com.dataartisans.flink.cascading.planner.rules.TopDownSplitBoundariesNodePartitioner Maven / Gradle / Ivy
/*
* Copyright 2015 data Artisans GmbH
*
* 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 com.dataartisans.flink.cascading.planner.rules;
import cascading.flow.planner.iso.ElementAnnotation;
import cascading.flow.planner.iso.expression.ElementCapture;
import cascading.flow.planner.iso.expression.ExpressionGraph;
import cascading.flow.planner.iso.expression.PathScopeExpression;
import cascading.flow.planner.iso.expression.TypeExpression;
import cascading.flow.planner.iso.finder.SearchOrder;
import cascading.flow.planner.rule.RuleExpression;
import cascading.flow.planner.rule.elementexpression.BoundariesElementExpression;
import cascading.flow.planner.rule.expressiongraph.NoGroupJoinMergeBoundaryTapExpressionGraph;
import cascading.flow.planner.rule.partitioner.ExpressionRulePartitioner;
import cascading.flow.stream.graph.IORole;
import static cascading.flow.planner.rule.PlanPhase.PartitionNodes;
public class TopDownSplitBoundariesNodePartitioner extends ExpressionRulePartitioner {
public TopDownSplitBoundariesNodePartitioner() {
super(
PartitionNodes,
new RuleExpression(
new NoGroupJoinMergeBoundaryTapExpressionGraph(),
new TopDownSplitBoundariesExpressionGraph()
),
new ElementAnnotation(ElementCapture.Include, IORole.sink)
);
}
private static class TopDownSplitBoundariesExpressionGraph extends ExpressionGraph
{
public TopDownSplitBoundariesExpressionGraph()
{
super( SearchOrder.Topological );
this.arc(
new BoundariesElementExpression( ElementCapture.Primary, TypeExpression.Topo.Split ),
PathScopeExpression.ANY,
new BoundariesElementExpression()
);
}
}
}