/*
* 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.
*/
package examples.nntp;
import java.io.IOException;
import org.apache.commons.net.nntp.NNTPClient;
import org.apache.commons.net.nntp.NewsgroupInfo;
/***
* This is a trivial example using the NNTP package to approximate the
* Unix newsgroups command. It merely connects to the specified news
* server and issues fetches the list of newsgroups stored by the server.
* On servers that store a lot of newsgroups, this command can take a very
* long time (listing upwards of 30,000 groups).
* <p>
***/
public final class ListNewsgroups
{
public final static void main(String[] args)
{
if (args.length < 1)
{
System.err.println("Usage: newsgroups newsserver [pattern]");
return;
}
NNTPClient client = new NNTPClient();
String pattern = args.length >= 2 ? args[1] : "";
try
{
client.connect(args[0]);
int j = 0;
try {
for(String s : client.iterateNewsgroupListing(pattern)) {
j++;
System.out.println(s);
}
} catch (IOException e1) {
e1.printStackTrace();
}
System.out.println(j);
j = 0;
for(NewsgroupInfo n : client.iterateNewsgroups(pattern)) {
j++;
System.out.println(n.getNewsgroup());
}
System.out.println(j);
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
if (client.isConnected()) {
client.disconnect();
}
}
catch (IOException e)
{
System.err.println("Error disconnecting from server.");
e.printStackTrace();
System.exit(1);
}
}
}
}