001/*
002 * Copyright (c) 2016 Chris K Wensel <chris@wensel.net>. All Rights Reserved.
003 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved.
004 *
005 * Project and contact information: http://www.cascading.org/
006 *
007 * This file is part of the Cascading project.
008 *
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *     http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 */
021
022package cascading.flow.hadoop.planner.rule.assertion;
023
024import cascading.flow.hadoop.planner.rule.expression.DualStreamedAccumulatedExpression;
025import cascading.flow.planner.rule.RuleAssert;
026
027import static cascading.flow.planner.rule.PlanPhase.PostPipelines;
028
029/**
030 * Throws a planner failure if a Tap, both accumulating and streamed, flows into a single merge within a given
031 * pipeline.
032 */
033public class DualStreamedAccumulatedMergePipelineAssert extends RuleAssert
034  {
035  public DualStreamedAccumulatedMergePipelineAssert()
036    {
037    super(
038      PostPipelines,
039      new DualStreamedAccumulatedExpression(),
040      "may not merge accumulated and streamed in same pipeline: {Secondary}"
041    );
042    }
043  }