Class: DockerSwarm::Connection

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

Constant Summary collapse

IDEMPOTENT_METHODS =

HTTP methods safe to retry automatically. POST/PATCH are excluded because replaying after a partial failure can create duplicate resources.

%i[get head put delete options].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(socket_path, logger) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/docker_swarm/connection.rb', line 11

def initialize(socket_path, logger)
  @socket_path = socket_path
  @logger = logger
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/docker_swarm/connection.rb', line 9

def logger
  @logger
end

#socket_path ⇒ Object (readonly)

Returns the value of attribute socket_path.



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# File 'lib/docker_swarm/connection.rb', line 9

def socket_path
  @socket_path
end

Instance Method Details

#request(options = {}) ⇒ Object 



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# File 'lib/docker_swarm/connection.rb', line 16

def request(options = {})
  start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)

  log_event("request_started",
            level: :debug,
            data: options.merge(path: options[:path]))

  method = options[:method].to_s.downcase.to_sym
  idempotent = IDEMPOTENT_METHODS.include?(method)

  request_options = {
    idempotent: idempotent,
    retry_errors: [ Excon::Error::Socket, Excon::Error::Timeout ],
    read_timeout: DockerSwarm.configuration.read_timeout.to_f,
    write_timeout: DockerSwarm.configuration.write_timeout.to_f,
    connect_timeout: DockerSwarm.configuration.connect_timeout.to_f,
    retries: idempotent ? DockerSwarm.configuration.max_retries.to_i : 0
  }.merge(options)

  response = client.request(request_options)

  log_event("request_success",
            data: options.merge(
              http_status: response.status,
              duration_s: calculate_duration(start_time)
            ))

  response.body
rescue => e
  # Excon suele envolver excepciones de middleware en Excon::Error::Socket.
  # Recuperamos la causa original si es una excepción de DockerSwarm.
  actual_error = e.cause.is_a?(::DockerSwarm::Error) ? e.cause : e

  log_event("request_failure",
            level: :error,
            data: options.merge(
              error: actual_error.class.name,
              message: actual_error.message,
              duration_s: calculate_duration(start_time)
            ))

  case actual_error
  when ::DockerSwarm::Error
    raise actual_error
  when Excon::Error::Socket
    raise ::DockerSwarm::Error::Communication, "Docker socket error: #{actual_error.message}"
  else
    raise actual_error
  end
end