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27 package org.apache.hc.core5.http.examples;
28
29 import java.util.concurrent.CountDownLatch;
30 import java.util.concurrent.TimeUnit;
31
32 import org.apache.hc.core5.concurrent.FutureCallback;
33 import org.apache.hc.core5.http.HttpConnection;
34 import org.apache.hc.core5.http.HttpHost;
35 import org.apache.hc.core5.http.HttpRequest;
36 import org.apache.hc.core5.http.HttpResponse;
37 import org.apache.hc.core5.http.Message;
38 import org.apache.hc.core5.http.impl.Http1StreamListener;
39 import org.apache.hc.core5.http.impl.bootstrap.AsyncRequesterBootstrap;
40 import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncRequester;
41 import org.apache.hc.core5.http.message.RequestLine;
42 import org.apache.hc.core5.http.message.StatusLine;
43 import org.apache.hc.core5.http.nio.entity.StringAsyncEntityConsumer;
44 import org.apache.hc.core5.http.nio.support.AsyncRequestBuilder;
45 import org.apache.hc.core5.http.nio.support.BasicResponseConsumer;
46 import org.apache.hc.core5.io.CloseMode;
47 import org.apache.hc.core5.reactor.IOReactorConfig;
48 import org.apache.hc.core5.util.Timeout;
49
50
51
52
53 public class AsyncRequestExecutionExample {
54
55 public static void main(final String[] args) throws Exception {
56
57 final IOReactorConfig ioReactorConfig = IOReactorConfig.custom()
58 .setSoTimeout(5, TimeUnit.SECONDS)
59 .build();
60
61
62 final HttpAsyncRequester requester = AsyncRequesterBootstrap.bootstrap()
63 .setIOReactorConfig(ioReactorConfig)
64 .setStreamListener(new Http1StreamListener() {
65
66 @Override
67 public void onRequestHead(final HttpConnection connection, final HttpRequest request) {
68 System.out.println(connection.getRemoteAddress() + " " + new RequestLine(request));
69 }
70
71 @Override
72 public void onResponseHead(final HttpConnection connection, final HttpResponse response) {
73 System.out.println(connection.getRemoteAddress() + " " + new StatusLine(response));
74 }
75
76 @Override
77 public void onExchangeComplete(final HttpConnection connection, final boolean keepAlive) {
78 if (keepAlive) {
79 System.out.println(connection.getRemoteAddress() + " exchange completed (connection kept alive)");
80 } else {
81 System.out.println(connection.getRemoteAddress() + " exchange completed (connection closed)");
82 }
83 }
84
85 })
86 .create();
87
88 Runtime.getRuntime().addShutdownHook(new Thread(() -> {
89 System.out.println("HTTP requester shutting down");
90 requester.close(CloseMode.GRACEFUL);
91 }));
92 requester.start();
93
94 final HttpHost target = new HttpHost("httpbin.org");
95 final String[] requestUris = new String[] {"/", "/ip", "/user-agent", "/headers"};
96
97 final CountDownLatch latch = new CountDownLatch(requestUris.length);
98 for (final String requestUri: requestUris) {
99 requester.execute(
100 AsyncRequestBuilder.get()
101 .setHttpHost(target)
102 .setPath(requestUri)
103 .build(),
104 new BasicResponseConsumer<>(new StringAsyncEntityConsumer()),
105 Timeout.ofSeconds(5),
106 new FutureCallback<Message<HttpResponse, String>>() {
107
108 @Override
109 public void completed(final Message<HttpResponse, String> message) {
110 final HttpResponse response = message.getHead();
111 final String body = message.getBody();
112 System.out.println(requestUri + "->" + response.getCode());
113 System.out.println(body);
114 latch.countDown();
115 }
116
117 @Override
118 public void failed(final Exception ex) {
119 System.out.println(requestUri + "->" + ex);
120 latch.countDown();
121 }
122
123 @Override
124 public void cancelled() {
125 System.out.println(requestUri + " cancelled");
126 latch.countDown();
127 }
128
129 });
130 }
131
132 latch.await();
133 System.out.println("Shutting down I/O reactor");
134 requester.initiateShutdown();
135 }
136
137 }