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.local.cfk;
  
  import javax.annotation.Nullable;
  
  import com.google.common.annotations.VisibleForTesting;
  
  import accord.local.Command;
  import accord.local.SafeCommandStore;
  
  /**
   * Encapsulates an updated {@code CommandsForKey} and any follow-up notification work that cannot be performed as part
   * of the {@code CommandsForKey} update because it can trigger updates that may lead to additional updates to the
   * {@code CommandsForKey}, which would still be being constructed. We therefore first update the {@code CommandsForKey},
   * then notify any work that might itself need to update the {@code CommandsForKey}.
   */
  public abstract class CommandsForKeyUpdate
  {
      @VisibleForTesting
      public abstract CommandsForKey cfk();
      abstract PostProcess postProcess();
      abstract void postProcess(SafeCommandStore safeStore, @Nullable CommandsForKey prevCfk, @Nullable Command command, NotifySink notifySink, boolean forceNotify);
  
      static class CommandsForKeyUpdateWithPostProcess extends CommandsForKeyUpdate
      {
          final CommandsForKey cfk;
          final PostProcess postProcess;
  
          CommandsForKeyUpdateWithPostProcess(CommandsForKey cfk, PostProcess postProcess)
          {
              this.cfk = cfk;
              this.postProcess = postProcess;
          }
  
          @Override
          public CommandsForKey cfk()
          {
              return cfk;
          }
  
          @Override
          PostProcess postProcess()
          {
              return postProcess;
          }
  
          @Override
          void postProcess(SafeCommandStore safeStore, @Nullable CommandsForKey prevCfk, @Nullable Command command, NotifySink notifySink, boolean forceNotify)
          {
              cfk.postProcess(safeStore, prevCfk, command, notifySink, forceNotify);
              postProcess.postProcess(safeStore, cfk.key(), notifySink);
          }
      }
  }
  
  