org.neo4j.kernel.api.labelscan.LoggingMonitor Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ongdb-kernel Show documentation

ONgDB kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see https://graphfoundation.org.

There is a newer version: 3.6.2

Show newest version

/*
 * Copyright (c) 2018-2020 "Graph Foundation,"
 * Graph Foundation, Inc. [https://graphfoundation.org]
 *
 * This file is part of ONgDB.
 *
 * ONgDB 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 .
 */
/*
 * 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.kernel.api.labelscan;

import org.apache.commons.lang3.exception.ExceptionUtils;

import java.util.StringJoiner;

import org.neo4j.kernel.api.labelscan.LabelScanStore.Monitor;
import org.neo4j.logging.Log;

import static org.neo4j.helpers.Format.duration;

/**
 * Logs about important events about {@link LabelScanStore} {@link Monitor}.
 */
public class LoggingMonitor extends Monitor.Adaptor
{
    private final Log log;

    public LoggingMonitor( Log log )
    {
        this.log = log;
    }

    @Override
    public void noIndex()
    {
        log.info( "No label index found, this might just be first use. Preparing to rebuild." );
    }

    @Override
    public void notValidIndex()
    {
        log.warn( "Label index could not be read. Preparing to rebuild." );
    }

    @Override
    public void rebuilding()
    {
        log.info( "Rebuilding label index, this may take a while" );
    }

    @Override
    public void rebuilt( long roughNodeCount )
    {
        log.info( "Label index rebuilt (roughly " + roughNodeCount + " nodes)" );
    }

    @Override
    public void recoveryCleanupRegistered()
    {
        log.info( "Label index cleanup job registered" );
    }

    @Override
    public void recoveryCleanupStarted()
    {
        log.info( "Label index cleanup job started" );
    }

    @Override
    public void recoveryCleanupFinished( long numberOfPagesVisited, long numberOfCleanedCrashPointers, long durationMillis )
    {
        StringJoiner joiner = new StringJoiner( ", ", "Label index cleanup job finished: ", "" );
        joiner.add( "Number of pages visited: " + numberOfPagesVisited );
        joiner.add( "Number of cleaned crashed pointers: " + numberOfCleanedCrashPointers );
        joiner.add( "Time spent: " + duration( durationMillis ) );
        log.info( joiner.toString() );
    }

    @Override
    public void recoveryCleanupClosed()
    {
        log.info( "Label index cleanup job closed" );
    }

    @Override
    public void recoveryCleanupFailed( Throwable throwable )
    {
        log.info( String.format( "Label index cleanup job failed.%nCaused by: %s", ExceptionUtils.getStackTrace( throwable ) ) );
    }
}