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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,
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   * See the License for the specific language governing permissions and
   * limitations under the License.
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  package org.apache.cassandra.service.accord;
  
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.function.Function;
  
  import org.junit.Test;
  
  import org.apache.cassandra.concurrent.ExecutorPlus;
  import org.apache.cassandra.utils.concurrent.Semaphore;
  import org.apache.cassandra.utils.concurrent.UncheckedInterruptedException;
  
  import static org.apache.cassandra.concurrent.ExecutorFactory.Global.executorFactory;
  
  public class AccordExecutorBurnTest
  {
      static class State
      {
          final AccordExecutor executor;
          final AccordCommandStore[] commandStores;
          final ExecutorPlus loadGen;
          final int generators;
          final int targetCount;
          final Semaphore permits;
          final AtomicInteger submitted = new AtomicInteger();
          final AtomicInteger completed = new AtomicInteger();
  
          State(AccordExecutor executor, Function<AccordExecutor, AccordCommandStore> storeFactory,
                int taskCount, int concurrency, int generators, int commandStores)
          {
              this.executor = executor;
              this.targetCount = taskCount;
              this.permits = Semaphore.newSemaphore(concurrency);
              this.generators = generators;
              this.loadGen = executorFactory().pooled("loadgen", generators);
              this.commandStores = new AccordCommandStore[commandStores];
              for (int i = 0 ; i < commandStores ; ++i)
                  this.commandStores[i] = storeFactory.apply(executor);
          }
  
          void start()
          {
              for (int i = 0 ; i < generators ; ++i)
                  loadGen.execute(this::run);
          }
  
          void run()
          {
              while (true)
              {
                  int slot = submitted.get();
                  if (slot >= targetCount)
                      return;
                  if (!submitted.compareAndSet(slot, slot + 1))
                      continue;
  
                  try { permits.acquire(1); }
                  catch (InterruptedException e) { throw new UncheckedInterruptedException(e); }
                  submitSomething();
              }
          }
  
          private void submitSomething()
          {
          }
      }
  
      @Test
      public void test()
      {
  
      }
  
  }
  