| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.tinkerpop.gremlin.socket.server; |
| |
| import io.netty.channel.ChannelInitializer; |
| import io.netty.channel.ChannelPipeline; |
| import io.netty.channel.socket.SocketChannel; |
| import io.netty.handler.codec.http.HttpObjectAggregator; |
| import io.netty.handler.codec.http.HttpServerCodec; |
| import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler; |
| import io.netty.handler.codec.http.websocketx.extensions.compression.WebSocketServerCompressionHandler; |
| |
| /** |
| * Class that holds the channelizers that can used for testing with the SimpleSocketServer. |
| */ |
| public class TestChannelizers { |
| |
| /** |
| * A base ChannelInitializer that setups the pipeline for HTTP handling. This class should be sub-classed by a |
| * handler that handles the actual data being received. |
| */ |
| public static abstract class TestHttpServerInitializer extends ChannelInitializer<SocketChannel> { |
| protected static final String WEBSOCKET_PATH = "/gremlin"; |
| |
| @Override |
| public void initChannel(SocketChannel ch) { |
| final ChannelPipeline pipeline = ch.pipeline(); |
| pipeline.addLast(new HttpServerCodec()); |
| pipeline.addLast(new HttpObjectAggregator(65536)); |
| } |
| } |
| |
| /** |
| * A vanilla WebSocket server Initializer implementation using Netty. This initializer would configure the server |
| * for WebSocket handshake and decoding incoming WebSocket frames. |
| */ |
| public static abstract class TestWebSocketServerInitializer extends TestChannelizers.TestHttpServerInitializer { |
| |
| @Override |
| public void initChannel(SocketChannel ch) { |
| super.initChannel(ch); |
| |
| final ChannelPipeline pipeline = ch.pipeline(); |
| pipeline.addLast(new WebSocketServerCompressionHandler()); |
| pipeline.addLast(new WebSocketServerProtocolHandler(WEBSOCKET_PATH, null, true)); |
| this.postInit(ch.pipeline()); |
| } |
| |
| public abstract void postInit(final ChannelPipeline ch); |
| } |
| |
| /** |
| * An initializer that adds a handler that will drop WebSocket frames. |
| */ |
| public static class TestWSNoOpInitializer extends TestHttpServerInitializer { |
| |
| @Override |
| public void initChannel(SocketChannel ch) { |
| super.initChannel(ch); |
| ch.pipeline().addLast(new TestHandlers.NoOpWebSocketServerHandler(WEBSOCKET_PATH)); |
| } |
| } |
| |
| /** |
| * An initializer that adds a handler to mimics a server that is throttling connections. |
| */ |
| public static class TestConnectionThrottlingInitializer extends TestHttpServerInitializer { |
| int connectionCount = 0; |
| private SocketServerSettings settings; |
| |
| public TestConnectionThrottlingInitializer(SocketServerSettings settings) { this.settings = settings; } |
| |
| @Override |
| public void initChannel(SocketChannel ch) { |
| super.initChannel(ch); |
| |
| final ChannelPipeline pipeline = ch.pipeline(); |
| if (connectionCount < 1) { |
| pipeline.addLast(new WebSocketServerCompressionHandler()); |
| pipeline.addLast(new WebSocketServerProtocolHandler(WEBSOCKET_PATH, null, true)); |
| pipeline.addLast(new TestWSGremlinInitializer.ClientTestConfigurableHandler(settings)); |
| } else { |
| pipeline.addLast(new TestHandlers.NoOpWebSocketServerHandler(WEBSOCKET_PATH)); |
| } |
| |
| connectionCount++; |
| } |
| } |
| } |