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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.activemq.artemis.utils.runnables;

import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
import java.util.function.Consumer;

public abstract class AtomicRunnable implements Runnable {

   public static AtomicRunnable checkAtomic(Runnable run) {
      if (run instanceof AtomicRunnable) {
         return (AtomicRunnable)run;
      } else {
         return new AtomicRunnableWithDelegate(run);
      }
   }

   private RunnableList acceptedList;
   private Consumer cancelTask;

   public RunnableList getAcceptedList() {
      return acceptedList;
   }

   public AtomicRunnable setAcceptedList(RunnableList acceptedList) {
      this.acceptedList = acceptedList;
      return this;
   }

   public Consumer getCancel() {
      return cancelTask;
   }

   public AtomicRunnable setCancel(Consumer cancelTask) {
      this.cancelTask = cancelTask;
      return this;
   }

   private volatile int ran;

   private static final AtomicIntegerFieldUpdater RAN_UPDATE =
      AtomicIntegerFieldUpdater.newUpdater(AtomicRunnable.class, "ran");

   public AtomicRunnable reset() {
      RAN_UPDATE.set(this, 0);
      return this;
   }

   public AtomicRunnable setRan() {
      RAN_UPDATE.set(this, 1);
      return this;
   }

   public boolean isRun() {
      return RAN_UPDATE.get(this) == 1;
   }

   @Override
   public void run() {
      if (RAN_UPDATE.compareAndSet(this, 0, 1)) {
         try {
            atomicRun();
         } finally {
            if (acceptedList != null) {
               acceptedList.remove(AtomicRunnable.this);
            }
         }
      }
   }

   public void cancel() {
      if (RAN_UPDATE.compareAndSet(this, 0, 1)) {
         if (cancelTask != null) {
            cancelTask.accept(AtomicRunnable.this);
         }
      }
   }

   public abstract void atomicRun();
}