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.



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/prefab/client.rb', line 17

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

  if @options.local_only?
    log_internal Logger::INFO, 'Prefab Running in Local Mode'
  else
    @api_key = @options.api_key
    raise Prefab::Errors::InvalidApiKeyError, @api_key if @api_key.nil? || @api_key.empty? || api_key.count('-') < 1

    @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.



13
14
15
 
# File 'lib/prefab/client.rb', line 13

def api_key
  @api_key
end

#interceptor ⇒ Object (readonly)

Returns the value of attribute interceptor.



12
13
14
 
# File 'lib/prefab/client.rb', line 12

def interceptor
  @interceptor
end

#namespace ⇒ Object (readonly)

Returns the value of attribute namespace.



11
12
13
 
# File 'lib/prefab/client.rb', line 11

def namespace
  @namespace
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



15
16
17
 
# File 'lib/prefab/client.rb', line 15

def options
  @options
end

#prefab_api_url ⇒ Object (readonly)

Returns the value of attribute prefab_api_url.



14
15
16
 
# File 'lib/prefab/client.rb', line 14

def prefab_api_url
  @prefab_api_url
end

#shared_cache ⇒ Object (readonly)

Returns the value of attribute shared_cache.



9
10
11
 
# File 'lib/prefab/client.rb', line 9

def shared_cache
  @shared_cache
end

#stats ⇒ Object (readonly)

Returns the value of attribute stats.



10
11
12
 
# File 'lib/prefab/client.rb', line 10

def stats
  @stats
end

Instance Method Details

#channel ⇒ Object 



41
42
43
44
 
# File 'lib/prefab/client.rb', line 41

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 



46
47
48
 
# File 'lib/prefab/client.rb', line 46

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

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

Returns:

  • (Boolean) 


96
97
98
 
# File 'lib/prefab/client.rb', line 96

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 



54
55
56
 
# File 'lib/prefab/client.rb', line 54

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

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



100
101
102
103
104
105
106
 
# File 'lib/prefab/client.rb', line 100

def get(key, default_or_lookup_key = NO_DEFAULT_PROVIDED, properties = {}, ff_default = nil)
  if is_ff?(key)
    feature_flag_client.get(key, default_or_lookup_key, properties, default: ff_default)
  else
    config_client.get(key, default_or_lookup_key, properties)
  end
end

#log ⇒ Object 



58
59
60
61
 
# File 'lib/prefab/client.rb', line 58

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

#log_internal(level, msg, path = nil) ⇒ Object 



63
64
65
 
# File 'lib/prefab/client.rb', line 63

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

#ratelimit_client(timeout: 5.0) ⇒ Object 



50
51
52
 
# File 'lib/prefab/client.rb', line 50

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

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



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
 
# File 'lib/prefab/client.rb', line 67

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

  attempts = 0
  start_time = Time.now

  begin
    attempts += 1
    stub_for(service, opts[:timeout]).send(method, *params)
  rescue StandardError => e
    log_internal Logger::WARN, e

    raise e if Time.now - start_time > opts[:timeout]

    sleep_seconds = [BASE_SLEEP_SEC * (2**(attempts - 1)), MAX_SLEEP_SEC].min
    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 



91
92
93
94
 
# File 'lib/prefab/client.rb', line 91

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