Module: Blazer

Defined in:
lib/blazer.rb,
lib/blazer/engine.rb,
lib/blazer/result.rb,
lib/blazer/version.rb,
lib/blazer/statement.rb,
lib/blazer/data_source.rb,
app/models/blazer/audit.rb,
app/models/blazer/check.rb,
app/models/blazer/query.rb,
lib/blazer/check_mailer.rb,
lib/blazer/result_cache.rb,
app/models/blazer/record.rb,
app/models/blazer/upload.rb,
lib/blazer/run_statement.rb,
lib/blazer/slack_notifier.rb,
app/models/blazer/dashboard.rb,
app/models/blazer/connection.rb,
lib/blazer/run_statement_job.rb,
app/helpers/blazer/base_helper.rb,
lib/blazer/adapters/sql_adapter.rb,
lib/blazer/adapters/base_adapter.rb,
lib/blazer/adapters/hive_adapter.rb,
lib/blazer/adapters/soda_adapter.rb,
app/models/blazer/dashboard_query.rb,
lib/blazer/adapters/drill_adapter.rb,
lib/blazer/adapters/druid_adapter.rb,
lib/blazer/adapters/neo4j_adapter.rb,
lib/blazer/adapters/spark_adapter.rb,
lib/blazer/adapters/athena_adapter.rb,
lib/blazer/adapters/ignite_adapter.rb,
lib/blazer/adapters/presto_adapter.rb,
app/models/blazer/uploads_connection.rb,
lib/blazer/adapters/bigquery_adapter.rb,
lib/blazer/adapters/influxdb_adapter.rb,
lib/blazer/adapters/cassandra_adapter.rb,
lib/blazer/adapters/snowflake_adapter.rb,
app/controllers/blazer/base_controller.rb,
lib/blazer/adapters/opensearch_adapter.rb,
lib/blazer/adapters/salesforce_adapter.rb,
lib/generators/blazer/install_generator.rb,
lib/generators/blazer/uploads_generator.rb,
app/controllers/blazer/checks_controller.rb,
app/controllers/blazer/queries_controller.rb,
app/controllers/blazer/uploads_controller.rb,
lib/blazer/adapters/elasticsearch_adapter.rb,
app/controllers/blazer/dashboards_controller.rb

Defined Under Namespace

Modules: Adapters, BaseHelper, Generators Classes: Audit, BaseController, Check, CheckMailer, ChecksController, Connection, Dashboard, DashboardQuery, DashboardsController, DataSource, Engine, Error, QueriesController, Query, Record, Result, ResultCache, RunStatement, RunStatementJob, SlackNotifier, Statement, TimeoutNotSupported, Upload, UploadError, UploadsConnection, UploadsController

Constant Summary collapse

VARIABLE_MESSAGE = 
"Variable cannot be used in this position"
TIMEOUT_MESSAGE = 
"Query timed out :("
TIMEOUT_ERRORS = 
[
  "canceling statement due to statement timeout", # postgres
  "canceling statement due to conflict with recovery", # postgres
  "cancelled on user's request", # redshift
  "canceled on user's request", # redshift
  "system requested abort", # redshift
  "maximum statement execution time exceeded" # mysql
]
VERSION = 
"3.1.0"

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.anomaly_checks ⇒ Object

Returns the value of attribute anomaly_checks.



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# File 'lib/blazer.rb', line 66

def anomaly_checks
  @anomaly_checks
end

.async ⇒ Object

Returns the value of attribute async.



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# File 'lib/blazer.rb', line 68

def async
  @async
end

.audit ⇒ Object

Returns the value of attribute audit.



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# File 'lib/blazer.rb', line 55

def audit
  @audit
end

.before_action ⇒ Object

Returns the value of attribute before_action.



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# File 'lib/blazer.rb', line 60

def before_action
  @before_action
end

.cache ⇒ Object

Returns the value of attribute cache.



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# File 'lib/blazer.rb', line 62

def cache
  @cache
end

.check_schedules ⇒ Object

Returns the value of attribute check_schedules.



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# File 'lib/blazer.rb', line 65

def check_schedules
  @check_schedules
end

.forecasting ⇒ Object

Returns the value of attribute forecasting.



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# File 'lib/blazer.rb', line 67

def forecasting
  @forecasting
end

.from_email ⇒ Object

Returns the value of attribute from_email.



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# File 'lib/blazer.rb', line 61

def from_email
  @from_email
end

.images ⇒ Object

Returns the value of attribute images.



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# File 'lib/blazer.rb', line 69

def images
  @images
end

.mapbox_access_token ⇒ Object

Returns the value of attribute mapbox_access_token.



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# File 'lib/blazer.rb', line 73

def mapbox_access_token
  @mapbox_access_token
end

.override_csp ⇒ Object

Returns the value of attribute override_csp.



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# File 'lib/blazer.rb', line 70

def override_csp
  @override_csp
end

.slack_oauth_token ⇒ Object

Returns the value of attribute slack_oauth_token.



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# File 'lib/blazer.rb', line 71

def slack_oauth_token
  @slack_oauth_token
end

.slack_webhook_url ⇒ Object

Returns the value of attribute slack_webhook_url.



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# File 'lib/blazer.rb', line 72

def slack_webhook_url
  @slack_webhook_url
end

.time_zone ⇒ Object

Returns the value of attribute time_zone.



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# File 'lib/blazer.rb', line 56

def time_zone
  @time_zone
end

.transform_statement ⇒ Object

Returns the value of attribute transform_statement.



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# File 'lib/blazer.rb', line 63

def transform_statement
  @transform_statement
end

.transform_variable ⇒ Object

Returns the value of attribute transform_variable.



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# File 'lib/blazer.rb', line 64

def transform_variable
  @transform_variable
end

.user_class ⇒ Object 



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# File 'lib/blazer.rb', line 99

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 ⇒ Object 



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# File 'lib/blazer.rb', line 106

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

.user_name ⇒ Object

Returns the value of attribute user_name.



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# File 'lib/blazer.rb', line 57

def user_name
  @user_name
end

Class Method Details

.adapters ⇒ Object 



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# File 'lib/blazer.rb', line 242

def self.adapters
  @adapters ||= {}
end

.anomaly_detectors ⇒ Object 



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# File 'lib/blazer.rb', line 250

def self.anomaly_detectors
  @anomaly_detectors ||= {}
end

.archive_queries ⇒ Object 



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# File 'lib/blazer.rb', line 266

def self.archive_queries
  raise "Audits must be enabled to archive" unless Blazer.audit
  raise "Missing status column - see https://github.com/ankane/blazer#23" unless Blazer::Query.column_names.include?("status")

  viewed_query_ids = Blazer::Audit.where("created_at > ?", 90.days.ago).group(:query_id).count.keys.compact
  Blazer::Query.active.where.not(id: viewed_query_ids).update_all(status: "archived")
end

.data_sources ⇒ Object 



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# File 'lib/blazer.rb', line 127

def self.data_sources
  @data_sources ||= begin
    ds = Hash.new { |hash, key| raise Blazer::Error, "Unknown data source: #{key}" }
    settings["data_sources"].each do |id, s|
      ds[id] = Blazer::DataSource.new(id, s)
    end
    ds
  end
end

.forecasters ⇒ Object 



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# File 'lib/blazer.rb', line 258

def self.forecasters
  @forecasters ||= {}
end

.maps? ⇒ Boolean

TODO show warning on invalid access token

Returns:

  • (Boolean) 


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# File 'lib/blazer.rb', line 221

def self.maps?
  mapbox_access_token.present? && mapbox_access_token.start_with?("pk.")
end

.monotonic_time ⇒ Object

private



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# File 'lib/blazer.rb', line 275

def self.monotonic_time
  Process.clock_gettime(Process::CLOCK_MONOTONIC)
end

.register_adapter(name, adapter) ⇒ Object 



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# File 'lib/blazer.rb', line 246

def self.register_adapter(name, adapter)
  adapters[name] = adapter
end

.register_anomaly_detector(name, &anomaly_detector) ⇒ Object 



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# File 'lib/blazer.rb', line 254

def self.register_anomaly_detector(name, &anomaly_detector)
  anomaly_detectors[name] = anomaly_detector
end

.register_forecaster(name, &forecaster) ⇒ Object 



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# File 'lib/blazer.rb', line 262

def self.register_forecaster(name, &forecaster)
  forecasters[name] = forecaster
end

.run_check(check) ⇒ Object 



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# File 'lib/blazer.rb', line 146

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
    statement = check.query.statement_object
    data_source = statement.data_source

    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}"

    # should be no variables
    instrument[:statement] = statement.bind_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) ⇒ Object 



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# File 'lib/blazer.rb', line 137

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 ⇒ Object 



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# File 'lib/blazer.rb', line 190

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 ⇒ Object 



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# File 'lib/blazer.rb', line 116

def self.settings
  @settings ||= begin
    path = Rails.root.join("config", "blazer.yml").to_s
    if File.exist?(path)
      YAML.safe_load(ERB.new(File.read(path)).result, aliases: true)
    else
      {}
    end
  end
end

.slack? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/blazer.rb', line 216

def self.slack?
  slack_oauth_token.present? || slack_webhook_url.present?
end

.uploads? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/blazer.rb', line 225

def self.uploads?
  settings.key?("uploads")
end

.uploads_connection ⇒ Object 



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# File 'lib/blazer.rb', line 229

def self.uploads_connection
  raise "Empty url for uploads" unless settings.dig("uploads", "url")
  Blazer::UploadsConnection.connection
end

.uploads_schema ⇒ Object 



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# File 'lib/blazer.rb', line 234

def self.uploads_schema
  settings.dig("uploads", "schema") || "uploads"
end

.uploads_table_name(name) ⇒ Object 



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# File 'lib/blazer.rb', line 238

def self.uploads_table_name(name)
  uploads_connection.quote_table_name("#{uploads_schema}.#{name}")
end