/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, 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.net.Socket;
  import java.net.SocketAddress;
  
  import ch.qos.logback.classic.Logger;
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.classic.net.server.HardenedLoggingEventInputStream;
  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;
      HardenedLoggingEventInputStream hardenedLoggingEventInputStream;
      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);
      }
  
      // public
      // void finalize() {
      // System.err.println("-------------------------Finalize called");
      // System.err.flush();
      // }
  
      public void run() {
  
          try {
              hardenedLoggingEventInputStream = new HardenedLoggingEventInputStream(new BufferedInputStream(socket.getInputStream()));
          } catch (Exception e) {
              logger.error("Could not open ObjectInputStream to " + socket, e);
              closed = true;
          }
  
          ILoggingEvent event;
          Logger remoteLogger;
  
          try {
              while (!closed) {
                  // read an event from the wire
                  event = (ILoggingEvent) hardenedLoggingEventInputStream.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 (hardenedLoggingEventInputStream != null) {
             try {
                 hardenedLoggingEventInputStream.close();
             } catch (IOException e) {
                 logger.warn("Could not close connection.", e);
             } finally {
                 hardenedLoggingEventInputStream = null;
             }
         }
     }
 
     @Override
     public String toString() {
         return this.getClass().getName() + remoteSocketAddress.toString();
     }
 }