/*
 *  Copyright (c) 2007, 2018, Oracle and/or its affiliates. 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.  Oracle designates this
 *  particular file as subject to the "Classpath" exception as provided
 *  by Oracle in the LICENSE file that accompanied this code.
 *
 *  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
 *  questions.
 */

package org.graalvm.visualvm.modules.tracer.dtrace;

import org.graalvm.visualvm.modules.tracer.TracerSupport;
import org.openide.modules.ModuleInstall;

/**
 * Manages a module's lifecycle. Remember that an installer is optional and
 * often not needed at all.
 *
 * @author Tomas Hurka
 */
public class Installer extends ModuleInstall {

    DTracePackageProvider provider;

    @Override
    public void restored() {
        assert provider == null;
        provider = new DTracePackageProvider();
        TracerSupport.getInstance().registerPackageProvider(provider);
    }

    @Override
    public void uninstalled() {
        assert provider != null;
        TracerSupport.getInstance().unregisterPackageProvider(provider);
        provider = null;
    }

}
