Registry

•  OSGi Preferences service is embedded in kraken-core since 1.4.0
  • depends on apache felix prefs service 1.0.4
• See  OSGi Preferences Service by Example for details.

Console Commands

• registry.set [space] [path] [key] [value]
  • set string property
  • [space] can be "system" or user-defined name.
• registry.setInt [space] [path] [key] [value]
  • set integer property
• registry.setLong [space] [path] [key] [value]
  • set long property
• registry.setFloat [space] [path] [key] [value]
  • set float property
• registry.setDouble [space] [path] [key] [value]
  • set double property
• registry.print [space] [path] [key]
  • print value of property
• registry.flush [space] [path]
  • forces any change of the Preferences object to be saved in the persistent storage
• registry.sync [space] [path]
  • reload the content of the Preferences object from the persistent storage; before reloading, all the contents are saved

How to access registry programmatically

• You can get Preferences service reference by OSGi service lookup.

  ServiceReference ref = bc.getServiceReference(PreferencesService.class.getName());
  PreferencesService preferences = (PreferencesService) bc.getService(ref);
  

• To access the system root

  preferences.getSystemPreferences();
  

• To access a user root

  prefs = preferences.getUserPreferences(space);
  

• Store and retrieve value in Preferences

  public void put(String key, String value);
  
  public void putInt(String key, int value);
                     
  public void putLong(String key, long value);
                      
  public void putBoolean(String key, boolean value);
                         
  public void putFloat(String key, float value);
                       
  public void putDouble(String key, double value);
                        
  public void putByteArray(String key, byte[] value);
  

Example

kraken> registry.set system user name qoo
set space: system, path:user, key: name, value: foo
kraken> registry.print system user name
value: foo