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.messages;
  
  import javax.annotation.Nullable;
  
  import accord.local.Node;
  import accord.local.Node.Id;
  import accord.local.PreLoadContext;
  import accord.local.SafeCommandStore;
  import accord.primitives.Route;
  import accord.primitives.TxnId;
  import accord.topology.Topologies;
  import accord.utils.MapReduceConsume;
  import accord.utils.async.Cancellable;
  
  public abstract class RouteRequest<R extends Reply> extends ParticipantsRequest<Route<?>, R> implements Request, PreLoadContext, MapReduceConsume<SafeCommandStore, R>
  {
      public static abstract class WithUnsynced<R extends Reply> extends RouteRequest<R>
      {
          public final long minEpoch; // TODO (low priority, clarity): can this just always be TxnId.epoch?
  
          public WithUnsynced(Id to, Topologies topologies, TxnId txnId, Route<?> route)
          {
              this(to, topologies, txnId, route, latestRelevantEpochIndex(to, topologies, route));
          }
  
          public WithUnsynced(Id to, Topologies topologies, Route<?> route)
          {
              this(to, topologies, TxnId.NONE, route, latestRelevantEpochIndex(to, topologies, route));
          }
  
          protected WithUnsynced(Id to, Topologies topologies, TxnId txnId, Route<?> route, int startIndex)
          {
              super(to, topologies, route, txnId, startIndex);
              this.minEpoch = topologies.oldestEpoch();
          }
  
          protected WithUnsynced(TxnId txnId, Route<?> scope, long waitForEpoch, long minEpoch)
          {
              super(txnId, scope, waitForEpoch);
              this.minEpoch = minEpoch;
          }
      }
  
      public RouteRequest(Node.Id to, Topologies topologies, Route<?> route, TxnId txnId)
      {
          this(to, topologies, route, txnId, latestRelevantEpochIndex(to, topologies, route));
      }
  
      public RouteRequest(Node.Id to, Topologies topologies, Route<?> route, TxnId txnId, int startIndex)
      {
          this(txnId, computeScope(to, topologies, route, startIndex), computeWaitForEpoch(to, topologies, startIndex));
      }
  
      public RouteRequest(TxnId txnId, Route<?> scope, long waitForEpoch)
      {
          super(txnId, scope, waitForEpoch);
      }
  
      protected abstract @Nullable Cancellable submit();
  }
  