# 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/ckefcia
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高併發下如何保證單例模式的線程安全**
單例模式是常用的軟件設計模式之一，同時也是設計模式中最簡單的形式之一，在單例模式中對象只有一個實例存在。單例模式的實現方式有兩種，分別是懶漢式和餓漢式。1、餓漢式   餓漢式在類加載時已經創建好實例對象，在程序調用時直接返回該單例對象即可，即在編碼時就已經指明瞭要馬上創建這個對象，不需要等到被調用時再去創建，如下是餓漢式的代碼：public class Singleton { privat ⌘ Read more