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Add support for throttling chunk load rate, spreading over ticks

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This commit is contained in:
Mike Primm 2011-06-18 19:43:47 -05:00
parent 8b35f4d3b7
commit 2bc9b410a6
8 changed files with 188 additions and 102 deletions
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98
src/main/java/org/dynmap/MapManager.java
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@ -9,10 +9,10 @@ import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.scheduler.BukkitScheduler;
@ -25,13 +25,18 @@ import org.dynmap.utils.NewMapChunkCache;
public class MapManager {
public AsynchronousQueue<MapTile> tileQueue;
private static final int DEFAULT_CHUNKS_PER_TICK = 200;
public List<DynmapWorld> worlds = new ArrayList<DynmapWorld>();
public Map<String, DynmapWorld> worldsLookup = new HashMap<String, DynmapWorld>();
private BukkitScheduler scheduler;
private DynmapPlugin plug_in;
private long timeslice_int = 0; /* In milliseconds */
private int max_chunk_loads_per_tick = DEFAULT_CHUNKS_PER_TICK;
/* Which fullrenders are active */
private HashMap<String, FullWorldRenderState> active_renders = new HashMap<String, FullWorldRenderState>();
/* List of MapChunkCache requests to be processed */
private ConcurrentLinkedQueue<MapChunkCache> chunkloads = new ConcurrentLinkedQueue<MapChunkCache>();
/* Tile hash manager */
public TileHashManager hashman;
/* lock for our data structures */
@ -60,10 +65,22 @@ public class MapManager {
public Collection<DynmapWorld> getWorlds() {
return worlds;
}
private static class OurThreadFactory implements ThreadFactory {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r);
t.setDaemon(true);
t.setPriority(Thread.MIN_PRIORITY);
t.setName("Dynmap Render Thread");
return t;
}
}
private class DynmapScheduledThreadPoolExecutor extends ScheduledThreadPoolExecutor {
DynmapScheduledThreadPoolExecutor() {
super(POOL_SIZE);
this.setThreadFactory(new OurThreadFactory());
}
protected void afterExecute(Runnable r, Throwable x) {
@ -163,7 +180,7 @@ public class MapManager {
}
World w = world.world;
/* Fetch chunk cache from server thread */
DynmapChunk[] requiredChunks = tile.getMap().getRequiredChunks(tile);
List<DynmapChunk> requiredChunks = tile.getMap().getRequiredChunks(tile);
MapChunkCache cache = createMapChunkCache(world, requiredChunks);
if(cache == null) {
cleanup();
@ -222,6 +239,25 @@ public class MapManager {
}
}
private class ProcessChunkLoads implements Runnable {
public void run() {
int cnt = max_chunk_loads_per_tick;
while(cnt > 0) {
MapChunkCache c = chunkloads.peek();
if(c == null)
return;
cnt = cnt - c.loadChunks(cnt);
if(c.isDoneLoading()) {
chunkloads.poll();
synchronized(c) {
c.notify();
}
}
}
}
}
public MapManager(DynmapPlugin plugin, ConfigurationNode configuration) {
plug_in = plugin;
mapman = this;
@ -235,7 +271,8 @@ public class MapManager {
/* On dedicated thread, so default to no delays */
timeslice_int = (long)(configuration.getDouble("timesliceinterval", 0.0) * 1000);
max_chunk_loads_per_tick = configuration.getInteger("maxchunkspertick", DEFAULT_CHUNKS_PER_TICK);
if(max_chunk_loads_per_tick < 5) max_chunk_loads_per_tick = 5;
scheduler = plugin.getServer().getScheduler();
hashman = new TileHashManager(DynmapPlugin.tilesDirectory, configuration.getBoolean("enabletilehash", true));
@ -247,7 +284,7 @@ public class MapManager {
}
scheduler.scheduleSyncRepeatingTask(plugin, new CheckWorldTimes(), 5*20, 5*20); /* Check very 5 seconds */
scheduler.scheduleSyncRepeatingTask(plugin, new ProcessChunkLoads(), 1, 1); /* Chunk loader task */
}
void renderFullWorld(Location l, CommandSender sender) {
@ -439,35 +476,32 @@ public class MapManager {
/**
* Render processor helper - used by code running on render threads to request chunk snapshot cache from server/sync thread
*/
public MapChunkCache createMapChunkCache(final DynmapWorld w, final DynmapChunk[] chunks) {
Callable<MapChunkCache> job = new Callable<MapChunkCache>() {
public MapChunkCache call() {
MapChunkCache c = null;
try {
if(!use_legacy)
c = new NewMapChunkCache();
} catch (NoClassDefFoundError ncdfe) {
use_legacy = true;
}
if(c == null)
c = new LegacyMapChunkCache();
if(w.visibility_limits != null) {
for(MapChunkCache.VisibilityLimit limit: w.visibility_limits) {
c.setVisibleRange(limit);
}
c.setHiddenFillStyle(w.hiddenchunkstyle);
}
c.loadChunks(w.world, chunks);
return c;
}
};
Future<MapChunkCache> rslt = scheduler.callSyncMethod(plug_in, job);
public MapChunkCache createMapChunkCache(final DynmapWorld w, final List<DynmapChunk> chunks) {
MapChunkCache c = null;
try {
return rslt.get();
} catch (Exception x) {
Log.info("createMapChunk - " + x);
return null;
if(!use_legacy)
c = new NewMapChunkCache();
} catch (NoClassDefFoundError ncdfe) {
use_legacy = true;
}
if(c == null)
c = new LegacyMapChunkCache();
if(w.visibility_limits != null) {
for(MapChunkCache.VisibilityLimit limit: w.visibility_limits) {
c.setVisibleRange(limit);
}
c.setHiddenFillStyle(w.hiddenchunkstyle);
}
c.setChunks(w.world, chunks);
synchronized(c) {
chunkloads.add(c);
try {
c.wait();
} catch (InterruptedException ix) {
return null;
}
}
return c;
}
/**
* Update map tile statistics