Github user sjcorbett commented on a diff in the pull request: https://github.com/apache/incubator-brooklyn/pull/1110#discussion_r47898623 --- Diff: core/src/main/java/org/apache/brooklyn/core/sensor/AttributeMap.java --- @@ -59,7 +60,20 @@ * Creates a new AttributeMap. * * @param entity the EntityLocal this AttributeMap belongs to. - * @throws IllegalArgumentException if entity is null + * @throws NullPointerException if entity is null + */ + public AttributeMap(AbstractEntity entity) { + // Not using ConcurrentMap, because want to (continue to) allow null values. + // Could use ConcurrentMapAcceptingNullVals (with the associated performance hit on entrySet() etc). + this(entity, Collections.synchronizedMap(Maps.<Collection<String>, Object>newLinkedHashMap())); + } + + /** + * Creates a new AttributeMap. + * + * @param entity the EntityLocal this AttributeMap belongs to. + * @param values the Map in which to store the values - should be concurrent or synchronized. --- End diff -- values should be storage.
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