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package gregtech.api.threads;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.common.gameevent.TickEvent;
import gregtech.GT_Mod;
import gregtech.api.GregTech_API;
import gregtech.api.interfaces.tileentity.IMachineBlockUpdateable;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.ChunkCoordinates;
import net.minecraft.world.World;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
public class GT_Runnable_MachineBlockUpdate implements Runnable {
// used by runner thread
private final ChunkCoordinates mCoords;
private final World world;
private final Set<ChunkCoordinates> visited = new HashSet<>(80);
private final Queue<ChunkCoordinates> tQueue = new LinkedList<>();
// Locking
private static ReentrantLock lock = new ReentrantLock();
// Threading
private static final ThreadFactory THREAD_FACTORY = r -> {
Thread thread = new Thread(r);
thread.setName("GT_MachineBlockUpdate");
return thread;
};
private static ExecutorService EXECUTOR_SERVICE;
// This class should never be initiated outside of this class!
private GT_Runnable_MachineBlockUpdate(World aWorld, ChunkCoordinates aCoords) {
this.world = aWorld;
this.mCoords = aCoords;
visited.add(aCoords);
tQueue.add(aCoords);
}
@SubscribeEvent
public void onServerTick(TickEvent.ServerTickEvent aEvent) {
if (aEvent.phase == TickEvent.Phase.START) {
lock.lock();
} else {
lock.unlock();
}
}
public static boolean isEnabled() {
return isEnabled;
}
public static void setEnabled() {
GT_Runnable_MachineBlockUpdate.isEnabled = true;
}
public static void setDisabled() {
GT_Runnable_MachineBlockUpdate.isEnabled = false;
}
public static void setEnabled(boolean isEnabled) {
GT_Runnable_MachineBlockUpdate.isEnabled = isEnabled;
}
private static boolean isEnabled = true;
public static void setMachineUpdateValues(World aWorld, ChunkCoordinates aCoords) {
if (isEnabled) {
aWorld.getTileEntity(aCoords.posX, aCoords.posY, aCoords.posZ);
EXECUTOR_SERVICE.submit(new GT_Runnable_MachineBlockUpdate(aWorld, aCoords));
}
}
public static void initExecutorService() {
EXECUTOR_SERVICE = Executors.newFixedThreadPool((Runtime.getRuntime().availableProcessors() * 2 / 3), THREAD_FACTORY);
}
public static void shutdownExecutorService() {
try {
GT_Mod.GT_FML_LOGGER.info("Shutting down Machine block update executor service");
EXECUTOR_SERVICE.shutdown(); // Disable new tasks from being submitted
// Wait a while for existing tasks to terminate
if (!EXECUTOR_SERVICE.awaitTermination(60, TimeUnit.SECONDS)) {
EXECUTOR_SERVICE.shutdownNow(); // Cancel currently executing tasks
// Wait a while for tasks to respond to being cancelled
if (!EXECUTOR_SERVICE.awaitTermination(60, TimeUnit.SECONDS)) {
GT_Mod.GT_FML_LOGGER.error("Well this didn't terminated well... GT_Runnable_MachineBlockUpdate.shutdownExecutorService");
}
}
} catch (InterruptedException ie) {
GT_Mod.GT_FML_LOGGER.error("Well this interruption got interrupted...", ie);
// (Re-)Cancel if current thread also interrupted
EXECUTOR_SERVICE.shutdownNow();
// Preserve interrupt status
Thread.currentThread().interrupt();
}catch (Exception e){
GT_Mod.GT_FML_LOGGER.error("Well this didn't terminated well...", e);
// (Re-)Cancel in case
EXECUTOR_SERVICE.shutdownNow();
}finally {
GT_Mod.GT_FML_LOGGER.info("Leaving... GT_Runnable_MachineBlockUpdate.shutdownExecutorService");
}
}
@Override
public void run() {
try {
while (!tQueue.isEmpty()) {
final ChunkCoordinates aCoords = tQueue.poll();
// This might load a chunk... which might load a TileEntity... which might get added to `loadedTileEntityList`... which might be in the process
// of being iterated over during `UpdateEntities()`... which might cause a ConcurrentModificationException. So, lock that shit.
lock.lock();
TileEntity tTileEntity = world.getTileEntity(aCoords.posX, aCoords.posY, aCoords.posZ);
lock.unlock();
// See if the block itself needs an update
if (tTileEntity instanceof IMachineBlockUpdateable)
((IMachineBlockUpdateable) tTileEntity).onMachineBlockUpdate();
// Now see if we should add the nearby blocks to the queue:
// 1) If we've visited less than 5 blocks, then yes
// 2) If the tile says we should recursively updated (pipes don't, machine blocks do)
// 3) If the block at the coordinates is marked as a machine block
if (visited.size() < 5
|| (tTileEntity instanceof IMachineBlockUpdateable && ((IMachineBlockUpdateable) tTileEntity).isMachineBlockUpdateRecursive())
|| GregTech_API.isMachineBlock(world.getBlock(aCoords.posX, aCoords.posY, aCoords.posZ), world.getBlockMetadata(aCoords.posX, aCoords.posY, aCoords.posZ)))
{
ChunkCoordinates tCoords;
if (visited.add(tCoords = new ChunkCoordinates(aCoords.posX + 1, aCoords.posY, aCoords.posZ))) tQueue.add(tCoords);
if (visited.add(tCoords = new ChunkCoordinates(aCoords.posX - 1, aCoords.posY, aCoords.posZ))) tQueue.add(tCoords);
if (visited.add(tCoords = new ChunkCoordinates(aCoords.posX, aCoords.posY + 1, aCoords.posZ))) tQueue.add(tCoords);
if (visited.add(tCoords = new ChunkCoordinates(aCoords.posX, aCoords.posY - 1, aCoords.posZ))) tQueue.add(tCoords);
if (visited.add(tCoords = new ChunkCoordinates(aCoords.posX, aCoords.posY, aCoords.posZ + 1))) tQueue.add(tCoords);
if (visited.add(tCoords = new ChunkCoordinates(aCoords.posX, aCoords.posY, aCoords.posZ - 1))) tQueue.add(tCoords);
}
}
} catch (Exception e) {
GT_Mod.GT_FML_LOGGER.error(
"Well this update was broken... " + mCoords + ", mWorld={" + world.getProviderName() + " @dimId " + world.provider.dimensionId + "}", e);
}
}
}
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