Sha256: 197c99778652875d26b7296f12dece852a13518e9c29a347784a7196603809a9
Contents?: true
Size: 1.02 KB
Versions: 6
Compression:
Stored size: 1.02 KB
Contents
module DataMapper
# Tracks objects to help ensure that each object gets loaded only once.
# See: http://www.martinfowler.com/eaaCatalog/identityMap.html
class IdentityMap
# Get a resource from the IdentityMap
def get(key)
@cache[key]
end
alias [] get
# Add a resource to the IdentityMap
def set(key, resource)
@second_level_cache.set(key, resource) if @second_level_cache
@cache[key] = resource
end
alias []= set
# Remove a resource from the IdentityMap
def delete(key)
@second_level_cache.delete(key) if @second_level_cache
@cache.delete(key)
end
private
def initialize(second_level_cache = nil)
@cache = if @second_level_cache = second_level_cache
Hash.new { |h,key| h[key] = @second_level_cache.get(key) }
else
Hash.new
end
end
def cache
@cache
end
def method_missing(method, *args, &block)
cache.__send__(method, *args, &block)
end
end # class IdentityMap
end # module DataMapper
Version data entries
6 entries across 6 versions & 3 rubygems