ilgrosso commented on code in PR #571:
URL: https://github.com/apache/syncope/pull/571#discussion_r1421355741
##########
core/provisioning-java/src/main/java/org/apache/syncope/core/provisioning/java/pushpull/LDAPMembershipPullActions.java:
##########
@@ -155,8 +156,10 @@ public void beforeUpdate(
groupDAO.findUMemberships(groupDAO.find(entity.getKey())).forEach(uMembership
-> {
Set<String> memb =
membershipsBefore.get(uMembership.getLeftEnd().getKey());
if (memb == null) {
- memb = new HashSet<>();
- membershipsBefore.put(uMembership.getLeftEnd().getKey(), memb);
+ memb = Collections.synchronizedSet(new HashSet<>());
Review Comment:
This snippet should be replaced by using
`ConcurrentHashMap#computeIfAbsent`, which involves declaring both maps as
`ConcurrentMap` - see
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html#computeIfAbsent-K-java.util.function.Function-
e.g.
```java
Set<String> memb = membershipsBefore.computeIfAbsent(
uMembership.getLeftEnd().getKey(),
k -> Collections.synchronizedSet(new HashSet<>()));
memb.add(entity.getKey());
```
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