Module: Blazer

Defined in:
lib/blazer.rb,
lib/blazer/engine.rb,
lib/blazer/result.rb,
lib/blazer/version.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,
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,
lib/blazer/adapters/mongodb_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/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, RunStatement, RunStatementJob, SlackNotifier, TimeoutNotSupported, Upload, UploadError, UploadsConnection, UploadsController

Constant Summary collapse

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 = 
"2.4.7"

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.anomaly_checks ⇒ Object

Returns the value of attribute anomaly_checks.



58
59
60
 
# File 'lib/blazer.rb', line 58

def anomaly_checks
  @anomaly_checks
end

.async ⇒ Object

Returns the value of attribute async.



60
61
62
 
# File 'lib/blazer.rb', line 60

def async
  @async
end

.audit ⇒ Object

Returns the value of attribute audit.



47
48
49
 
# File 'lib/blazer.rb', line 47

def audit
  @audit
end

.before_action ⇒ Object

Returns the value of attribute before_action.



52
53
54
 
# File 'lib/blazer.rb', line 52

def before_action
  @before_action
end

.cache ⇒ Object

Returns the value of attribute cache.



54
55
56
 
# File 'lib/blazer.rb', line 54

def cache
  @cache
end

.check_schedules ⇒ Object

Returns the value of attribute check_schedules.



57
58
59
 
# File 'lib/blazer.rb', line 57

def check_schedules
  @check_schedules
end

.forecasting ⇒ Object

Returns the value of attribute forecasting.



59
60
61
 
# File 'lib/blazer.rb', line 59

def forecasting
  @forecasting
end

.from_email ⇒ Object

Returns the value of attribute from_email.



53
54
55
 
# File 'lib/blazer.rb', line 53

def from_email
  @from_email
end

.images ⇒ Object

Returns the value of attribute images.



61
62
63
 
# File 'lib/blazer.rb', line 61

def images
  @images
end

.mapbox_access_token ⇒ Object

Returns the value of attribute mapbox_access_token.



66
67
68
 
# File 'lib/blazer.rb', line 66

def mapbox_access_token
  @mapbox_access_token
end

.override_csp ⇒ Object

Returns the value of attribute override_csp.



64
65
66
 
# File 'lib/blazer.rb', line 64

def override_csp
  @override_csp
end

.query_editable ⇒ Object

Returns the value of attribute query_editable.



63
64
65
 
# File 'lib/blazer.rb', line 63

def query_editable
  @query_editable
end

.query_viewable ⇒ Object

Returns the value of attribute query_viewable.



62
63
64
 
# File 'lib/blazer.rb', line 62

def query_viewable
  @query_viewable
end

.slack_webhook_url ⇒ Object

Returns the value of attribute slack_webhook_url.



65
66
67
 
# File 'lib/blazer.rb', line 65

def slack_webhook_url
  @slack_webhook_url
end

.time_zone ⇒ Object

Returns the value of attribute time_zone.



48
49
50
 
# File 'lib/blazer.rb', line 48

def time_zone
  @time_zone
end

.transform_statement ⇒ Object

Returns the value of attribute transform_statement.



55
56
57
 
# File 'lib/blazer.rb', line 55

def transform_statement
  @transform_statement
end

.transform_variable ⇒ Object

Returns the value of attribute transform_variable.



56
57
58
 
# File 'lib/blazer.rb', line 56

def transform_variable
  @transform_variable
end

.user_class ⇒ Object 



91
92
93
94
95
96
 
# File 'lib/blazer.rb', line 91

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 



98
99
100
101
102
103
104
105
106
 
# File 'lib/blazer.rb', line 98

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.



49
50
51
 
# File 'lib/blazer.rb', line 49

def user_name
  @user_name
end

Class Method Details

.adapters ⇒ Object 



235
236
237
 
# File 'lib/blazer.rb', line 235

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

.data_sources ⇒ Object 



119
120
121
122
123
124
125
126
127
 
# File 'lib/blazer.rb', line 119

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

.extract_vars(statement) ⇒ Object 



129
130
131
132
133
 
# File 'lib/blazer.rb', line 129

def self.extract_vars(statement)
  # strip commented out lines
  # and regex {1} or {1,2}
  statement.to_s.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) ⇒ Object 



239
240
241
 
# File 'lib/blazer.rb', line 239

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

.run_check(check) ⇒ Object 



144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
 
# File 'lib/blazer.rb', line 144

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) ⇒ Object 



135
136
137
138
139
140
141
142
 
# File 'lib/blazer.rb', line 135

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 



188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
 
# File 'lib/blazer.rb', line 188

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 



108
109
110
111
112
113
114
115
116
117
 
# File 'lib/blazer.rb', line 108

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? ⇒ Boolean

Returns:

  • (Boolean) 


214
215
216
 
# File 'lib/blazer.rb', line 214

def self.slack?
  slack_webhook_url.present?
end

.uploads? ⇒ Boolean

Returns:

  • (Boolean) 


218
219
220
 
# File 'lib/blazer.rb', line 218

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

.uploads_connection ⇒ Object 



222
223
224
225
 
# File 'lib/blazer.rb', line 222

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

.uploads_schema ⇒ Object 



227
228
229
 
# File 'lib/blazer.rb', line 227

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

.uploads_table_name(name) ⇒ Object 



231
232
233
 
# File 'lib/blazer.rb', line 231

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