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Update IslandLevelCalculator.java (#314)

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Fix for occasional errors likely due to the use of the remove() method within a lambda expression inside the thenAccept method. This lambda expression is executed asynchronously, which means that the iterator may not be in a consistent state when remove() is called.
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tastybento 2024-05-31 13:11:57 -07:00 committed by GitHub
parent 5dee0d2426
commit 0bb6eacaf7
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1 changed files with 32 additions and 22 deletions
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src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java
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@ -638,27 +638,37 @@ public class IslandLevelCalculator {
}
private void handleStackedBlocks() {
// Deal with any stacked blocks
Iterator<Location> it = stackedBlocks.iterator();
while (it.hasNext()) {
Location v = it.next();
Util.getChunkAtAsync(v).thenAccept(c -> {
Block stackedBlock = v.getBlock();
boolean belowSeaLevel = seaHeight > 0 && v.getBlockY() <= seaHeight;
if (WildStackerAPI.getWildStacker().getSystemManager().isStackedBarrel(stackedBlock)) {
StackedBarrel barrel = WildStackerAPI.getStackedBarrel(stackedBlock);
int barrelAmt = WildStackerAPI.getBarrelAmount(stackedBlock);
for (int _x = 0; _x < barrelAmt; _x++) {
checkBlock(barrel.getType(), belowSeaLevel);
}
} else if (WildStackerAPI.getWildStacker().getSystemManager().isStackedSpawner(stackedBlock)) {
int spawnerAmt = WildStackerAPI.getSpawnersAmount((CreatureSpawner) stackedBlock.getState());
for (int _x = 0; _x < spawnerAmt; _x++) {
checkBlock(stackedBlock.getType(), belowSeaLevel);
}
}
it.remove();
});
}
// Deal with any stacked blocks
List<Location> toRemove = new ArrayList<>();
Iterator<Location> it = stackedBlocks.iterator();
while (it.hasNext()) {
Location v = it.next();
Util.getChunkAtAsync(v).thenAccept(c -> {
Block stackedBlock = v.getBlock();
boolean belowSeaLevel = seaHeight > 0 && v.getBlockY() <= seaHeight;
if (WildStackerAPI.getWildStacker().getSystemManager().isStackedBarrel(stackedBlock)) {
StackedBarrel barrel = WildStackerAPI.getStackedBarrel(stackedBlock);
int barrelAmt = WildStackerAPI.getBarrelAmount(stackedBlock);
for (int _x = 0; _x < barrelAmt; _x++) {
checkBlock(barrel.getType(), belowSeaLevel);
}
} else if (WildStackerAPI.getWildStacker().getSystemManager().isStackedSpawner(stackedBlock)) {
int spawnerAmt = WildStackerAPI.getSpawnersAmount((CreatureSpawner) stackedBlock.getState());
for (int _x = 0; _x < spawnerAmt; _x++) {
checkBlock(stackedBlock.getType(), belowSeaLevel);
}
}
synchronized (toRemove) {
toRemove.add(v);
}
});
}
// Wait for all asynchronous tasks to complete before removing elements
// Remove the elements collected in toRemove
synchronized (toRemove) {
stackedBlocks.removeAll(toRemove);
}
}
}