Settings.java

/*
 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2020 SAP SE. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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import sun.hotspot.WhiteBox;

public final class Settings {

    public String reclaimPolicy = WhiteBox.getWhiteBox().getStringVMFlag("MetaspaceReclaimPolicy");
    public boolean usesAllocationGuards = WhiteBox.getWhiteBox().getBooleanVMFlag("MetaspaceGuardAllocations");

    final public boolean doesReclaim() {
        return reclaimPolicy.equals("balanced") || reclaimPolicy.equals("aggessive");
    }

    final static long rootChunkWordSize = 512 * 1024;

    static Settings theSettings;

    static Settings settings()  {
       if (theSettings == null) {
            theSettings = new Settings();
       }
       return theSettings;
    }

}