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;
  
  import java.io.IOException;
  
  /** ShuffleWriter writes chunks of records to a shuffle dataset. */
  interface ShuffleWriter extends AutoCloseable {
    /**
     * Writes a chunk of records. The chunk is a sequence of pairs encoded as:
     * <key-size><key><secondary-key-size><secondary-key><value-size><value> where the sizes are
     * 4-byte big-endian integers.
     */
    public void write(byte[] chunk) throws IOException;
  
    /** Flushes written records and closes this writer. */
    @Override
    public void close() throws IOException;
  }
  