| /* |
| * 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.physical.impl; |
| |
| import java.util.List; |
| |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.exec.ops.FragmentContext; |
| import org.apache.drill.exec.physical.base.AbstractPhysicalVisitor; |
| import org.apache.drill.exec.physical.base.FragmentRoot; |
| import org.apache.drill.exec.physical.base.PhysicalOperator; |
| import org.apache.drill.exec.physical.config.Trace; |
| |
| import com.google.common.collect.Lists; |
| |
| |
| public class TraceInjector extends AbstractPhysicalVisitor<PhysicalOperator, FragmentContext, ExecutionSetupException> { |
| |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TraceInjector.class); |
| |
| static int traceTagCount = 0; |
| RootExec root = null; |
| |
| public static PhysicalOperator getExec(FragmentContext context, FragmentRoot root) throws ExecutionSetupException { |
| TraceInjector tI = new TraceInjector(); |
| PhysicalOperator newOp = root.accept(tI, context); |
| |
| return newOp; |
| } |
| |
| /** |
| * Traverse the physical plan and inject the trace operator after |
| * every operator. |
| * @param op Physical operator under which the trace operator will be injected |
| * @param context Fragment context |
| * @return same physical operator as passed in, but its child will be a trace operator |
| * whose child will be the original child of this operator |
| * @throws ExecutionSetupException |
| */ |
| @Override |
| public PhysicalOperator visitOp(PhysicalOperator op, FragmentContext context) throws ExecutionSetupException{ |
| |
| List<PhysicalOperator> newChildren = Lists.newArrayList(); |
| List<PhysicalOperator> list = null; |
| PhysicalOperator newOp = op; |
| |
| /* Get the list of child operators */ |
| for (PhysicalOperator child : op) |
| { |
| newChildren.add(child.accept(this, context)); |
| } |
| |
| list = Lists.newArrayList(); |
| |
| /* For every child operator create a trace operator as its parent */ |
| for (int i = 0; i < newChildren.size(); i++) |
| { |
| String traceTag = newChildren.get(i).toString() + Integer.toString(traceTagCount++); |
| |
| /* Trace operator */ |
| Trace traceOp = new Trace(newChildren.get(i), traceTag); |
| list.add(traceOp); |
| } |
| |
| /* Inject trace operator */ |
| if (list.size() > 0) { |
| newOp = op.getNewWithChildren(list); |
| } |
| newOp.setOperatorId(op.getOperatorId()); |
| |
| return newOp; |
| } |
| } |