Interface ServiceSelector

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      boolean isSelectable​(java.lang.Object policy)
      Check to see if a Object exists relative to the supplied policy.
      void release​(java.lang.Object object)
      Return the Object when you are finished with it.
      java.lang.Object select​(java.lang.Object policy)
      Select the Object associated with the given policy.
    • Method Detail

      • select

        java.lang.Object select​(java.lang.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​(java.lang.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​(java.lang.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.