content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.file.mdsync;
  
  import alluxio.master.file.meta.UfsSyncPathCache;
  import alluxio.util.ThreadFactoryUtils;
  
  import java.io.Closeable;
  import java.io.IOException;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.function.Consumer;
  
  /**
   * Takes {@link LoadResult} objects and processes them in an executor service.
   */
  class LoadResultExecutor implements Closeable {
  
    private final ExecutorService mExecutor;
    private final UfsSyncPathCache mSyncPathCache;
    private final SyncProcess mSyncProcess;
  
    LoadResultExecutor(
        SyncProcess syncProcess,
        int executorThreads, UfsSyncPathCache syncPathCache) {
      mExecutor = Executors.newFixedThreadPool(executorThreads,
          ThreadFactoryUtils.build("mdsync-perform-sync-%d", true));
      mSyncPathCache = syncPathCache;
      mSyncProcess = syncProcess;
    }
  
    void processLoadResult(
        LoadResult result, Runnable beforeProcessing, Consumer<SyncProcessResult> onComplete,
        Consumer<Throwable> onError) {
      mExecutor.submit(() -> {
        beforeProcessing.run();
        try {
          onComplete.accept(
              mSyncProcess.performSync(result, mSyncPathCache)
          );
        } catch (DefaultSyncProcess.MountPointNotFoundRuntimeException e) {
          result.getTaskInfo().getStats().reportSyncFailReason(
              result.getLoadRequest(), result,
              SyncFailReason.PROCESSING_MOUNT_POINT_DOES_NOT_EXIST, e);
          onError.accept(e);
        } catch (Throwable t) {
          result.getTaskInfo().getStats().reportSyncFailReason(
              result.getLoadRequest(), result, SyncFailReason.PROCESSING_UNKNOWN, t);
          onError.accept(t);
        }
      });
    }
  
    @Override
    public void close() throws IOException {
      mExecutor.shutdown();
    }
  }
  