Bukkit drop exploded blocks

Question

I am using the Bukkit 1.8.3 API with Java 7.

I have code that explodes blocks upon when you break it. It launches an explosion that breaks blocks around the block you just broke. My problem is that the exploded blocks are not dropping, just the one that the player has broke already. I have tried to fix it by adding this event (also, my events are registered):

@EventHandler
public void onEntityDamage(EntityDamageByBlockEvent e)
{
    if(e.getCause().equals(DamageCause.BLOCK_EXPLOSION))
    {
        if (explosive)
        {
            e.setCancelled(true);
        }
    }
}

This stops the player from being damaged, but not the blocks from being dropped. I thought that since the dropped block is an entity this would work. However it is not. So how would I get the exploded blocks to drop?

This is the code I use to explode the block in the first place:

loc.getWorld().createExplosion(loc, lvl1);

loc is the block location. lvl1 is the float for the radius of the explosion.

Answer 1

This cause of this is fairly simple: explosions generally don't drop all of the blocks by default.

You can, however, change this: Listen to the BlockExplodeEvent, and then call setYield with a value of 1. Add this event handler:

@EventHandler
public void onBlockExplosion(BlockExplodeEvent e) {
    e.setYield(1);
}

You might want to add some kind of check as to whether the explosion was caused by your plugin, though.

---

If that doesn't work, you can use this code instead:

@EventHandler
public void onBlockExplosion(BlockExplodeEvent e) {
    for (Block block : e.blockList()) {
        block.breakNaturally();
    }
}

The above code works, but it will probably break any other plugin that does stuff with the blockList, as all of the blocks will become air. As such, I strongly recommend using the first code if you can.

---

BlockExplodeEvent seems to be only in the newest versions; if you don't have it, you'll need to update. It's found in both 1.8 releases, but only the most recent updates.

Here's the pom you'll need:

<repositories>
    <repository>
        <id>spigot-repo</id>
        <url>https://hub.spigotmc.org/nexus/content/groups/public/</url>
    </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>org.bukkit</groupId>
        <artifactId>bukkit</artifactId>
        <version>1.8.3-R0.1-SNAPSHOT</version>
    </dependency>
</dependencies>

You will also need to do Maven -> Update, and then make sure that "Force Update of Shapshots/Releases" is checked.