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IdAllocationState.java
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IdAllocationState.java
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/*
* Copyright (c) 2002-2015 "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.replication.id;
import org.neo4j.kernel.IdType;
public interface IdAllocationState
{
/**
*
* @param idType the type of graph object whose ID is under allocation
* @return the first unallocated entry for idType
*/
long firstUnallocated( IdType idType );
/**
*
* @param idType the type of graph object whose ID is under allocation
* @param idRangeEnd the first unallocated entry for idType
*/
void firstUnallocated( IdType idType, long idRangeEnd );
/**
*
* @param idType The type of graph object whose ID is under allocation
* @return start position of allocation
*/
long lastIdRangeStart( IdType idType );
/**
*
* @param idType The type of graph object whose ID is under allocation
* @param idRangeStart start position of allocation
*/
void lastIdRangeStart( IdType idType, long idRangeStart );
/**
*
* @param idType The type of graph object whose ID is under allocation
* @return the length of the last ID range allocated
*/
int lastIdRangeLength( IdType idType );
/**
*
* @param idType The type of graph object whose ID is under allocation
* @param idRangeLength the length of the ID range to be allocated
*/
void lastIdRangeLength( IdType idType, int idRangeLength );
/**
* @return The last set log index, which is the value last passed to {@link #logIndex(long)}
*/
long logIndex();
/**
* Sets the last seen log index, which is the last log index at which a replicated value that updated this state
* was encountered.
* @param logIndex The value to set as the last log index at which this state was updated
*/
void logIndex( long logIndex );
}