geode-core/src/main/java/org/apache/geode/internal/cache/versions/VersionHolder.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.cache.versions;

/**
 * Read only interface for an object that holds an entry version.
 *
 * @param <T>
 */
public interface VersionHolder<T extends VersionSource> {
  /**
   * @return the current version number for the corresponding entry
   */
  int getEntryVersion();

  /**
   * @return the region version number for the last modification
   */
  long getRegionVersion();

  /**
   * @return the time stamp of the operation
   */
  long getVersionTimeStamp();

  /**
   * @return the ID of the member that last changed the corresponding entry
   */
  T getMemberID();

  /**
   * @return the Distributed System Id of the system that last changed the corresponding entry
   */
  int getDistributedSystemId();

  /** get rvv internal high byte. Used by region entries for transferring to storage */
  short getRegionVersionHighBytes();

  /** get rvv internal low bytes. Used by region entries for transferring to storage */
  int getRegionVersionLowBytes();

}