Class: CacheFailover::Store

Inherits:
ActiveSupport::Cache::Store
  • Object
show all
Defined in:
lib/cache_failover/store.rb

Defined Under Namespace

Classes: BrotliCompressor

Constant Summary collapse

MARK_BR_COMPRESSED = 
"\x02".b
DEFAULT_OPTIONS = 
{
  timeout: 5,
  compress: true,
  cache_db: 'cache'
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cache_stores) ⇒ Store

Returns a new instance of Store.



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# File 'lib/cache_failover/store.rb', line 24

def initialize(cache_stores)
  _core_store = cache_stores.find do |cs|
    options(cs[:options])
    Logger.new("log/#{CONFIG[:RAILS_ENV]}.log").info("CacheFailover: caching_up?: #{cs[:store].class.name}")
    Logger.new("log/#{CONFIG[:RAILS_ENV]}.log").info("CacheFailover: caching_up?: #{options}")
    Logger.new("log/#{CONFIG[:RAILS_ENV]}.log").info("#{caching_up?(cs[:store], options)}")
    caching_up?(cs[:store], options)
  end
  @core_store = _core_store[:store]
end

Instance Attribute Details

#core_store ⇒ Object (readonly)

Returns the value of attribute core_store.



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# File 'lib/cache_failover/store.rb', line 22

def core_store
  @core_store
end

Class Method Details

.supports_cache_versioning? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cache_failover/store.rb', line 147

def self.supports_cache_versioning?
  true
end

Instance Method Details

#clear(init_options = {}) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 135

def clear(init_options = {})
  @core_store.clear(**init_options)
end

#decrement(name, amount = 1, **init_options) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 143

def decrement(name, amount = 1, **init_options)
  @core_store.decrement(expanded_cache_key(name), amount, **init_options)
end

#delete(name, init_options = {}) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 131

def delete(name, init_options = {})
  @core_store.delete(expanded_cache_key(name), init_options)
end

#exist?(name, init_options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cache_failover/store.rb', line 127

def exist?(name, init_options = {})
  @core_store.exist?(expanded_cache_key(name), init_options)
end

#fetch(name, init_options = nil, &block) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 40

def fetch(name, init_options = nil, &block)
  options(init_options)

  if !block_given? && options[:force]
    raise ArgumentError, "Missing block: Calling `Cache#fetch` with `force: true` requires a block."
  end

  get_value(
    @core_store.fetch(expanded_cache_key(name), options.merge(compress: false)) do
      if block_given?
        store_value(block.call, options)
      else
        nil
      end
    end,
    options
  )
end

#fetch_multi(*names) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 108

def fetch_multi(*names)
  options = names.extract_options!
  expanded_names = names.map { |name| expanded_cache_key(name) }
  options(options)

  reads = core_store.send(:read_multi_entries, expanded_names, **options)
  reads.map do |key, val|
    [key, store_value(val, options)]
  end.to_h

  writes = {}
  ordered = names.index_with do |name|
    reads.fetch(name) { writes[name] = yield(name) }
  end

  write_multi(writes)
  ordered
end

#increment(name, amount = 1, **init_options) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 139

def increment(name, amount = 1, **init_options)
  @core_store.increment(expanded_cache_key(name), amount, **init_options)
end

#options(init_options = {}) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 35

def options(init_options = {})
  return @init_options if defined?(@init_options) && init_options.blank?
  @init_options = init_options.reverse_merge(DEFAULT_OPTIONS)
end

#read(name, init_options = nil) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 71

def read(name, init_options = nil)
  options(init_options)

  payload = @core_store.read(
    expanded_cache_key(name),
    options
  )

  get_value(payload, options)
end

#read_multi(*names) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 98

def read_multi(*names)
  options = names.extract_options!
  names = names.map { |name| expanded_cache_key(name) }
  options(options)

  core_store.read_multi(*names, options).map do |key, val|
    [key, get_value(val, options)]
  end.to_h
end

#write(name, value, init_options = nil) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 59

def write(name, value, init_options = nil)
  options(init_options)

  payload = store_value(value, options)

  @core_store.write(
    expanded_cache_key(name),
    payload,
    options.merge(compress: false)
  )
end

#write_multi(hash, init_options = nil) ⇒ Object 



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# File 'lib/cache_failover/store.rb', line 82

def write_multi(hash, init_options = nil)
  options(init_options)

  new_hash = hash.map do |key, val|
    [
      expanded_cache_key(key),
      store_value(val, options),
    ]
  end

  @core_store.write_multi(
    new_hash,
    options.merge(compress: false)
  )
end