org.neo4j.kernel.info.JvmChecker Maven / Gradle / Ivy

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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 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.info;

import org.neo4j.logging.Log;

public class JvmChecker
{
    public static final String INCOMPATIBLE_JVM_WARNING = "You are using an unsupported Java runtime. Please" +
            " use Oracle(R) Java(TM) Runtime Environment 8 or OpenJDK(TM) 8.";
    public static final String INCOMPATIBLE_JVM_VERSION_WARNING = "You are using an unsupported version of " +
            "the Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 8 or OpenJDK(TM) 8.";

    private final Log log;
    private final JvmMetadataRepository jvmMetadataRepository;

    public JvmChecker( Log log, JvmMetadataRepository jvmMetadataRepository )
    {
        this.log = log;
        this.jvmMetadataRepository = jvmMetadataRepository;
    }

    public void checkJvmCompatibilityAndIssueWarning()
    {
        String javaVmName = jvmMetadataRepository.getJavaVmName();
        String javaVersion = jvmMetadataRepository.getJavaVersion();

        if ( !javaVmName.matches( "(Java HotSpot\\(TM\\)|OpenJDK) (64-Bit Server|Server|Client) VM" ) )
        {
            log.warn( INCOMPATIBLE_JVM_WARNING );
        }
        else if ( !javaVersion.matches( "^1\\.[8].*" ) )
        {
            log.warn( INCOMPATIBLE_JVM_VERSION_WARNING );
        }
    }
}