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.concurrent;
  
  import java.util.concurrent.Callable;
  
  import org.apache.cassandra.utils.Closeable;
  import org.apache.cassandra.utils.WithResources;
  import org.apache.cassandra.utils.concurrent.RunnableFuture;
  import org.apache.cassandra.utils.concurrent.SyncFuture;
  
  public class SyncFutureTask<T> extends SyncFuture<T> implements RunnableFuture<T>
  {
      final Callable<T> call;
  
      public SyncFutureTask(Callable<T> call)
      {
          this.call = call;
      }
  
      public SyncFutureTask(WithResources withResources, Callable<T> call)
      {
          this.call = new Callable<T>()
          {
              @Override
              public T call() throws Exception
              {
                  try (Closeable close = withResources.get())
                  {
                      return call.call();
                  }
              }
  
              @Override
              public String toString()
              {
                  return call.toString();
              }
          };
      }
  
      public void run()
      {
          try
          {
              if (!setUncancellable())
              {
                  if (isCancelled()) return;
                  else throw new IllegalStateException();
              }
  
              if (!trySuccess(call.call()))
                  throw new IllegalStateException();
          }
          catch (Throwable t)
          {
              tryFailure(t);
              // A lot of exceptions are expected and will be handled by Cassandra
              // by consuming the result of the future task so only treat Error
              // as uncaught
              if (t instanceof Error)
                  ExecutionFailure.handle(t);
          }
      }
  
      @Override
      public String description()
      {
          return call.toString();
      }
  }
  