chris@3: /*
chris@3:  *   SONEWS News Server
chris@3:  *   see AUTHORS for the list of contributors
chris@3:  *
chris@3:  *   This program is free software: you can redistribute it and/or modify
chris@3:  *   it under the terms of the GNU General Public License as published by
chris@3:  *   the Free Software Foundation, either version 3 of the License, or
chris@3:  *   (at your option) any later version.
chris@3:  *
chris@3:  *   This program is distributed in the hope that it will be useful,
chris@3:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
chris@3:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
chris@3:  *   GNU General Public License for more details.
chris@3:  *
chris@3:  *   You should have received a copy of the GNU General Public License
chris@3:  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
chris@3:  */
chris@3: 
chris@3: package org.sonews.config;
chris@3: 
chris@3: import org.sonews.util.Log;
chris@3: import org.sonews.storage.StorageBackendException;
chris@3: import org.sonews.storage.StorageManager;
chris@3: import org.sonews.util.TimeoutMap;
chris@3: 
chris@3: /**
chris@3:  * Provides access to the program wide configuration that is stored within
chris@3:  * the server's database.
chris@3:  * @author Christian Lins
chris@3:  * @since sonews/0.5.0
chris@3:  */
chris@3: class BackendConfig extends AbstractConfig
chris@3: {
chris@3: 
chris@3:   private static BackendConfig instance = new BackendConfig();
chris@3:   
chris@3:   public static BackendConfig getInstance()
chris@3:   {
chris@3:     return instance;
chris@3:   }
chris@3:   
chris@3:   private final TimeoutMap<String, String> values 
chris@3:     = new TimeoutMap<String, String>();
chris@3:   
chris@3:   private BackendConfig()
chris@3:   {
chris@3:     super();
chris@3:   }
chris@3:   
chris@3:   /**
chris@3:    * Returns the config value for the given key or the defaultValue if the
chris@3:    * key is not found in config.
chris@3:    * @param key
chris@3:    * @param defaultValue
chris@3:    * @return
chris@3:    */
chris@3:   @Override
chris@3:   public String get(String key, String defaultValue)
chris@3:   {
chris@3:     try
chris@3:     {
chris@3:       String configValue = values.get(key);
chris@3:       if(configValue == null)
chris@3:       {
chris@3:         configValue = StorageManager.current().getConfigValue(key);
chris@3:         if(configValue == null)
chris@3:         {
chris@3:           return defaultValue;
chris@3:         }
chris@3:         else
chris@3:         {
chris@3:           values.put(key, configValue);
chris@3:           return configValue;
chris@3:         }
chris@3:       }
chris@3:       else
chris@3:       {
chris@3:         return configValue;
chris@3:       }
chris@3:     }
chris@3:     catch(StorageBackendException ex)
chris@3:     {
chris@3:       Log.msg(ex.getMessage(), false);
chris@3:       return defaultValue;
chris@3:     }
chris@3:   }
chris@3:   
chris@3:   /**
chris@3:    * Sets the config value which is identified by the given key.
chris@3:    * @param key
chris@3:    * @param value
chris@3:    */
chris@3:   public void set(String key, String value)
chris@3:   {
chris@3:     values.put(key, value);
chris@3:     
chris@3:     try
chris@3:     {
chris@3:       // Write values to database
chris@3:       StorageManager.current().setConfigValue(key, value);
chris@3:     }
chris@3:     catch(StorageBackendException ex)
chris@3:     {
chris@3:       ex.printStackTrace();
chris@3:     }
chris@3:   }
chris@3:   
chris@3: }