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RealmsManagerHolder.java
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RealmsManagerHolder.java
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/*
* Copyright (c) 2022, 2023 Contributors to the Eclipse Foundation.
* Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
*
* 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.security.auth.realm;
import java.lang.ref.WeakReference;
import org.glassfish.internal.api.Globals;
public class RealmsManagerHolder {
private static WeakReference<RealmsManager> realmsManagerReference = new WeakReference<RealmsManager>(null);
static RealmsManager getNonNullRealmsManager() {
RealmsManager realmsManager = getRealmsManager();
if (realmsManager == null) {
throw new RuntimeException("Unable to locate RealmsManager Service");
}
return realmsManager;
}
static RealmsManager getRealmsManager() {
if (realmsManagerReference.get() != null) {
return realmsManagerReference.get();
}
return _getRealmsManager();
}
static synchronized RealmsManager _getRealmsManager() {
if (realmsManagerReference.get() == null) {
if (Globals.getDefaultHabitat() == null) {
return null;
}
realmsManagerReference = new WeakReference<>(Globals.get(RealmsManager.class));
}
return realmsManagerReference.get();
}
}