1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/org/sonews/config/BackendConfig.java	Sun Aug 29 17:43:58 2010 +0200
     1.3 @@ -0,0 +1,115 @@
     1.4 +/*
     1.5 + *   SONEWS News Server
     1.6 + *   see AUTHORS for the list of contributors
     1.7 + *
     1.8 + *   This program is free software: you can redistribute it and/or modify
     1.9 + *   it under the terms of the GNU General Public License as published by
    1.10 + *   the Free Software Foundation, either version 3 of the License, or
    1.11 + *   (at your option) any later version.
    1.12 + *
    1.13 + *   This program is distributed in the hope that it will be useful,
    1.14 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 + *   GNU General Public License for more details.
    1.17 + *
    1.18 + *   You should have received a copy of the GNU General Public License
    1.19 + *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 + */
    1.21 +
    1.22 +package org.sonews.config;
    1.23 +
    1.24 +import java.util.logging.Level;
    1.25 +import org.sonews.util.Log;
    1.26 +import org.sonews.storage.StorageBackendException;
    1.27 +import org.sonews.storage.StorageManager;
    1.28 +import org.sonews.util.TimeoutMap;
    1.29 +
    1.30 +/**
    1.31 + * Provides access to the program wide configuration that is stored within
    1.32 + * the server's database.
    1.33 + * @author Christian Lins
    1.34 + * @since sonews/0.5.0
    1.35 + */
    1.36 +class BackendConfig extends AbstractConfig
    1.37 +{
    1.38 +
    1.39 +  private static BackendConfig instance = new BackendConfig();
    1.40 +  
    1.41 +  public static BackendConfig getInstance()
    1.42 +  {
    1.43 +    return instance;
    1.44 +  }
    1.45 +  
    1.46 +  private final TimeoutMap<String, String> values 
    1.47 +    = new TimeoutMap<String, String>();
    1.48 +  
    1.49 +  private BackendConfig()
    1.50 +  {
    1.51 +    super();
    1.52 +  }
    1.53 +  
    1.54 +  /**
    1.55 +   * Returns the config value for the given key or the defaultValue if the
    1.56 +   * key is not found in config.
    1.57 +   * @param key
    1.58 +   * @param defaultValue
    1.59 +   * @return
    1.60 +   */
    1.61 +  @Override
    1.62 +  public String get(String key, String defaultValue)
    1.63 +  {
    1.64 +    try
    1.65 +    {
    1.66 +      String configValue = values.get(key);
    1.67 +      if(configValue == null)
    1.68 +      {
    1.69 +        if(StorageManager.current() == null)
    1.70 +        {
    1.71 +          Log.get().warning("BackendConfig not available, using default.");
    1.72 +          return defaultValue;
    1.73 +        }
    1.74 +
    1.75 +        configValue = StorageManager.current().getConfigValue(key);
    1.76 +        if(configValue == null)
    1.77 +        {
    1.78 +          return defaultValue;
    1.79 +        }
    1.80 +        else
    1.81 +        {
    1.82 +          values.put(key, configValue);
    1.83 +          return configValue;
    1.84 +        }
    1.85 +      }
    1.86 +      else
    1.87 +      {
    1.88 +        return configValue;
    1.89 +      }
    1.90 +    }
    1.91 +    catch(StorageBackendException ex)
    1.92 +    {
    1.93 +      Log.get().log(Level.SEVERE, "Storage backend problem", ex);
    1.94 +      return defaultValue;
    1.95 +    }
    1.96 +  }
    1.97 +  
    1.98 +  /**
    1.99 +   * Sets the config value which is identified by the given key.
   1.100 +   * @param key
   1.101 +   * @param value
   1.102 +   */
   1.103 +  public void set(String key, String value)
   1.104 +  {
   1.105 +    values.put(key, value);
   1.106 +    
   1.107 +    try
   1.108 +    {
   1.109 +      // Write values to database
   1.110 +      StorageManager.current().setConfigValue(key, value);
   1.111 +    }
   1.112 +    catch(StorageBackendException ex)
   1.113 +    {
   1.114 +      ex.printStackTrace();
   1.115 +    }
   1.116 +  }
   1.117 +  
   1.118 +}