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19 package examples.nntp;
20
21 import java.io.IOException;
22 import java.io.PrintWriter;
23 import java.net.SocketException;
24 import org.apache.commons.net.PrintCommandListener;
25 import org.apache.commons.net.nntp.Article;
26 import org.apache.commons.net.nntp.NNTPClient;
27 import org.apache.commons.net.nntp.NewsgroupInfo;
28 import org.apache.commons.net.nntp.Threader;
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32
33 public class MessageThreading {
34 public MessageThreading() {
35 }
36
37 public static void main(String[] args) throws SocketException, IOException {
38
39 if (args.length != 2 && args.length != 4) {
40 System.out.println("Usage: MessageThreading <hostname> <groupname> [<user> <password>]");
41 return;
42 }
43
44 String hostname = args[0];
45 String newsgroup = args[1];
46
47 NNTPClient client = new NNTPClient();
48 client.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out), true));
49 client.connect(hostname);
50
51 if (args.length == 4) {
52 String user = args[2];
53 String password = args[3];
54 if(!client.authenticate(user, password)) {
55 System.out.println("Authentication failed for user " + user + "!");
56 System.exit(1);
57 }
58 }
59
60 String fmt[] = client.listOverviewFmt();
61 if (fmt != null) {
62 System.out.println("LIST OVERVIEW.FMT:");
63 for(String s : fmt) {
64 System.out.println(s);
65 }
66 } else {
67 System.out.println("Failed to get OVERVIEW.FMT");
68 }
69 NewsgroupInfo group = new NewsgroupInfo();
70 client.selectNewsgroup(newsgroup, group);
71
72 long lowArticleNumber = group.getFirstArticleLong();
73 long highArticleNumber = lowArticleNumber + 5000;
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75 System.out.println("Retrieving articles between [" + lowArticleNumber + "] and [" + highArticleNumber + "]");
76 Iterable<Article> articles = client.iterateArticleInfo(lowArticleNumber, highArticleNumber);
77
78 System.out.println("Building message thread tree...");
79 Threader threader = new Threader();
80 Article root = (Article)threader.thread(articles);
81
82 Article.printThread(root, 0);
83 }
84
85 }