| /* |
| * Copyright 2016 The gRPC Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package io.grpc.netty; |
| |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Allows autoFlowControl to be turned on and off from interop testing and flow control windows to |
| * be accessed. |
| */ |
| final class NettyHandlerSettings { |
| |
| private static volatile boolean enabled; |
| |
| private static boolean autoFlowControlOn; |
| // These will be the most recently created handlers created using NettyClientTransport and |
| // NettyServerTransport |
| private static AbstractNettyHandler clientHandler; |
| private static AbstractNettyHandler serverHandler; |
| |
| static void setAutoWindow(AbstractNettyHandler handler) { |
| if (!enabled) { |
| return; |
| } |
| synchronized (NettyHandlerSettings.class) { |
| handler.setAutoTuneFlowControl(autoFlowControlOn); |
| if (handler instanceof NettyClientHandler) { |
| clientHandler = handler; |
| } else if (handler instanceof NettyServerHandler) { |
| serverHandler = handler; |
| } else { |
| throw new RuntimeException("Expecting NettyClientHandler or NettyServerHandler"); |
| } |
| } |
| } |
| |
| public static void enable(boolean enable) { |
| enabled = enable; |
| } |
| |
| public static synchronized void autoWindowOn(boolean autoFlowControl) { |
| autoFlowControlOn = autoFlowControl; |
| } |
| |
| public static synchronized int getLatestClientWindow() { |
| return getLatestWindow(clientHandler); |
| } |
| |
| public static synchronized int getLatestServerWindow() { |
| return getLatestWindow(serverHandler); |
| } |
| |
| private static synchronized int getLatestWindow(AbstractNettyHandler handler) { |
| Preconditions.checkNotNull(handler); |
| return handler.decoder().flowController() |
| .initialWindowSize(handler.connection().connectionStream()); |
| } |
| } |