Adds concurrent island leveling.

New config.yml entry. Can do concurrent checks up to amount admin
decides.
Fixes issue with reloading where the queue was not disabled and
continued to run.

pom.xml

@@ -65,7 +65,7 @@
         <!-- Do not change unless you want different name for local builds. -->
         <build.number>-LOCAL</build.number>
         <!-- This allows to change between versions. -->
-        <build.version>2.3.2</build.version>
+        <build.version>2.3.3</build.version>
     </properties>
 
     <!-- Profiles will allow to automatically change build version. -->

src/main/java/world/bentobox/level/Level.java

@@ -100,8 +100,33 @@ public class Level extends Addon implements Listener {
     @EventHandler
     public void onBentoBoxReady(BentoBoxReadyEvent e) {
         manager.loadTopTens();
+        /*
+         * DEBUG code to generate fake islands and then try to level them all.
+        Bukkit.getScheduler().runTaskLater(getPlugin(), () -> {
+            getPlugin().getAddonsManager().getGameModeAddons().stream()
+            .filter(gm -> !settings.getGameModes().contains(gm.getDescription().getName()))
+            .forEach(gm -> {
+                for (int i = 0; i < 1000; i++) {
+                    try {
+                        NewIsland.builder().addon(gm).player(User.getInstance(UUID.randomUUID())).name("default").reason(Reason.CREATE).noPaste().build();
+                    } catch (IOException e1) {
+                        // TODO Auto-generated catch block
+                        e1.printStackTrace();
+                    }
+                }
+            });
+            // Queue all islands DEBUG
+
+            getIslands().getIslands().stream().filter(Island::isOwned).forEach(is -> {
+
+                this.getManager().calculateLevel(is.getOwner(), is).thenAccept(r -> 
+                log("Result for island calc " + r.getLevel() + " at " + is.getCenter())); 
+
+            });
+       }, 60L);*/
     }
 
+
     private void registerPlaceholders(GameModeAddon gm) {
         if (getPlugin().getPlaceholdersManager() == null) return;
         // Island Level
@@ -172,6 +197,9 @@ public class Level extends Addon implements Listener {
 
     @Override
     public void onDisable() {
+        // Stop the pipeline
+        this.getPipeliner().stop();
+        // Save player data and the top tens
         if (manager != null) {
             manager.save();
         }

src/main/java/world/bentobox/level/LevelsManager.java

@@ -121,7 +121,6 @@ public class LevelsManager {
         addon.getPipeliner().addIsland(island).thenAccept(r -> {
             // Results are irrelevant because the island is unowned or deleted, or IslandLevelCalcEvent is cancelled
             if (r == null || fireIslandLevelCalcEvent(targetPlayer, island, r)) {
-                addon.logWarning("Island calcs stopped due to event cancelation");
                 result.complete(null);
             }
             // Save result

src/main/java/world/bentobox/level/calculators/Pipeliner.java

@@ -1,6 +1,8 @@
 package world.bentobox.level.calculators;
 
+import java.util.HashSet;
 import java.util.Queue;
+import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentLinkedQueue;
 
@@ -19,9 +21,9 @@ import world.bentobox.level.Level;
 public class Pipeliner {
 
     private static final int START_DURATION = 10; // 10 seconds
-    private final Queue<IslandLevelCalculator> processQueue;
+    private final Queue<IslandLevelCalculator> toProcessQueue;
+    private final Set<IslandLevelCalculator> inProcessQueue;
     private final BukkitTask task;
-    private boolean inProcess;
     private final Level addon;
     private long time;
     private long count;
@@ -31,25 +33,26 @@ public class Pipeliner {
      */
     public Pipeliner(Level addon) {
         this.addon = addon;
-        processQueue = new ConcurrentLinkedQueue<>();
+        toProcessQueue = new ConcurrentLinkedQueue<>();
+        inProcessQueue = new HashSet<>();
         // Loop continuously - check every tick if there is an island to scan
         task = Bukkit.getScheduler().runTaskTimer(BentoBox.getInstance(), () -> {
             if (!BentoBox.getInstance().isEnabled()) {
                 cancel();
                 return;
             }
-            // One island at a time
-            if (inProcess || processQueue.isEmpty()) return;
-
-            IslandLevelCalculator iD = processQueue.poll();
-            // Ignore deleted or unonwed islands
-            if (iD.getIsland().isDeleted() || iD.getIsland().isUnowned()) return;
-            // Start the process
-            inProcess = true;
-            // Start the scanning of a island with the first chunk
-            scanChunk(iD);
-
-        }, 1L, 1L);
+            // Complete the current to Process queue first
+            if (!inProcessQueue.isEmpty() || toProcessQueue.isEmpty()) return;
+            for (int j = 0; j < addon.getSettings().getConcurrentIslandCalcs() && !toProcessQueue.isEmpty(); j++) {
+                IslandLevelCalculator iD = toProcessQueue.poll();
+                // Ignore deleted or unonwed islands
+                if (!iD.getIsland().isDeleted() && !iD.getIsland().isUnowned()) {
+                    inProcessQueue.add(iD);
+                    // Start the scanning of a island with the first chunk
+                    scanChunk(iD);
+                }
+            }
+        }, 1L, 10L);
     }
 
     private void cancel() {
@@ -60,7 +63,7 @@ public class Pipeliner {
      * @return number of islands currently in the queue or in process
      */
     public int getIslandsInQueue() {
-        return inProcess ? processQueue.size() + 1 : processQueue.size();
+        return inProcessQueue.size() + toProcessQueue.size();
     }
 
     /**
@@ -68,10 +71,9 @@ public class Pipeliner {
      * @param iD
      */
     private void scanChunk(IslandLevelCalculator iD) {
-        if (iD.getIsland().isDeleted() || iD.getIsland().isUnowned()) {
+        if (iD.getIsland().isDeleted() || iD.getIsland().isUnowned() || task.isCancelled()) {
             // Island is deleted, so finish early with nothing
-            addon.log("Canceling island level calculation - island has been deleted, or has become unowned.");
-            inProcess = false;
+            inProcessQueue.remove(iD);
             iD.getR().complete(null);
             return;
         }
@@ -80,12 +82,12 @@ public class Pipeliner {
             if (!Bukkit.isPrimaryThread()) {
                 addon.getPlugin().logError("scanChunk not on Primary Thread!");
             }
-            if (Boolean.TRUE.equals(r)) {
+            if (Boolean.TRUE.equals(r) || task.isCancelled()) {
                 // scanNextChunk returns true if there are more chunks to scan
                 scanChunk(iD);
             } else {
                 // Done
-                inProcess = false;
+                inProcessQueue.remove(iD);
                 iD.getR().complete(iD.getResults());
             }
         });
@@ -100,7 +102,12 @@ public class Pipeliner {
      */
     public CompletableFuture<Results> addIsland(Island island) {
         CompletableFuture<Results> r = new CompletableFuture<>();
-        processQueue.add(new IslandLevelCalculator(addon, island, r));
+        // Check if queue already contains island
+        /*
+        if (processQueue.parallelStream().map(IslandLevelCalculator::getIsland).anyMatch(island::equals)) {
+            return CompletableFuture.completedFuture(null);
+        }*/
+        toProcessQueue.add(new IslandLevelCalculator(addon, island, r));
         count++;
         return r;
     }
@@ -122,5 +129,15 @@ public class Pipeliner {
         this.time += time;
     }
 
+    /**
+     * Stop the current queue.
+     */
+    public void stop() {
+        addon.log("Stopping Level queue");
+        task.cancel();
+        this.inProcessQueue.clear();
+        this.toProcessQueue.clear(); 
+    }
+
 
 }

src/main/java/world/bentobox/level/config/ConfigSettings.java

@@ -18,6 +18,12 @@ public class ConfigSettings implements ConfigObject {
     @ConfigComment("Level will NOT hook into these game mode addons.")
     @ConfigEntry(path = "disabled-game-modes")
     private List<String> gameModes = Collections.emptyList();
+    
+    @ConfigComment("")
+    @ConfigComment("Number of concurrent island calculations")
+    @ConfigComment("If your CPU can handle it, you can run parallel island calcs if there are more than one in the queue")
+    @ConfigEntry(path = "concurrent-island-calcs")
+    private int concurrentIslandCalcs = 1;
 
     @ConfigComment("")
     @ConfigComment("Calculate island level on login")
@@ -292,6 +298,24 @@ public class ConfigSettings implements ConfigObject {
     }
 
 
+    /**
+     * @return the concurrentIslandCalcs
+     */
+    public int getConcurrentIslandCalcs() {
+        if (concurrentIslandCalcs < 1) concurrentIslandCalcs = 1;
+        return concurrentIslandCalcs;
+    }
+
+
+    /**
+     * @param concurrentIslandCalcs the concurrentIslandCalcs to set
+     */
+    public void setConcurrentIslandCalcs(int concurrentIslandCalcs) {
+        if (concurrentIslandCalcs < 1) concurrentIslandCalcs = 1;
+        this.concurrentIslandCalcs = concurrentIslandCalcs;
+    }
+
+
 
 
 

src/main/resources/config.yml

@@ -5,6 +5,10 @@
 # Level will NOT hook into these game mode addons.
 disabled-game-modes:
 - AOneBlock
+#
+# Number of concurrent island calculations
+# If your CPU can handle it, you can run parallel island calcs if there are more than one in the queue
+concurrent-island-calcs: 1
 # 
 # Calculate island level on login
 # This silently calculates the player's island level when they login