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;
  
  import com.google.api.services.dataflow.model.Environment;
  
  /**
   * An instance of this class can be passed to the {@link DataflowRunner} to add user defined hooks
   * to be invoked at various times during pipeline execution.
   */
  public class DataflowRunnerHooks {
    /**
     * Allows the user to modify the environment of their job before their job is submitted to the
     * service for execution.
     *
     * @param environment The environment of the job. Users can make change to this instance in order
     *     to change the environment with which their job executes on the service.
     */
    public void modifyEnvironmentBeforeSubmission(Environment environment) {}
  }
  