001/*
002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
003 *
004 * Project and contact information: http://www.cascading.org/
005 *
006 * This file is part of the Cascading project.
007 *
008 * Licensed under the Apache License, Version 2.0 (the "License");
009 * you may not use this file except in compliance with the License.
010 * You may obtain a copy of the License at
011 *
012 *     http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing, software
015 * distributed under the License is distributed on an "AS IS" BASIS,
016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017 * See the License for the specific language governing permissions and
018 * limitations under the License.
019 */
020
021package cascading.flow.planner.rule.expressiongraph;
022
023import cascading.flow.planner.iso.expression.ElementCapture;
024import cascading.flow.planner.iso.expression.ExpressionGraph;
025import cascading.flow.planner.iso.expression.FlowElementExpression;
026import cascading.flow.planner.iso.expression.PathScopeExpression;
027import cascading.flow.planner.iso.finder.SearchOrder;
028import cascading.pipe.Merge;
029import cascading.tap.Tap;
030
031/**
032 *
033 */
034public class DualStreamedAccumulatedExpressionGraph extends ExpressionGraph
035  {
036  public DualStreamedAccumulatedExpressionGraph()
037    {
038    super( SearchOrder.Depth );
039
040    FlowElementExpression source = new FlowElementExpression( ElementCapture.Primary, Tap.class );
041
042    FlowElementExpression sink = new FlowElementExpression( ElementCapture.Secondary, Merge.class );
043
044    this.arc(
045      source,
046      PathScopeExpression.BLOCKING,
047      sink
048    );
049
050    this.arc(
051      source,
052      PathScopeExpression.NON_BLOCKING,
053      sink
054    );
055    }
056  }