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module Innate
class Cache
# Used by caches that serialize their contents to the filesystem.
# Right now we do not lock around write access to the file outside of the
# process, that means that all FileBased caches are not safe for use if you
# need more than one instance of your application.
module FileBased
attr_reader :filename
def cache_setup(*args)
@prefix = args.compact.join('-')
@dir = File.join(Dir.tmpdir, self.class::DIR)
FileUtils.mkdir_p(@dir)
@filename = File.join(@dir, @prefix + self.class::EXT)
@store = self.class::STORE.new(@filename)
end
def cache_clear
FileUtils.mkdir_p(@dir)
FileUtils.rm_f(@filename)
@store = self.class::STORE.new(@filename)
end
def cache_store(*args)
super{|key, value| transaction{|store| store[key] = value } }
end
def cache_fetch(*args)
super{|key| transaction{|store| store[key] } }
end
def cache_delete(*args)
super{|key| transaction{|store| store.delete(key) } }
end
def transaction(&block)
Innate.sync{ @store.transaction(&block) }
end
end
end
end
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