compiler/optimizer/src/main/java/org/apache/nemo/compiler/optimizer/pass/compiletime/annotating/DuplicateEdgeGroupSizePass.java

/*
 * 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.nemo.compiler.optimizer.pass.compiletime.annotating;

import org.apache.nemo.common.ir.IRDAG;
import org.apache.nemo.common.ir.edge.executionproperty.DuplicateEdgeGroupProperty;
import org.apache.nemo.common.ir.edge.executionproperty.DuplicateEdgeGroupPropertyValue;

import java.util.HashMap;
import java.util.Optional;

/**
 * A pass for annotate duplicate data for each edge.
 */
@Annotates(DuplicateEdgeGroupProperty.class)
public final class DuplicateEdgeGroupSizePass extends AnnotatingPass {

  /**
   * Default constructor.
   */
  public DuplicateEdgeGroupSizePass() {
    super(DuplicateEdgeGroupSizePass.class);
  }

  @Override
  public IRDAG apply(final IRDAG dag) {
    final HashMap<String, Integer> groupIdToGroupSize = new HashMap<>();
    dag.topologicalDo(vertex -> dag.getIncomingEdgesOf(vertex)
      .forEach(e -> {
        final Optional<DuplicateEdgeGroupPropertyValue> duplicateEdgeGroupProperty =
          e.getPropertyValue(DuplicateEdgeGroupProperty.class);
        if (duplicateEdgeGroupProperty.isPresent()) {
          final String groupId = duplicateEdgeGroupProperty.get().getGroupId();
          final Integer currentCount = groupIdToGroupSize.getOrDefault(groupId, 0);
          groupIdToGroupSize.put(groupId, currentCount + 1);
        }
      }));

    dag.topologicalDo(vertex -> dag.getIncomingEdgesOf(vertex)
      .forEach(e -> {
        final Optional<DuplicateEdgeGroupPropertyValue> duplicateEdgeGroupProperty =
          e.getPropertyValue(DuplicateEdgeGroupProperty.class);
        if (duplicateEdgeGroupProperty.isPresent()) {
          final String groupId = duplicateEdgeGroupProperty.get().getGroupId();
          if (groupIdToGroupSize.containsKey(groupId)) {
            duplicateEdgeGroupProperty.get().setGroupSize(groupIdToGroupSize.get(groupId));
          }
        }
      }));
    return dag;
  }
}