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.beam.runners.direct;
  
  import java.util.ArrayList;
  import java.util.Collection;
  
  /** Utility methods for interacting with {@link DoFnLifecycleManager DoFnLifecycleManagers}. */
  class DoFnLifecycleManagers {
    private DoFnLifecycleManagers() {
      /* Do not instantiate */
    }
  
    static void removeAllFromManagers(Iterable<DoFnLifecycleManager> managers) throws Exception {
      Collection<Exception> thrown = new ArrayList<>();
      for (DoFnLifecycleManager manager : managers) {
        thrown.addAll(manager.removeAll());
      }
      if (!thrown.isEmpty()) {
        Exception overallException = new Exception("Exceptions thrown while tearing down DoFns");
        for (Exception e : thrown) {
          overallException.addSuppressed(e);
        }
        throw overallException;
      }
    }
  }
  