io.vlingo.xoom.cluster.ShutdownHook Maven / Gradle / Ivy

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// Copyright © 2012-2022 VLINGO LABS. All rights reserved.
//
// This Source Code Form is subject to the terms of the
// Mozilla Public License, v. 2.0. If a copy of the MPL
// was not distributed with this file, You can obtain
// one at https://mozilla.org/MPL/2.0/.

package io.vlingo.xoom.cluster;

import io.vlingo.xoom.actors.Logger;
import io.vlingo.xoom.cluster.model.ClusterControl;
import io.vlingo.xoom.common.Tuple2;

final class ShutdownHook {
  private final Tuple2 control;
  private final String nodeName;

  protected ShutdownHook(final String nodeName, final Tuple2 control) {
    this.nodeName = nodeName;
    this.control = control;
  }

  protected void register() {
    Runtime.getRuntime().addShutdownHook(new Thread(() -> {
      control._2.info("\n==========");
      control._2.info("Stopping node: '" + nodeName + "' ...");
      control._1.shutDown();
      pause();
      control._2.info("Stopped node: '" + nodeName + "'");
    }));
  }
  
  private void pause() {
    try {
      Thread.sleep(4000L);
    } catch (Exception e) {
      // ignore
    }
  }
}