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[tor-commits] [metrics-lib/release] Use 'putIfAbsent'.



commit 3efd91716902e7592304e78bd78ab95d961869ff
Author: iwakeh <iwakeh@xxxxxxxxxxxxxx>
Date:   Sat Feb 3 08:19:55 2018 +0000

    Use 'putIfAbsent'.
---
 .../org/torproject/descriptor/log/WebServerAccessLogLine.java     | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/main/java/org/torproject/descriptor/log/WebServerAccessLogLine.java b/src/main/java/org/torproject/descriptor/log/WebServerAccessLogLine.java
index a4e3ce6..4884733 100644
--- a/src/main/java/org/torproject/descriptor/log/WebServerAccessLogLine.java
+++ b/src/main/java/org/torproject/descriptor/log/WebServerAccessLogLine.java
@@ -147,12 +147,8 @@ public class WebServerAccessLogLine {
 
   private static <T> T fromMap(T val, Map<T, T> map) {
     synchronized (map) {
-      T reference = map.get(val);
-      if (null == reference) {
-        map.put(val, val);
-        reference = map.get(val);
-      }
-      return reference;
+      map.putIfAbsent(val, val);
+      return map.get(val);
     }
   }
 



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