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require 'forwardable'
require 'opentracing/version'
require 'opentracing/span_context'
require 'opentracing/span'
require 'opentracing/reference'
require 'opentracing/tracer'
require 'opentracing/scope'
require 'opentracing/scope_manager'
#:nodoc:
module OpenTracing
# Text format for Tracer#inject and Tracer#extract.
#
# The carrier for FORMAT_TEXT_MAP should be a Hash with string values.
FORMAT_TEXT_MAP = 1
# Binary format for #inject and #extract
#
# The carrier for FORMAT_BINARY should be a string, treated as a raw sequence
# of bytes.
FORMAT_BINARY = 2
# Due to Rack's popularity within the Ruby community, OpenTracing-Ruby
# provides a Rack-specific format for injection into and extraction from HTTP
# headers specifically, though there are some strings attached.
#
# The carrier for FORMAT_RACK should be `env` or equivalent. It behaves like
# FORMAT_TEXT_MAP, but with all keys transformed per Rack's treatment of HTTP
# headers. Keep in mind that Rack automatically uppercases all headers and
# replaces dashes with underscores. This means that if you use dashes and
# underscores and case-sensitive baggage keys, they may collide or become
# unrecognizable.
FORMAT_RACK = 3
class << self
extend Forwardable
# Global tracer to be used when OpenTracing.start_span, inject or extract is called
attr_accessor :global_tracer
def_delegators :global_tracer, :scope_manager, :start_active_span,
:start_span, :inject, :extract, :active_span
end
end
# Default to the no-op tracer
OpenTracing.global_tracer = OpenTracing::Tracer.new
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