| /* |
| * ==================================================================== |
| * 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.http.examples.nio.client; |
| |
| import org.apache.http.HttpResponse; |
| import org.apache.http.client.methods.HttpGet; |
| import org.apache.http.concurrent.FutureCallback; |
| import org.apache.http.impl.nio.client.CloseableHttpAsyncClient; |
| import org.apache.http.impl.nio.client.HttpAsyncClients; |
| import org.apache.http.nio.IOControl; |
| import org.apache.http.nio.client.methods.AsyncCharConsumer; |
| import org.apache.http.nio.client.methods.HttpAsyncMethods; |
| import org.apache.http.nio.protocol.HttpAsyncRequestProducer; |
| import org.apache.http.protocol.HttpContext; |
| |
| import java.io.IOException; |
| import java.nio.CharBuffer; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Future; |
| |
| public class QuickStart { |
| |
| public static void main(String[] args) throws Exception { |
| CloseableHttpAsyncClient httpclient = HttpAsyncClients.createDefault(); |
| try { |
| // Start the client |
| httpclient.start(); |
| |
| // Execute request |
| final HttpGet request1 = new HttpGet("http://www.apache.org/"); |
| Future<HttpResponse> future = httpclient.execute(request1, null); |
| // and wait until response is received |
| HttpResponse response1 = future.get(); |
| System.out.println(request1.getRequestLine() + "->" + response1.getStatusLine()); |
| |
| // One most likely would want to use a callback for operation result |
| final CountDownLatch latch1 = new CountDownLatch(1); |
| final HttpGet request2 = new HttpGet("http://www.apache.org/"); |
| httpclient.execute(request2, new FutureCallback<HttpResponse>() { |
| |
| @Override |
| public void completed(final HttpResponse response2) { |
| latch1.countDown(); |
| System.out.println(request2.getRequestLine() + "->" + response2.getStatusLine()); |
| } |
| |
| @Override |
| public void failed(final Exception ex) { |
| latch1.countDown(); |
| System.out.println(request2.getRequestLine() + "->" + ex); |
| } |
| |
| @Override |
| public void cancelled() { |
| latch1.countDown(); |
| System.out.println(request2.getRequestLine() + " cancelled"); |
| } |
| |
| }); |
| latch1.await(); |
| |
| // In real world one most likely would want also want to stream |
| // request and response body content |
| final CountDownLatch latch2 = new CountDownLatch(1); |
| final HttpGet request3 = new HttpGet("http://www.apache.org/"); |
| HttpAsyncRequestProducer producer3 = HttpAsyncMethods.create(request3); |
| AsyncCharConsumer<HttpResponse> consumer3 = new AsyncCharConsumer<HttpResponse>() { |
| |
| HttpResponse response; |
| |
| @Override |
| protected void onResponseReceived(final HttpResponse response) { |
| this.response = response; |
| } |
| |
| @Override |
| protected void onCharReceived(final CharBuffer buf, final IOControl ioctrl) throws IOException { |
| // Do something useful |
| } |
| |
| @Override |
| protected void releaseResources() { |
| } |
| |
| @Override |
| protected HttpResponse buildResult(final HttpContext context) { |
| return this.response; |
| } |
| |
| }; |
| httpclient.execute(producer3, consumer3, new FutureCallback<HttpResponse>() { |
| |
| @Override |
| public void completed(final HttpResponse response3) { |
| latch2.countDown(); |
| System.out.println(request3.getRequestLine() + "->" + response3.getStatusLine()); |
| } |
| |
| @Override |
| public void failed(final Exception ex) { |
| latch2.countDown(); |
| System.out.println(request3.getRequestLine() + "->" + ex); |
| } |
| |
| @Override |
| public void cancelled() { |
| latch2.countDown(); |
| System.out.println(request3.getRequestLine() + " cancelled"); |
| } |
| |
| }); |
| latch2.await(); |
| |
| } finally { |
| httpclient.close(); |
| } |
| } |
| |
| } |