| /* |
| * 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.drill.exec.planner.fragment; |
| |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import com.google.common.collect.Maps; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class PlanningSet implements Iterable<Wrapper> { |
| static final Logger logger = LoggerFactory.getLogger(PlanningSet.class); |
| |
| private final Map<Fragment, Wrapper> fragmentMap = Maps.newHashMap(); |
| private int majorFragmentIdIndex; |
| private Wrapper rootWrapper; |
| |
| public Wrapper get(Fragment node) { |
| Wrapper wrapper = fragmentMap.get(node); |
| if (wrapper == null) { |
| |
| int majorFragmentId = 0; |
| |
| // If there is a sending exchange, we need to number other than zero. |
| if (node.getSendingExchange() != null) { |
| |
| // assign the upper 16 bits as the major fragment id. |
| majorFragmentId = node.getSendingExchange().getChild().getOperatorId() >> 16; |
| |
| // if they are not assigned, that means we mostly likely have an externally generated plan. |
| // In this case, come up with a major fragmentid. |
| if (majorFragmentId == 0) { |
| majorFragmentId = majorFragmentIdIndex; |
| } |
| } |
| wrapper = new Wrapper(node, majorFragmentId); |
| fragmentMap.put(node, wrapper); |
| majorFragmentIdIndex++; |
| } |
| return wrapper; |
| } |
| |
| @Override |
| public Iterator<Wrapper> iterator() { |
| return this.fragmentMap.values().iterator(); |
| } |
| |
| @Override |
| public String toString() { |
| return "FragmentPlanningSet:\n" + fragmentMap.values() + "]"; |
| } |
| |
| /** |
| * find the root Wrapper which contains the root Fragment and |
| * hold the root wrapper |
| * @param rootFragment |
| * @return root wrapper |
| */ |
| public Wrapper findRootWrapper(Fragment rootFragment){ |
| for (Wrapper wrapper : this) { |
| Fragment fragment = wrapper.getNode(); |
| if (fragment == rootFragment) { |
| rootWrapper = wrapper; |
| break; |
| } |
| } |
| return rootWrapper; |
| } |
| |
| public Wrapper getRootWrapper(){ |
| return rootWrapper; |
| } |
| } |