Package io.opencensus.tags.propagation
Class TagContextTextFormat.Getter<C>
java.lang.Object
io.opencensus.tags.propagation.TagContextTextFormat.Getter<C>
- Type Parameters:
C
- carrier of propagation fields, such as an http request
- Enclosing class:
TagContextTextFormat
Class that allows a
TagContextTextFormat
to read propagated fields from a carrier.
Getter
is stateless and allows to be saved as a constant to avoid runtime
allocations.
- Since:
- 0.21
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Constructor Summary
Constructors -
Method Summary
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Constructor Details
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Getter
public Getter()
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Method Details
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get
Returns the first value of the given propagationkey
or returnsnull
.- Parameters:
carrier
- carrier of propagation fields, such as an http requestkey
- the key of the field.- Returns:
- the first value of the given propagation
key
or returnsnull
. - Since:
- 0.21
-