org.smallmind.nutsnbolts.spring.remote.RMIDaemonInitializingBean Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of smallmind-nutsnbolts Show documentation
Nuts'n'Bolts Utilities
There is a newer version: 6.3.0
/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 David Berkman
 * 
 * This file is part of the SmallMind Code Project.
 * 
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 * 
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 * 
 * ...or...
 * 
 * 2) The terms of the Apache License, Version 2.0.
 * 
 * The SmallMind Code Project 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 or Apache License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 * 
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.nutsnbolts.spring.remote;

import java.io.IOException;
import java.rmi.RemoteException;
import java.rmi.activation.ActivationException;
import java.rmi.activation.ActivationGroup;
import java.rmi.activation.ActivationSystem;
import java.util.concurrent.atomic.AtomicBoolean;
import org.springframework.beans.factory.InitializingBean;

public class RMIDaemonInitializingBean implements InitializingBean {

  private AtomicBoolean stopped = new AtomicBoolean(false);
  private ActivationSystem activationSystem;
  private long retryDelayMilliseconds;
  private int maxAttempts;

  public void setMaxAttempts (int maxAttempts) {

    this.maxAttempts = maxAttempts;
  }

  public void setRetryDelayMilliseconds (long retryDelayMilliseconds) {

    this.retryDelayMilliseconds = retryDelayMilliseconds;
  }

  @Override
  public void afterPropertiesSet ()
    throws IOException, InterruptedException {

    int retryCount = 0;

    do {
      try {
        activationSystem = ActivationGroup.getSystem();
      }
      catch (ActivationException a) {
        if (retryCount++ == maxAttempts) {
          throw new IOException("Unable to bind the rmi daemon");
        }

        Runtime.getRuntime().exec("rmid");
        Thread.sleep(retryDelayMilliseconds);
      }
    } while (activationSystem == null);
  }

  public void stop ()
    throws RemoteException {

    if ((activationSystem != null) && stopped.compareAndSet(false, true)) {
      activationSystem.shutdown();
    }
  }
}