Class: Redis::Stream::DataCache

Inherits:
Object
  • Object
show all
Defined in:
lib/redis/stream/data_cache.rb

Instance Method Summary collapse

Constructor Details

#initialize(logger = Logger.new(STDOUT)) ⇒ DataCache

Returns a new instance of DataCache.



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# File 'lib/redis/stream/data_cache.rb', line 8

def initialize(logger = Logger.new(STDOUT))
  @logger = logger
  @cache = Moneta.new(:HashFile, dir: Redis::Stream::Config[:data_cache] || "/tmp/cache", serializer: :json)
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/redis/stream/data_cache.rb', line 18

def [](key)
  @cache.fetch(key)
end

#[]=(key, value) ⇒ Object 



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# File 'lib/redis/stream/data_cache.rb', line 13

def []=(key, value)
  @logger.info("CACHE - #{File.basename(__FILE__)}:#{__LINE__} - caching with key #{key}")
  @cache.store(key, value)
end

#build_key(data) ⇒ Object 



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# File 'lib/redis/stream/data_cache.rb', line 42

def build_key(data)
  key = ""
  if data && data.include?('payload')
    payload_data = data['payload']
  else
    payload_data = data
  end

  if payload_data.include?("id")
    id = payload_data["id"].downcase
    key = "#{id}"
    key = "#{@key_prefix}_#{key}" unless @key_prefix.nil? || @key_prefix&.empty?
  end
  raise "Empty cache key" if key.nil? || key&.empty?
  key
end

#delete(key) ⇒ Object 



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# File 'lib/redis/stream/data_cache.rb', line 30

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

#include?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis/stream/data_cache.rb', line 22

def include?(key)
  key?(key)
end

#key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis/stream/data_cache.rb', line 26

def key?(key)
  @cache.key?(key)
end

#key_prefix ⇒ Object 



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# File 'lib/redis/stream/data_cache.rb', line 38

def key_prefix
  @key_prefix
end

#key_prefix=(prefix) ⇒ Object 



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# File 'lib/redis/stream/data_cache.rb', line 34

def key_prefix=(prefix)
  @key_prefix = prefix.downcase
end

#resolve_by_message(pid, payload, &block) ⇒ Object 



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# File 'lib/redis/stream/data_cache.rb', line 59

def resolve_by_message(pid, payload, &block)
  data = nil
  cache_key = build_key(payload)
  invalidate_cache(cache_key, payload)
  data = load_from_cache(cache_key)
  data = load_from_service(pid, cache_key, &block) if data.nil?

  data
end