Class: Elasticity::AwsSession

Inherits:
Object
  • Object
show all
Defined in:
lib/elasticity/aws_session.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(access = nil, secret = nil, options = {}) ⇒ AwsSession

Supported values for options:

:region - AWS region (e.g. us-west-1)
:secure - true or false, default true.



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# File 'lib/elasticity/aws_session.rb', line 18

def initialize(access=nil, secret=nil, options={})
  # There is a cryptic error if this isn't set
  if options.has_key?(:region) && options[:region] == nil
    raise MissingRegionError, 'A valid :region is required to connect to EMR'
  end
  options[:region] = 'us-east-1' unless options[:region]
  @region = options[:region]

  @access_key = get_access_key(access)
  @secret_key = get_secret_key(secret)
  @host = "elasticmapreduce.#@region.amazonaws.com"
end

Instance Attribute Details

#access_key ⇒ Object (readonly)

Returns the value of attribute access_key.



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# File 'lib/elasticity/aws_session.rb', line 10

def access_key
  @access_key
end

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/elasticity/aws_session.rb', line 12

def host
  @host
end

#region ⇒ Object (readonly)

Returns the value of attribute region.



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# File 'lib/elasticity/aws_session.rb', line 13

def region
  @region
end

#secret_key ⇒ Object (readonly)

Returns the value of attribute secret_key.



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# File 'lib/elasticity/aws_session.rb', line 11

def secret_key
  @secret_key
end

Class Method Details

.parse_error_response(error_xml) ⇒ Object

AWS error responses all follow the same form. Extract the message from the error document.



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# File 'lib/elasticity/aws_session.rb', line 64

def self.parse_error_response(error_xml)
  xml_doc = Nokogiri::XML(error_xml)
  xml_doc.remove_namespaces!
  xml_doc.xpath('/ErrorResponse/Error/Message').text
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/elasticity/aws_session.rb', line 40

def ==(other)
  return false unless other.is_a? AwsSession
  return false unless @access_key == other.access_key
  return false unless @secret_key == other.secret_key
  return false unless @host == other.host
  true
end

#submit(ruby_service_hash) ⇒ Object 



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# File 'lib/elasticity/aws_session.rb', line 31

def submit(ruby_service_hash)
  aws_request = AwsRequestV4.new(self, ruby_service_hash)
  begin
    RestClient.post(aws_request.url, aws_request.payload, aws_request.headers)
  rescue RestClient::BadRequest => e
    raise ArgumentError, AwsSession.parse_error_response(e.http_body)
  end
end