Simplify DefaultScopedContextProvider
#2450
Closed
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This PR simplifies the logic of
DefaultScopedContextProvider
, by using two kinds ofScopedContext.Instance
implementations:MapInstance
is a simple container for an immutable map and is the only implementation that can be set in theThreadLocal
,KeyValueInstance
represents a node of a linked list ofkey/value
pairs. It is used to record differences from aMapInstance
and is converted into aMapInstance
in thewrap
methods.