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  * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
  * Use is subject to license terms.
  * JBoss, Home of Professional Open Source
  * Copyright 2010, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.jboss.weld.bootstrap.api;

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

Pete Muir
See also:
public interface Singleton<T> {
Access the singleton

a singleton object
java.lang.IllegalStateException if the singleton is not set
    T get(String id);

Check if the singleton is set

true if the singleton is set
    boolean isSet(String id);

Store a singleton

object the object to store
    void set(String id, T object);

Clear the singleton
    void clear(String id);
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