module Blazer
Constants
- BELONGS_TO_OPTIONAL
- TIMEOUT_ERRORS
- TIMEOUT_MESSAGE
- VERSION
Attributes
anomaly_checks[RW]
async[RW]
audit[RW]
before_action[RW]
cache[RW]
check_schedules[RW]
from_email[RW]
images[RW]
override_csp[RW]
query_editable[RW]
query_viewable[RW]
slack_webhook_url[RW]
time_zone[R]
transform_statement[RW]
user_class[W]
user_method[W]
user_name[RW]
Public Class Methods
adapters()
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# File lib/blazer.rb, line 205 def self.adapters @adapters ||= {} end
data_sources()
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# File lib/blazer.rb, line 97 def self.data_sources @data_sources ||= begin ds = Hash[ settings["data_sources"].map do |id, s| [id, Blazer::DataSource.new(id, s)] end ] ds.default = ds.values.first ds # TODO Blazer 2.0 # ds2 = Hash.new { |hash, key| raise Blazer::Error, "Unknown data source: #{key}" } # ds.each do |k, v| # ds2[k] = v # end # ds2 end end
extract_vars(statement)
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# File lib/blazer.rb, line 116 def self.extract_vars(statement) # strip commented out lines # and regex {1} or {1,2} statement.gsub(/\-\-.+/, "").gsub(/\/\*.+\*\//m, "").scan(/\{\w*?\}/i).map { |v| v[1...-1] }.reject { |v| /\A\d+(\,\d+)?\z/.match(v) || v.empty? }.uniq end
register_adapter(name, adapter)
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# File lib/blazer.rb, line 209 def self.register_adapter(name, adapter) adapters[name] = adapter end
run_check(check)
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# File lib/blazer.rb, line 131 def self.run_check(check) tries = 1 ActiveSupport::Notifications.instrument("run_check.blazer", check_id: check.id, query_id: check.query.id, state_was: check.state) do |instrument| # try 3 times on timeout errors data_source = data_sources[check.query.data_source] statement = check.query.statement Blazer.transform_statement.call(data_source, statement) if Blazer.transform_statement while tries <= 3 result = data_source.run_statement(statement, refresh_cache: true, check: check, query: check.query) if result.timed_out? Rails.logger.info "[blazer timeout] query=#{check.query.name}" tries += 1 sleep(10) elsif result.error.to_s.start_with?("PG::ConnectionBad") data_source.reconnect Rails.logger.info "[blazer reconnect] query=#{check.query.name}" tries += 1 sleep(10) else break end end begin check.reload # in case state has changed since job started check.update_state(result) rescue ActiveRecord::RecordNotFound # check deleted end # TODO use proper logfmt Rails.logger.info "[blazer check] query=#{check.query.name} state=#{check.state} rows=#{result.rows.try(:size)} error=#{result.error}" instrument[:statement] = statement instrument[:data_source] = data_source instrument[:state] = check.state instrument[:rows] = result.rows.try(:size) instrument[:error] = result.error instrument[:tries] = tries end end
run_checks(schedule: nil)
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# File lib/blazer.rb, line 122 def self.run_checks(schedule: nil) checks = Blazer::Check.includes(:query) checks = checks.where(schedule: schedule) if schedule checks.find_each do |check| next if check.state == "disabled" Safely.safely { run_check(check) } end end
send_failing_checks()
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# File lib/blazer.rb, line 175 def self.send_failing_checks emails = {} slack_channels = {} Blazer::Check.includes(:query).where(state: ["failing", "error", "timed out", "disabled"]).find_each do |check| check.split_emails.each do |email| (emails[email] ||= []) << check end check.split_slack_channels.each do |channel| (slack_channels[channel] ||= []) << check end end emails.each do |email, checks| Safely.safely do Blazer::CheckMailer.failing_checks(email, checks).deliver_now end end slack_channels.each do |channel, checks| Safely.safely do Blazer::SlackNotifier.failing_checks(channel, checks) end end end
settings()
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# File lib/blazer.rb, line 86 def self.settings @settings ||= begin path = Rails.root.join("config", "blazer.yml").to_s if File.exist?(path) YAML.load(ERB.new(File.read(path)).result) else {} end end end
slack?()
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# File lib/blazer.rb, line 201 def self.slack? slack_webhook_url.present? end
time_zone=(time_zone)
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# File lib/blazer.rb, line 65 def self.time_zone=(time_zone) @time_zone = time_zone.is_a?(ActiveSupport::TimeZone) ? time_zone : ActiveSupport::TimeZone[time_zone.to_s] end
user_class()
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# File lib/blazer.rb, line 69 def self.user_class if !defined?(@user_class) @user_class = settings.key?("user_class") ? settings["user_class"] : (User.name rescue nil) end @user_class end
user_method()
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# File lib/blazer.rb, line 76 def self.user_method if !defined?(@user_method) @user_method = settings["user_method"] if user_class @user_method ||= "current_#{user_class.to_s.downcase.singularize}" end end @user_method end