Class: Flagsmith::RealtimeClient

Inherits:
Object
  • Object
show all
Defined in:
lib/flagsmith/sdk/realtime_client.rb

Overview

Ruby client for realtime access to flagsmith.com

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ RealtimeClient

Returns a new instance of RealtimeClient.



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# File 'lib/flagsmith/sdk/realtime_client.rb', line 12

def initialize(config)
  @config = config
  @thread = nil
  @running = false
  @main = nil
end

Instance Attribute Details

#running ⇒ Object

Returns the value of attribute running.



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# File 'lib/flagsmith/sdk/realtime_client.rb', line 10

def running
  @running
end

Instance Method Details

#endpoint ⇒ Object 



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# File 'lib/flagsmith/sdk/realtime_client.rb', line 19

def endpoint
  "#{@config.realtime_api_url}sse/environments/#{@main.environment.api_key}/stream"
end

#listen(main, remaining_attempts: Float::INFINITY, retry_interval: 0.5) ⇒ Object

rubocop:disable Metrics/CyclomaticComplexity, Metrics/AbcSize, Metrics/MethodLength



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# File 'lib/flagsmith/sdk/realtime_client.rb', line 23

def listen(main, remaining_attempts: Float::INFINITY, retry_interval: 0.5) # rubocop:disable Metrics/CyclomaticComplexity, Metrics/AbcSize, Metrics/MethodLength
  last_updated_at = 0
  @main = main
  @running = true
  @thread = Thread.new do
    while @running && remaining_attempts.positive?
      remaining_attempts -= 1
      @config.logger.warn 'Beginning to pull down realtime endpoint'
      begin
        sleep retry_interval
        # Open connection to SSE endpoint
        Faraday.new(url: endpoint).get do |req|
          req.options.timeout = nil # Keep connection alive indefinitely
          req.options.open_timeout = 10
        end.body.each_line do |line| # rubocop:disable Style/MultilineBlockChain
          # SSE protocol: Skip non-event lines
          next if line.strip.empty? || line.start_with?(':')

          # Parse SSE fields
          next unless line.start_with?('data: ')

          data = JSON.parse(line[6..].strip)
          updated_at = data['updated_at']
          next unless updated_at > last_updated_at

          @config.logger.info "Realtime updating environment from #{last_updated_at} to #{updated_at}"
          @main.update_environment
          last_updated_at = updated_at
        end
      rescue Faraday::ConnectionFailed, Faraday::TimeoutError => e
        @config.logger.warn "Connection failed: #{e.message}. Retrying in #{retry_interval} seconds..."
      rescue StandardError => e
        @config.logger.error "Error: #{e.message}. Retrying in #{retry_interval} seconds..."
      end
    end
  end

  @running = false
end