# 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/5iy64xa
冪等性:構建穩健分佈式系統的關鍵**
爲什麼冪等性是關鍵?在現代分佈式系統中,可用性是關鍵因素,這意味着你需要構建重試機制和處理失敗及恢復的方法。這也意味着你可能會在系統中重複處理相同的操作,但如果你的應用程序不瞭解這一點,並將其視爲一個全新的請求,它將產生不可預期的結果。如果是處理支付或管理電子商務訂單的應用程序,這會導致巨大的財務損失和不可挽回的損害。 那麼,我們該怎麼做才能保證多次執行操作的結果與僅執行一次的結果相同呢? 讓 ⌘ Read more