lib/ddtrace/ext/sampling.rb in ddtrace-0.30.1 vs lib/ddtrace/ext/sampling.rb in ddtrace-0.31.0

@@ -1,7 +1,10 @@
 module Datadog
   module Ext
     module Sampling
+      ENV_SAMPLE_RATE = 'DD_TRACE_SAMPLE_RATE'.freeze
+      ENV_RATE_LIMIT = 'DD_TRACE_RATE_LIMIT'.freeze
+
       # If rule sampling is applied to a span, set this metric the sample rate configured for that rule.
       # This should be done regardless of sampling outcome.
       RULE_SAMPLE_RATE = '_dd.rule_psr'.freeze
 
       # If rate limiting is checked on a span, set this metric the effective rate limiting rate applied.