org.neo4j.consistency.statistics.AccessStatsKeepingStoreAccess Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of neo4j-consistency-check Show documentation

Tool for checking consistency of a Neo4j data store.

There is a newer version: 5.26.0

Show newest version

/*
 * Copyright (c) 2002-2020 "Neo4j,"
 * Neo4j Sweden AB [http://neo4j.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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.consistency.statistics;

import org.neo4j.consistency.statistics.AccessStatistics.AccessStats;
import org.neo4j.kernel.impl.store.NeoStores;
import org.neo4j.kernel.impl.store.RecordStore;
import org.neo4j.kernel.impl.store.StoreAccess;
import org.neo4j.kernel.impl.store.record.AbstractBaseRecord;
import org.neo4j.kernel.impl.store.record.RecordLoad;

/**
 * {@link StoreAccess} that decorates each store, feeding stats about access into {@link AccessStatistics}.
 */
public class AccessStatsKeepingStoreAccess extends StoreAccess
{
    private final AccessStatistics accessStatistics;

    public AccessStatsKeepingStoreAccess( NeoStores neoStore, AccessStatistics accessStatistics )
    {
        super( neoStore );
        this.accessStatistics = accessStatistics;
    }

    @Override
    protected  RecordStore wrapStore( RecordStore store )
    {
        AccessStats accessStats = new AccessStats( store.getClass().getSimpleName(), store.getRecordsPerPage() );
        accessStatistics.register( store, accessStats );
        return new AccessStatsKeepingRecordStore( store, accessStats );
    }

    private static class AccessStatsKeepingRecordStore
            extends RecordStore.Delegator
    {
        private final AccessStats accessStats;

        AccessStatsKeepingRecordStore( RecordStore actual, AccessStats accessStats )
        {
            super( actual );
            this.accessStats = accessStats;
        }

        protected AccessStats getAccessStats()
        {
            return accessStats;
        }

        @Override
        public RECORD getRecord( long id, RECORD record, RecordLoad load )
        {
            accessStats.upRead( id );
            return super.getRecord( id, record, load );
        }
    }
}