# I am the Watcher. I am your guide through this vast new twtiverse.
# 
# Usage:
#     https://watcher.sour.is/api/plain/users              View list of users and latest twt date.
#     https://watcher.sour.is/api/plain/twt                View all twts.
#     https://watcher.sour.is/api/plain/mentions?uri=:uri  View all mentions for uri.
#     https://watcher.sour.is/api/plain/conv/:hash         View all twts for a conversation subject.
# 
# Options:
#     uri     Filter to show a specific users twts.
#     offset  Start index for quey.
#     limit   Count of items to return (going back in time).
# 
# twt range = 1 1
# self = https://watcher.sour.is/conv/bx67yjq
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DDD 分層架構：有效降低層與層之間的依賴**
什麼是 DDD 分層架構？DDD（領域驅動設計）的分層架構經歷了持續的演進。最初是經典的四層架構；隨後，四層架構得到了進一步優化，實現了各層與基礎設施層的解耦；再到後來，在領域層和應用層之間引入了上下文環境（Context）層，從而形成了五層架構（DCI，Data-Context-Interaction）讓我們來看一下這張圖。在最早的傳統四層架構中，基礎層（Infrastructure Layer ⌘ Read more