Improve init and runtime performance of native modules

ReactAndroid/build.gradle

@@ -277,6 +277,7 @@ android {
 }
 
 dependencies {
+    annotationProcessor project(':processor');
     compile fileTree(dir: 'src/main/third-party/java/infer-annotations/', include: ['*.jar'])
     compile 'javax.inject:javax.inject:1'
     compile 'com.android.support:appcompat-v7:23.0.1'

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

@@ -0,0 +1,92 @@
+package com.facebook.react.bridge;
+
+import java.util.List;
+import com.facebook.common.logging.FLog;
+
+/**
+ * Accelerated version of JavaModuleWrapper
+ * Created by ransj on 2017/8/7.
+ */
+
+public final class AcJavaModuleWrapper extends JavaModuleWrapper {
+
+  private static ModuleProvider mCoreModuleProvider;
+  private static ModuleProvider mCustomModuleProvider;
+  private final ModuleHelper mModuleHelper;
+
+  static {
+    String clsName = JavaModuleWrapper.class.getName();
+    try {
+      // CoreModuleProvider generated by ReactNativeModuleProcessor.java,
+      // aim to provide ModuleHelper for official native modules
+      Class<?> coreHelperCls = Class.forName(clsName + "$CoreModuleProvider");
+      //noinspection unchecked
+      mCoreModuleProvider = (ModuleProvider) coreHelperCls.newInstance();
+    } catch (ClassNotFoundException e) {
+      FLog.w("JavaModuleHelper", "Could not find generated core module provider");
+    } catch (InstantiationException e) {
+      throw new RuntimeException("Unable to instantiate core module provider ", e);
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException("Unable to instantiate core module provider ", e);
+    }
+    try {
+      // CustomModuleProvider generated by ReactNativeModuleProcessor.java,
+      // aim to provide ModuleHelper for third-party native modules
+      Class<?> customHelperCls = Class.forName(clsName + "$CustomModuleProvider");
+      //noinspection unchecked
+      mCustomModuleProvider = (ModuleProvider) customHelperCls.newInstance();
+    } catch (ClassNotFoundException e) {
+      FLog.w("JavaModuleHelper", "Could not find generated custom module provider");
+    } catch (InstantiationException e) {
+      throw new RuntimeException("Unable to instantiate custom module provider ", e);
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException("Unable to instantiate custom module provider ", e);
+    }
+  }
+
+  public AcJavaModuleWrapper(JSInstance jsInstance, Class<? extends NativeModule> moduleClass, ModuleHolder moduleHolder) {
+    super(jsInstance, moduleClass, moduleHolder);
+    ModuleHelper helper = null;
+    if (helper == null && mCustomModuleProvider != null) {
+      helper = mCustomModuleProvider.getModuleHelper(getModule());
+    }
+    if (mCoreModuleProvider != null) {
+      helper = mCoreModuleProvider.getModuleHelper(getModule());
+    }
+    mModuleHelper = helper;
+  }
+
+  @Override
+  public List<MethodDescriptor> getMethodDescriptors() {
+    return mModuleHelper == null ? super.getMethodDescriptors() : mModuleHelper.getMethodDescriptors();
+  }
+
+  @Override
+  public void invoke(int methodId, ReadableNativeArray parameters) {
+    if (mModuleHelper == null) {
+      super.invoke(methodId, parameters);
+    } else {
+      mModuleHelper.invoke(mJSInstance, methodId, parameters);
+    }
+  }
+
+  public interface ModuleHelper {
+
+    /**
+     * @return
+     */
+    List<MethodDescriptor> getMethodDescriptors();
+
+    /**
+     * @param jsInstance
+     * @param methodId
+     * @param parameters
+     */
+    void invoke(JSInstance jsInstance, int methodId, ReadableNativeArray parameters);
+  }
+
+  interface ModuleProvider {
+    ModuleHelper getModuleHelper(BaseJavaModule module);
+  }
+
+}

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

@@ -37,19 +37,8 @@
 
 @DoNotStrip
 public class JavaModuleWrapper {
-  @DoNotStrip
-  public class MethodDescriptor {
-    @DoNotStrip
-    Method method;
-    @DoNotStrip
-    String signature;
-    @DoNotStrip
-    String name;
-    @DoNotStrip
-    String type;
-  }
 
-  private final JSInstance mJSInstance;
+  protected final JSInstance mJSInstance;
   private final ModuleHolder mModuleHolder;
   private final Class<? extends NativeModule> mModuleClass;
   private final ArrayList<NativeModule.NativeMethod> mMethods;

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

@@ -0,0 +1,21 @@
+package com.facebook.react.bridge;
+
+import com.facebook.proguard.annotations.DoNotStrip;
+
+import java.lang.reflect.Method;
+
+/**
+ * Created by ransj on 2017/8/14.
+ */
+
+@DoNotStrip
+public class MethodDescriptor {
+  @DoNotStrip
+  Method method;
+  @DoNotStrip
+  String signature;
+  @DoNotStrip
+  String name;
+  @DoNotStrip
+  String type;
+}

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

@@ -57,7 +57,7 @@ private ArrayList<ModuleHolder> getBatchCompleteListenerModules() {
     for (Map.Entry<Class<? extends NativeModule>, ModuleHolder> entry : mModules.entrySet()) {
       Class<? extends NativeModule> type = entry.getKey();
       if (!CxxModuleWrapperBase.class.isAssignableFrom(type)) {
-        javaModules.add(new JavaModuleWrapper(jsInstance, type, entry.getValue()));
+        javaModules.add(new AcJavaModuleWrapper(jsInstance, type, entry.getValue()));
       }
     }
     return javaModules;