: false) ⇒ Object

rubocop:disable Metrics/MethodLength rubocop:disable Metrics/AbcSize rubocop:disable Metrics/CyclomaticComplexity



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# File 'lib/influxer/metrics/metrics.rb', line 119

def quoted_series(val = @series, instance = nil, write: false)
  case val
  when Regexp
    val.inspect
  when Proc
    quoted_series(val.call(instance), write: write)
  when Array
    if val.length > 1
      "merge(#{val.map { |s| quoted_series(s, write: write) }.join(',')})"
    else
      quoted_series(val.first, write: write)
    end
  else
    # Only add retention policy when selecting points
    # and not writing
    if !write && retention_policy.present?
      [quote(@retention_policy), quote(val)].join('.')
    else
      quote(val)
    end
  end
end

.set_database(database) ⇒ Object

Use custom database for this metrics



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# File 'lib/influxer/metrics/metrics.rb', line 79

def set_database(database)
  @database = database
end

.set_precision(precision) ⇒ Object

Use custom precision for this metrics



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# File 'lib/influxer/metrics/metrics.rb', line 84

def set_precision(precision)
  @precision = precision
end

.set_retention_policy(policy_name) ⇒ Object

Use custom retention policy



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# File 'lib/influxer/metrics/metrics.rb', line 74

def set_retention_policy(policy_name)
  @retention_policy = policy_name
end

.set_series(*args) ⇒ Object

rubocop:disable Metrics/MethodLength rubocop:disable Metrics/AbcSize



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# File 'lib/influxer/metrics/metrics.rb', line 90

def set_series(*args)
  if args.empty?
    matches = to_s.match(/^(.*)Metrics$/)
    @series =
      if matches.nil?
        superclass.respond_to?(:series) ? superclass.series : to_s.underscore
      else
        matches[1].split("::").join("_").underscore
      end
  elsif args.first.is_a?(Proc)
    @series = args.first
  else
    @series = args
  end
end

.tag?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/influxer/metrics/metrics.rb', line 64

def tag?(name)
  tag_names.include?(name.to_s)
end

.tags(*attrs) ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 58

def tags(*attrs)
  attributes(*attrs)
  self.tag_names ||= []
  self.tag_names += attrs.map(&:to_s)
end

Instance Method Details

#client ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 195

def client
  Influxer.client
end

#dup ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 199

def dup
  self.class.new(@attributes)
end

#persisted? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/influxer/metrics/metrics.rb', line 187

def persisted?
  @persisted
end

#series(**options) ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 191

def series(**options)
  self.class.quoted_series(self.class.series, self, **options)
end

#tag_names ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 213

def tag_names
  self.class.tag_names
end

#tags ⇒ Object

Returns hash with metrics tags



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# File 'lib/influxer/metrics/metrics.rb', line 209

def tags
  @attributes.select { |k, _| tag_names.include?(k.to_s) }
end

#values ⇒ Object

Returns hash with metrics values



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# File 'lib/influxer/metrics/metrics.rb', line 204

def values
  @attributes.reject { |k, _| tag_names.include?(k.to_s) }
end

#write ⇒ Object

Raises:



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# File 'lib/influxer/metrics/metrics.rb', line 158

def write
  raise MetricsError if persisted?

  return false if invalid?

  run_callbacks :write do
    write_point
  end
  self
end

#write! ⇒ Object

Raises:



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# File 'lib/influxer/metrics/metrics.rb', line 169

def write!
  raise MetricsInvalid if invalid?
  write
end

#write_point ⇒ Object 



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# File 'lib/influxer/metrics/metrics.rb', line 174

def write_point
  data = {
    values: values,
    tags: tags,
    timestamp: parsed_timestamp
  }
  write_with_config(
    unquote(series(write: true)),
    data
  )
  @persisted = true
end