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Bug fix: NPE when adding event count in ParamMapBucket (#494) 

Signed-off-by: Eric Zhao <sczyh16@gmail.com>
This commit is contained in:
Eric Zhao 2019-02-20 13:57:05 +08:00 committed by GitHub
parent ee4a0d43a1
commit 020a63fdb5
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1 changed files with 10 additions and 3 deletions
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9
sentinel-extension/sentinel-parameter-flow-control/src/main/java/com/alibaba/csp/sentinel/slots/statistic/data/ParamMapBucket.java
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@ -59,9 +59,16 @@ public class ParamMapBucket {
} }
public ParamMapBucket add(RollingParamEvent event, int count, Object value) { public ParamMapBucket add(RollingParamEvent event, int count, Object value) {
data[event.ordinal()].putIfAbsent(value, new AtomicInteger());
AtomicInteger counter = data[event.ordinal()].get(value); AtomicInteger counter = data[event.ordinal()].get(value);
// Note: not strictly concise.
if (counter == null) {
AtomicInteger old = data[event.ordinal()].putIfAbsent(value, new AtomicInteger(count));
if (old != null) {
old.addAndGet(count);
}
} else {
counter.addAndGet(count); counter.addAndGet(count);
}
return this; return this;
} }