Github user ahgittin commented on a diff in the pull request:
https://github.com/apache/incubator-brooklyn/pull/595#discussion_r28478044
--- Diff: core/src/main/java/brooklyn/event/basic/MapConfigKey.java ---
@@ -125,6 +130,20 @@ protected Object applyEntryValueToMap(Entry value, Map
target) {
} else if (k instanceof String) {
k = subKey((String)k);
} else {
+ // supplier or other unexpected value
+ if (k instanceof Supplier) {
+ // TODO not thread-safe
+ Object mapAtRoot = target.get(this);
+ if (mapAtRoot==null) {
+ mapAtRoot = new LinkedHashMap();
+ target.put(this, mapAtRoot);
+ }
+ if (mapAtRoot instanceof Map) {
+ synchronized (mapAtRoot) {
--- End diff --
often the map will be what we `put` just above -- ie an LHMap, and
sometimes it will come from another source, e.g. yaml parse (also often an
LHMap).
in most cases synching on the map is the standard way to synchronize. it's
not foolproof of course. but feels likely to cause a problem than a CME on an
LHMap.
will add a comment to that effect.
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