geode-core/src/main/java/org/apache/geode/internal/process/StartupStatusListenerRegistry.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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.apache.geode.internal.process;

import java.util.concurrent.atomic.AtomicReference;

import org.apache.geode.annotations.internal.MakeNotStatic;

public class StartupStatusListenerRegistry {

  @MakeNotStatic
  private static final AtomicReference<StartupStatusListener> listener = new AtomicReference<>();

  private StartupStatusListenerRegistry() {
    // do nothing
  }

  public static void setListener(StartupStatusListener listener) {
    StartupStatusListenerRegistry.listener.set(listener);
  }

  static StartupStatusListener getStartupListener() {
    return listener.get();
  }

  static void clearListener() {
    listener.set(null);
  }
}