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Polish concurrent gaugeLocks map access 

See gh-1995
This commit is contained in:
Phillip Webb 2014-12-01 14:29:22 -08:00
parent b519eda441
commit 41c15f205f
1 changed files with 3 additions and 2 deletions
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5
spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/writer/CodahaleMetricWriter.java
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@ -103,8 +103,9 @@ public class CodahaleMetricWriter implements MetricWriter {
private Object getGuageLock(String name) { private Object getGuageLock(String name) {
Object lock = this.gaugeLocks.get(name); Object lock = this.gaugeLocks.get(name);
if (lock == null) { if (lock == null) {
this.gaugeLocks.putIfAbsent(name, new Object()); Object newLock = new Object();
lock = this.gaugeLocks.get(name); lock = this.gaugeLocks.putIfAbsent(name, newLock);
lock = (lock == null ? newLock : lock);
} }
return lock; return lock;
} }