zdm/event-bus
zdm/event-bus
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Simplify binding access calls in EventBus

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This commit is contained in:
Kai S. K. Engelbart 2021-02-15 09:25:16 +01:00
parent ebc11555f6
commit e040f6ab1b
Signed by: kske
GPG Key ID: 8BEB13EC5DF7EF13
1 changed files with 10 additions and 13 deletions
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23
event-bus-core/src/main/java/dev/kske/eventbus/core/EventBus.java
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@ -51,11 +51,12 @@ public final class EventBus {
return instance; return instance;
} }
private final Map<Class<? extends IEvent>, TreeSet<EventHandler>> bindings private final Map<Class<? extends IEvent>, TreeSet<EventHandler>> bindings =
= new ConcurrentHashMap<>(); new ConcurrentHashMap<>();
private final Set<EventListener> registeredListeners = ConcurrentHashMap.newKeySet(); private final Set<EventListener> registeredListeners =
private final ThreadLocal<DispatchState> dispatchState ConcurrentHashMap.newKeySet();
= ThreadLocal.withInitial(DispatchState::new); private final ThreadLocal<DispatchState> dispatchState =
ThreadLocal.withInitial(DispatchState::new);
/** /**
* Dispatches an event to all event handlers registered for it in descending order of their * Dispatches an event to all event handlers registered for it in descending order of their
@ -97,9 +98,7 @@ public final class EventBus {
private List<EventHandler> getHandlersFor(Class<? extends IEvent> eventClass) { private List<EventHandler> getHandlersFor(Class<? extends IEvent> eventClass) {
// Get handlers defined for the event class // Get handlers defined for the event class
Set<EventHandler> handlers Set<EventHandler> handlers = bindings.getOrDefault(eventClass, new TreeSet<>());
= bindings.containsKey(eventClass) ? bindings.get(eventClass)
: new TreeSet<>();
// Get subtype handlers // Get subtype handlers
for (var binding : bindings.entrySet()) for (var binding : bindings.entrySet())
@ -151,20 +150,18 @@ public final class EventBus {
// Initialize and bind the handler // Initialize and bind the handler
var handler = new EventHandler(listener, method, annotation); var handler = new EventHandler(listener, method, annotation);
if (!bindings.containsKey(handler.getEventType())) bindings.putIfAbsent(handler.getEventType(), new TreeSet<>());
bindings.put(handler.getEventType(), new TreeSet<>());
logger.log(Level.DEBUG, "Binding event handler {0}", handler); logger.log(Level.DEBUG, "Binding event handler {0}", handler);
bindings.get(handler.getEventType()) bindings.get(handler.getEventType())
.add(handler); .add(handler);
handlerBound = true; handlerBound = true;
} }
if(!handlerBound) if (!handlerBound)
logger.log( logger.log(
Level.WARNING, Level.WARNING,
"No event handlers bound for event listener {0}", "No event handlers bound for event listener {0}",
listener.getClass().getName() listener.getClass().getName());
);
} }
/** /**