UseBlockEvent

Package: com.hypixel.hytale.server.core.event.events.ecs Extends: EcsEvent Cancellable: No (base class) — see inner classes below

Abstract ECS event dispatched when a player interacts with (uses) a block. Uses a Pre/Post pattern: UseBlockEvent.Pre fires before the interaction and can be cancelled, while UseBlockEvent.Post fires after the interaction has completed.

Fields / Accessors (Base Class)

Field	Type	Accessor	Mutable	Nullable
interactionType	InteractionType	getInteractionType()	No	No
context	InteractionContext	getContext()	No	No
targetBlock	Vector3i	getTargetBlock()	No	No
blockType	BlockType	getBlockType()	No	No

• interactionType — The type of interaction being performed on the block.
• context — Additional context about the interaction.
• targetBlock — The world-space coordinates of the block being used.
• blockType — The type of block being interacted with.

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UseBlockEvent.Pre

Extends: UseBlockEvent Implements: ICancellableEcsEvent Cancellable: Yes

Fired before the block interaction takes effect. Cancelling this event prevents the interaction from occurring.

Fired By

• UseBlockInteraction.execute (line 65) via commandBuffer.invoke(ref, event) — ECS dispatch before block use takes effect.

Listening

public class MyUseBlockPreHandler extends EntityEventSystem<EntityStore, UseBlockEvent.Pre> {
    @Override
    public Query<EntityStore> getQuery() {
        return MY_COMPONENT_TYPE;
    }

    @Override
    public void handle(int index, ArchetypeChunk<EntityStore> chunk,
                       Store<EntityStore> store, CommandBuffer<EntityStore> commandBuffer,
                       UseBlockEvent.Pre event) {
        BlockType blockType = event.getBlockType();

        // Example: prevent interaction with certain blocks
        if (blockType == BlockType.LOCKED_CHEST) {
            event.setCancelled(true);
        }
    }
}

// Register in plugin setup():
getEntityStoreRegistry().registerSystem(new MyUseBlockPreHandler());

---

UseBlockEvent.Post

Extends: UseBlockEvent Cancellable: No

Fired after the block interaction has completed. This is an informational event — the interaction has already occurred and cannot be undone.

Fired By

• UseBlockInteraction.execute (line 76) via commandBuffer.invoke(ref, event) — ECS dispatch after block use completes.

Listening

public class MyUseBlockPostHandler extends EntityEventSystem<EntityStore, UseBlockEvent.Post> {
    @Override
    public Query<EntityStore> getQuery() {
        return MY_COMPONENT_TYPE;
    }

    @Override
    public void handle(int index, ArchetypeChunk<EntityStore> chunk,
                       Store<EntityStore> store, CommandBuffer<EntityStore> commandBuffer,
                       UseBlockEvent.Post event) {
        BlockType blockType = event.getBlockType();
        Vector3i target = event.getTargetBlock();

        // Example: log block interactions for analytics
        logger.info("Block used: {} at {}", blockType, target);
    }
}

// Register in plugin setup():
getEntityStoreRegistry().registerSystem(new MyUseBlockPostHandler());

Related Events

• BreakBlockEvent — Fired when a block is mined/destroyed, as opposed to interacted with.
• PlaceBlockEvent — Fired when a block is placed.
• LivingEntityUseBlockEvent — Deprecated standard-event predecessor.