From 0f6761dd4bd71caeb16a9dc7cf495cdaf7cbc556 Mon Sep 17 00:00:00 2001
From: Andrew Kent <andrew.kent@datadoghq.com>
Date: Fri, 20 Jul 2018 16:30:02 -0700
Subject: [PATCH] Optimize Instrumenter logging

---
 .../trace/agent/tooling/Instrumenter.java      | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/Instrumenter.java b/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/Instrumenter.java
index ba9483cb18..542d76444b 100644
--- a/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/Instrumenter.java
+++ b/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/Instrumenter.java
@@ -128,15 +128,23 @@ public interface Instrumenter {
           final List<Reference.Mismatch> mismatches =
               muzzle.getMismatchedReferenceSources(classLoader);
           if (mismatches.size() > 0) {
+            if (log.isDebugEnabled()) {
+              log.debug(
+                  "Instrumentation muzzled: {} -- {} on {}",
+                  instrumentationPrimaryName,
+                  this.getClass().getName(),
+                  classLoader);
+              for (Reference.Mismatch mismatch : mismatches) {
+                log.debug("-- {}", mismatch);
+              }
+            }
+          } else {
             log.debug(
-                "Instrumentation muzzled: {} -- {} on {}",
+                "Applying instrumentation: {} -- {} on {}",
                 instrumentationPrimaryName,
-                getClass().getName(),
+                this.getClass().getName(),
                 classLoader);
           }
-          for (final Reference.Mismatch mismatch : mismatches) {
-            log.debug("-- {}", mismatch);
-          }
           return mismatches.size() == 0;
         }
         return true;