Clean up the resources generated by HCR provider

.vscode/launch.json

@@ -14,7 +14,8 @@
       "sourcePaths": [
         "${workspaceRoot}/com.microsoft.java.debug.core/main/java",
         "${workspaceRoot}/com.microsoft.java.debug.plugin/src/main/java"
-      ]
+      ],
+      "projectName": "com.microsoft.java.debug.plugin"
     }
   ]
 }

com.microsoft.java.debug.core/src/main/java/com/microsoft/java/debug/core/adapter/IProvider.java

@@ -24,4 +24,10 @@ public interface IProvider {
      */
     default void initialize(IDebugAdapterContext debugContext, Map<String, Object> options) {
     }
+
+    /**
+     * Close the provider and free all associated resources.
+     */
+    default void close() {
+    }
 }

com.microsoft.java.debug.core/src/main/java/com/microsoft/java/debug/core/adapter/handler/AbstractDisconnectRequestHandler.java

@@ -23,6 +23,7 @@
 import com.microsoft.java.debug.core.Configuration;
 import com.microsoft.java.debug.core.adapter.IDebugAdapterContext;
 import com.microsoft.java.debug.core.adapter.IDebugRequestHandler;
+import com.microsoft.java.debug.core.adapter.IHotCodeReplaceProvider;
 import com.microsoft.java.debug.core.adapter.LaunchMode;
 import com.microsoft.java.debug.core.protocol.Messages.Response;
 import com.microsoft.java.debug.core.protocol.Requests.Arguments;
@@ -50,6 +51,7 @@ public CompletableFuture<Response> handle(Command command, Arguments arguments,
      * @param context the debug context
      */
     private void destroyResource(IDebugAdapterContext context) {
+        destroyProviders(context);
         if (shouldDestroyLaunchFiles(context)) {
             destroyLaunchFiles(context);
         }
@@ -97,4 +99,11 @@ private void destroyLaunchFiles(IDebugAdapterContext context) {
     }
 
     protected abstract void destroyDebugSession(Command command, Arguments arguments, Response response, IDebugAdapterContext context);
+
+    protected void destroyProviders(IDebugAdapterContext context) {
+        IHotCodeReplaceProvider hcrProvider = context.getProvider(IHotCodeReplaceProvider.class);
+        if (hcrProvider != null) {
+            hcrProvider.close();
+        }
+    }
 }

com.microsoft.java.debug.core/src/main/java/com/microsoft/java/debug/core/adapter/handler/DisconnectRequestHandler.java

@@ -32,5 +32,4 @@ public void destroyDebugSession(Command command, Arguments arguments, Response r
             }
         }
     }
-
 }

com.microsoft.java.debug.plugin/src/main/java/com/microsoft/java/debug/plugin/internal/JavaHotCodeReplaceProvider.java

@@ -265,8 +265,16 @@ public void initialize(IDebugAdapterContext context, Map<String, Object> options
         }
         this.context = context;
         currentDebugSession = context.getDebugSession();
+    }
+
+    @Override
+    public void close() {
+        if (DebugSettings.getCurrent().hotCodeReplace != DebugSettings.HotCodeReplace.NEVER) {
+            // Remove the listener.
+            ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);
+        }
 
-        // TODO: Change IProvider interface for shutdown event
+        eventSubject.onComplete();
     }
 
     @Override