/*
* 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.cassandra.db;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.utils.concurrent.OpOrder;
import org.apache.cassandra.utils.memory.AbstractAllocator;
import org.apache.cassandra.utils.memory.MemtableAllocator;
/**
* Alternative to Cell that have an expiring time.
* ExpiringCell is immutable (as Cell is).
*
* Note that ExpiringCell does not override Cell.getMarkedForDeleteAt,
* which means that it's in the somewhat unintuitive position of being deleted (after its expiration)
* without having a time-at-which-it-became-deleted. (Because ttl is a server-side measurement,
* we can't mix it with the timestamp field, which is client-supplied and whose resolution we
* can't assume anything about.)
*/
public interface ExpiringCell extends Cell
{
public static final int MAX_TTL = 20 * 365 * 24 * 60 * 60; // 20 years in seconds
public int getTimeToLive();
ExpiringCell localCopy(CFMetaData metadata, AbstractAllocator allocator);
ExpiringCell localCopy(CFMetaData metaData, MemtableAllocator allocator, OpOrder.Group opGroup);
}