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CoreLogPruningStrategy.java
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CoreLogPruningStrategy.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.coreedge.raft.log.segmented;
public interface CoreLogPruningStrategy
{
/**
* Returns the index to keep depending on the configuration strategy.
* This does not factor in the value of the safe index to prune to.
*
* It is worth noting that the returned value may be the first available value,
* rather than the first possible value. This signifies that no pruning is needed.
* @param segments
* @return The lowest index the pruning configuration allows to keep. It is a value in the same range as
* append indexes, starting from -1 all the way to {@link Long#MAX_VALUE}.
*/
long getIndexToKeep( Segments segments );
}