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 org.apache.cassandra.simulator.systems;
  
  import java.util.function.BiConsumer;
  
  import org.apache.cassandra.distributed.api.IInvokableInstance;
  import org.apache.cassandra.distributed.api.IIsolatedExecutor.SerializableCallable;
  import org.apache.cassandra.simulator.systems.InterceptedExecution.InterceptedTaskExecution;
  
  public abstract class SimulatedActionCallable<O> extends SimulatedAction implements BiConsumer<O, Throwable>
  {
      protected final IInvokableInstance on;
      protected SerializableCallable<? extends O> execute;
  
      public SimulatedActionCallable(Object description, Modifiers self, Modifiers children, SimulatedSystems simulated, IInvokableInstance on, SerializableCallable<? extends O> execute)
      {
          super(description, self, children, null, simulated);
          this.execute = execute;
          this.on = on;
      }
  
      @Override
      protected InterceptedTaskExecution task()
      {
          return new InterceptedTaskExecution((InterceptingExecutor) on.executor())
          {
              public void run()
              {
                  // we'll be invoked on the node's executor, but we need to ensure the task is loaded on its classloader
                  try { accept(on.unsafeCallOnThisThread(execute), null); }
                  catch (Throwable t) { accept(null, t); }
                  finally { execute = null; }
              }
          };
      }
  }
  