| /* |
| * ==================================================================== |
| * 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; |
| |
| import java.io.IOException; |
| import java.io.InterruptedIOException; |
| import java.util.concurrent.CountDownLatch; |
| |
| import org.apache.http.HttpHost; |
| import org.apache.http.HttpRequestInterceptor; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.concurrent.FutureCallback; |
| import org.apache.http.impl.DefaultConnectionReuseStrategy; |
| import org.apache.http.impl.nio.DefaultHttpClientIODispatch; |
| import org.apache.http.impl.nio.pool.BasicNIOConnPool; |
| import org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor; |
| import org.apache.http.message.BasicHttpRequest; |
| import org.apache.http.nio.protocol.BasicAsyncRequestProducer; |
| import org.apache.http.nio.protocol.BasicAsyncResponseConsumer; |
| import org.apache.http.nio.protocol.HttpAsyncRequestExecutor; |
| import org.apache.http.nio.protocol.HttpAsyncRequester; |
| import org.apache.http.nio.reactor.ConnectingIOReactor; |
| import org.apache.http.nio.reactor.IOEventDispatch; |
| import org.apache.http.params.CoreConnectionPNames; |
| import org.apache.http.params.CoreProtocolPNames; |
| import org.apache.http.params.HttpParams; |
| import org.apache.http.params.SyncBasicHttpParams; |
| import org.apache.http.protocol.BasicHttpContext; |
| import org.apache.http.protocol.HttpProcessor; |
| import org.apache.http.protocol.ImmutableHttpProcessor; |
| import org.apache.http.protocol.RequestConnControl; |
| import org.apache.http.protocol.RequestContent; |
| import org.apache.http.protocol.RequestExpectContinue; |
| import org.apache.http.protocol.RequestTargetHost; |
| import org.apache.http.protocol.RequestUserAgent; |
| |
| /** |
| * Asynchronous HTTP/1.1 client. |
| */ |
| public class NHttpClient { |
| |
| public static void main(String[] args) throws Exception { |
| // HTTP parameters for the client |
| HttpParams params = new SyncBasicHttpParams(); |
| params |
| .setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 3000) |
| .setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 3000) |
| .setIntParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE, 8 * 1024) |
| .setParameter(CoreProtocolPNames.USER_AGENT, "Test/1.1"); |
| // Create HTTP protocol processing chain |
| HttpProcessor httpproc = new ImmutableHttpProcessor(new HttpRequestInterceptor[] { |
| // Use standard client-side protocol interceptors |
| new RequestContent(), |
| new RequestTargetHost(), |
| new RequestConnControl(), |
| new RequestUserAgent(), |
| new RequestExpectContinue()}); |
| // Create client-side HTTP protocol handler |
| HttpAsyncRequestExecutor protocolHandler = new HttpAsyncRequestExecutor(); |
| // Create client-side I/O event dispatch |
| final IOEventDispatch ioEventDispatch = new DefaultHttpClientIODispatch(protocolHandler, params); |
| // Create client-side I/O reactor |
| final ConnectingIOReactor ioReactor = new DefaultConnectingIOReactor(); |
| // Create HTTP connection pool |
| BasicNIOConnPool pool = new BasicNIOConnPool(ioReactor, params); |
| // Limit total number of connections to just two |
| pool.setDefaultMaxPerRoute(2); |
| pool.setMaxTotal(2); |
| // Run the I/O reactor in a separate thread |
| Thread t = new Thread(new Runnable() { |
| |
| public void run() { |
| try { |
| // Ready to go! |
| ioReactor.execute(ioEventDispatch); |
| } catch (InterruptedIOException ex) { |
| System.err.println("Interrupted"); |
| } catch (IOException e) { |
| System.err.println("I/O error: " + e.getMessage()); |
| } |
| System.out.println("Shutdown"); |
| } |
| |
| }); |
| // Start the client thread |
| t.start(); |
| // Create HTTP requester |
| HttpAsyncRequester requester = new HttpAsyncRequester( |
| httpproc, new DefaultConnectionReuseStrategy(), params); |
| // Execute HTTP GETs to the following hosts and |
| HttpHost[] targets = new HttpHost[] { |
| new HttpHost("www.apache.org", 80, "http"), |
| new HttpHost("www.verisign.com", 443, "https"), |
| new HttpHost("www.google.com", 80, "http") |
| }; |
| final CountDownLatch latch = new CountDownLatch(targets.length); |
| for (final HttpHost target: targets) { |
| BasicHttpRequest request = new BasicHttpRequest("GET", "/"); |
| requester.execute( |
| new BasicAsyncRequestProducer(target, request), |
| new BasicAsyncResponseConsumer(), |
| pool, |
| new BasicHttpContext(), |
| // Handle HTTP response from a callback |
| new FutureCallback<HttpResponse>() { |
| |
| public void completed(final HttpResponse response) { |
| latch.countDown(); |
| System.out.println(target + "->" + response.getStatusLine()); |
| } |
| |
| public void failed(final Exception ex) { |
| latch.countDown(); |
| System.out.println(target + "->" + ex); |
| } |
| |
| public void cancelled() { |
| latch.countDown(); |
| System.out.println(target + " cancelled"); |
| } |
| |
| }); |
| } |
| latch.await(); |
| System.out.println("Shutting down I/O reactor"); |
| ioReactor.shutdown(); |
| System.out.println("Done"); |
| } |
| |
| } |