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27 package org.apache.hc.client5.http.examples;
28
29 import java.util.concurrent.CountDownLatch;
30 import java.util.concurrent.Future;
31 import java.util.concurrent.TimeUnit;
32
33 import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
34 import org.apache.hc.client5.http.async.methods.SimpleHttpRequests;
35 import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
36 import org.apache.hc.client5.http.async.methods.SimpleRequestProducer;
37 import org.apache.hc.client5.http.async.methods.SimpleResponseConsumer;
38 import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
39 import org.apache.hc.client5.http.impl.async.MinimalHttpAsyncClient;
40 import org.apache.hc.core5.concurrent.FutureCallback;
41 import org.apache.hc.core5.http.HttpHost;
42 import org.apache.hc.core5.http.nio.AsyncClientEndpoint;
43 import org.apache.hc.core5.http2.HttpVersionPolicy;
44 import org.apache.hc.core5.http2.config.H2Config;
45 import org.apache.hc.core5.io.CloseMode;
46 import org.apache.hc.core5.reactor.IOReactorConfig;
47 import org.apache.hc.core5.util.Timeout;
48
49
50
51
52
53 public class AsyncClientH2Multiplexing {
54
55 public static void main(final String[] args) throws Exception {
56
57 final IOReactorConfig ioReactorConfig = IOReactorConfig.custom()
58 .setSoTimeout(Timeout.ofSeconds(5))
59 .build();
60
61 final MinimalHttpAsyncClient client = HttpAsyncClients.createMinimal(
62 HttpVersionPolicy.FORCE_HTTP_2, H2Config.DEFAULT, null, ioReactorConfig);
63
64 client.start();
65
66 final HttpHost target = new HttpHost("nghttp2.org");
67 final Future<AsyncClientEndpoint> leaseFuture = client.lease(target, null);
68 final AsyncClientEndpoint endpoint = leaseFuture.get(30, TimeUnit.SECONDS);
69 try {
70 final String[] requestUris = new String[] {"/httpbin/ip", "/httpbin/user-agent", "/httpbin/headers"};
71
72 final CountDownLatch latch = new CountDownLatch(requestUris.length);
73 for (final String requestUri: requestUris) {
74 final SimpleHttpRequest request = SimpleHttpRequests.get(target, requestUri);
75 endpoint.execute(
76 SimpleRequestProducer.create(request),
77 SimpleResponseConsumer.create(),
78 new FutureCallback<SimpleHttpResponse>() {
79
80 @Override
81 public void completed(final SimpleHttpResponse response) {
82 latch.countDown();
83 System.out.println(requestUri + "->" + response.getCode());
84 System.out.println(response.getBody());
85 }
86
87 @Override
88 public void failed(final Exception ex) {
89 latch.countDown();
90 System.out.println(requestUri + "->" + ex);
91 }
92
93 @Override
94 public void cancelled() {
95 latch.countDown();
96 System.out.println(requestUri + " cancelled");
97 }
98
99 });
100 }
101 latch.await();
102 } finally {
103 endpoint.releaseAndReuse();
104 }
105
106 System.out.println("Shutting down");
107 client.close(CloseMode.GRACEFUL);
108 }
109
110 }