| /* |
| * 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.channel.ChannelHandlerContext; |
| import io.netty.channel.EventLoopGroup; |
| import io.netty.channel.SimpleChannelInboundHandler; |
| import io.netty.channel.nio.NioEventLoopGroup; |
| import org.apache.commons.lang3.concurrent.BasicThreadFactory; |
| import org.apache.tinkerpop.gremlin.util.message.RequestMessage; |
| import org.apache.tinkerpop.gremlin.util.message.ResponseMessage; |
| import org.apache.tinkerpop.gremlin.util.message.ResponseStatusCode; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.Consumer; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public abstract class AbstractClient implements SimpleClient { |
| protected final CallbackResponseHandler callbackResponseHandler = new CallbackResponseHandler(); |
| protected final EventLoopGroup group; |
| |
| public AbstractClient(final String threadPattern) { |
| final BasicThreadFactory threadFactory = new BasicThreadFactory.Builder().namingPattern(threadPattern).build(); |
| group = new NioEventLoopGroup(1, threadFactory); |
| } |
| |
| public abstract void writeAndFlush(final RequestMessage requestMessage) throws Exception; |
| |
| @Override |
| public void submit(final RequestMessage requestMessage, final Consumer<ResponseMessage> callback) throws Exception { |
| callbackResponseHandler.callback = callback; |
| writeAndFlush(requestMessage); |
| } |
| |
| @Override |
| public List<ResponseMessage> submit(final RequestMessage requestMessage) throws Exception { |
| // this is just a test client to force certain behaviors of the server. hanging tests are a pain to deal with |
| // especially in travis as it's not always clear where the hang is. a few reasonable timeouts might help |
| // make debugging easier when we look at logs |
| return submitAsync(requestMessage).get(180, TimeUnit.SECONDS); |
| } |
| |
| @Override |
| public CompletableFuture<List<ResponseMessage>> submitAsync(final RequestMessage requestMessage) throws Exception { |
| final List<ResponseMessage> results = new ArrayList<>(); |
| final CompletableFuture<List<ResponseMessage>> f = new CompletableFuture<>(); |
| callbackResponseHandler.callback = response -> { |
| if (f.isDone()) |
| throw new RuntimeException("A terminating message was already encountered - no more messages should have been received"); |
| |
| results.add(response); |
| |
| // check if the current message is terminating - if it is then we can mark complete |
| if (response.getStatus().getCode().isFinalResponse()) { |
| f.complete(results); |
| } |
| }; |
| |
| writeAndFlush(requestMessage); |
| |
| return f; |
| } |
| |
| static class CallbackResponseHandler extends SimpleChannelInboundHandler<ResponseMessage> { |
| public Consumer<ResponseMessage> callback; |
| |
| @Override |
| protected void channelRead0(final ChannelHandlerContext channelHandlerContext, final ResponseMessage response) throws Exception { |
| callback.accept(response); |
| } |
| } |
| } |