001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018
019 package examples.nntp;
020
021 import java.io.IOException;
022 import java.io.PrintWriter;
023 import java.net.SocketException;
024
025 import org.apache.commons.net.PrintCommandListener;
026 import org.apache.commons.net.nntp.Article;
027 import org.apache.commons.net.nntp.NNTPClient;
028 import org.apache.commons.net.nntp.NewsgroupInfo;
029 import org.apache.commons.net.nntp.Threader;
030
031
032 public class MessageThreading {
033 public MessageThreading() {
034 }
035
036 public static void main(String[] args) throws SocketException, IOException {
037
038 if (args.length != 3)
039 usage();
040
041 String hostname = args[0];
042 String user = args[1];
043 String password = args[2];
044
045 NNTPClient client = new NNTPClient();
046 client.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));
047 client.connect(hostname);
048
049 if(!client.authenticate(user, password)) {
050 System.out.println("Authentication failed for user " + user + "!");
051 System.exit(1);
052 }
053
054 NewsgroupInfo group = new NewsgroupInfo();
055 client.selectNewsgroup("comp.lang.lisp", group);
056
057 int lowArticleNumber = group.getFirstArticle();
058 int highArticleNumber = lowArticleNumber + 100;
059
060 System.out.println("Retrieving articles between [" + lowArticleNumber + "] and [" + highArticleNumber + "]");
061 Article[] articles = NNTPUtils.getArticleInfo(client, lowArticleNumber, highArticleNumber);
062
063 System.out.println("Building message thread tree...");
064 Threader threader = new Threader();
065 Article root = (Article)threader.thread(articles);
066
067 Article.printThread(root, 0);
068
069 }
070
071
072 public static void usage() {
073 System.out.println("Usage: MessageThreading <hostname> <user> <password>");
074 System.exit(0);
075 }
076 }