Class: Coupler::Models::Scenario::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/coupler/models/scenario/runner.rb

Constant Summary collapse

LIMIT = 
10000

Instance Method Summary collapse

Constructor Details

#initialize(parent, &progress) ⇒ Runner 



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# File 'lib/coupler/models/scenario/runner.rb', line 7

def initialize(parent, &progress)
  @parent = parent
  @progress = progress
  @matcher = parent.matcher
  @type = parent.linkage_type
  if @type == 'cross-linkage'
    @resources = [parent.resource_1, parent.resource_1]
  else
    @resources = parent.resources
  end
  @run_number = @parent.run_count + 1
  @mutex = Mutex.new
  @group_number = 0
  setup_pairs
  create_tables
end

Instance Method Details

#run! ⇒ Object 



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# File 'lib/coupler/models/scenario/runner.rb', line 24

def run!
  @parent.local_database do |scenario_db|
    @groups_dataset = scenario_db[@groups_table_name]
    @groups_buffer = ImportBuffer.new(@groups_column_names, @groups_dataset)
    @join_dataset = scenario_db[@join_table_name]
    @join_buffer = ImportBuffer.new([:record_id, :which, :group_id], @join_dataset)

    # Group records for each dataset.  This step is the same for both
    # self-linkage and dual-linkage.  However, this is the only step
    # for self-linkage.  Dual-linkage requires another pass after
    # this.
    #
    # Cross-matching on a single dataset is treated as a dual-linkage.
    #
    @pairs = @phase_one_pairs
    tw = ThreadsWait.new
    databases_to_close = []
    @resources.each_with_index do |resource, i|
      dataset = resource.final_dataset
      databases_to_close << dataset.db
      primary_key = resource.primary_key_sym
      which = @type == 'self-linkage' ? nil : i
      resource_thread = phase_one_thread(dataset, primary_key, which)
      tw.join_nowait(resource_thread)
    end
    tw.all_waits
    databases_to_close.each do |db|   # tidy up
      db.disconnect
      ::Sequel::DATABASES.delete(db)
    end

    if @type != 'self-linkage'
      # Phase 2!
      secondary_groups_ds = scenario_db[@secondary_groups_table_name].order(:group_1_id, :group_2_id)
      @join_buffer = ImportBuffer.new([:group_1_id, :group_2_id], secondary_groups_ds)
      @pairs = @phase_two_pairs
      phase_two(@groups_dataset, :id)
      @join_buffer.flush

      # Update groups and groups_records
      tw = ThreadsWait.new
      count = secondary_groups_ds.count
      offset = 0
      last_group_id = @group_number
      while offset < count
        dataset = secondary_groups_ds.limit(10, offset)
        offset += 10
        dataset.each do |row|
          thread = Thread.new(row[:group_1_id], row[:group_2_id]) do |group_1_id, group_2_id|
            new_group_id = get_next_group_id
            @join_dataset.filter(:group_id => [group_1_id, group_2_id]).update(:group_id => new_group_id)
            @groups_dataset.filter(:id => group_1_id).update(:id => new_group_id)
            @groups_dataset.filter(:id => group_2_id).delete
          end
          thread.abort_on_exception = true
          tw.join_nowait(thread)
        end
        tw.all_waits
      end

      # Clean up groups and records that don't match
      @groups_dataset.filter(:id <= last_group_id).delete
      @join_dataset.filter(:group_id <= last_group_id).delete

      # Don't need the secondary table anymore
      scenario_db.drop_table(@secondary_groups_table_name)
    end

    # Calculate some summary stats
    @join_dataset.group_and_count(:group_id, :which).each do |row|
      col = row[:which] ? :"resource_#{row[:which]+1}_count" : :"resource_1_count"
      @groups_dataset.filter(:id => row[:group_id]).update(col => row[:count])
    end
  end
end