First implementation for plugin synchronization

event-loop/src/main/java/mc/core/events/EventPipelineTask.java

@@ -9,12 +9,14 @@ import mc.core.events.runner.EventExecutorService;
 import mc.core.events.runner.ResourceRunnable;
 
 import java.lang.reflect.InvocationTargetException;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.locks.Lock;
 
 @RequiredArgsConstructor
 @Getter
 @Slf4j
-public class EventPipeline {
+public class EventPipelineTask {
     private final List<RegisteredEventHandler> handlers;
     private final FullAsyncEventLoop manager;
     private final Event event;
@@ -39,6 +41,11 @@ public class EventPipeline {
 
         RegisteredEventHandler handler = handlers.get(currentIndex);
         if (!event.isCanceled() || !handler.isIgnoreCancelled()) {
+            List<Lock> locks = new ArrayList<>();
+
+            if (handler.isPluginSynchronize())
+                locks.add(manager.getResourceManager().getPluginLock(handler.getPlugin()));
+
             service.addTask(new ResourceRunnable() {
                 @Override
                 public void run() {
@@ -54,6 +61,11 @@ public class EventPipeline {
                     currentIndex++;
                     next(service);
                 }
+
+                @Override
+                public List<Lock> getLocks() {
+                    return locks;
+                }
             });
         } else {
             currentIndex++;

event-loop/src/main/java/mc/core/events/FullAsyncEventLoop.java

@@ -17,10 +17,11 @@ import java.util.concurrent.ConcurrentHashMap;
 public class FullAsyncEventLoop {
     Map<Class<? extends Event>, List<RegisteredEventHandler>> handlers = new HashMap<>();
     // Item leaves this queue only when EventPipeline is fully executed
-    private Map<EventQueueOwner, Queue<EventPipeline>> eventQueue = new ConcurrentHashMap<>();
+    private Map<EventQueueOwner, Queue<EventPipelineTask>> eventQueue = new ConcurrentHashMap<>();
     @Autowired
     @Setter
     private EventExecutorService eventExecutorService;
+    private SharedResourceManager resourceManager = new SharedResourceManager();
 
     public void addEventHandler(Plugin plugin, Object object) {
         Map<Method, EventHandler> candidates = getEventHandlerCandidates(object);
@@ -73,8 +74,8 @@ public class FullAsyncEventLoop {
         if (handlers == null)
             return;
 
-        Queue<EventPipeline> queue = eventQueue.computeIfAbsent(owner, s -> new ArrayDeque<>());
-        queue.add(new EventPipeline(handlers, this, event, owner));
+        Queue<EventPipelineTask> queue = eventQueue.computeIfAbsent(owner, s -> new ArrayDeque<>());
+        queue.add(new EventPipelineTask(handlers, this, event, owner));
         update(owner);
     }
 
@@ -91,22 +92,24 @@ public class FullAsyncEventLoop {
             log.warn("Unable to update pipeline executor: unable to find queue");
             return;
         }
-        Queue<EventPipeline> queue = eventQueue.get(owner);
+        Queue<EventPipelineTask> queue = eventQueue.get(owner);
         if (queue.isEmpty()) {
             log.warn("Unable to update pipeline executor: queue is empty");
             return;
         }
 
-        if (queue.peek().getState() == EventPipeline.PipelineState.FINISHED) {
+        if (queue.peek().getState() == EventPipelineTask.PipelineState.FINISHED) {
             queue.poll();
         }
 
-        EventPipeline pipeline;
+        EventPipelineTask pipeline;
         if ((pipeline = queue.peek()) != null
-                && pipeline.getState() == EventPipeline.PipelineState.IDLE) {
+                && pipeline.getState() == EventPipelineTask.PipelineState.IDLE) {
             pipeline.next(eventExecutorService);
         }
     }
 
-
+    public SharedResourceManager getResourceManager() {
+        return resourceManager;
+    }
 }

event-loop/src/main/java/mc/core/events/SharedResourceManager.java

@@ -0,0 +1,17 @@
+package mc.core.events;
+
+import mc.core.events.api.Plugin;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+public class SharedResourceManager {
+    private Map<Plugin, Lock> pluginLocks = new ConcurrentHashMap<>();
+
+    public Lock getPluginLock(Plugin plugin) {
+        return pluginLocks.computeIfAbsent(plugin, s -> new ReentrantLock());
+    }
+
+}