Package org.jboss.weld.bootstrap.api

Interface Singleton<T>

public interface Singleton<T>
Holds a reference to an application singleton. This singleton is used internally by Weld to store various application scoped objects. This allows Weld to operate as a shared library. In a shared mode, the same instance of Weld implementation is used by all the applications in a server environment. In the exclusive mode, each application loads a separate copy of Weld implementation at the application level. Alternative implementations of Singleton can be used as required
Author:
Sanjeeb.Sahoo@Sun.COM, Pete Muir
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    clear(String id)
    Clear the singleton
    T
    get(String id)
    Access the singleton
    boolean
    isSet(String id)
    Check if the singleton is set
    void
    set(String id, T object)
    Store a singleton

  • Method Details

    • get

      T get(String id)
      Access the singleton
      Parameters:
      id - singleton identifier
      Returns:
      a singleton object
      Throws:
      IllegalStateException - if the singleton is not set

    • isSet

      boolean isSet(String id)
      Check if the singleton is set
      Parameters:
      id - singleton identifier
      Returns:
      true if the singleton is set

    • set

      void set(String id, T object)
      Store a singleton
      Parameters:
      id - singleton identifier
      object - the object to store

    • clear

      void clear(String id)
      Clear the singleton
      Parameters:
      id - singleton identifier