/*
 * 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.cache;


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

/**
 * For testing purposes only, observers events in the disk store.
 *
 */
public abstract class DiskStoreObserver {

  @MutableForTesting
  private static DiskStoreObserver INSTANCE = null;

  public static void setInstance(DiskStoreObserver observer) {
    INSTANCE = observer;
  }

  public void beforeAsyncValueRecovery(DiskStoreImpl store) {

  }

  public void afterAsyncValueRecovery(DiskStoreImpl store) {

  }

  public void afterWriteGCRVV(DiskRegion dr) {}


  static void startAsyncValueRecovery(DiskStoreImpl store) {
    if (INSTANCE != null) {
      INSTANCE.beforeAsyncValueRecovery(store);
    }
  }

  static void endAsyncValueRecovery(DiskStoreImpl store) {
    if (INSTANCE != null) {
      INSTANCE.afterAsyncValueRecovery(store);
    }
  }

  public static void endWriteGCRVV(DiskRegion dr) {
    if (INSTANCE != null) {
      INSTANCE.afterWriteGCRVV(dr);
    }
  }
}