From 7ce19638c4098156b48fa675b79f6416b13a2e81 Mon Sep 17 00:00:00 2001
From: Rob Austin <rob.austin@boundedbuffer>
Date: Tue, 11 Nov 2014 17:22:07 +0000
Subject: [PATCH] HCOLL-155    change   V acquireUsing(@NotNull K key, V
 usingValue)  to included the following                   V value =
 getUsing(key, usingValue);

                  if (value != null)
                      return value;
---
 .../java/net/openhft/chronicle/map/VanillaChronicleMap.java   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java b/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
index a7b8932d5..f9d34dcb2 100644
--- a/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
+++ b/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
@@ -384,6 +384,10 @@ class VanillaChronicleMap<K, KI, MKI extends MetaBytesInterop<K, KI>,
 
     @Override
     public V acquireUsing(@NotNull K key, V usingValue) {
+        V value = getUsing(key, usingValue);
+
+        if (value != null)
+            return value;
 
         try (WriteContext<K, V> kvContext =
                      lookupUsing(key, usingValue, LockType.WRITE_LOCK, false)) {