/*
* ========================================================================
*
* Copyright 2005 Tim O'Brien.
*
* Licensed 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.
*
* ========================================================================
*/
package com.discursive.jccook.httpclient;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpConnectionManager;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpConnectionManagerParams;
public class MultithreadedExample {
public static void main(String[] args) throws HttpException, IOException, InterruptedException {
MultithreadedExample example = new MultithreadedExample();
example.start();
}
public void start() throws InterruptedException {
HttpConnectionManager connectionManager =
new MultiThreadedHttpConnectionManager();
HttpConnectionManagerParams params = connectionManager.getParams();
params.setIntParameter( HttpConnectionManagerParams.MAX_HOST_CONNECTIONS, 2 );
params.setIntParameter( HttpConnectionManagerParams.MAX_TOTAL_CONNECTIONS, 4 );
List retrievers = new ArrayList();
for( int i = 0; i < 20; i++ ) {
HttpClient client = new HttpClient(connectionManager);
Thread thread = new Thread( new PageRetriever(client) );
retrievers.add( thread );
}
Iterator threadIter = retrievers.iterator();
while( threadIter.hasNext() ) {
Thread thread = (Thread) threadIter.next();
thread.start();
}
}
public class PageRetriever implements Runnable {
private HttpClient client;
public PageRetriever(HttpClient client) {
this.client = client;
}
public void run() {
String url = "http://www.discursive.com/jccook";
HttpMethod method = new GetMethod( url );
try {
client.executeMethod( method );
String response = method.getResponseBodyAsString();
} catch(Exception e) {
System.out.println( "Error making request" );
}
method.releaseConnection();
method.recycle();
}
}
}