class Gruf::Lightstep::Headers
Abstraction accessor class for B3 propagation headers across GRPC ActiveCall objects
Constants
- OT_KEYS
@property [Hash<Symbol|Array<String>>] Hash mapping of metadata keys
Attributes
active_call[R]
Public Class Methods
new(active_call)
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@param [GRPC::ActiveCall] active_call
# File lib/gruf/lightstep/headers.rb, line 42 def initialize(active_call) @active_call = active_call end
Public Instance Methods
metadata()
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@return [Hash]
# File lib/gruf/lightstep/headers.rb, line 64 def metadata @active_call.metadata end
to_h()
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@return [Hash]
# File lib/gruf/lightstep/headers.rb, line 71 def to_h @active_call.metadata end
value(key)
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Return a B3 propagation header if present
@param [Symbol] key @return [String|NilClass]
# File lib/gruf/lightstep/headers.rb, line 52 def value(key) return nil unless OT_KEYS.key?(key) OT_KEYS[key].each do |k| return metadata[k] if metadata.key?(k) end nil end