Class: SentimentInsights::Clients::Entities::AwsClient

Inherits:
Object
  • Object
show all
Defined in:
lib/sentiment_insights/clients/entities/aws_client.rb

Constant Summary collapse

MAX_BATCH_SIZE = 
25

Instance Method Summary collapse

Constructor Details

#initialize(region: 'us-east-1') ⇒ AwsClient

Returns a new instance of AwsClient.



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# File 'lib/sentiment_insights/clients/entities/aws_client.rb', line 10

def initialize(region: 'us-east-1')
  @client = Aws::Comprehend::Client.new(region: region)
  @logger = Logger.new($stdout)
end

Instance Method Details

#extract_batch(entries, question: nil, prompt: nil) ⇒ Object 



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# File 'lib/sentiment_insights/clients/entities/aws_client.rb', line 15

def extract_batch(entries, question: nil, prompt: nil)
  responses = []
  entity_map = Hash.new { |h, k| h[k] = [] }

  entries.each_slice(MAX_BATCH_SIZE).with_index do |batch, batch_idx|
    texts = batch.map { |e| e[:answer].to_s.strip[0...5000] }

    begin
      resp = @client.batch_detect_entities({
                                             text_list: texts,
                                             language_code: 'en'
                                           })

      resp.result_list.each_with_index do |res, idx|
        entry_index = (batch_idx * MAX_BATCH_SIZE) + idx
        entry = entries[entry_index]
        sentence = texts[idx]
        response_id = "r_#{entry_index + 1}"

        responses << {
          id: response_id,
          sentence: sentence,
          segment: entry[:segment] || {}
        }

        entities = res.entities.map do |e|
          {
            text: e.text.downcase.strip,
            type: e.type
          }
        end.uniq { |e| [e[:text], e[:type]] }

        entities.each do |ent|
          key = [ent[:text], ent[:type]]
          entity_map[key] << response_id
        end
      end

      resp.error_list.each do |error|
        @logger.warn "AWS entity error at index #{error.index}: #{error.error_code}"
      end

    rescue Aws::Comprehend::Errors::ServiceError => e
      @logger.error "AWS Comprehend error: #{e.message}"
      batch.each_with_index do |entry, i|
        entry_index = (batch_idx * MAX_BATCH_SIZE) + i
        responses << {
          id: "r_#{entry_index + 1}",
          sentence: entry[:answer],
          segment: entry[:segment] || {}
        }
      end
    end
  end

  entities = entity_map.map do |(text, type), ref_ids|
    {
      entity: text,
      type: type,
      mentions: ref_ids.uniq,
      summary: nil
    }
  end

  { entities: entities, responses: responses }
end