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Add defensive code to EventBus to catch unexpected exceptions

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catbref 2020-12-10 11:55:06 +00:00
parent 8707f154ee
commit acc616c204
1 changed files with 11 additions and 1 deletions
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12
src/main/java/org/qortal/event/EventBus.java
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@ -3,9 +3,14 @@ package org.qortal.event;
import java.util.ArrayList; import java.util.ArrayList;
import java.util.List; import java.util.List;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public enum EventBus { public enum EventBus {
INSTANCE; INSTANCE;
private static final Logger LOGGER = LogManager.getLogger(EventBus.class);
private static final List<Listener> LISTENERS = new ArrayList<>(); private static final List<Listener> LISTENERS = new ArrayList<>();
public void addListener(Listener newListener) { public void addListener(Listener newListener) {
@ -50,6 +55,11 @@ public enum EventBus {
} }
for (Listener listener : clonedListeners) for (Listener listener : clonedListeners)
listener.listen(event); try {
listener.listen(event);
} catch (Exception e) {
// We don't want one listener to break other listeners, or caller
LOGGER.warn(() -> String.format("Caught %s from a listener processing %s", e.getClass().getSimpleName(), event.getClass().getSimpleName()), e);
}
} }
} }