Class: Es::Extract

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(entities, options = {}) ⇒ Extract

Returns a new instance of Extract.



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# File 'lib/es.rb', line 240

def initialize(entities, options = {})
  @entities = entities
  @timeframe = options[:timeframe]
  @timezone = options[:timezone] || 'UTC'
end

Instance Attribute Details

#entities ⇒ Object

Returns the value of attribute entities.



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

def entities
  @entities
end

#partial ⇒ Object

Returns the value of attribute partial.



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

def partial
  @partial
end

#timeframe ⇒ Object

Returns the value of attribute timeframe.



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

def timeframe
  @timeframe
end

#timezone ⇒ Object

Returns the value of attribute timezone.



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

def timezone
  @timezone
end

Class Method Details

.parse(spec, a_load, options = {}) ⇒ Object 



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# File 'lib/es.rb', line 108

def self.parse(spec, a_load, options={})
  global_timeframe = parse_timeframes(spec[:timeframes], options) || parse_timeframes("latest", options)
  timezone = spec[:timezone]
  parsed_entities = spec[:entities].map do |entity_spec|
    entity_name = entity_spec[:entity]
    partial = entity_spec[:partial] || "false"
    load_entity = a_load.get_merged_entity_for(entity_name)
    fields = entity_spec[:fields].map do |field|
      if load_entity.has_field?(field)
        if (load_entity.get_field(field).is_recordid?)
          Es::RecordIdField.new(load_entity.get_field(field).name, load_entity.get_field(field).type, partial)
        else
          load_entity.get_field(field)
        end
      elsif field == "DeletedAt"
        Es::Field.new("DeletedAt", "time")
      elsif field == "IsDeleted"
        Es::Field.new("IsDeleted", "attribute")
      elsif field == "snapshot"
        Es::SnapshotField.new("snapshot", "snapshot")
      elsif field == "autoincrement"
        Es::AutoincrementField.new("generate", "autoincrement")
      elsif field == "duration" || (field.respond_to?(:keys) && field.keys.first == :duration )
        if (field == "duration") then
          Es::DurationField.new("duration", "duration")
        else 
          Es::DurationField.new("duration", "duration",{
              :attribute =>         field[:duration][:attribute],
              :value =>             field[:duration][:value],
              :control_attribute => field[:duration][:name]
            })
        end
      elsif field == "velocity" || (field.respond_to?(:keys) && field.keys.first == :velocity )
        if (field == "velocity") then
          Es::VelocityField.new("velocity", "velocity")
        else
          Es::VelocityField.new("velocity", "velocity",{
              :control_attribute => field[:velocity][:name]
            })
        end
      elsif field.respond_to?(:keys) && field.keys.first == :hid
        Es::HIDField.new('hid', "historicid", {
          :entity => field[:hid][:from_entity],
          :fields => field[:hid][:from_fields],
          :through => field[:hid][:connected_through]
        })
      else
        fail InsufficientSpecificationError.new("The field #{field.to_s.bright} was not found in either the loading specification nor was recognized as a special column")
      end
    end
    parsed_timeframe = parse_timeframes(entity_spec[:timeframes], options)
    Entity.new(entity_name, {
      :fields => fields,
      :file   => Pathname.new(entity_spec[:file]).expand_path.to_s,
      :timeframe => parsed_timeframe || global_timeframe || (fail "Timeframe has to be defined"),
      :timezone => timezone
    })
  end

  Extract.new(parsed_entities)
end

.parse_timeframes(timeframe_spec, options = {}) ⇒ Object 



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# File 'lib/es.rb', line 220

def self.parse_timeframes(timeframe_spec, options={})
  return nil if timeframe_spec.nil?
  if timeframe_spec.is_a?(Array) then
    timeframe_spec.map {|t_spec| Es::Timeframe.parse(t_spec, options)}
  else
    Es::Timeframe.parse(timeframe_spec, options)
  end
end

.parseOldFormat(spec, a_load) ⇒ Object 



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# File 'lib/es.rb', line 171

def self.parseOldFormat(spec,a_load)
  global_timeframe = parseOldFormat_timeframes(spec[:timeFrames])
  timezone = spec[:timezone]
  entity_name = spec[:entity]
  load_entity = a_load.get_merged_entity_for(entity_name)
  parser = Yajl::Parser.new(:symbolize_keys => true)
  i=0
  begin
      doc = parser.parse(spec[:readMap])
      doc.map do |internal|
        fields = internal[:columns].map do |definition|
          if load_entity.has_field?(definition[:name])
            load_entity.get_field(definition[:name])
          elsif definition[:name] == "DeletedAt"
            Es::Field.new("DeletedAt", "time")
          elsif definition[:name] == "IsDeleted"
            Es::Field.new("IsDeleted", "attribute")
          elsif definition[:name] == "snapshot" || definition[:definition][:type] == "snapshot"
            Es::SnapshotField.new("snapshot", "snapshot")
          elsif definition[:name] == "autoincrement"
            Es::AutoincrementField.new("generate", "autoincrement")
          elsif definition[:name] == "duration"
            Es::DurationField.new("duration", "duration")
          elsif definition[:name] == "velocity"
            Es::DurationField.new("velocity", "velocity")
          elsif definition[:definition][:type] == "historicid"
            Es::HIDField.new('hid', "historicid",Es::Helpers.get_historyid_settings(definition[:definition][:ops]))
          elsif definition[:name].downcase == "iswon" || definition[:name].downcase == "isclosed" || definition[:name].downcase == "stagename" || definition[:name].downcase == "daytoclose" || definition[:name] == "dayssincelastactivity"
            Es::Field.new(definition[:name], "attribute")  
          else
            puts "WARNING! Transformer has found out field #{definition[:name]} which is not in load script, puting to extract as attribute"
            Es::Field.new("#{definition[:name]}", "attribute") 
          end     
        end
        parsed_timeframe = parseOldFormat_timeframes(internal[:timeframes])
        entity = Entity.new(entity_name, {
                                          :fields => fields,
                                          :file   => internal[:file],
                                          :timeframe => parsed_timeframe || global_timeframe || (fail "Timeframe has to be defined"),
                                          :timezone => timezone
                                         })
        entity
      end
  rescue Yajl::ParseError => e
    fail Yajl::ParseError.new("Failed during parsing internal JSON. Error message: " + e.message)
    end
end

.parseOldFormat_timeframes(timeframe_spec) ⇒ Object 



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

def self.parseOldFormat_timeframes(timeframe_spec)
  return nil if timeframe_spec.nil?
  return Timeframe.parse("latest") if timeframe_spec == "latest"
  if timeframe_spec.is_a?(Array) then
    timeframe_spec.map {|t_spec|  Es::Timeframe.parseOldFormat(t_spec)}
  else
    Es::Timeframe.parseOldFormat(timeframe_spec)
  end
end

Instance Method Details

#get_entity(name) ⇒ Object 



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

def get_entity(name)
  entities.detect {|e| e.name == name}
end

#to_extract_fragment(pid, options = {}) ⇒ Object 



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

def to_extract_fragment(pid, options = {})
  entities.map do |entity|
    entity.to_extract_fragment(pid, options)
  end
end