Class: Prefab::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/prefab/client.rb

Constant Summary collapse

MAX_SLEEP_SEC = 
10
BASE_SLEEP_SEC = 
0.5
NO_DEFAULT_PROVIDED = 
:no_default_provided

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = Prefab::Options.new) ⇒ Client

Returns a new instance of Client.



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# File 'lib/prefab/client.rb', line 10

def initialize(options = Prefab::Options.new)
  @options = options
  @shared_cache = @options.shared_cache
  @stats = @options.stats
  @namespace = @options.namespace
  @stubs = {}

  if @options.local_only?
    @project_id = 0
    log_internal Logger::INFO, "Prefab Running in Local Mode"
  else
    @api_key = @options.api_key
    raise Prefab::Errors::InvalidApiKeyError.new(@api_key) if @api_key.nil? || @api_key.empty? || api_key.count("-") != 3
    @project_id = @api_key.split("-")[0].to_i # unvalidated, but that's ok. APIs only listen to the actual passwd
    @interceptor = Prefab::AuthInterceptor.new(@api_key)
    @prefab_api_url = @options.prefab_api_url
    @prefab_grpc_url = @options.prefab_grpc_url
    log_internal Logger::INFO, "Prefab Connecting to: #{@prefab_api_url} and #{@prefab_grpc_url} Secure: #{http_secure?}"
    at_exit do
      channel.destroy
    end
  end
end

Instance Attribute Details

#api_key ⇒ Object (readonly)

Returns the value of attribute api_key.



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# File 'lib/prefab/client.rb', line 8

def api_key
  @api_key
end

#interceptor ⇒ Object (readonly)

Returns the value of attribute interceptor.



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# File 'lib/prefab/client.rb', line 8

def interceptor
  @interceptor
end

#namespace ⇒ Object (readonly)

Returns the value of attribute namespace.



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# File 'lib/prefab/client.rb', line 8

def namespace
  @namespace
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/prefab/client.rb', line 8

def options
  @options
end

#prefab_api_url ⇒ Object (readonly)

Returns the value of attribute prefab_api_url.



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# File 'lib/prefab/client.rb', line 8

def prefab_api_url
  @prefab_api_url
end

#project_id ⇒ Object (readonly)

Returns the value of attribute project_id.



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# File 'lib/prefab/client.rb', line 8

def project_id
  @project_id
end

#shared_cache ⇒ Object (readonly)

Returns the value of attribute shared_cache.



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# File 'lib/prefab/client.rb', line 8

def shared_cache
  @shared_cache
end

#stats ⇒ Object (readonly)

Returns the value of attribute stats.



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# File 'lib/prefab/client.rb', line 8

def stats
  @stats
end

Instance Method Details

#cache_key(post_fix) ⇒ Object 



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# File 'lib/prefab/client.rb', line 85

def cache_key(post_fix)
  "prefab:#{project_id}:#{post_fix}"
end

#channel ⇒ Object 



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# File 'lib/prefab/client.rb', line 34

def channel
  credentials = http_secure? ? creds : :this_channel_is_insecure
  @_channel ||= GRPC::Core::Channel.new(@prefab_grpc_url, nil, credentials)
end

#config_client(timeout: 5.0) ⇒ Object 



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# File 'lib/prefab/client.rb', line 39

def config_client(timeout: 5.0)
  @config_client ||= Prefab::ConfigClient.new(self, timeout)
end

#enabled?(feature_name, lookup_key = nil, attributes = {}) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prefab/client.rb', line 94

def enabled?(feature_name, lookup_key=nil, attributes={})
  feature_flag_client.feature_is_on_for?(feature_name, lookup_key, attributes: attributes)
end

#feature_flag_client ⇒ Object 



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# File 'lib/prefab/client.rb', line 47

def feature_flag_client
  @feature_flag_client ||= Prefab::FeatureFlagClient.new(self)
end

#get(key, default_or_lookup_key = NO_DEFAULT_PROVIDED, attributes = {}, ff_default = NO_DEFAULT_PROVIDED) ⇒ Object 



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# File 'lib/prefab/client.rb', line 98

def get(key, default_or_lookup_key=NO_DEFAULT_PROVIDED, attributes={}, ff_default=NO_DEFAULT_PROVIDED)
  result = config_client.get(key, default_or_lookup_key)

  if result.is_a?(Prefab::FeatureFlag)
    feature_flag_client.get(key, default_or_lookup_key, attributes, default: ff_default)
  else
    result
  end
end

#log ⇒ Object 



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# File 'lib/prefab/client.rb', line 51

def log
  @logger_client ||= Prefab::LoggerClient.new(@options.logdev, formatter: @options.log_formatter)
end

#log_internal(level, msg, path = "prefab") ⇒ Object 



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# File 'lib/prefab/client.rb', line 55

def log_internal(level, msg, path = "prefab")
  log.log_internal msg, path, nil, level
end

#ratelimit_client(timeout: 5.0) ⇒ Object 



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# File 'lib/prefab/client.rb', line 43

def ratelimit_client(timeout: 5.0)
  @ratelimit_client ||= Prefab::RateLimitClient.new(self, timeout)
end

#request(service, method, req_options: {}, params: {}) ⇒ Object 



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# File 'lib/prefab/client.rb', line 59

def request(service, method, req_options: {}, params: {})
  opts = { timeout: 10 }.merge(req_options)

  attempts = 0
  start_time = Time.now

  begin
    attempts += 1
    return stub_for(service, opts[:timeout]).send(method, *params)
  rescue => exception

    log_internal Logger::WARN, exception

    if Time.now - start_time > opts[:timeout]
      raise exception
    end
    sleep_seconds = [BASE_SLEEP_SEC * (2 ** (attempts - 1)), MAX_SLEEP_SEC].min
    sleep_seconds = sleep_seconds * (0.5 * (1 + rand()))
    sleep_seconds = [BASE_SLEEP_SEC, sleep_seconds].max
    log_internal Logger::INFO, "Sleep #{sleep_seconds} and Reset #{service} #{method}"
    sleep sleep_seconds
    reset!
    retry
  end
end

#reset! ⇒ Object 



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# File 'lib/prefab/client.rb', line 89

def reset!
  @stubs.clear
  @_channel = nil
end