Class: RailsQuery::Client

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

Overview

Internal client class responsible for cache interactions

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Client

Returns a new instance of Client.



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# File 'lib/rails_query/client.rb', line 6

def initialize(config)
  @cache         = config.cache_store
  @default_ttl   = config.default_ttl
  @default_stale = config.default_stale
  @executor      = config.executor
  @namespace     = config.namespace
  @logger        = config.logger
end

Instance Method Details

#fetch(key, ttl: @default_ttl, stale: @default_stale, provider: nil, &block) ⇒ Object 



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# File 'lib/rails_query/client.rb', line 15

def fetch(key, ttl: @default_ttl, stale: @default_stale, provider: nil, &block)
  namespaced = namespaced_key(key)
  entry = @cache.read(namespaced)

  if entry
    age = Time.now - entry[:fetched_at]
    async_refetch(namespaced, ttl, provider, &block) if stale && stale < age
    return entry[:data]
  end

  data = block.call
  write(namespaced, data, ttl, provider: provider)

  data
end

#invalidate(key) ⇒ Object 



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# File 'lib/rails_query/client.rb', line 60

def invalidate(key)
  @cache.delete(namespaced_key(key))
end

#invalidate_provider(provider) ⇒ Object 



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# File 'lib/rails_query/client.rb', line 48

def invalidate_provider(provider)
  index_key = index_key(provider)

  keys = @cache.read(index_key) || []

  keys.each do |digest|
    @cache.delete(namespaced_key(digest))
  end

  @cache.delete(index_key)
end

#store_index(provider, key) ⇒ Object 



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# File 'lib/rails_query/client.rb', line 37

def store_index(provider, key)
  return unless provider

  idx_key = index_key(provider)

  keys = @cache.read(idx_key) || []
  keys << key

  @cache.write(idx_key, keys.uniq)
end

#write(key, data, ttl, provider: nil) ⇒ Object 



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# File 'lib/rails_query/client.rb', line 31

def write(key, data, ttl, provider: nil)
  store_index(provider, key) if provider

  @cache.write(key, { data: data, fetched_at: Time.now }, expires_in: ttl)
end