Class: Datadog::Transport::HTTP::Client

Inherits:
Object
  • Object
show all
Includes:
Statistics
Defined in:
lib/ddtrace/transport/http/client.rb

Overview

Routes, encodes, and sends tracer data to the trace agent via HTTP.

Defined Under Namespace

Classes: NoDowngradeAvailableError, UnknownApiVersionError

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Statistics

#stats, #update_stats_from_response!

Constructor Details

#initialize(apis, current_api_id) ⇒ Client

Returns a new instance of Client.



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# File 'lib/ddtrace/transport/http/client.rb', line 15

def initialize(apis, current_api_id)
  @apis = apis

  # Activate initial API
  change_api!(current_api_id)
end

Instance Attribute Details

#apis ⇒ Object (readonly)

Returns the value of attribute apis.



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# File 'lib/ddtrace/transport/http/client.rb', line 11

def apis
  @apis
end

#current_api_id ⇒ Object (readonly)

Returns the value of attribute current_api_id.



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# File 'lib/ddtrace/transport/http/client.rb', line 11

def current_api_id
  @current_api_id
end

Instance Method Details

#build_env(request) ⇒ Object 



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# File 'lib/ddtrace/transport/http/client.rb', line 56

def build_env(request)
  Env.new(request)
end

#change_api!(api_id) ⇒ Object

Raises:



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# File 'lib/ddtrace/transport/http/client.rb', line 69

def change_api!(api_id)
  raise UnknownApiVersionError, api_id unless apis.key?(api_id)
  @current_api_id = api_id
end

#current_api ⇒ Object 



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# File 'lib/ddtrace/transport/http/client.rb', line 65

def current_api
  apis[current_api_id]
end

#downgrade! ⇒ Object

Raises:



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# File 'lib/ddtrace/transport/http/client.rb', line 74

def downgrade!
  downgrade_api_id = apis.fallbacks[current_api_id]
  raise NoDowngradeAvailableError, current_api_id if downgrade_api_id.nil?
  change_api!(downgrade_api_id)
end

#downgrade?(response) ⇒ Boolean

Returns:



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# File 'lib/ddtrace/transport/http/client.rb', line 60

def downgrade?(response)
  return false unless apis.fallbacks.key?(current_api_id)
  response.not_found? || response.unsupported?
end

#send_request(request, &block) ⇒ Object 



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# File 'lib/ddtrace/transport/http/client.rb', line 22

def send_request(request, &block)
  # Build request into env
  env = build_env(request)

  # Get response from API
  response = yield(current_api, env)

  # Update statistics
  update_stats_from_response!(response)

  # If API should be downgraded, downgrade and try again.
  if downgrade?(response)
    downgrade!
    response = send_request(request, &block)
  end

  response
rescue StandardError => e
  message = "Internal error during HTTP transport request. Cause: #{e.message} Location: #{e.backtrace.first}"

  # Log error
  if stats.consecutive_errors > 0
    Datadog::Tracer.log.debug(message)
  else
    Datadog::Tracer.log.error(message)
  end

  # Update statistics
  stats.internal_error += 1
  stats.consecutive_errors += 1

  InternalErrorResponse.new(e)
end