Class: RPCMapper::Cacheable::Store

Inherits:
Object
  • Object
show all
Defined in:
lib/rpc_mapper/cacheable/store.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(default_longevity) ⇒ Store

TRP: Specify the default longevity of a cache entry in seconds



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# File 'lib/rpc_mapper/cacheable/store.rb', line 9

def initialize(default_longevity)
  @store = {}
  @default_longevity = default_longevity
end

Instance Attribute Details

#default_longevity ⇒ Object

Returns the value of attribute default_longevity.



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# File 'lib/rpc_mapper/cacheable/store.rb', line 6

def default_longevity
  @default_longevity
end

#store ⇒ Object (readonly)

Returns the value of attribute store.



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# File 'lib/rpc_mapper/cacheable/store.rb', line 5

def store
  @store
end

Instance Method Details

#clear(key = nil) ⇒ Object 



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# File 'lib/rpc_mapper/cacheable/store.rb', line 14

def clear(key=nil)
  if key
    @store.delete(key)
  else
    @store.each do |key, entry|
      clear(key) if key && (!entry || entry.expired?)
    end
  end
end

#read(key) ⇒ Object

TRP: Returns value if a cache hit and the entry is not expired, nil otherwise



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# File 'lib/rpc_mapper/cacheable/store.rb', line 25

def read(key)
  if entry = @store[key]
    if entry.expired?
      clear(key)
      nil
    else
      entry.value
    end
  end
end

#write(key, value, expires = Time.now + default_longevity) ⇒ Object

TRP: Write a new cache value and optionally specify the expire time

this also will clear all expired items out of the store to keep memory consumption as low as possible



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# File 'lib/rpc_mapper/cacheable/store.rb', line 38

def write(key, value, expires=Time.now + default_longevity)
  clear
  @store[key] = Entry.new(value, expires)
end