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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17
    18  package org.apache.log4j.net;
    19
    20  import java.net.Socket;
    21  import java.net.ServerSocket;
    22
    23  import org.apache.log4j.Logger;
    24  import org.apache.log4j.LogManager;
    25  import org.apache.log4j.PropertyConfigurator;
    26  import org.apache.log4j.xml.DOMConfigurator;
    27
    28
    29  /***
    30   *  A simple {@link SocketNode} based server.
    31   *
    32     <pre>
    33     <b>Usage:</b> java org.apache.log4j.net.SimpleSocketServer port configFile
    34
    35     where <em>port</em> is a part number where the server listens and
    36     <em>configFile</em> is a configuration file fed to the {@link
    37     PropertyConfigurator} or to {@link DOMConfigurator} if an XML file.
    38     </pre>
    39    *
    40    * @author  Ceki G&uuml;lc&uuml;
    41    *
    42    *  @since 0.8.4
    43    * */
    44  public class SimpleSocketServer  {
    45
    46    static Logger cat = Logger.getLogger(SimpleSocketServer.class);
    47
    48    static int port;
    49
    50    public
    51    static
    52    void main(String argv[]) {
    53      if(argv.length == 2) {
    54        init(argv[0], argv[1]);
    55      } else {
    56        usage("Wrong number of arguments.");
    57      }
    58
    59      try {
    60        cat.info("Listening on port " + port);
    61        ServerSocket serverSocket = new ServerSocket(port);
    62        while(true) {
    63  	cat.info("Waiting to accept a new client.");
    64  	Socket socket = serverSocket.accept();
    65  	cat.info("Connected to client at " + socket.getInetAddress());
    66  	cat.info("Starting new socket node.");
    67  	new Thread(new SocketNode(socket,
    68  				  LogManager.getLoggerRepository())).start();
    69        }
    70      } catch(Exception e) {
    71        e.printStackTrace();
    72      }
    73    }
    74
    75
    76    static void  usage(String msg) {
    77      System.err.println(msg);
    78      System.err.println(
    79        "Usage: java " +SimpleSocketServer.class.getName() + " port configFile");
    80      System.exit(1);
    81    }
    82
    83    static void init(String portStr, String configFile) {
    84      try {
    85        port = Integer.parseInt(portStr);
    86      } catch(java.lang.NumberFormatException e) {
    87        e.printStackTrace();
    88        usage("Could not interpret port number ["+ portStr +"].");
    89      }
    90
    91      if(configFile.endsWith(".xml")) {
    92        DOMConfigurator.configure(configFile);
    93      } else {
    94        PropertyConfigurator.configure(configFile);
    95      }
    96    }
    97  }