| /* |
| * 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.driver.simple; |
| |
| import io.netty.buffer.PooledByteBufAllocator; |
| import io.netty.channel.ChannelOption; |
| import io.netty.handler.codec.http.EmptyHttpHeaders; |
| import io.netty.handler.codec.http.HttpHeaders; |
| import org.apache.tinkerpop.gremlin.driver.MessageSerializer; |
| import org.apache.tinkerpop.gremlin.driver.handler.WebSocketClientHandler; |
| import org.apache.tinkerpop.gremlin.driver.handler.WebSocketGremlinRequestEncoder; |
| import org.apache.tinkerpop.gremlin.driver.handler.WebSocketGremlinResponseDecoder; |
| import org.apache.tinkerpop.gremlin.driver.message.RequestMessage; |
| import io.netty.bootstrap.Bootstrap; |
| import io.netty.channel.Channel; |
| import io.netty.channel.ChannelInitializer; |
| import io.netty.channel.ChannelPipeline; |
| import io.netty.channel.socket.SocketChannel; |
| import io.netty.channel.socket.nio.NioSocketChannel; |
| import io.netty.handler.codec.http.HttpClientCodec; |
| import io.netty.handler.codec.http.HttpObjectAggregator; |
| import io.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory; |
| import io.netty.handler.codec.http.websocketx.WebSocketVersion; |
| import org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * A simple, non-thread safe Gremlin Server client using websockets. Typical use is for testing and demonstration. |
| * |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public class WebSocketClient extends AbstractClient { |
| private final Channel channel; |
| |
| public WebSocketClient() { |
| this(URI.create("ws://localhost:8182/gremlin")); |
| } |
| |
| public WebSocketClient(final URI uri) { |
| super("ws-client-%d"); |
| final Bootstrap b = new Bootstrap().group(group); |
| b.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT); |
| |
| final String protocol = uri.getScheme(); |
| if (!"ws".equals(protocol)) |
| throw new IllegalArgumentException("Unsupported protocol: " + protocol); |
| |
| try { |
| final WebSocketClientHandler wsHandler = |
| new WebSocketClientHandler( |
| WebSocketClientHandshakerFactory.newHandshaker( |
| uri, WebSocketVersion.V13, null, false, EmptyHttpHeaders.INSTANCE, 65536)); |
| final MessageSerializer serializer = new GryoMessageSerializerV3d0(); |
| b.channel(NioSocketChannel.class) |
| .handler(new ChannelInitializer<SocketChannel>() { |
| @Override |
| protected void initChannel(final SocketChannel ch) { |
| final ChannelPipeline p = ch.pipeline(); |
| p.addLast( |
| new HttpClientCodec(), |
| new HttpObjectAggregator(65536), |
| wsHandler, |
| new WebSocketGremlinRequestEncoder(true, serializer), |
| new WebSocketGremlinResponseDecoder(serializer), |
| callbackResponseHandler); |
| } |
| }); |
| |
| channel = b.connect(uri.getHost(), uri.getPort()).sync().channel(); |
| wsHandler.handshakeFuture().get(10000, TimeUnit.MILLISECONDS); |
| } catch (Exception ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| @Override |
| public void writeAndFlush(final RequestMessage requestMessage) throws Exception { |
| channel.writeAndFlush(requestMessage).get(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| channel.close().get(); |
| } catch (Exception ignored) { |
| |
| } finally { |
| group.shutdownGracefully().awaitUninterruptibly(); |
| } |
| } |
| } |