On Tue, 29 Jun 2021 19:35:40 GMT, Weijun Wang <wei...@openjdk.org> wrote:
>> Using a HashSet<Class> could use the callerClass as the key and be a stable >> reference for having given the message. >> or use a ConcurrentHashMap<Class<?>>, boolean> and avoid any separate >> synchronization that would be needed with a HashSet or HashMap. > > If I switch to a "non-weak" set or map, then it seems I can safely use the > source string as the key. Will using the Class object as a key prevent them > from unloading? Using a synchronized WeakHashMap with the class as the key would not prevent class unloading. Using a non-weak set or map to strings would keep the strings around for the life of the runtime. ------------- PR: https://git.openjdk.java.net/jdk17/pull/166
