Interface ServiceSelector

Method Details

• select

  Object select(Object policy) throws ServiceException

  Select the Object associated with the given policy. For instance, If the ServiceSelector has a Generator stored and referenced by a URL, the following call could be used:

   try
   {
       Generator input;
       input = (Generator)selector.select( new URL("foo://demo/url") );
   }
   catch (...)
   {
       ...
   }
   

  Parameters:

  policy - A criteria against which a Object is selected.

  Returns:

  an Object value

  Throws:

  ServiceException - If the requested Object cannot be supplied

• isSelectable

  boolean isSelectable(Object policy)

  Check to see if a Object exists relative to the supplied policy.

  Parameters:

  policy - a Object containing the selection criteria

  Returns:

  True if the component is available, False if it not.

• release

  void release(Object object)

  Return the Object when you are finished with it. This allows the ServiceSelector to handle the End-Of-Life Lifecycle events associated with the Object. Please note, that no Exception should be thrown at this point. This is to allow easy use of the ServiceSelector system without having to trap Exceptions on a release.

  Parameters:

  object - The Object we are releasing, may also be a null reference