Java tutorial
/** * 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.hadoop.hdfs.server.datanode.web.dtp; import static org.junit.Assert.assertEquals; import io.netty.bootstrap.Bootstrap; import io.netty.buffer.ByteBuf; import io.netty.channel.Channel; import io.netty.channel.ChannelInitializer; import io.netty.channel.EventLoopGroup; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.nio.NioSocketChannel; import io.netty.handler.codec.http.DefaultFullHttpRequest; import io.netty.handler.codec.http.FullHttpRequest; import io.netty.handler.codec.http.FullHttpResponse; import io.netty.handler.codec.http.HttpMethod; import io.netty.handler.codec.http.HttpResponseStatus; import io.netty.handler.codec.http.HttpVersion; import io.netty.handler.codec.http2.DefaultHttp2Connection; import io.netty.handler.codec.http2.DefaultHttp2FrameReader; import io.netty.handler.codec.http2.DefaultHttp2FrameWriter; import io.netty.handler.codec.http2.DelegatingDecompressorFrameListener; import io.netty.handler.codec.http2.Http2Connection; import io.netty.handler.codec.http2.Http2ConnectionHandler; import io.netty.handler.codec.http2.Http2FrameLogger; import io.netty.handler.codec.http2.Http2FrameReader; import io.netty.handler.codec.http2.Http2FrameWriter; import io.netty.handler.codec.http2.Http2InboundFrameLogger; import io.netty.handler.codec.http2.Http2OutboundFrameLogger; import io.netty.handler.codec.http2.HttpToHttp2ConnectionHandler; import io.netty.handler.codec.http2.HttpUtil; import io.netty.handler.codec.http2.InboundHttp2ToHttpAdapter; import io.netty.handler.logging.LogLevel; import io.netty.handler.timeout.TimeoutException; import io.netty.util.concurrent.Promise; import java.io.IOException; import java.net.URISyntaxException; import java.nio.charset.StandardCharsets; import java.util.concurrent.ExecutionException; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hdfs.MiniDFSCluster; import org.apache.hadoop.hdfs.web.WebHdfsTestUtil; import org.junit.AfterClass; import org.junit.BeforeClass; import org.junit.Test; public class TestDtpHttp2 { private static final Http2FrameLogger FRAME_LOGGER = new Http2FrameLogger(LogLevel.INFO, TestDtpHttp2.class); private static final Configuration CONF = WebHdfsTestUtil.createConf(); private static MiniDFSCluster CLUSTER; private static final EventLoopGroup WORKER_GROUP = new NioEventLoopGroup(); private static Channel CHANNEL; private static Http2ResponseHandler RESPONSE_HANDLER; @BeforeClass public static void setUp() throws IOException, URISyntaxException, TimeoutException { CLUSTER = new MiniDFSCluster.Builder(CONF).numDataNodes(1).build(); CLUSTER.waitActive(); RESPONSE_HANDLER = new Http2ResponseHandler(); Bootstrap bootstrap = new Bootstrap().group(WORKER_GROUP).channel(NioSocketChannel.class) .remoteAddress("127.0.0.1", CLUSTER.getDataNodes().get(0).getInfoPort()) .handler(new ChannelInitializer<Channel>() { @Override protected void initChannel(Channel ch) throws Exception { Http2Connection connection = new DefaultHttp2Connection(false); Http2ConnectionHandler connectionHandler = new HttpToHttp2ConnectionHandler(connection, frameReader(), frameWriter(), new DelegatingDecompressorFrameListener(connection, new InboundHttp2ToHttpAdapter.Builder(connection) .maxContentLength(Integer.MAX_VALUE).propagateSettings(true) .build())); ch.pipeline().addLast(connectionHandler, RESPONSE_HANDLER); } }); CHANNEL = bootstrap.connect().syncUninterruptibly().channel(); } @AfterClass public static void tearDown() throws IOException { if (CHANNEL != null) { CHANNEL.close().syncUninterruptibly(); } WORKER_GROUP.shutdownGracefully(); if (CLUSTER != null) { CLUSTER.shutdown(); } } private static Http2FrameReader frameReader() { return new Http2InboundFrameLogger(new DefaultHttp2FrameReader(), FRAME_LOGGER); } private static Http2FrameWriter frameWriter() { return new Http2OutboundFrameLogger(new DefaultHttp2FrameWriter(), FRAME_LOGGER); } @Test public void test() throws InterruptedException, ExecutionException { int streamId = 3; FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, "/"); request.headers().add(HttpUtil.ExtensionHeaderNames.STREAM_ID.text(), streamId); Promise<FullHttpResponse> promise = CHANNEL.eventLoop().newPromise(); synchronized (RESPONSE_HANDLER) { CHANNEL.writeAndFlush(request); RESPONSE_HANDLER.put(streamId, promise); } assertEquals(HttpResponseStatus.OK, promise.get().status()); ByteBuf content = promise.get().content(); assertEquals("HTTP/2 DTP", content.toString(StandardCharsets.UTF_8)); } }