httpclient5/src/test/java/org/apache/hc/client5/http/examples/AsyncClientHttpExchange.java

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 * 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.
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 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 * <http://www.apache.org/>.
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 */
package org.apache.hc.client5.http.examples;

import java.util.concurrent.Future;

import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
import org.apache.hc.client5.http.async.methods.SimpleHttpRequests;
import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
import org.apache.hc.core5.concurrent.FutureCallback;
import org.apache.hc.core5.http.HttpHost;
import org.apache.hc.core5.io.CloseMode;
import org.apache.hc.core5.reactor.IOReactorConfig;
import org.apache.hc.core5.util.Timeout;

/**
 * Example of asynchronous HTTP/1.1 request execution.
 */
public class AsyncClientHttpExchange {

    public static void main(final String[] args) throws Exception {

        final IOReactorConfig ioReactorConfig = IOReactorConfig.custom()
                .setSoTimeout(Timeout.ofSeconds(5))
                .build();

        final CloseableHttpAsyncClient client = HttpAsyncClients.custom()
                .setIOReactorConfig(ioReactorConfig)
                .build();

        client.start();

        final HttpHost target = new HttpHost("httpbin.org");
        final String[] requestUris = new String[] {"/", "/ip", "/user-agent", "/headers"};

        for (final String requestUri: requestUris) {
            final SimpleHttpRequest httpget = SimpleHttpRequests.GET.create(target, requestUri);
            System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri());
            final Future<SimpleHttpResponse> future = client.execute(
                    httpget,
                    new FutureCallback<SimpleHttpResponse>() {

                        @Override
                        public void completed(final SimpleHttpResponse response) {
                            System.out.println(requestUri + "->" + response.getCode());
                            System.out.println(response.getBody());
                        }

                        @Override
                        public void failed(final Exception ex) {
                            System.out.println(requestUri + "->" + ex);
                        }

                        @Override
                        public void cancelled() {
                            System.out.println(requestUri + " cancelled");
                        }

                    });
            future.get();
        }

        System.out.println("Shutting down");
        client.close(CloseMode.GRACEFUL);
    }

}