trace.rb in opentelemetry-api-0.12.1

- old
+ new

@@ -11,12 +11,22 @@
   module Trace
     extend self
 
     CURRENT_SPAN_KEY = Context.create_key('current-span')
 
-    private_constant :CURRENT_SPAN_KEY
+    # Random number generator for generating IDs. This is an object that can
+    # respond to `#bytes` and uses the system PRNG. The current logic is
+    # compatible with Ruby 2.5 (which does not implement the `Random.bytes`
+    # class method) and with Ruby 3.0+ (which deprecates `Random::DEFAULT`).
+    # When we drop support for Ruby 2.5, this can simply be replaced with
+    # the class `Random`.
+    #
+    # @return [#bytes]
+    RANDOM = Random.respond_to?(:bytes) ? Random : Random::DEFAULT
 
+    private_constant :CURRENT_SPAN_KEY, :RANDOM
+
     # An invalid trace identifier, a 16-byte string with all zero bytes.
     INVALID_TRACE_ID = ("\0" * 16).b
 
     # An invalid span identifier, an 8-byte string with all zero bytes.
     INVALID_SPAN_ID = ("\0" * 8).b
@@ -25,21 +35,21 @@
     # non-zero byte.
     #
     # @return [String] a valid trace ID.
     def generate_trace_id
       loop do
-        id = Random::DEFAULT.bytes(16)
+        id = RANDOM.bytes(16)
         return id unless id == INVALID_TRACE_ID
       end
     end
 
     # Generates a valid span identifier, an 8-byte string with at least one
     # non-zero byte.
     #
     # @return [String] a valid span ID.
     def generate_span_id
       loop do
-        id = Random::DEFAULT.bytes(8)
+        id = RANDOM.bytes(8)
         return id unless id == INVALID_SPAN_ID
       end
     end
 
     # Returns the current span from the current or provided context