Package org.apache.hadoop.conf

Interface Reconfigurable

All Superinterfaces:
Configurable
All Known Implementing Classes:
ReconfigurableBase
public interface Reconfigurable extends Configurable
Something whose Configuration can be changed at run time.

  • Method Details

    • reconfigureProperty

      void reconfigureProperty(String property, String newVal) throws ReconfigurationException
      Change a configuration property on this object to the value specified. Change a configuration property on this object to the value specified and return the previous value that the configuration property was set to (or null if it was not previously set). If newVal is null, set the property to its default value;
      Parameters:
      property - property name.
      newVal - new value.
      Throws:
      ReconfigurationException - if there was an error applying newVal. If the property cannot be changed, throw a ReconfigurationException.

    • isPropertyReconfigurable

      boolean isPropertyReconfigurable(String property)
      Return whether a given property is changeable at run time. If isPropertyReconfigurable returns true for a property, then changeConf should not throw an exception when changing this property.
      Parameters:
      property - property name.
      Returns:
      true if property reconfigurable; false if not.

    • getReconfigurableProperties

      Collection<String> getReconfigurableProperties()
      Return all the properties that can be changed at run time.
      Returns:
      reconfigurable propertys.