Fabric FB4A integration

Reviewed By: fkgozali

Differential Revision: D7953706

fbshipit-source-id: 406f8340eb3706dc07dcd32dcfaa5bdc06981aa1

ReactAndroid/src/androidTest/java/com/facebook/react/testing/ReactAppTestActivity.java

@@ -262,7 +262,7 @@ public class ReactAppTestActivity extends FragmentActivity
                       @Override
                       public FabricUIManager getJSIModule() {
                         List<ViewManager> viewManagers =
-                            getReactInstanceManager().getOrCreateViewManagers(reactApplicationContext);
+                          getReactInstanceManager().getOrCreateViewManagers(reactApplicationContext);
                         FabricUIManager fabricUIManager =
                             new FabricUIManager(
                                 reactApplicationContext, new ViewManagerRegistry(viewManagers));

ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManager.java

@@ -85,7 +85,6 @@ import com.facebook.react.views.imagehelper.ResourceDrawableIdHelper;
 import com.facebook.soloader.SoLoader;
 import com.facebook.systrace.Systrace;
 import com.facebook.systrace.SystraceMessage;
-
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;

ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManagerBuilder.java

@@ -281,6 +281,6 @@ public class ReactInstanceManagerBuilder {
         mDevBundleDownloadListener,
         mMinNumShakes,
         mMinTimeLeftInFrameForNonBatchedOperationMs,
-      mJSIModulesProvider);
+        mJSIModulesProvider);
   }
 }

ReactAndroid/src/main/java/com/facebook/react/bridge/JSIModuleRegistry.java

@@ -1,23 +1,37 @@
 package com.facebook.react.bridge;
 
+import com.facebook.infer.annotation.Assertions;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import com.facebook.infer.annotation.Assertions;
 
 public class JSIModuleRegistry {
 
+  private final List<JSIModuleHolder> mModuleList = new ArrayList<>();
   private final Map<Class, JSIModule> mModules = new HashMap<>();
+  private volatile boolean mIsInitialized = false;
 
   public JSIModuleRegistry() { }
 
   public <T extends JSIModule> T getModule(Class<T> moduleClass) {
+    JSIModule jsiModule = mModules.get(moduleClass);
+    if (jsiModule == null) {
+      initModules();
+    }
     return (T) Assertions.assertNotNull(mModules.get(moduleClass));
   }
 
   public void registerModules(List<JSIModuleHolder> jsiModules) {
-    for (JSIModuleHolder holder : jsiModules) {
+    mModuleList.addAll(jsiModules);
-      mModules.put(holder.getJSIModuleClass(), holder.getJSIModule());
+  }
+
+  public synchronized void initModules() {
+    if (!mIsInitialized) {
+      for (JSIModuleHolder holder : mModuleList) {
+        mModules.put(holder.getJSIModuleClass(), holder.getJSIModule());
+      }
+      mIsInitialized = true;
     }
   }
 }