| /* |
| * 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.tinkerpop.gremlin.process.traversal.strategy.finalization; |
| |
| import org.apache.tinkerpop.gremlin.process.computer.traversal.step.map.VertexProgramStep; |
| import org.apache.tinkerpop.gremlin.process.traversal.Step; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.ProfilingAware; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.ProfileSideEffectStep; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.util.EmptyStep; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.util.ProfileStep; |
| import org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy; |
| import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalHelper; |
| import org.apache.tinkerpop.gremlin.structure.Graph; |
| |
| import java.util.List; |
| |
| /** |
| * @author Bob Briody (http://bobbriody.com) |
| */ |
| public final class ProfileStrategy extends AbstractTraversalStrategy<TraversalStrategy.FinalizationStrategy> implements TraversalStrategy.FinalizationStrategy { |
| |
| private static final ProfileStrategy INSTANCE = new ProfileStrategy(); |
| private static final String MARKER = Graph.Hidden.hide("gremlin.profile"); |
| |
| private ProfileStrategy() { |
| } |
| |
| @Override |
| public void apply(final Traversal.Admin<?, ?> traversal) { |
| if ((traversal.getParent() instanceof EmptyStep || traversal.getParent() instanceof VertexProgramStep) && |
| TraversalHelper.hasStepOfAssignableClassRecursively(ProfileSideEffectStep.class, traversal)) |
| TraversalHelper.applyTraversalRecursively(t -> t.getEndStep().addLabel(MARKER), traversal); |
| if (traversal.getEndStep().getLabels().contains(MARKER)) { |
| traversal.getEndStep().removeLabel(MARKER); |
| // Add .profile() step after every pre-existing step. |
| final List<Step> steps = traversal.getSteps(); |
| final int numSteps = steps.size(); |
| for (int i = 0; i < numSteps; i++) { |
| // Do not inject profiling after ProfileSideEffectStep as this will be the last step on the root traversal. |
| if (steps.get(i * 2) instanceof ProfileSideEffectStep) |
| break; |
| // Create and inject ProfileStep |
| final ProfileStep profileStepToAdd = new ProfileStep(traversal); |
| traversal.addStep((i * 2) + 1, profileStepToAdd); |
| |
| final Step stepToBeProfiled = traversal.getSteps().get(i * 2); |
| if (stepToBeProfiled instanceof ProfilingAware) { |
| ((ProfilingAware) stepToBeProfiled).prepareForProfiling(); |
| } |
| } |
| } |
| } |
| |
| public static ProfileStrategy instance() { |
| return INSTANCE; |
| } |
| } |