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 com.alipay.remoting.util;
  
  import java.util.concurrent.ExecutionException;
  
  import org.slf4j.Logger;
  
  /**
   * Utils for future task
   *
   * @author tsui
   * @version $Id: FutureTaskUtil.java, v 0.1 2017-07-24 17:07 tsui Exp $
   */
  public class FutureTaskUtil {
      /**
       * get the result of a future task
       *
       * Notice: the run method of this task should have been called at first.
       *
       * @param task
       * @param <T>
       * @return
       */
      public static <T> T getFutureTaskResult(RunStateRecordedFutureTask<T> task, Logger logger) {
          T t = null;
          if (null != task) {
              try {
                  t = task.getAfterRun();
              } catch (InterruptedException e) {
                  logger.error("Future task interrupted!", e);
              } catch (ExecutionException e) {
                  logger.error("Future task execute failed!", e);
              } catch (FutureTaskNotRunYetException e) {
                  logger.warn("Future task has not run yet!", e);
              } catch (FutureTaskNotCompleted e) {
                  logger.warn("Future task has not completed!", e);
              }
          }
          return t;
      }
  
      /**
       * launder the throwable
       *
       * @param t
       */
      public static void launderThrowable(Throwable t) {
          if (t instanceof RuntimeException) {
              throw (RuntimeException) t;
          } else if (t instanceof Error) {
              throw (Error) t;
          } else {
              throw new IllegalStateException("Not unchecked!", t);
          }
      }
  }