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Runtime artifact for engineblock; This module ties the core libraries, provided drivers, and API into a single executable jar

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/*
*   Copyright 2015 jshook
*   Licensed under the Apache License, Version 2.0 (the "License");
*   you may not use this file except in compliance with the License.
*   You may obtain a copy of the License at
*
*       http://www.apache.org/licenses/LICENSE-2.0
*
*   Unless required by applicable law or agreed to in writing, software
*   distributed under the License is distributed on an "AS IS" BASIS,
*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*   See the License for the specific language governing permissions and
*   limitations under the License.
*/
package io.engineblock.core;

import io.engineblock.activityapi.core.Shutdownable;

import java.util.LinkedList;

/**
 * A simple callback handler for shutting down things gracefully.
 */
public class ShutdownManager {
    private ShutdownManager() {}
    private static ShutdownManager instance = new ShutdownManager();

    private final LinkedList managedInstances = new LinkedList<>();

    public static void register(Shutdownable managedInstance) {
        instance.managedInstances.add(managedInstance);
    }

    public static void shutdown() {
        instance.managedInstances.forEach(Shutdownable::shutdown);
    }
}