re-introduce time-based calculation quota

player initiated crafting calculation is not affected

src/main/java/appeng/crafting/CraftingJob.java

@@ -59,6 +59,7 @@ public class CraftingJob implements Runnable, ICraftingJob
 	private final IItemList<IAEItemStack> missing = AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ).createList();
 	private final HashMap<String, TwoIntegers> opsAndMultiplier = new HashMap<>();
 	private final Object monitor = new Object();
+	private final Stopwatch watch = Stopwatch.createUnstarted();
 	private CraftingTreeNode tree;
 	private final IAEItemStack output;
 	private boolean simulate = false;
@@ -66,7 +67,10 @@ public class CraftingJob implements Runnable, ICraftingJob
 	private long bytes = 0;
 	private final IActionSource actionSrc;
 	private final ICraftingCallback callback;
+	private boolean running = false;
 	private boolean done = false;
+	private int time;
+	private int incTime;
 
 	private World wrapWorld( final World w )
 	{
@@ -133,6 +137,7 @@ public class CraftingJob implements Runnable, ICraftingJob
 			try
 			{
 				TickHandler.INSTANCE.registerCraftingSimulation( this.world, this );
+				this.handlePausing();
 
 				final Stopwatch timer = Stopwatch.createStarted();
 
@@ -214,6 +219,41 @@ public class CraftingJob implements Runnable, ICraftingJob
 		this.finish();
 	}
 
+	void handlePausing() throws InterruptedException
+	{
+		if( !this.actionSrc.player().isPresent() && this.incTime > 100 )
+		{
+			this.incTime = 0;
+			synchronized ( this.monitor )
+			{
+				if( this.watch.elapsed( TimeUnit.MICROSECONDS ) > this.time )
+				{
+					this.running = false;
+					this.watch.stop();
+					this.monitor.notify();
+				}
+
+				if( !this.running )
+				{
+					AELog.craftingDebug( "crafting job will now sleep" );
+
+					while ( !this.running )
+					{
+						this.monitor.wait();
+					}
+
+					AELog.craftingDebug( "crafting job now active" );
+				}
+			}
+
+			if( Thread.interrupted() )
+			{
+				throw new InterruptedException();
+			}
+		}
+		this.incTime++;
+	}
+
 	private void finish()
 	{
 		if( this.callback != null )
@@ -225,6 +265,7 @@ public class CraftingJob implements Runnable, ICraftingJob
 
 		synchronized( this.monitor )
 		{
+			this.running = false;
 			this.done = true;
 			this.monitor.notify();
 		}
@@ -270,13 +311,41 @@ public class CraftingJob implements Runnable, ICraftingJob
 	/**
 	 * @return true if this needs more simulation
 	 */
-	public boolean simulateFor()
+	public boolean simulateFor(final int milli)
 	{
-		synchronized( this.monitor ) {
-			if ( this.done ) {
+		this.time = milli;
+
+		synchronized ( this.monitor )
+		{
+			if( this.done )
+			{
 				return false;
 			}
+			if( !this.actionSrc.player().isPresent() )
+			{
+				this.watch.reset();
+				this.watch.start();
+				this.running = true;
+
+				AELog.craftingDebug( "main thread is now going to sleep" );
+
+				this.monitor.notify();
+
+				while ( this.running )
+				{
+					try
+					{
+						this.monitor.wait();
+					}
+					catch( final InterruptedException ignored )
+					{
+					}
+				}
+
+				AELog.craftingDebug( "main thread is now active" );
+			}
 		}
+
 		return true;
 	}