Sha256: e23e9268280473061d665a5255330c9191b1fe309eb29eeeae476710ef6328f1
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Size: 1007 Bytes
Versions: 17
Compression:
Stored size: 1007 Bytes
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] || (@second_level_cache && @second_level_cache.get(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 = {}
@second_level_cache = second_level_cache
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
17 entries across 17 versions & 5 rubygems