| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.core5.http2.examples; |
| |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.hc.core5.concurrent.FutureCallback; |
| import org.apache.hc.core5.http.Header; |
| import org.apache.hc.core5.http.HttpConnection; |
| import org.apache.hc.core5.http.HttpHost; |
| import org.apache.hc.core5.http.HttpResponse; |
| import org.apache.hc.core5.http.Message; |
| import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncRequester; |
| import org.apache.hc.core5.http.nio.AsyncClientEndpoint; |
| import org.apache.hc.core5.http.nio.entity.StringAsyncEntityConsumer; |
| import org.apache.hc.core5.http.nio.support.AsyncRequestBuilder; |
| import org.apache.hc.core5.http.nio.support.BasicResponseConsumer; |
| import org.apache.hc.core5.http2.HttpVersionPolicy; |
| import org.apache.hc.core5.http2.config.H2Config; |
| import org.apache.hc.core5.http2.frame.RawFrame; |
| import org.apache.hc.core5.http2.impl.nio.H2StreamListener; |
| import org.apache.hc.core5.http2.impl.nio.bootstrap.H2RequesterBootstrap; |
| import org.apache.hc.core5.io.CloseMode; |
| import org.apache.hc.core5.reactor.IOReactorConfig; |
| import org.apache.hc.core5.util.Timeout; |
| |
| /** |
| * Example of HTTP/2 concurrent request execution using multiple streams. |
| */ |
| public class H2MultiStreamExecutionExample { |
| |
| public static void main(final String[] args) throws Exception { |
| |
| // Create and start requester |
| final IOReactorConfig ioReactorConfig = IOReactorConfig.custom() |
| .setSoTimeout(5, TimeUnit.SECONDS) |
| .build(); |
| |
| final H2Config h2Config = H2Config.custom() |
| .setPushEnabled(false) |
| .setMaxConcurrentStreams(100) |
| .build(); |
| |
| final HttpAsyncRequester requester = H2RequesterBootstrap.bootstrap() |
| .setIOReactorConfig(ioReactorConfig) |
| .setVersionPolicy(HttpVersionPolicy.FORCE_HTTP_2) |
| .setH2Config(h2Config) |
| .setStreamListener(new H2StreamListener() { |
| |
| @Override |
| public void onHeaderInput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) { |
| for (int i = 0; i < headers.size(); i++) { |
| System.out.println(connection.getRemoteAddress() + " (" + streamId + ") << " + headers.get(i)); |
| } |
| } |
| |
| @Override |
| public void onHeaderOutput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) { |
| for (int i = 0; i < headers.size(); i++) { |
| System.out.println(connection.getRemoteAddress() + " (" + streamId + ") >> " + headers.get(i)); |
| } |
| } |
| |
| @Override |
| public void onFrameInput(final HttpConnection connection, final int streamId, final RawFrame frame) { |
| } |
| |
| @Override |
| public void onFrameOutput(final HttpConnection connection, final int streamId, final RawFrame frame) { |
| } |
| |
| @Override |
| public void onInputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) { |
| } |
| |
| @Override |
| public void onOutputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) { |
| } |
| |
| }) |
| .create(); |
| Runtime.getRuntime().addShutdownHook(new Thread() { |
| @Override |
| public void run() { |
| System.out.println("HTTP requester shutting down"); |
| requester.close(CloseMode.GRACEFUL); |
| } |
| }); |
| requester.start(); |
| |
| final HttpHost target = new HttpHost("nghttp2.org"); |
| final String[] requestUris = new String[] {"/httpbin/ip", "/httpbin/user-agent", "/httpbin/headers"}; |
| |
| final Future<AsyncClientEndpoint> future = requester.connect(target, Timeout.ofSeconds(5)); |
| final AsyncClientEndpoint clientEndpoint = future.get(); |
| |
| final CountDownLatch latch = new CountDownLatch(requestUris.length); |
| for (final String requestUri: requestUris) { |
| clientEndpoint.execute( |
| AsyncRequestBuilder.get() |
| .setHttpHost(target) |
| .setPath(requestUri) |
| .build(), |
| new BasicResponseConsumer<>(new StringAsyncEntityConsumer()), |
| new FutureCallback<Message<HttpResponse, String>>() { |
| |
| @Override |
| public void completed(final Message<HttpResponse, String> message) { |
| latch.countDown(); |
| final HttpResponse response = message.getHead(); |
| final String body = message.getBody(); |
| System.out.println(requestUri + "->" + response.getCode()); |
| System.out.println(body); |
| } |
| |
| @Override |
| public void failed(final Exception ex) { |
| latch.countDown(); |
| System.out.println(requestUri + "->" + ex); |
| } |
| |
| @Override |
| public void cancelled() { |
| latch.countDown(); |
| System.out.println(requestUri + " cancelled"); |
| } |
| |
| }); |
| } |
| |
| latch.await(); |
| |
| // Manually release client endpoint when done !!! |
| clientEndpoint.releaseAndDiscard(); |
| |
| System.out.println("Shutting down I/O reactor"); |
| requester.initiateShutdown(); |
| } |
| |
| } |