/**
    * 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.core.util;
  
  import java.net.InetAddress;
  import java.net.UnknownHostException;
  import java.util.Iterator;
  import java.util.Properties;
  
  import ch.qos.logback.core.Context;
  import ch.qos.logback.core.CoreConstants;
  import ch.qos.logback.core.spi.ContextAwareBase;
  
  public class ContextUtil extends ContextAwareBase {
  
    public ContextUtil(Context context) {
      setContext(context);
    }
  
    static String getLocalHostName() throws UnknownHostException {
      InetAddress localhost = InetAddress.getLocalHost();
      return localhost.getHostName();
    }
  
    /**
     * Add the local host's name as a property
     */
    public void addHostNameAsProperty() {
      try {
        String localhostName =  getLocalHostName();
        context.putProperty(CoreConstants.HOSTNAME_KEY, localhostName);
      } catch (UnknownHostException e) {
        addError("Failed to get local hostname", e);
      } catch (SecurityException e) {
        addError("Failed to get local hostname", e);
      }
    }
  
     public void addProperties(Properties props) {
      if (props == null) {
        return;
      }
      Iterator i = props.keySet().iterator();
      while (i.hasNext()) {
        String key = (String) i.next();
        context.putProperty(key, props.getProperty(key));
      }
    }
  }