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 org.apache.beam.runners.core.TimerInternals.TimerData;
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A {@link TransformEvaluator} which delegates calls to an underlying {@link TransformEvaluator},
   * clearing the value of a {@link DoFnLifecycleManager} if any call throws an exception.
   */
  class DoFnLifecycleManagerRemovingTransformEvaluator<InputT> implements TransformEvaluator<InputT> {
    private static final Logger LOG =
        LoggerFactory.getLogger(DoFnLifecycleManagerRemovingTransformEvaluator.class);
    private final ParDoEvaluator<InputT> underlying;
    private final DoFnLifecycleManager lifecycleManager;
  
    public static <InputT> DoFnLifecycleManagerRemovingTransformEvaluator<InputT> wrapping(
        ParDoEvaluator<InputT> underlying, DoFnLifecycleManager lifecycleManager) {
      return new DoFnLifecycleManagerRemovingTransformEvaluator<>(underlying, lifecycleManager);
    }
  
    private DoFnLifecycleManagerRemovingTransformEvaluator(
        ParDoEvaluator<InputT> underlying, DoFnLifecycleManager lifecycleManager) {
      this.underlying = underlying;
      this.lifecycleManager = lifecycleManager;
    }
  
    public ParDoEvaluator<InputT> getParDoEvaluator() {
      return underlying;
    }
  
    @Override
    public void processElement(WindowedValue<InputT> element) throws Exception {
      try {
        underlying.processElement(element);
      } catch (Exception e) {
        onException(e, "Exception encountered while cleaning up after processing an element");
        throw e;
      }
    }
  
    public <KeyT> void onTimer(TimerData timer, KeyT key, BoundedWindow window) throws Exception {
      try {
        underlying.onTimer(timer, key, window);
      } catch (Exception e) {
        onException(e, "Exception encountered while cleaning up after processing a timer");
        throw e;
      }
    }
  
    @Override
    public TransformResult<InputT> finishBundle() throws Exception {
      try {
        return underlying.finishBundle();
      } catch (Exception e) {
        onException(e, "Exception encountered while cleaning up after finishing a bundle");
        throw e;
      }
    }
  
    private void onException(Exception e, String msg) {
      try {
        lifecycleManager.remove();
      } catch (Exception removalException) {
        if (removalException instanceof InterruptedException) {
          Thread.currentThread().interrupt();
        }
        LOG.error(msg, removalException);
        e.addSuppressed(removalException);
      }
    }
  }
  