| /* |
| * 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.step.sideEffect; |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Operator; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traverser; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.GraphComputing; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.SideEffectCapable; |
| import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalMetrics; |
| import org.apache.tinkerpop.gremlin.structure.Graph; |
| import org.apache.tinkerpop.gremlin.util.function.DefaultTraversalMetricsSupplier; |
| |
| import java.util.function.Supplier; |
| |
| /** |
| * @author Bob Briody (http://bobbriody.com) |
| */ |
| public final class ProfileSideEffectStep<S> extends SideEffectStep<S> implements SideEffectCapable<DefaultTraversalMetrics, DefaultTraversalMetrics>, GraphComputing { |
| public static final String DEFAULT_METRICS_KEY = Graph.Hidden.hide("metrics"); |
| |
| private String sideEffectKey; |
| private boolean onGraphComputer = false; |
| |
| public ProfileSideEffectStep(final Traversal.Admin traversal, final String sideEffectKey) { |
| super(traversal); |
| this.sideEffectKey = sideEffectKey; |
| this.getTraversal().getSideEffects().registerIfAbsent(this.sideEffectKey, (Supplier) DefaultTraversalMetricsSupplier.instance(), Operator.assign); |
| } |
| |
| @Override |
| protected void sideEffect(final Traverser.Admin<S> traverser) { |
| } |
| |
| @Override |
| public String getSideEffectKey() { |
| return this.sideEffectKey; |
| } |
| |
| @Override |
| public Traverser.Admin<S> next() { |
| Traverser.Admin<S> start = null; |
| try { |
| start = super.next(); |
| return start; |
| } finally { |
| if (!this.onGraphComputer && start == null) { |
| final DefaultTraversalMetrics m = getTraversalMetricsFromSideEffects(); |
| if (!m.isFinalized()) m.setMetrics(this.getTraversal(), false); |
| } |
| } |
| } |
| |
| @Override |
| public boolean hasNext() { |
| boolean start = super.hasNext(); |
| if (!this.onGraphComputer && !start) { |
| final DefaultTraversalMetrics m = getTraversalMetricsFromSideEffects(); |
| if (!m.isFinalized()) m.setMetrics(this.getTraversal(), false); |
| } |
| return start; |
| } |
| |
| private DefaultTraversalMetrics getTraversalMetricsFromSideEffects() { |
| return (DefaultTraversalMetrics) this.getTraversal().getSideEffects().get(this.sideEffectKey); |
| } |
| |
| @Override |
| public DefaultTraversalMetrics generateFinalResult(final DefaultTraversalMetrics tm) { |
| if (this.onGraphComputer && !tm.isFinalized()) |
| tm.setMetrics(this.getTraversal(), true); |
| return tm; |
| } |
| |
| @Override |
| public void onGraphComputer() { |
| onGraphComputer = true; |
| } |
| } |