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Reduce listener count

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This commit is contained in:
TheMode 2021-08-22 03:08:37 +02:00
parent 6f88abf987
commit 9c7c409fae
1 changed files with 33 additions and 19 deletions
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52
src/main/java/net/minestom/server/event/EventNodeImpl.java
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@ -327,8 +327,10 @@ class EventNodeImpl<T extends Event> implements EventNode<T> {
for (var mappedEntry : mappedNodeCache.entrySet()) {
final EventNodeImpl<E> mappedNode = mappedEntry.getValue();
if (!mappedNode.eventType.isAssignableFrom(eventType)) continue;
if (mappedNode.listenerMap.isEmpty())
final var listenerMap = mappedNode.listenerMap;
if (listenerMap.isEmpty())
continue; // The mapped node does not have any listener (perhaps throw a warning?)
if (!listenerMap.containsKey(eventType)) continue;
filters.add(mappedNode.filter);
handlers.put(mappedEntry.getKey(), Pair.of(mappedNode, mappedNode.getHandle(eventType)));
}
@ -366,25 +368,37 @@ class EventNodeImpl<T extends Event> implements EventNode<T> {
private void appendEntries(ListenerEntry<E> entry, EventNodeImpl<E> targetNode) {
final var filter = targetNode.filter;
final var predicate = targetNode.predicate;
// Normal listeners
for (var listener : entry.listeners) {
if (predicate != null) {
// Ensure that the event is valid before running
this.listeners.add(e -> {
final var value = filter.getHandler(e);
if (!predicate.test(e, value)) return;
callListener(targetNode, listener, e);
});
} else {
// No predicate, run directly
this.listeners.add(e -> callListener(targetNode, listener, e));
final boolean hasPredicate = predicate != null;
final var listenersCopy = List.copyOf(entry.listeners);
final var bindingsCopy = List.copyOf(entry.bindingConsumers);
if (!hasPredicate && listenersCopy.isEmpty() && bindingsCopy.isEmpty())
return; // Nothing to run
if (!hasPredicate && bindingsCopy.isEmpty() && listenersCopy.size() == 1) {
// Only one normal listener
final EventListener<E> listener = listenersCopy.get(0);
this.listeners.add(e -> callListener(targetNode, listener, e));
return;
}
// Worth case scenario, try to run everything
this.listeners.add(e -> {
if (hasPredicate) {
final var value = filter.getHandler(e);
if (!predicate.test(e, value)) return;
}
}
// Bindings
final var bindingConsumers = entry.bindingConsumers;
if (!bindingConsumers.isEmpty()) { // Ensure no array clone
this.listeners.addAll(bindingConsumers);
}
if (!listenersCopy.isEmpty()) {
for (EventListener<E> listener : listenersCopy) {
callListener(targetNode, listener, e);
}
}
if (!bindingsCopy.isEmpty()) {
for (Consumer<E> eConsumer : bindingsCopy) {
eConsumer.accept(e);
}
}
});
}
static <E extends Event> void callListener(EventNodeImpl<E> targetNode, EventListener<E> listener, E event) {