Class: Shugoi::ConfigCache

Inherits:
Object
  • Object
show all
Defined in:
lib/shugoi/config_cache.rb

Constant Summary collapse

TTL_MS = 
30_000
STALE_MAX_MS = 
600_000

Instance Method Summary collapse

Constructor Details

#initialize(api_client, signing_secret = nil) ⇒ ConfigCache

Returns a new instance of ConfigCache.



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# File 'lib/shugoi/config_cache.rb', line 6

def initialize(api_client, signing_secret = nil)
  @api_client = api_client
  @signing_secret = signing_secret
  @mutex = Mutex.new
  @whitelist = []
  @flags = {}
  @skip_paths = []
  @fetched_at = 0
  @refreshing = false
end

Instance Method Details

#fetch(site_key) ⇒ Object 



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# File 'lib/shugoi/config_cache.rb', line 17

def fetch(site_key)
  now = Utils.now_ms
  refresh_now = false
  refresh_async = false

  @mutex.synchronize do
    age = now - @fetched_at
    refresh_now = @fetched_at.zero? || age > STALE_MAX_MS
    refresh_async = !refresh_now && age > TTL_MS && !@refreshing
    @refreshing = true if refresh_now || refresh_async
  end

  if refresh_now
    refresh(site_key)
  elsif refresh_async
    Thread.new { refresh(site_key) }.abort_on_exception = false
  end

  @mutex.synchronize do
    { whitelist: @whitelist.dup, flags: @flags.dup, skip_paths: @skip_paths.dup }
  end
end