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The modules contains the core implementation code of Fluo.

There is a newer version: 1.0.0-beta-2

/*
 * Copyright 2014 Fluo authors (see AUTHORS)
 *
 * 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.fluo.core.util;

import org.apache.accumulo.core.util.Daemon;
import org.apache.accumulo.core.util.UtilWaitThread;
import org.apache.log4j.Logger;

public class Halt {
  static private final Logger log = Logger.getLogger(Halt.class);

  private Halt() {}

  public static void halt(final String msg) {
    halt(0, new Runnable() {
      @Override
      public void run() {
        log.fatal(msg);
      }
    });
  }

  public static void halt(final String msg, int status) {
    halt(status, new Runnable() {
      @Override
      public void run() {
        log.fatal(msg);
      }
    });
  }

  public static void halt(final int status, Runnable runnable) {
    try {
      // give ourselves a little time to try and do something
      new Daemon() {
        @Override
        public void run() {
          UtilWaitThread.sleep(100);
          Runtime.getRuntime().halt(status);
        }
      }.start();

      if (runnable != null)
        runnable.run();
      Runtime.getRuntime().halt(status);
    } finally {
      // In case something else decides to throw a Runtime exception
      Runtime.getRuntime().halt(-1);
    }
  }

}