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An implementation of java.util.logging.LogManager

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/*
 * JBoss, Home of Professional Open Source.
 *
 * Copyright 2023 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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
 *
 *     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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jboss.logmanager.configuration;

import java.util.concurrent.atomic.AtomicReference;

/**
 * @author James R. Perkins
 */
class ConstantConfigurationResource implements ConfigurationResource {
    private AtomicReference instance;

    ConstantConfigurationResource(final T instance) {
        this.instance = new AtomicReference<>(instance);
    }

    @Override
    public T get() {
        return instance.get();
    }

    @Override
    public void close() throws Exception {
        final T instance = this.instance.getAndSet(null);
        if (instance instanceof AutoCloseable) {
            ((AutoCloseable) instance).close();
        }
    }
}