Class: Optimizely::Project

Inherits:
Object
  • Object
show all
Defined in:
lib/optimizely.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(datafile, event_dispatcher = nil, logger = nil, error_handler = nil, skip_json_validation = false, user_profile_service = nil) ⇒ Project

Returns a new instance of Project.



40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
 
# File 'lib/optimizely.rb', line 40

def initialize(datafile, event_dispatcher = nil, logger = nil, error_handler = nil, skip_json_validation = false,  = nil)
  # Constructor for Projects.
  #
  # datafile - JSON string representing the project.
  # event_dispatcher - Provides a dispatch_event method which if given a URL and params sends a request to it.
  # logger - Optional component which provides a log method to log messages. By default nothing would be logged.
  # error_handler - Optional component which provides a handle_error method to handle exceptions.
  #                 By default all exceptions will be suppressed.
  # user_profile_service - Optional component which provides methods to store and retreive user profiles.
  # skip_json_validation - Optional boolean param to skip JSON schema validation of the provided datafile.

  @is_valid = true
  @logger = logger || NoOpLogger.new
  @error_handler = error_handler || NoOpErrorHandler.new
  @event_dispatcher = event_dispatcher || EventDispatcher.new
  @user_profile_service = 

  begin
    validate_instantiation_options(datafile, skip_json_validation)
  rescue InvalidInputError => e
    @is_valid = false
    logger = SimpleLogger.new
    logger.log(Logger::ERROR, e.message)
    return
  end

  begin
    @config = ProjectConfig.new(datafile, @logger, @error_handler)
  rescue
    @is_valid = false
    logger = SimpleLogger.new
    logger.log(Logger::ERROR, InvalidInputError.new('datafile').message)
    return
  end

  unless @config.parsing_succeeded?
    @is_valid = false
    logger = SimpleLogger.new
    logger.log(Logger::ERROR, InvalidDatafileVersionError.new.message)
    return
  end

  @decision_service = DecisionService.new(@config, @user_profile_service)
  @event_builder = EventBuilderV2.new(@config)
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



33
34
35
 
# File 'lib/optimizely.rb', line 33

def config
  @config
end

#decision_service ⇒ Object (readonly)

Returns the value of attribute decision_service.



34
35
36
 
# File 'lib/optimizely.rb', line 34

def decision_service
  @decision_service
end

#error_handler ⇒ Object (readonly)

Returns the value of attribute error_handler.



35
36
37
 
# File 'lib/optimizely.rb', line 35

def error_handler
  @error_handler
end

#event_builder ⇒ Object (readonly)

Returns the value of attribute event_builder.



36
37
38
 
# File 'lib/optimizely.rb', line 36

def event_builder
  @event_builder
end

#event_dispatcher ⇒ Object (readonly)

Returns the value of attribute event_dispatcher.



37
38
39
 
# File 'lib/optimizely.rb', line 37

def event_dispatcher
  @event_dispatcher
end

#is_valid ⇒ Object (readonly)

Boolean representing if the instance represents a usable Optimizely Project



31
32
33
 
# File 'lib/optimizely.rb', line 31

def is_valid
  @is_valid
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



38
39
40
 
# File 'lib/optimizely.rb', line 38

def logger
  @logger
end

Instance Method Details

#activate(experiment_key, user_id, attributes = nil) ⇒ Object 



86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
 
# File 'lib/optimizely.rb', line 86

def activate(experiment_key, user_id, attributes = nil)
  # Buckets visitor and sends impression event to Optimizely.
  #
  # experiment_key - Experiment which needs to be activated.
  # user_id - String ID for user.
  # attributes - Hash representing user attributes and values to be recorded.
  #
  # Returns variation key representing the variation the user will be bucketed in.
  # Returns nil if experiment is not Running, if user is not in experiment, or if datafile is invalid.

  unless @is_valid
    logger = SimpleLogger.new
    logger.log(Logger::ERROR, InvalidDatafileError.new('activate').message)
    return nil
  end

  variation_key = get_variation(experiment_key, user_id, attributes)

  if variation_key.nil?
    @logger.log(Logger::INFO, "Not activating user '#{user_id}'.")
    return nil
  end

  # Create and dispatch impression event
  variation_id = @config.get_variation_id_from_key(experiment_key, variation_key)
  impression_event = @event_builder.create_impression_event(experiment_key, variation_id, user_id, attributes)
  @logger.log(Logger::INFO,
              'Dispatching impression event to URL %s with params %s.' % [impression_event.url,
                                                                          impression_event.params])
  begin
    @event_dispatcher.dispatch_event(impression_event)
  rescue => e
    @logger.log(Logger::ERROR, "Unable to dispatch impression event. Error: #{e}")
  end

  variation_key
end

#get_variation(experiment_key, user_id, attributes = nil) ⇒ Object 



124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
 
# File 'lib/optimizely.rb', line 124

def get_variation(experiment_key, user_id, attributes = nil)
  # Gets variation where visitor will be bucketed.
  #
  # experiment_key - Experiment for which visitor variation needs to be determined.
  # user_id - String ID for user.
  # attributes - Hash representing user attributes.
  #
  # Returns variation key where visitor will be bucketed.
  # Returns nil if experiment is not Running, if user is not in experiment, or if datafile is invalid.

  unless @is_valid
    logger = SimpleLogger.new
    logger.log(Logger::ERROR, InvalidDatafileError.new('get_variation').message)
    return nil
  end

  unless user_inputs_valid?(attributes)
    @logger.log(Logger::INFO, "Not activating user '#{user_id}.")
    return nil
  end

  variation_id = @decision_service.get_variation(experiment_key, user_id, attributes)

  unless variation_id.nil?
    return @config.get_variation_key_from_id(experiment_key, variation_id)
  end
  nil
end

#track(event_key, user_id, attributes = nil, event_tags = nil) ⇒ Object 



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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
 
# File 'lib/optimizely.rb', line 153

def track(event_key, user_id, attributes = nil, event_tags = nil)
  # Send conversion event to Optimizely.
  #
  # event_key - Event key representing the event which needs to be recorded.
  # user_id - String ID for user.
  # attributes - Hash representing visitor attributes and values which need to be recorded.
  # event_tags - Hash representing metadata associated with the event.

  unless @is_valid
    logger = SimpleLogger.new
    logger.log(Logger::ERROR, InvalidDatafileError.new('track').message)
    return nil
  end

  if event_tags and event_tags.is_a? Numeric
    event_tags = {
      'revenue' => event_tags
    }
    @logger.log(Logger::WARN, 'Event value is deprecated in track call. Use event tags to pass in revenue value instead.')
  end

  return nil unless user_inputs_valid?(attributes, event_tags)

  experiment_ids = @config.get_experiment_ids_for_event(event_key)
  if experiment_ids.empty?
    @config.logger.log(Logger::INFO, "Not tracking user '#{user_id}'.")
    return nil
  end

  # Filter out experiments that are not running or that do not include the user in audience conditions

  experiment_variation_map = get_valid_experiments_for_event(event_key, user_id, attributes)

  # Don't track events without valid experiments attached
  if experiment_variation_map.empty?
    @logger.log(Logger::INFO, "There are no valid experiments for event '#{event_key}' to track.")
    return nil
  end

  conversion_event = @event_builder.create_conversion_event(event_key, user_id, attributes,
                                                            event_tags, experiment_variation_map)
  @logger.log(Logger::INFO,
              'Dispatching conversion event to URL %s with params %s.' % [conversion_event.url,
                                                                          conversion_event.params])
  begin
    @event_dispatcher.dispatch_event(conversion_event)
  rescue => e
    @logger.log(Logger::ERROR, "Unable to dispatch conversion event. Error: #{e}")
  end
end