/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.classic.net;
  
  import java.io.BufferedInputStream;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.net.Socket;
  import java.net.SocketAddress;
  
  import ch.qos.logback.classic.Logger;
  
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.classic.spi.ILoggingEvent;
  
  // Contributors: Moses Hohman <mmhohman@rainbow.uchicago.edu>
  
  /**
   * Read {@link ILoggingEvent} objects sent from a remote client using Sockets
   * (TCP). These logging events are logged according to local policy, as if they
   * were generated locally.
   * 
   * <p>
   * For example, the socket node might decide to log events to a local file and
   * also resent them to a second socket node.
   * 
   * @author Ceki G&uuml;lc&uuml;
   * @author S&eacute;bastien Pennec
   * 
   * @since 0.8.4
   */
  public class SocketNode implements Runnable {
  
    Socket socket;
    LoggerContext context;
    ObjectInputStream ois;
    SocketAddress remoteSocketAddress;
    
    Logger logger;
    boolean closed = false;
    SimpleSocketServer socketServer;
    
    public SocketNode(SimpleSocketServer socketServer, Socket socket, LoggerContext context) {
      this.socketServer = socketServer;
      this.socket = socket;
      remoteSocketAddress = socket.getRemoteSocketAddress();
      this.context = context;
      logger = context.getLogger(SocketNode.class);
  
      try {
        ois = new ObjectInputStream(new BufferedInputStream(socket
            .getInputStream()));
      } catch (Exception e) {
        logger.error("Could not open ObjectInputStream to " + socket, e);
      }
    }
  
    // public
    // void finalize() {
    // System.err.println("-------------------------Finalize called");
    // System.err.flush();
    // }
  
    public void run() {
      ILoggingEvent event;
      Logger remoteLogger;
  
      try {
        while (!closed) {
          // read an event from the wire
          event = (ILoggingEvent) ois.readObject();
          // get a logger from the hierarchy. The name of the logger is taken to
          // be the name contained in the event.
          remoteLogger = context.getLogger(event.getLoggerName());
          // apply the logger-level filter
          if (remoteLogger.isEnabledFor(event.getLevel())) {
            // finally log the event as if was generated locally
            remoteLogger.callAppenders(event);
          }
        }
      } catch (java.io.EOFException e) {
        logger.info("Caught java.io.EOFException closing connection.");
      } catch (java.net.SocketException e) {
        logger.info("Caught java.net.SocketException closing connection.");
      } catch (IOException e) {
        logger.info("Caught java.io.IOException: " + e);
        logger.info("Closing connection.");
      } catch (Exception e) {
       logger.error("Unexpected exception. Closing connection.", e);
     }
 
     socketServer.socketNodeClosing(this);
     close();
   }
   
   void close() {
     if(closed) {
       return;
     }
     closed = true;
     if (ois != null) {
       try {
         ois.close();
       } catch (IOException e) {
         logger.warn("Could not close connection.", e);
       } finally {
         ois = null;
       }
     }
   }
   
   @Override
   public String toString() {
     return this.getClass().getName()+remoteSocketAddress.toString();
   }
 }