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Reducing CPU usage as a result of unloading chunks.

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This commit is contained in:
Glitchfinder 2013-01-13 20:02:11 -08:00
parent f73d0dbc40
commit d5d6f7e860
2 changed files with 44 additions and 15 deletions
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17
src/main/java/com/gmail/nossr50/datatypes/InactiveChunk.java Executable file
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@ -0,0 +1,17 @@
package com.gmail.nossr50.datatypes;
import org.bukkit.Chunk;
public class InactiveChunk {
public Chunk chunk;
public int inactiveTime = 0;
public InactiveChunk(Chunk chunk, int inactiveTime) {
this.chunk = chunk;
this.inactiveTime = inactiveTime;
}
public InactiveChunk(Chunk chunk) {
this(chunk, 0);
}
}

42
src/main/java/com/gmail/nossr50/runnables/ChunkletUnloader.java
View File

@ -8,23 +8,24 @@ import java.util.Map.Entry;
import org.bukkit.Chunk;
import org.bukkit.World;
import com.gmail.nossr50.datatypes.InactiveChunk;
import com.gmail.nossr50.mcMMO;
public class ChunkletUnloader implements Runnable {
private static Map<Chunk, Integer> unloadedChunks = new HashMap<Chunk, Integer>();
private static Map<String, InactiveChunk> unloadedChunks = new HashMap<String, InactiveChunk>();
private static int minimumInactiveTime = 60; //Should be a multiple of RUN_INTERVAL for best performance
public static final int RUN_INTERVAL = 20;
public static void addToList(Chunk chunk) {
//Unfortunately we can't use Map.contains() because Chunks are always new objects
//This method isn't efficient enough for me
for (Chunk otherChunk : unloadedChunks.keySet()) {
if (chunk.getX() == otherChunk.getX() && chunk.getZ() == otherChunk.getZ()) {
return;
}
}
if (chunk == null || chunk.getWorld() == null)
return;
unloadedChunks.put(chunk, 0);
String key = chunk.getWorld().getName() + "," + chunk.getX() + "," + chunk.getZ();
if (unloadedChunks.containsKey(key))
return;
unloadedChunks.put(key, new InactiveChunk(chunk));
}
public static void addToList(int cx, int cz, World world) {
@ -33,24 +34,35 @@ public class ChunkletUnloader implements Runnable {
@Override
public void run() {
for (Iterator<Entry<Chunk, Integer>> unloadedChunkIterator = unloadedChunks.entrySet().iterator() ; unloadedChunkIterator.hasNext() ; ) {
Entry<Chunk, Integer> entry = unloadedChunkIterator.next();
Chunk chunk = entry.getKey();
for (Iterator<Entry<String, InactiveChunk>> unloadedChunkIterator = unloadedChunks.entrySet().iterator() ; unloadedChunkIterator.hasNext() ; ) {
Entry<String, InactiveChunk> entry = unloadedChunkIterator.next();
if (entry.getKey() == null || entry.getValue() == null) {
unloadedChunkIterator.remove();
continue;
}
if (entry.getValue().chunk == null) {
unloadedChunkIterator.remove();
continue;
}
Chunk chunk = entry.getValue().chunk;
if (!chunk.isLoaded()) {
int inactiveTime = entry.getValue() + RUN_INTERVAL;
int inactiveTime = entry.getValue().inactiveTime + RUN_INTERVAL;
//Chunklets are unloaded only if their chunk has been unloaded for minimumInactiveTime
if (inactiveTime >= minimumInactiveTime) {
if (mcMMO.placeStore == null)
continue;
return;
mcMMO.placeStore.unloadChunk(chunk.getX(), chunk.getZ(), chunk.getWorld());
unloadedChunkIterator.remove();
continue;
}
unloadedChunks.put(entry.getKey(), inactiveTime);
entry.getValue().inactiveTime = inactiveTime;
}
else {
//Just remove the entry if the chunk has been reloaded.