Class: Blazer::Result
- Inherits:
-
Object
- Object
- Blazer::Result
- Defined in:
- lib/blazer/result.rb
Instance Attribute Summary collapse
-
#cached_at ⇒ Object
readonly
Returns the value of attribute cached_at.
-
#columns ⇒ Object
readonly
Returns the value of attribute columns.
-
#data_source ⇒ Object
readonly
Returns the value of attribute data_source.
-
#error ⇒ Object
readonly
Returns the value of attribute error.
-
#just_cached ⇒ Object
readonly
Returns the value of attribute just_cached.
-
#rows ⇒ Object
readonly
Returns the value of attribute rows.
Instance Method Summary collapse
- #anomaly?(series) ⇒ Boolean
- #boom ⇒ Object
- #cached? ⇒ Boolean
- #chart_type ⇒ Object
- #column_types ⇒ Object
- #detect_anomaly ⇒ Object
-
#initialize(data_source, columns, rows, error, cached_at, just_cached) ⇒ Result
constructor
A new instance of Result.
- #timed_out? ⇒ Boolean
Constructor Details
#initialize(data_source, columns, rows, error, cached_at, just_cached) ⇒ Result
Returns a new instance of Result.
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# File 'lib/blazer/result.rb', line 5 def initialize(data_source, columns, rows, error, cached_at, just_cached) @data_source = data_source @columns = columns @rows = rows @error = error @cached_at = cached_at @just_cached = just_cached end |
Instance Attribute Details
#cached_at ⇒ Object (readonly)
Returns the value of attribute cached_at.
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# File 'lib/blazer/result.rb', line 3 def cached_at @cached_at end |
#columns ⇒ Object (readonly)
Returns the value of attribute columns.
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# File 'lib/blazer/result.rb', line 3 def columns @columns end |
#data_source ⇒ Object (readonly)
Returns the value of attribute data_source.
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# File 'lib/blazer/result.rb', line 3 def data_source @data_source end |
#error ⇒ Object (readonly)
Returns the value of attribute error.
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# File 'lib/blazer/result.rb', line 3 def error @error end |
#just_cached ⇒ Object (readonly)
Returns the value of attribute just_cached.
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# File 'lib/blazer/result.rb', line 3 def just_cached @just_cached end |
#rows ⇒ Object (readonly)
Returns the value of attribute rows.
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# File 'lib/blazer/result.rb', line 3 def rows @rows end |
Instance Method Details
#anomaly?(series) ⇒ Boolean
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# File 'lib/blazer/result.rb', line 119 def anomaly?(series) series = series.reject { |v| v[0].nil? }.sort_by { |v| v[0] } csv_str = CSV.generate do |csv| csv << ["timestamp", "count"] series.each do |row| csv << row end end r_script = %x[which Rscript].chomp type = series.any? && series.last.first.to_time - series.first.first.to_time >= 2.weeks ? "ts" : "vec" args = [type, csv_str] raise "R not found" if r_script.empty? command = "#{r_script} --vanilla #{File.("../detect_anomalies.R", __FILE__)} #{args.map { |a| Shellwords.escape(a) }.join(" ")}" output = %x[#{command}] if output.empty? raise "Unknown R error" end rows = CSV.parse(output, headers: true) error = rows.first && rows.first["x"] raise error if error = [] if type == "ts" rows.each do |row| << Time.parse(row["timestamp"]) end .include?(series.last[0].to_time) else rows.each do |row| << row["index"].to_i end .include?(series.length) end end |
#boom ⇒ Object
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# File 'lib/blazer/result.rb', line 22 def boom @boom ||= begin boom = {} columns.each_with_index do |key, i| query = data_source.smart_columns[key] if query values = rows.map { |r| r[i] }.compact.uniq result = data_source.run_statement(ActiveRecord::Base.send(:sanitize_sql_array, [query.sub("{value}", "(?)"), values])) boom[key] = Hash[result.rows.map { |k, v| [k.to_s, v] }] end end boom end end |
#cached? ⇒ Boolean
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# File 'lib/blazer/result.rb', line 18 def cached? cached_at.present? end |
#chart_type ⇒ Object
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# File 'lib/blazer/result.rb', line 56 def chart_type @chart_type ||= begin if column_types.compact.size >= 2 && column_types.compact == ["time"] + (column_types.compact.size - 1).times.map { "numeric" } "line" elsif column_types == ["time", "string", "numeric"] "line2" elsif column_types.compact.size >= 2 && column_types == ["string"] + (column_types.compact.size - 1).times.map { "numeric" } "bar" elsif column_types == ["string", "string", "numeric"] "bar2" end end end |
#column_types ⇒ Object
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# File 'lib/blazer/result.rb', line 37 def column_types @column_types ||= begin columns.each_with_index.map do |k, i| v = (rows.find { |r| r[i] } || {})[i] if boom[k] "string" elsif v.is_a?(Numeric) "numeric" elsif v.is_a?(Time) || v.is_a?(Date) "time" elsif v.nil? nil else "string" end end end end |
#detect_anomaly ⇒ Object
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# File 'lib/blazer/result.rb', line 70 def detect_anomaly anomaly = nil = nil if rows.empty? = "No data" else if chart_type == "line" || chart_type == "line2" series = [] if chart_type == "line" columns[1..-1].each_with_index.each do |k, i| series << {name: k, data: rows.map{ |r| [r[0], r[i + 1]] }} end else rows.group_by { |r| v = r[1]; (boom[columns[1]] || {})[v.to_s] || v }.each_with_index.map do |(name, v), i| series << {name: name, data: v.map { |v2| [v2[0], v2[2]] }} end end current_series = nil begin anomalies = [] series.each do |s| current_series = s[:name] anomalies << s[:name] if anomaly?(s[:data]) end anomaly = anomalies.any? if anomaly if anomalies.size == 1 = "Anomaly detected in #{anomalies.first}" else = "Anomalies detected in #{anomalies.to_sentence}" end else = "No anomalies detected" end rescue => e = "#{current_series}: #{e.}" raise e if Rails.env.development? end else = "Bad format" end end [anomaly, ] end |
#timed_out? ⇒ Boolean
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# File 'lib/blazer/result.rb', line 14 def timed_out? error == Blazer::TIMEOUT_MESSAGE end |