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    import java.util.List;
025    
026    import org.apache.commons.net.PrintCommandListener;
027    import org.apache.commons.net.nntp.Article;
028    import org.apache.commons.net.nntp.NNTPClient;
029    import org.apache.commons.net.nntp.NewsgroupInfo;
030    import org.apache.commons.net.nntp.Threader;
031    
032    
033    public class MessageThreading {
034        public MessageThreading() {
035        }
036        
037        public static void main(String[] args) throws SocketException, IOException {
038            
039            if (args.length != 3)
040                usage();
041            
042            String hostname = args[0];
043            String user = args[1];
044            String password = args[2];
045            
046            NNTPClient client = new NNTPClient();
047            client.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));
048            client.connect(hostname);
049    //      optional authentication
050    //        
051    //        if(!client.authenticate(user, password)) {
052    //            System.out.println("Authentication failed for user " + user + "!");
053    //          //  System.exit(1);
054    //        }
055    //        
056            NewsgroupInfo group = new NewsgroupInfo();
057            client.selectNewsgroup("alt.test", group);
058            
059            long lowArticleNumber = group.getFirstArticle();
060            long highArticleNumber = lowArticleNumber + 5000;
061            
062            System.out.println("Retrieving articles between [" + lowArticleNumber + "] and [" + highArticleNumber + "]");
063            List<Article> articles = NNTPUtils.getArticleInfo(client, lowArticleNumber, highArticleNumber);
064            
065            System.out.println("Building message thread tree...");
066            Threader threader = new Threader();
067            Article root = (Article)threader.thread(articles);
068            
069            Article.printThread(root, 0);
070        }
071        
072        
073        public static void usage() {
074            System.out.println("Usage: MessageThreading <hostname> <user> <password>");
075            System.exit(0);
076        }
077    }