chris@0: /*
chris@0:  *   StarOffice News Server
chris@0:  *   see AUTHORS for the list of contributors
chris@0:  *
chris@0:  *   This program is free software: you can redistribute it and/or modify
chris@0:  *   it under the terms of the GNU General Public License as published by
chris@0:  *   the Free Software Foundation, either version 3 of the License, or
chris@0:  *   (at your option) any later version.
chris@0:  *
chris@0:  *   This program is distributed in the hope that it will be useful,
chris@0:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
chris@0:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
chris@0:  *   GNU General Public License for more details.
chris@0:  *
chris@0:  *   You should have received a copy of the GNU General Public License
chris@0:  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
chris@0:  */
chris@0: 
chris@0: package com.so.news;
chris@0: 
chris@0: import java.io.FileInputStream;
chris@0: import java.io.FileNotFoundException;
chris@0: import java.io.FileOutputStream;
chris@0: import java.io.IOException;
chris@0: import java.util.Properties;
chris@0: 
chris@0: /**
chris@0:  * Manages the n3tpd configuration.
chris@0:  * @author Christian Lins
chris@0:  */
chris@0: public class Config
chris@0: {
chris@0:   /** The filename of the logfile */
chris@0:   public static final String CONFIG_N3TPD_LOGFILE = "n3tpd.logfile";
chris@0:   
chris@0:   /** The filename of the config file that is loaded on startup */
chris@0:   public static final String FILE                 = "n3tpd.conf";
chris@0: 
chris@0:   private static final Properties defaultConfig = new Properties();
chris@0:   
chris@0:   private static Config instance = null;
chris@0:   
chris@0:   static
chris@0:   {
chris@0:     // Set some default values
chris@0:     defaultConfig.setProperty("n3tpd.article.lifetime", "300"); // 300 days
chris@0:     defaultConfig.setProperty("n3tpd.article.maxsize", "100");  // 100 kbyte
chris@0:     defaultConfig.setProperty("n3tpd.port", "119");
chris@0:     defaultConfig.setProperty("n3tpd.auxport", "8080");
chris@0:     defaultConfig.setProperty("n3tpd.server.backlog", "10");
chris@0:     defaultConfig.setProperty("n3tpd.hostname", "localhost");
chris@0:     defaultConfig.setProperty("n3tpd.storage.database", "jdbc:mysql://localhost/n3tpd_data");
chris@0:     defaultConfig.setProperty("n3tpd.storage.dbmsdriver", "com.mysql.jdbc.Driver");
chris@0:     defaultConfig.setProperty("n3tpd.storage.user", "n3tpd_user");
chris@0:     defaultConfig.setProperty("n3tpd.storage.password", "mysecret");
chris@0:     
chris@0:     instance = new Config();
chris@0:   }
chris@0:   
chris@0:   /**
chris@0:    * @return A Config instance
chris@0:    */
chris@0:   public static Config getInstance()
chris@0:   {
chris@0:     return instance;
chris@0:   }
chris@0: 
chris@0:   // Every config instance is initialized with the default values.
chris@0:   private Properties settings = (Properties)defaultConfig.clone();
chris@0: 
chris@0:   /**
chris@0:    * Config is a singelton class with only one instance at time.
chris@0:    * So the constructor is private to prevent the creation of more
chris@0:    * then one Config instance.
chris@0:    * @see Config.getInstance() to retrieve an instance of Config
chris@0:    */
chris@0:   private Config()
chris@0:   {
chris@0:     try
chris@0:     {
chris@0:       // Load settings from file
chris@0:       load();
chris@0:     }
chris@0:     catch(IOException e)
chris@0:     {
chris@0:       e.printStackTrace();
chris@0:     }
chris@0:   }
chris@0: 
chris@0:   /**
chris@0:    * Loads the configuration from the config file. By default this is done
chris@0:    * by the (private) constructor but it can be useful to reload the config
chris@0:    * by invoking this method.
chris@0:    * @throws IOException
chris@0:    */
chris@0:   public void load() throws IOException
chris@0:   {
chris@0:     try
chris@0:     {
chris@0:       settings.load(new FileInputStream(FILE));
chris@0:     }
chris@0:     catch (FileNotFoundException e)
chris@0:     {
chris@0:       save();
chris@0:     }
chris@0:   }
chris@0: 
chris@0:   /**
chris@0:    * Saves this Config to the config file. By default this is done
chris@0:    * at program end.
chris@0:    * @throws FileNotFoundException
chris@0:    * @throws IOException
chris@0:    */
chris@0:   public void save() throws FileNotFoundException, IOException
chris@0:   {
chris@0:     settings.store(new FileOutputStream(FILE), "N3TPD Config File");
chris@0:   }
chris@0:   
chris@0:   /**
chris@0:    * Returns the value that is stored within this config
chris@0:    * identified by the given key. If the key cannot be found
chris@0:    * the default value is returned.
chris@0:    * @param key Key to identify the value.
chris@0:    * @param def The default value that is returned if the key
chris@0:    * is not found in this Config.
chris@0:    * @return
chris@0:    */
chris@0:   public String get(String key, String def)
chris@0:   {
chris@0:     return settings.getProperty(key, def);
chris@0:   }
chris@0: 
chris@0:   /**
chris@0:    * Returns the value that is stored within this config
chris@0:    * identified by the given key. If the key cannot be found
chris@0:    * the default value is returned.
chris@0:    * @param key Key to identify the value.
chris@0:    * @param def The default value that is returned if the key
chris@0:    * is not found in this Config.
chris@0:    * @return
chris@0:    */
chris@0:   public int get(String key, int def)
chris@0:   {
chris@0:     try
chris@0:     {
chris@0:       String val = get(key);
chris@0:       return Integer.parseInt(val);
chris@0:     }
chris@0:     catch(Exception e)
chris@0:     {
chris@0:       return def;
chris@0:     }
chris@0:   }
chris@0:   
chris@0:   /**
chris@0:    * Returns the value that is stored within this config
chris@0:    * identified by the given key. If the key cannot be found
chris@0:    * the default value is returned.
chris@0:    * @param key Key to identify the value.
chris@0:    * @param def The default value that is returned if the key
chris@0:    * is not found in this Config.
chris@0:    * @return
chris@0:    */
chris@0:   public long get(String key, long def)
chris@0:   {
chris@0:     try
chris@0:     {
chris@0:       String val = get(key);
chris@0:       return Long.parseLong(val);
chris@0:     }
chris@0:     catch(Exception e)
chris@0:     {
chris@0:       return def;
chris@0:     }
chris@0:   }
chris@0: 
chris@0:   /**
chris@0:    * Returns the value for the given key or null if the
chris@0:    * key is not found in this Config.
chris@0:    * @param key
chris@0:    * @return
chris@0:    */
chris@0:   private String get(String key)
chris@0:   {
chris@0:     return settings.getProperty(key);
chris@0:   }
chris@0: 
chris@0:   /**
chris@0:    * Sets the value for a given key.
chris@0:    * @param key
chris@0:    * @param value
chris@0:    */
chris@0:   public void set(String key, String value)
chris@0:   {
chris@0:     settings.setProperty(key, value);
chris@0:   }
chris@0: 
chris@0: }