Class: FaaStRuby::RPC::Function

Inherits:
Object
  • Object
show all
Defined in:
lib/faastruby-rpc/function.rb

Constant Summary collapse

@@region = 
ENV['FAASTRUBY_REGION']
@@endpoint_base_host = 
ENV['FAASTRUBY_WORKSPACE_BASE_HOST']
@@endpoint_base_protocol = 
ENV['FAASTRUBY_URL_PROTOCOL'] || 'https'

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, raise_errors: true) ⇒ Function

Returns a new instance of Function.



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# File 'lib/faastruby-rpc/function.rb', line 24

def initialize(path, raise_errors: true)
  @response = nil
  @path = path
  @methods = {
    'post' => Net::HTTP::Post,
    'get' => Net::HTTP::Get,
    'put' => Net::HTTP::Put,
    'patch' => Net::HTTP::Patch,
    'delete' => Net::HTTP::Delete
  }
  @raise_errors = raise_errors
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *args, &block) ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 94

def method_missing(m, *args, &block)
  rsp = response.body
  rsp.send(m.to_sym, *args, &block)
end

Class Method Details

.workspace=(workspace) ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 21

def self.workspace=(workspace)
  @@workspace = workspace
end

Instance Method Details

#body ⇒ Object

alias_method :read, :to_s



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# File 'lib/faastruby-rpc/function.rb', line 114

def body
  # wait unless returned?
  response.body
end

#call(*args) ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 37

def call(*args)
  @thread = Thread.new do
    output = args.any? ? call_with(*args) : execute(method: 'get')
    @response.body = yield(output) if block_given?
  end
  self
end

#code ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 119

def code
  # wait unless returned?
  response.code
end

#execute(req_body: nil, query_params: {}, headers: {}, method: 'post') ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 50

def execute(req_body: nil, query_params: {}, headers: {}, method: 'post')
  url = get_endpoint(convert_query_params(query_params))
  uri = URI.parse(url)
  use_ssl = uri.scheme == 'https' ? true : false
  function_response = fetch(use_ssl: use_ssl, uri: uri, headers: headers, method: @methods[method], req_body: req_body)
  resp_headers = {}
  function_response.each{|k,v| resp_headers[k] = v}
  case resp_headers['content-type']
  when 'application/json'
    begin
      resp_body = Oj.load(function_response.body)
    rescue Oj::ParseError => e
      if function_response.body.is_a?(String)
        resp_body = function_response.body
      else
        raise e if @raise_errors
        resp_body = {
          'error' => e.message,
          'location' => e.backtrace&.first
        }
      end
    end
  when 'application/yaml'
    resp_body = YAML.load(function_response.body)
  else
    resp_body = function_response.body
  end
  if function_response.code.to_i >= 400 && @raise_errors
    location = resp_body['location'] ? " @ #{resp_body['location']}" : nil
    error_msg = "#{resp_body['error']}#{location}"
    raise FaaStRuby::RPC::ExecutionError.new("Function '#{@path}' returned status code #{function_response.code}: #{error_msg}")
  end
  @response = FaaStRuby::RPC::Response.new(resp_body, function_response.code.to_i, resp_headers)
  self
end

#get_endpoint(query_params) ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 45

def get_endpoint(query_params)
  return "#{@@endpoint_base_protocol}://#{@@workspace}.#{@@region}.#{@@endpoint_base_host}/#{@path}#{query_params}" if @@endpoint_base_host && @@region && @@workspace
  return "http://localhost:3000/#{@path}#{query_params}"
end

#headers ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 124

def headers
  # wait unless returned?
  response.headers
end

#inspect ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 108

def inspect
  body.inspect || ""
end

#klass ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 129

def klass
  # wait unless returned?
  response.klass
end

#response ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 99

def response
  wait unless returned?
  @response
end

#returned? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/faastruby-rpc/function.rb', line 86

def returned?
  !@response.nil?
end

#to_s ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 104

def to_s
  body.to_s || ""
end

#value ⇒ Object 



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# File 'lib/faastruby-rpc/function.rb', line 90

def value
  body
end