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Versions: 6
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Contents
description 'Caching support'
dependencies 'utils/worker', 'utils/store'
class Cache
def initialize(store)
@store = store
@disabled = false
end
def disable!
@disabled = true
end
# Block around cacheable return value identified by a <i>key</i>.
# The following options can be specified:
# * :disable Disable caching
# * :update Force cache update
# * :defer Deferred cache update
def cache(key, options = {}, &block)
return yield(self) if options[:disable] || !Config['production']
# Warning: don't change this. This must be thread safe!
if options[:update]
if options[:defer] && ((value = @store[key]) || @store.key?(key)) # Check key? because value could be nil
Worker.defer { update(key, options, &block) }
return value
end
else
return value if (value = @store[key]) || @store.key?(key) # Check key? because value could be nil
end
update(key, options, &block)
end
def clear
@store.clear
end
private
def update(key, options = {}, &block)
content = block.call(self)
@store[key] = content if !@disabled
content
end
class<< self
def store
@store ||= Store.create(Config['cache_store'])
end
def cache(*args, &block)
Cache.new(store).cache(*args, &block)
end
end
end
Olelo::Cache = Cache
Version data entries
6 entries across 6 versions & 1 rubygems