safe executor service creation

docs/src/progress/renderertodo.md

@@ -1796,6 +1796,7 @@ Support for freeing shaders
 Utilities to free all of a type of resource
 Slowdown entity tests to prevent VSCode from exploding when running tests
 Fix static state caching between tests in visual shader construction
+Safe executor service creation in non final static contexts
 
 
 

src/main/java/electrosphere/client/ui/menu/debug/render/ImGuiRenderer.java

@@ -39,6 +39,22 @@ public class ImGuiRenderer {
                     }
                     ImGui.unindent();
                 }
+                if(ImGui.collapsingHeader("Debug Toggles")){
+                    ImGui.indent();
+                    if(ImGui.button("Draw Client Hitboxes")){
+                        Globals.userSettings.setGraphicsDebugDrawCollisionSpheresClient(!Globals.userSettings.getGraphicsDebugDrawCollisionSpheresClient());
+                    }
+                    if(ImGui.button("Draw Server Hitboxes")){
+                        Globals.userSettings.setGraphicsDebugDrawCollisionSpheresServer(!Globals.userSettings.getGraphicsDebugDrawCollisionSpheresServer());
+                    }
+                    if(ImGui.button("Draw Physics Objects")){
+                        Globals.userSettings.setGraphicsDebugDrawPhysicsObjects(!Globals.userSettings.graphicsDebugDrawPhysicsObjects());
+                    }
+                    if(ImGui.button("Draw Grid Alignment Data")){
+                        Globals.userSettings.setGraphicsDebugDrawGridAlignment(!Globals.userSettings.getGraphicsDebugDrawGridAlignment());
+                    }
+                    ImGui.unindent();
+                }
                 if(ImGui.collapsingHeader("OpenGL Details")){
                     ImGui.text("GL_MAX_TEXTURE_IMAGE_UNITS: " + Globals.renderingEngine.getOpenGLContext().getMaxTextureImageUnits());
                     ImGui.text("GL_MAX_TEXTURE_SIZE: " + Globals.renderingEngine.getOpenGLContext().getMaxTextureSize());

src/main/java/electrosphere/engine/threads/ThreadManager.java

@@ -3,8 +3,10 @@ package electrosphere.engine.threads;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.concurrent.Semaphore;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.ReentrantLock;
 
 import electrosphere.client.terrain.foliage.FoliageModel;
 import electrosphere.engine.Globals;
@@ -13,7 +15,6 @@ import electrosphere.engine.threads.LabeledThread.ThreadLabel;
 import electrosphere.entity.types.terrain.BlockChunkEntity;
 import electrosphere.entity.types.terrain.TerrainChunk;
 import electrosphere.server.ai.services.PathfindingService;
-import electrosphere.server.datacell.gridded.GriddedDataCellLoaderService;
 import electrosphere.util.CodeUtils;
 
 /**
@@ -21,24 +22,37 @@ import electrosphere.util.CodeUtils;
  */
 public class ThreadManager {
     
-    //Threadsafes the manager
+    /**
-    Semaphore threadLock;
+     * Threadsafes the manager
+     */
+    private ReentrantLock threadLock;
 
-    //All threads that are actively running
+    /**
+     * All threads that are actively running
+     */
     private List<LabeledThread> activeThreads;
 
-    //All loading threads that are actively running
+    /**
+     * All loading threads that are actively running
+     */
     private List<LoadingThread> loadingThreads;
 
-    //Used by main thread to alert other threads whether they should keep running or not
+    /**
+     * Used by main thread to alert other threads whether they should keep running or not
+     */
     private boolean shouldKeepRunning;
 
+    /**
+     * Tracks all executors created
+     */
+    private static List<ExecutorService> executors = new LinkedList<ExecutorService>();
+
 
     /**
      * Initializes the thread manager
      */
     public void init(){
-        threadLock = new Semaphore(1);
+        threadLock = new ReentrantLock();
         activeThreads = new LinkedList<LabeledThread>();
         loadingThreads = new LinkedList<LoadingThread>();
         shouldKeepRunning = true;
@@ -48,7 +62,7 @@ public class ThreadManager {
      * Updates what threads are being tracked
      */
     public void update(){
-        threadLock.acquireUninterruptibly();
+        threadLock.lock();
         //
         //remove loading threads
         List<Thread> threadsToRemove = new LinkedList<Thread>();
@@ -61,7 +75,7 @@ public class ThreadManager {
             loadingThreads.remove(thread);
         }
 
-        threadLock.release();
+        threadLock.unlock();
     }
 
     /**
@@ -69,10 +83,10 @@ public class ThreadManager {
      * @param thread The thread to start
      */
     public void start(ThreadLabel label, Thread thread){
-        threadLock.acquireUninterruptibly();
+        threadLock.lock();
         activeThreads.add(new LabeledThread(label, thread));
         thread.start();
-        threadLock.release();
+        threadLock.unlock();
     }
 
     /**
@@ -80,11 +94,11 @@ public class ThreadManager {
      * @param thread The loading thread to start
      */
     public void start(LoadingThread thread){
-        threadLock.acquireUninterruptibly();
+        threadLock.lock();
         activeThreads.add(new LabeledThread(ThreadLabel.LOADING, thread));
         loadingThreads.add(thread);
         thread.start();
-        threadLock.release();
+        threadLock.unlock();
     }
 
     /**
@@ -108,7 +122,7 @@ public class ThreadManager {
      */
     public void close(){
         this.shouldKeepRunning = false;
-        threadLock.acquireUninterruptibly();
+        threadLock.lock();
 
         //for some reason, server must be explicitly closed
         if(Globals.server != null){
@@ -125,9 +139,15 @@ public class ThreadManager {
         TerrainChunk.haltThreads();
         FoliageModel.haltThreads();
         BlockChunkEntity.haltThreads();
-        GriddedDataCellLoaderService.haltThreads();
         PathfindingService.haltThreads();
 
+        /**
+         * Halt all requested executors
+         */
+        for(ExecutorService service : executors){
+            service.shutdownNow();
+        }
+
         //
         //interrupt all threads
         for(int i = 0; i < 3; i++){
@@ -150,7 +170,7 @@ public class ThreadManager {
                 CodeUtils.todo(e, "Handle failing to sleep while interrupting all other threads");
             }
         }
-        threadLock.release();
+        threadLock.unlock();
     }
 
     /**
@@ -166,7 +186,7 @@ public class ThreadManager {
      * @param label The label
      */
     public void interruptLabel(ThreadLabel label){
-        threadLock.acquireUninterruptibly();
+        threadLock.lock();
         //
         //interrupt threads
         for(LabeledThread thread : activeThreads){
@@ -174,7 +194,24 @@ public class ThreadManager {
                 thread.getThread().interrupt();
             }
         }
-        threadLock.release();
+        threadLock.unlock();
+    }
+
+    /**
+     * Requests a fixed-size thread pool
+     * @param threads The number of threads
+     * @return The executor
+     */
+    public ExecutorService requestFixedThreadPool(int threads){
+        if(threads < 1){
+            throw new Error("Requested invalid number of threads! " + threads);
+        }
+        ExecutorService rVal = null;
+        threadLock.lock();
+        rVal = Executors.newFixedThreadPool(threads);
+        executors.add(rVal);
+        threadLock.unlock();
+        return rVal;
     }
 
 }

src/main/java/electrosphere/server/datacell/gridded/GriddedDataCellLoaderService.java

@@ -4,7 +4,6 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.locks.ReentrantLock;
 
@@ -20,7 +19,7 @@ public class GriddedDataCellLoaderService {
     /**
      * Used for loading/unloading the cells
      */
-    protected static final ExecutorService ioThreadService = Executors.newFixedThreadPool(ThreadCounts.GRIDDED_DATACELL_LOADING_THREADS);
+    private ExecutorService ioThreadService = null;
 
     /**
      * Lock for structures in this service
@@ -37,13 +36,20 @@ public class GriddedDataCellLoaderService {
      */
     private static final Map<Long,Runnable> jobOperationMap = new HashMap<Long,Runnable>();
 
+    /**
+     * Constructor
+     */
+    public GriddedDataCellLoaderService(){
+        this.ioThreadService = Globals.threadManager.requestFixedThreadPool(ThreadCounts.GRIDDED_DATACELL_LOADING_THREADS);
+    }
+
     /**
      * Queues an operation that requires a read or write of a location's file data.
      * Guarantees that all operations will be run in order without losing any work.
      * @param key The key for the cell
      * @param operation The operation to perform
      */
-    protected static void queueLocationBasedOperation(long key, Runnable operation){
+    protected void queueLocationBasedOperation(long key, Runnable operation){
         lock.lock();
         //if there is a job queued and we couldn't cancel it, wait
         Future<?> job = queuedWorkLock.get(key);
@@ -96,7 +102,7 @@ public class GriddedDataCellLoaderService {
     /**
      * Halts the threads for the data cell loader service
      */
-    public static void haltThreads(){
+    public void haltThreads(){
         ioThreadService.shutdownNow();
     }
     

src/main/java/electrosphere/server/datacell/gridded/GriddedDataCellManager.java

@@ -9,7 +9,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.locks.ReentrantLock;
 
@@ -76,16 +75,21 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
      */
     static final double SIMULATION_DISTANCE_CUTOFF = 5;
 
-    /**
-     * Used for generating physics chunks
-     */
-    static final ExecutorService generationService = Executors.newFixedThreadPool(ThreadCounts.GRIDDED_DATACELL_PHYSICS_GEN_THREADS);
-
     /**
      * Big number used when scanning for a data cell to spawn a macro object within
      */
     static final double MACRO_SCANNING_BIG_NUMBER = 10000;
 
+    /**
+     * Used for generating physics chunks
+     */
+    ExecutorService generationService = null;
+
+    /**
+     * The service for loading data cells from disk
+     */
+    GriddedDataCellLoaderService loaderService;
+
     /**
      * Tracks whether this manager has been flagged to unload cells or not
      */
@@ -192,7 +196,7 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
             this.serverFluidManager == null ||
             this.serverContentManager == null
         ){
-            throw new IllegalStateException("Tried to create a GriddedDataCellManager with invalid parameters " +
+            throw new Error("Tried to create a GriddedDataCellManager with invalid parameters " +
                 this.parent + " " +
                 this.serverWorldData + " " +
                 this.serverTerrainManager + " " +
@@ -201,6 +205,8 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
             );
         }
         this.pathfinder = new VoxelPathfinder();
+        this.loaderService = new GriddedDataCellLoaderService();
+        this.generationService = Globals.threadManager.requestFixedThreadPool(ThreadCounts.GRIDDED_DATACELL_PHYSICS_GEN_THREADS);
     }
     
     /**
@@ -549,7 +555,7 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
                 //terrain is saved before tracking is removed. This makes sure that any side effects from calling savePositionToDisk (ie if it looks up the chunk that we're deleting)
                 //don't trigger the chunk to be re-created
                 Globals.profiler.beginCpuSample("GriddedDataCellManager.unloadPlayerlessChunks - Store data");
-                GriddedDataCellLoaderService.queueLocationBasedOperation(key, () -> {
+                this.loaderService.queueLocationBasedOperation(key, () -> {
                     serverContentManager.saveSerializationToDisk(key, serializedEntities);
                     serverTerrainManager.savePositionToDisk(worldPos);
                 });
@@ -768,7 +774,7 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
      * Because cell hasn't been registered yet, no simulation is performed until the physics is created.
      * @param worldPos
      */
-    private static void runPhysicsGenerationThread(
+    private void runPhysicsGenerationThread(
         Vector3i worldPos,
         Long key,
         PhysicsDataCell cell,
@@ -805,7 +811,7 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
             ServerEntityUtils.destroyEntity(blockEntity);
         }
 
-        generationService.submit(() -> {
+        this.generationService.submit(() -> {
             try {
                 BlockChunkData blockChunkData = realm.getServerWorldData().getServerBlockManager().getChunk(worldPos.x, worldPos.y, worldPos.z);
                 ServerTerrainChunk terrainChunk = realm.getServerWorldData().getServerTerrainManager().getChunk(worldPos.x, worldPos.y, worldPos.z, ServerChunkCache.STRIDE_FULL_RES);
@@ -861,7 +867,7 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
 
         Long key = this.getServerDataCellKey(localWorldPos);
         //generate content
-        GriddedDataCellLoaderService.queueLocationBasedOperation(key, () -> {
+        this.loaderService.queueLocationBasedOperation(key, () -> {
             try {
                 serverContentManager.generateContentForDataCell(parent, localWorldPos, rVal, cellKey);
             } catch(Error e){
@@ -873,7 +879,7 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
         //generates physics for the cell in a dedicated thread then finally registers
         loadedCellsLock.lock();
         PhysicsDataCell cell = posPhysicsMap.get(key);
-        GriddedDataCellManager.runPhysicsGenerationThread(localWorldPos,key,cell,this.posPhysicsMap,this.groundDataCells,this.cellTrackingMap,this.parent);
+        this.runPhysicsGenerationThread(localWorldPos,key,cell,this.posPhysicsMap,this.groundDataCells,this.cellTrackingMap,this.parent);
         loadedCellsLock.unlock();
 
 
@@ -1047,8 +1053,8 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
      * Stops the executor service
      */
     public void halt(){
-        generationService.shutdownNow();
+        this.generationService.shutdownNow();
-        GriddedDataCellLoaderService.ioThreadService.shutdownNow();
+        this.loaderService.haltThreads();
     }
 
     @Override