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.util.common.worker;
  
  /** A partial group-by-key {@link ParDoFn} implementation. */
  public class SimplePartialGroupByKeyParDoFn<K, InputT, AccumT> implements ParDoFn {
    private final GroupingTable<K, InputT, AccumT> groupingTable;
    private final Receiver receiver;
  
    public SimplePartialGroupByKeyParDoFn(
        GroupingTable<K, InputT, AccumT> groupingTable, Receiver receiver) {
      this.groupingTable = groupingTable;
      this.receiver = receiver;
    }
  
    @Override
    public void startBundle(Receiver... receivers) throws Exception {}
  
    @Override
    public void processElement(Object elem) throws Exception {
      groupingTable.put(elem, receiver);
    }
  
    @Override
    public void processTimers() {}
  
    @Override
    public void finishBundle() throws Exception {
      groupingTable.flush(receiver);
    }
  
    @Override
    public void abort() {}
  }
  