com.sun.enterprise.config.serverbeans.SecureAdminHelperHolder Maven / Gradle / Ivy
/*
* Copyright (c) 2023 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.enterprise.config.serverbeans;
import org.glassfish.hk2.api.ServiceLocator;
final class SecureAdminHelperHolder {
private static final Object lock = new Object();
private static volatile SecureAdminHelper secureAdminHelper;
private SecureAdminHelperHolder() {
throw new AssertionError();
}
public static SecureAdminHelper getSecureAdminHelper(ServiceLocator habitat) {
// Double-checked locking
SecureAdminHelper localHelper = secureAdminHelper;
if (localHelper == null) {
synchronized (lock) {
localHelper = secureAdminHelper;
if (localHelper == null) {
secureAdminHelper = localHelper = habitat.getService(SecureAdminHelper.class);
}
}
}
return localHelper;
}
}