org.jboss.weld.bootstrap.api.helpers.IsolatedStaticSingletonProvider Maven / Gradle / Ivy
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*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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* 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.
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* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package org.jboss.weld.bootstrap.api.helpers;
import org.jboss.weld.bootstrap.api.Singleton;
import org.jboss.weld.bootstrap.api.SingletonProvider;
/**
*
* A singleton provider that assumes an isolated classloder per application
*
* @author [email protected]
* @author Pete Muir
*/
public class IsolatedStaticSingletonProvider extends SingletonProvider {
@Override
public Singleton create(Class type) {
return new IsolatedStaticSingleton();
}
private static class IsolatedStaticSingleton implements Singleton {
private T object;
public T get(String id) {
if (object == null) {
throw new IllegalStateException("Singleton is not set. Is your Thread.currentThread().getContextClassLoader() set correctly?");
}
return object;
}
public void set(String id, T object) {
this.object = object;
}
public void clear(String id) {
this.object = null;
}
public boolean isSet(String id) {
return object != null;
}
}
}