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.dataflow.worker.windmill.client.commits;
  
  import javax.annotation.concurrent.ThreadSafe;
  import org.apache.beam.sdk.annotations.Internal;
  
  /**
   * Commits {@link org.apache.beam.runners.dataflow.worker.streaming.Work} that has completed user
   * processing back to persistence layer.
   */
  @Internal
  @ThreadSafe
  public interface WorkCommitter {
  
    /** Starts internal processing of commits. */
    void start();
  
    /**
     * Add a commit to {@link WorkCommitter}. This may be block the calling thread depending on
     * underlying implementations, and persisting to the persistence layer may be done asynchronously.
     */
    void commit(Commit commit);
  
    /** Number of bytes currently trying to be committed to the backing persistence layer. */
    long currentActiveCommitBytes();
  
    /**
     * Stops internal processing of commits. In progress and subsequent commits may be canceled or
     * dropped.
     */
    void stop();
  
    /**
     * Number of internal workers {@link WorkCommitter} uses to commit work to the backing persistence
     * layer.
     */
    int parallelism();
  }
  