大まかには前日のを http://d.hatena.ne.jp/yappo/20080508/1210246450 差分だけ書く。 Layer +-------------------------------+ | Application | +-------------------------------+ | ↑ Middleware ↓ | <- 無くても良い +-------------------------------+ | ↑ Innerware ↓ | | ↑ Before | After ↓ | <- 無くてもよい +-------------------------------+ | ↑ Innerware::Basic ↓ | <- 差し替え可能だし、無くても良い | ↑ Before | After ↓ | +----------------------------