/*
* $HeadURL: http://svn.apache.org/repos/asf/jakarta/httpcomponents/httpclient/tags/4.0-alpha1/module-client/src/examples/org/apache/http/examples/client/ClientMultiThreadedExecution.java $
* $Revision: 554233 $
* $Date: 2007-07-07 20:06:54 +0200 (Sat, 07 Jul 2007) $
*
* ====================================================================
*
* 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.client;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.PlainSocketFactory;
import org.apache.http.conn.Scheme;
import org.apache.http.conn.SchemeRegistry;
import org.apache.http.conn.params.HttpConnectionManagerParams;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;
/**
* An example that performs GETs from multiple threads.
*
* @author Michael Becke
*/
public class ClientMultiThreadedExecution {
public static void main(String[] args) throws Exception {
// Create and initialize HTTP parameters
HttpParams params = new BasicHttpParams();
HttpConnectionManagerParams.setMaxTotalConnections(params, 100);
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
// Create and initialize scheme registry
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(
new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
schemeRegistry.register(
new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));
// Create an HttpClient with the ThreadSafeClientConnManager.
// This connection manager must be used if more than one thread will
// be using the HttpClient.
ClientConnectionManager cm = new ThreadSafeClientConnManager(params, schemeRegistry);
HttpClient httpClient = new DefaultHttpClient(cm, params);
// create an array of URIs to perform GETs on
String[] urisToGet = {
"http://jakarta.apache.org/",
"http://jakarta.apache.org/commons/",
"http://jakarta.apache.org/commons/httpclient/",
"http://svn.apache.org/viewvc/jakarta/httpcomponents/"
};
// create a thread for each URI
GetThread[] threads = new GetThread[urisToGet.length];
for (int i = 0; i < threads.length; i++) {
HttpGet httpget = new HttpGet(urisToGet[i]);
threads[i] = new GetThread(httpClient, httpget, i + 1);
}
// start the threads
for (int j = 0; j < threads.length; j++) {
threads[j].start();
}
}
/**
* A thread that performs a GET.
*/
static class GetThread extends Thread {
private HttpClient httpClient;
private HttpContext context;
private HttpGet httpget;
private int id;
public GetThread(HttpClient httpClient, HttpGet httpget, int id) {
this.httpClient = httpClient;
this.context = new HttpClientContext(httpClient.getDefaultContext());
this.httpget = httpget;
this.id = id;
}
/**
* Executes the GetMethod and prints some status information.
*/
public void run() {
System.out.println(id + " - about to get something from " + httpget.getURI());
try {
// execute the method
HttpResponse response = httpClient.execute(httpget, context);
System.out.println(id + " - get executed");
// get the response body as an array of bytes
HttpEntity entity = response.getEntity();
if (entity != null) {
byte[] bytes = EntityUtils.toByteArray(entity);
System.out.println(id + " - " + bytes.length + " bytes read");
}
} catch (Exception e) {
httpget.abort();
System.out.println(id + " - error: " + e);
}
}
}
}