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Make the EventBus faster by avoiding Map#entrySet

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Vankka 2022-01-25 16:24:17 +02:00
parent 9662d9515f
commit 9cfaae7464
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GPG Key ID: 6E50CB7A29B96AD0
2 changed files with 49 additions and 40 deletions
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19
common/src/main/java/com/discordsrv/common/event/bus/EventBusImpl.java
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@ -53,6 +53,7 @@ public class EventBusImpl implements EventBus {
);
private final Map<Object, List<EventListenerImpl>> listeners = new ConcurrentHashMap<>();
private final List<EventListenerImpl> allListeners = new CopyOnWriteArrayList<>();
private final DiscordSRV discordSRV;
private final Logger logger;
@ -76,7 +77,7 @@ public class EventBusImpl implements EventBus {
Class<?> currentClass = listenerClass;
do {
for (Method method : currentClass.getDeclaredMethods()) {
checkMethod(listenerClass, method, suppressedMethods, methods, methodsByPriority);
checkMethod(eventListener, listenerClass, method, suppressedMethods, methods, methodsByPriority);
}
} while ((currentClass = currentClass.getSuperclass()) != null);
@ -88,10 +89,11 @@ public class EventBusImpl implements EventBus {
}
listeners.put(eventListener, methods);
allListeners.addAll(methods);
logger.debug("Listener " + eventListener.getClass().getName() + " subscribed");
}
private void checkMethod(Class<?> listenerClass, Method method,
private void checkMethod(Object eventListener, Class<?> listenerClass, Method method,
List<Throwable> suppressedMethods, List<EventListenerImpl> methods,
EnumMap<EventPriority, List<EventListenerImpl>> methodsByPriority) {
Subscribe annotation = method.getAnnotation(Subscribe.class);
@ -140,7 +142,7 @@ public class EventBusImpl implements EventBus {
}
EventPriority eventPriority = annotation.priority();
EventListenerImpl listener = new EventListenerImpl(listenerClass, annotation, firstParameter, method);
EventListenerImpl listener = new EventListenerImpl(eventListener, listenerClass, annotation, firstParameter, method);
methods.add(listener);
methodsByPriority.computeIfAbsent(eventPriority, key -> new CopyOnWriteArrayList<>())
@ -154,9 +156,12 @@ public class EventBusImpl implements EventBus {
@Override
public void unsubscribe(@NotNull Object eventListener) {
listeners.remove(eventListener);
List<EventListenerImpl> removed = listeners.remove(eventListener);
if (removed != null) {
allListeners.removeAll(removed);
logger.debug("Listener " + eventListener.getClass().getName() + " unsubscribed");
}
}
@Override
public void publish(@NotNull Event event) {
@ -182,9 +187,7 @@ public class EventBusImpl implements EventBus {
Class<?> eventClass = event.getClass();
for (EventPriority priority : EventPriority.values()) {
for (Map.Entry<Object, List<EventListenerImpl>> entry : listeners.entrySet()) {
Object listener = entry.getKey();
for (EventListenerImpl eventListener : entry.getValue()) {
for (EventListenerImpl eventListener : allListeners) {
if (eventListener.isIgnoringCancelled() && event instanceof Cancellable && ((Cancellable) event).isCancelled()) {
continue;
}
@ -197,6 +200,7 @@ public class EventBusImpl implements EventBus {
long startTime = System.currentTimeMillis();
try {
Object listener = eventListener.listener();
eventListener.method().invoke(listener, event);
} catch (IllegalAccessException e) {
discordSRV.logger().error("Failed to access listener method: " + eventListener.methodName(), e);
@ -224,7 +228,6 @@ public class EventBusImpl implements EventBus {
}
}
}
}
// Clear the states
for (Pair<Function<Object, Boolean>, ThreadLocal<EventListener>> state : STATES) {

8
common/src/main/java/com/discordsrv/common/event/bus/EventListenerImpl.java
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@ -27,12 +27,14 @@ import java.lang.reflect.Method;
public class EventListenerImpl implements EventListener {
private final Object listener;
private final Class<?> listenerClass;
private final Subscribe annotation;
private final Class<?> eventClass;
private final Method method;
public EventListenerImpl(Class<?> listenerClass, Subscribe annotation, Class<?> eventClass, Method method) {
public EventListenerImpl(Object listener, Class<?> listenerClass, Subscribe annotation, Class<?> eventClass, Method method) {
this.listener = listener;
this.listenerClass = listenerClass;
this.annotation = annotation;
this.eventClass = eventClass;
@ -47,6 +49,10 @@ public class EventListenerImpl implements EventListener {
return annotation.priority();
}
public Object listener() {
return listener;
}
public Class<?> eventClass() {
return eventClass;
}