/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* Licensed 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 cascading.flow.tez.planner.rule.assertion;
import cascading.flow.hadoop.planner.rule.expression.DualStreamedAccumulatedExpression;
import cascading.flow.planner.rule.RuleAssert;
import static cascading.flow.planner.rule.PlanPhase.PostNodes;
/**
* Throws a planner failure if a Tap, both accumulating and streamed, flows into a single merge within a given
* pipeline.
* <p/>
* The optimization is to remove the streamed edge between tap and merge, but GraphFinder needs to support marking
* edges.
*/
public class DualStreamedAccumulatedMergeNodeAssert extends RuleAssert
{
public DualStreamedAccumulatedMergeNodeAssert()
{
super(
PostNodes,
new DualStreamedAccumulatedExpression(),
"may not merge accumulated and streamed in same pipeline: {Secondary}"
);
}
}