Class: DynamoDB::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/ddbcli/ddb-client.rb

Constant Summary collapse

SERVICE_NAME = 
'dynamodb'
API_VERSION = 
'2012-08-10'
USER_AGENT = 
"ddbcli/#{DynamoDB::VERSION}"
DEFAULT_TIMEOUT = 
60

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(accessKeyId, secretAccessKey, endpoint_or_region) ⇒ Client

Returns a new instance of Client.



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# File 'lib/ddbcli/ddb-client.rb', line 28

def initialize(accessKeyId, secretAccessKey, endpoint_or_region)
  @accessKeyId = accessKeyId
  @secretAccessKey = secretAccessKey
  set_endpoint_and_region(endpoint_or_region)
  @timeout = DEFAULT_TIMEOUT
  @debug = false
  @retry_num = 3
  @retry_intvl = 10
end

Instance Attribute Details

#debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/ddbcli/ddb-client.rb', line 26

def debug
  @debug
end

#region ⇒ Object (readonly)

Returns the value of attribute region.



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# File 'lib/ddbcli/ddb-client.rb', line 22

def region
  @region
end

#retry_intvl ⇒ Object

Returns the value of attribute retry_intvl.



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# File 'lib/ddbcli/ddb-client.rb', line 25

def retry_intvl
  @retry_intvl
end

#retry_num ⇒ Object

Returns the value of attribute retry_num.



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# File 'lib/ddbcli/ddb-client.rb', line 24

def retry_num
  @retry_num
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/ddbcli/ddb-client.rb', line 23

def timeout
  @timeout
end

Instance Method Details

#query(action, hash) ⇒ Object 



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# File 'lib/ddbcli/ddb-client.rb', line 57

def query(action, hash)
  retry_query do
    query0(action, hash)
  end
end

#query0(action, hash) ⇒ Object 



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# File 'lib/ddbcli/ddb-client.rb', line 63

def query0(action, hash)
  if @debug
    $stderr.puts(<<EOS)
---request begin---
Action: #{action}
#{JSON.pretty_generate(hash)}
---request end---
EOS
  end

  req_body = JSON.dump(hash)
  date = Time.now.getutc

  headers = {
    'Content-Type'         => 'application/x-amz-json-1.0',
    'X-Amz-Target'         => "DynamoDB_#{API_VERSION.gsub('-', '')}.#{action}",
    'Content-Length'       => req_body.length.to_s,
    'User-Agent'           => USER_AGENT,
    'Host'                 => @endpoint.host,
    'X-Amz-Date'           => iso8601(date),
    'X-Amz-Content-Sha256' => hexhash(req_body),
    'Accept'               => '*/*',
    'Accept-Encoding'      => 'gzip',
  }

  headers['Authorization'] = authorization(date, headers, req_body)

  Net::HTTP.version_1_2
  http = Net::HTTP.new(@endpoint.host, @endpoint.port)

  if @endpoint.scheme == 'https'
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  end

  http.open_timeout = @timeout
  http.read_timeout = @timeout

  res_code = nil
  res_msg  = nil

  res_body = http.start do |w|
    req = Net::HTTP::Post.new('/', headers)
    req.body = req_body
    res = w.request(req)

    res_code = res.code.to_i
    res_msg  = res.message

    if res['Content-Encoding'] == 'gzip'
      StringIO.open(res.body, 'rb') do |f|
        Zlib::GzipReader.wrap(f).read
      end
    else
      res.body
    end
  end

  res_data = JSON.parse(res_body)

  if @debug
    $stderr.puts(<<EOS)
---response begin---
#{JSON.pretty_generate(res_data)}
---response end---
EOS
  end

  __type = res_data['__type']

  if res_code != 200 or __type
    errmsg = if __type
               if @debug
                 "#{__type}: #{res_data['message'] || res_data['Message']}"
               else
                 "#{res_data['message'] || res_data['Message']}"
               end
             else
               "#{res_code} #{res_msg}"
             end

    raise DynamoDB::Error.new(errmsg, res_data)
  end

  res_data
end

#set_endpoint_and_region(endpoint_or_region) ⇒ Object 



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# File 'lib/ddbcli/ddb-client.rb', line 38

def set_endpoint_and_region(endpoint_or_region)
  if endpoint_or_region.kind_of?(URI)
    @endpoint = endpoint_or_region

    aws_endpoint, region = DynamoDB::Endpoint::ENDPOINTS.find do |k, v|
      @endpoint.host[k]
    end

    if region
      @region = region
    else
      @region = [@endpoint.host, @endpoint.port].join(':')
    end
  else
    host, @region = DynamoDB::Endpoint.endpoint_and_region(endpoint_or_region)
    @endpoint = URI.parse("https://#{host}")
  end
end