content: /*
   * 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 accord.coordinate.tracking;
  
  import accord.coordinate.tracking.FastPathTracker.FastPathShardTracker;
  import accord.primitives.TxnId;
  import accord.utils.RandomSource;
  import accord.local.Node;
  import accord.topology.Topologies;
  import org.junit.jupiter.api.Assertions;
  
  import java.util.ArrayList;
  
  public class FastPathTrackerReconciler extends TrackerReconciler<FastPathShardTracker, FastPathTracker, FastPathTrackerReconciler.Rsp>
  {
      enum Rsp { FAST, SLOW, DELAY, FAIL }
  
      FastPathTrackerReconciler(RandomSource random, Topologies topologies)
      {
          this(random, new FastPathTracker(topologies, TxnId.NONE));
      }
  
      private FastPathTrackerReconciler(RandomSource random, FastPathTracker tracker)
      {
          super(random, Rsp.class, tracker, new ArrayList<>(tracker.nodes()));
      }
  
      @Override
      RequestStatus invoke(Rsp event, FastPathTracker tracker, Node.Id from)
      {
          switch (event)
          {
              default: throw new AssertionError();
              case FAST: inflight.remove(from); return tracker.recordSuccess(from, true);
              case SLOW: inflight.remove(from); return tracker.recordSuccess(from, false);
              case DELAY: return tracker.recordDelayed(from);
              case FAIL: inflight.remove(from); return tracker.recordFailure(from);
          }
      }
  
      @Override
      void validate(RequestStatus status)
      {
          switch (status)
          {
              case Failed:
                  Assertions.assertTrue(tracker.any(FastPathShardTracker::hasFailed));
                  Assertions.assertFalse(tracker.all(FastPathShardTracker::hasReachedQuorum));
                  break;
  
              case Success:
                  Assertions.assertTrue(tracker.all(FastPathShardTracker::hasReachedQuorum));
                  Assertions.assertTrue(tracker.all(shard -> shard.hasRejectedFastPath() || shard.hasMetFastPathCriteria() || shard.fastPathIsDelayed()));
                  Assertions.assertFalse(tracker.any(FastPathShardTracker::hasFailed));
                  break;
  
              case NoChange:
                  Assertions.assertFalse(tracker.all(FastPathShardTracker::hasMetFastPathCriteria));
                  Assertions.assertFalse(tracker.all(shard -> shard.hasRejectedFastPath() || shard.hasMetFastPathCriteria() || shard.fastPathIsDelayed()) && tracker.all(FastPathShardTracker::hasReachedQuorum));
                  Assertions.assertFalse(tracker.any(FastPathShardTracker::hasFailed));
          }
      }
  }
  