Remove "Reload on JS change" from RN Android

Summary: This feature is not necessary any longer with Fast Refresh enabled by default.

Reviewed By: gaearon

Differential Revision: D17156607

fbshipit-source-id: 2396a86d192c6b5d90cbed9cefbf13367dd6b699

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevInternalSettings.java

@@ -27,9 +27,6 @@
   private static final String PREFS_JS_DEV_MODE_DEBUG_KEY = "js_dev_mode_debug";
   private static final String PREFS_JS_MINIFY_DEBUG_KEY = "js_minify_debug";
   private static final String PREFS_ANIMATIONS_DEBUG_KEY = "animations_debug";
-  // This option is no longer exposed in the dev menu UI.
-  // It was renamed in D15958697 so it doesn't get stuck with no way to turn it off:
-  private static final String PREFS_RELOAD_ON_JS_CHANGE_KEY = "reload_on_js_change_LEGACY";
   private static final String PREFS_INSPECTOR_DEBUG_KEY = "inspector_debug";
   private static final String PREFS_HOT_MODULE_REPLACEMENT_KEY = "hot_module_replacement";
   private static final String PREFS_REMOTE_JS_DEBUG_KEY = "remote_js_debug";
@@ -82,7 +79,6 @@ public boolean isJSMinifyEnabled() {
   public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
     if (mListener != null) {
       if (PREFS_FPS_DEBUG_KEY.equals(key)
-          || PREFS_RELOAD_ON_JS_CHANGE_KEY.equals(key)
           || PREFS_JS_DEV_MODE_DEBUG_KEY.equals(key)
           || PREFS_START_SAMPLING_PROFILER_ON_INIT.equals(key)
           || PREFS_JS_MINIFY_DEBUG_KEY.equals(key)) {
@@ -99,14 +95,6 @@ public void setHotModuleReplacementEnabled(boolean enabled) {
     mPreferences.edit().putBoolean(PREFS_HOT_MODULE_REPLACEMENT_KEY, enabled).apply();
   }
 
-  public boolean isReloadOnJSChangeEnabled() {
-    return mPreferences.getBoolean(PREFS_RELOAD_ON_JS_CHANGE_KEY, false);
-  }
-
-  public void setReloadOnJSChangeEnabled(boolean enabled) {
-    mPreferences.edit().putBoolean(PREFS_RELOAD_ON_JS_CHANGE_KEY, enabled).apply();
-  }
-
   public boolean isElementInspectorEnabled() {
     return mPreferences.getBoolean(PREFS_INSPECTOR_DEBUG_KEY, false);
   }

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevServerHelper.java

@@ -8,16 +8,12 @@
 
 import android.content.Context;
 import android.os.AsyncTask;
-import android.os.Handler;
-import android.os.Looper;
 import android.widget.Toast;
 import androidx.annotation.Nullable;
 import com.facebook.common.logging.FLog;
 import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.R;
-import com.facebook.react.bridge.UiThreadUtil;
 import com.facebook.react.common.ReactConstants;
-import com.facebook.react.common.network.OkHttpCallUtil;
 import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.devsupport.interfaces.PackagerStatusCallback;
 import com.facebook.react.devsupport.interfaces.StackFrame;
@@ -38,7 +34,6 @@
 import java.util.concurrent.TimeUnit;
 import okhttp3.Call;
 import okhttp3.Callback;
-import okhttp3.ConnectionPool;
 import okhttp3.MediaType;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
@@ -68,8 +63,6 @@ public class DevServerHelper {
 
   private static final String PACKAGER_OK_STATUS = "packager-status:running";
 
-  private static final int LONG_POLL_KEEP_ALIVE_DURATION_MS = 2 * 60 * 1000; // 2 mins
-  private static final int LONG_POLL_FAILURE_DELAY_MS = 5000;
   private static final int HTTP_CONNECT_TIMEOUT_MS = 5000;
 
   private static final String DEBUGGER_MSG_DISABLE = "{ \"id\":1,\"method\":\"Debugger.disable\" }";
@@ -117,15 +110,11 @@ public String typeID() {
 
   private final DevInternalSettings mSettings;
   private final OkHttpClient mClient;
-  private final Handler mRestartOnChangePollingHandler;
   private final BundleDownloader mBundleDownloader;
   private final String mPackageName;
 
-  private boolean mOnChangePollingEnabled;
   private @Nullable JSPackagerClient mPackagerClient;
   private @Nullable InspectorPackagerConnection mInspectorPackagerConnection;
-  private @Nullable OkHttpClient mOnChangePollingClient;
-  private @Nullable OnServerContentChangeListener mOnServerContentChangeListener;
   private InspectorPackagerConnection.BundleStatusProvider mBundlerStatusProvider;
 
   public DevServerHelper(
@@ -142,7 +131,6 @@ public DevServerHelper(
             .build();
     mBundleDownloader = new BundleDownloader(mClient);
 
-    mRestartOnChangePollingHandler = new Handler(Looper.getMainLooper());
     mPackageName = packageName;
   }
 
@@ -524,90 +512,6 @@ private static String createPackagerStatusURL(String host) {
     return String.format(Locale.US, "http://%s/status", host);
   }
 
-  public void stopPollingOnChangeEndpoint() {
-    mOnChangePollingEnabled = false;
-    mRestartOnChangePollingHandler.removeCallbacksAndMessages(null);
-    if (mOnChangePollingClient != null) {
-      OkHttpCallUtil.cancelTag(mOnChangePollingClient, this);
-      mOnChangePollingClient = null;
-    }
-    mOnServerContentChangeListener = null;
-  }
-
-  public void startPollingOnChangeEndpoint(
-      OnServerContentChangeListener onServerContentChangeListener) {
-    if (mOnChangePollingEnabled) {
-      // polling already enabled
-      return;
-    }
-    mOnChangePollingEnabled = true;
-    mOnServerContentChangeListener = onServerContentChangeListener;
-    mOnChangePollingClient =
-        new OkHttpClient.Builder()
-            .connectionPool(
-                new ConnectionPool(1, LONG_POLL_KEEP_ALIVE_DURATION_MS, TimeUnit.MILLISECONDS))
-            .connectTimeout(HTTP_CONNECT_TIMEOUT_MS, TimeUnit.MILLISECONDS)
-            .build();
-    enqueueOnChangeEndpointLongPolling();
-  }
-
-  private void handleOnChangePollingResponse(boolean didServerContentChanged) {
-    if (mOnChangePollingEnabled) {
-      if (didServerContentChanged) {
-        UiThreadUtil.runOnUiThread(
-            new Runnable() {
-              @Override
-              public void run() {
-                if (mOnServerContentChangeListener != null) {
-                  mOnServerContentChangeListener.onServerContentChanged();
-                }
-              }
-            });
-      }
-      enqueueOnChangeEndpointLongPolling();
-    }
-  }
-
-  private void enqueueOnChangeEndpointLongPolling() {
-    Request request = new Request.Builder().url(createOnChangeEndpointUrl()).tag(this).build();
-    Assertions.assertNotNull(mOnChangePollingClient)
-        .newCall(request)
-        .enqueue(
-            new Callback() {
-              @Override
-              public void onFailure(Call call, IOException e) {
-                if (mOnChangePollingEnabled) {
-                  // this runnable is used by onchange endpoint poller to delay subsequent requests
-                  // in case
-                  // of a failure, so that we don't flood network queue with frequent requests in
-                  // case when
-                  // dev server is down
-                  FLog.d(ReactConstants.TAG, "Error while requesting /onchange endpoint", e);
-                  mRestartOnChangePollingHandler.postDelayed(
-                      new Runnable() {
-                        @Override
-                        public void run() {
-                          handleOnChangePollingResponse(false);
-                        }
-                      },
-                      LONG_POLL_FAILURE_DELAY_MS);
-                }
-              }
-
-              @Override
-              public void onResponse(Call call, Response response) throws IOException {
-                handleOnChangePollingResponse(response.code() == 205);
-              }
-            });
-  }
-
-  private String createOnChangeEndpointUrl() {
-    return String.format(
-        Locale.US,
-        "http://%s/onchange",
-        mSettings.getPackagerConnectionSettings().getDebugServerHost());
-  }
-
   private String createLaunchJSDevtoolsCommandUrl() {
     return String.format(
         Locale.US,

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSupportManagerImpl.java

@@ -517,9 +517,7 @@ public void onOptionSelected() {
             mReactInstanceManagerHelper.toggleElementInspector();
           }
         });
-    // "Live reload" which refreshes on every edit was removed in favor of "Fast Refresh".
-    // While native code for "Live reload" is still there, please don't add the option back.
-    // See D15958697 for more context.
+
     options.put(
         mDevSettings.isHotModuleReplacementEnabled()
             ? mApplicationContext.getString(R.string.catalyst_hot_reloading_stop)
@@ -1132,22 +1130,6 @@ public void run() {
         });
   }
 
-  @Override
-  public void setReloadOnJSChangeEnabled(final boolean isReloadOnJSChangeEnabled) {
-    if (!mIsDevSupportEnabled) {
-      return;
-    }
-
-    UiThreadUtil.runOnUiThread(
-        new Runnable() {
-          @Override
-          public void run() {
-            mDevSettings.setReloadOnJSChangeEnabled(isReloadOnJSChangeEnabled);
-            handleReloadJS();
-          }
-        });
-  }
-
   @Override
   public void setFpsDebugEnabled(final boolean isFpsDebugEnabled) {
     if (!mIsDevSupportEnabled) {
@@ -1210,17 +1192,6 @@ private void reload() {
       }
 
       mDevServerHelper.openPackagerConnection(this.getClass().getSimpleName(), this);
-      if (mDevSettings.isReloadOnJSChangeEnabled()) {
-        mDevServerHelper.startPollingOnChangeEndpoint(
-            new DevServerHelper.OnServerContentChangeListener() {
-              @Override
-              public void onServerContentChanged() {
-                handleReloadJS();
-              }
-            });
-      } else {
-        mDevServerHelper.stopPollingOnChangeEndpoint();
-      }
     } else {
       // hide FPS debug overlay
       if (mDebugOverlayController != null) {
@@ -1248,7 +1219,6 @@ public void onServerContentChanged() {
       // hide loading view
       mDevLoadingViewController.hide();
       mDevServerHelper.closePackagerConnection();
-      mDevServerHelper.stopPollingOnChangeEndpoint();
     }
   }
 

ReactAndroid/src/main/java/com/facebook/react/devsupport/DisabledDevSupportManager.java

@@ -63,9 +63,6 @@ public void setHotModuleReplacementEnabled(boolean isHotModuleReplacementEnabled
   @Override
   public void setRemoteJSDebugEnabled(boolean isRemoteJSDebugEnabled) {}
 
-  @Override
-  public void setReloadOnJSChangeEnabled(boolean isReloadOnJSChangeEnabled) {}
-
   @Override
   public void setFpsDebugEnabled(boolean isFpsDebugEnabled) {}
 

ReactAndroid/src/main/java/com/facebook/react/devsupport/interfaces/DevSupportManager.java

@@ -68,8 +68,6 @@ public interface DevSupportManager extends NativeModuleCallExceptionHandler {
 
   void setRemoteJSDebugEnabled(final boolean isRemoteJSDebugEnabled);
 
-  void setReloadOnJSChangeEnabled(final boolean isReloadOnJSChangeEnabled);
-
   void setFpsDebugEnabled(final boolean isFpsDebugEnabled);
 
   void toggleElementInspector();

ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java

@@ -54,11 +54,6 @@ public void setIsDebuggingRemotely(boolean isDebugginRemotelyEnabled) {
     mDevSupportManager.setRemoteJSDebugEnabled(isDebugginRemotelyEnabled);
   }
 
-  @ReactMethod
-  public void setLiveReloadEnabled(boolean isLiveReloadEnabled) {
-    mDevSupportManager.setReloadOnJSChangeEnabled(isLiveReloadEnabled);
-  }
-
   @ReactMethod
   public void setProfilingEnabled(boolean isProfilingEnabled) {
     mDevSupportManager.setFpsDebugEnabled(isProfilingEnabled);