| /* |
| * 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; |
| |
| import org.apache.tinkerpop.gremlin.LoadGraphWith; |
| import org.apache.tinkerpop.gremlin.process.AbstractGremlinProcessTest; |
| import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource; |
| import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalInterruptedException; |
| import org.hamcrest.CoreMatchers; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| import java.util.Arrays; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.function.Function; |
| import java.util.function.UnaryOperator; |
| |
| import static org.apache.tinkerpop.gremlin.LoadGraphWith.GraphData.GRATEFUL; |
| import static org.junit.Assert.assertThat; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| @RunWith(Parameterized.class) |
| public class TraversalInterruptionTest extends AbstractGremlinProcessTest { |
| |
| @Parameterized.Parameters(name = "expectInterruption({0})") |
| public static Iterable<Object[]> data() { |
| return Arrays.asList(new Object[][]{ |
| {"g_V", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.V(), (UnaryOperator<GraphTraversal<?,?>>) t -> t}, |
| {"g_V_out", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.V(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.out()}, |
| {"g_V_outE", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.V(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.outE()}, |
| {"g_V_in", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.V(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.in()}, |
| {"g_V_inE", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.V(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.inE()}, |
| {"g_V_properties", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.V(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.properties()}, |
| {"g_E", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.E(), (UnaryOperator<GraphTraversal<?,?>>) t -> t}, |
| {"g_E_outV", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.E(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.outV()}, |
| {"g_E_inV", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.E(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.inV()}, |
| {"g_E_properties", (Function<GraphTraversalSource, GraphTraversal<?,?>>) g -> g.E(), (UnaryOperator<GraphTraversal<?,?>>) t -> t.properties()}, |
| }); |
| } |
| |
| @Parameterized.Parameter(value = 0) |
| public String name; |
| |
| @Parameterized.Parameter(value = 1) |
| public Function<GraphTraversalSource,GraphTraversal<?,?>> traversalBeforePause; |
| |
| @Parameterized.Parameter(value = 2) |
| public UnaryOperator<GraphTraversal<?,?>> traversalAfterPause; |
| |
| @Test |
| @LoadGraphWith(GRATEFUL) |
| public void shouldRespectThreadInterruptionInVertexStep() throws Exception { |
| final AtomicBoolean exceptionThrown = new AtomicBoolean(false); |
| final CountDownLatch startedIterating = new CountDownLatch(1); |
| final Thread t = new Thread(() -> { |
| try { |
| final Traversal traversal = traversalAfterPause.apply(traversalBeforePause.apply(g).sideEffect(traverser -> { |
| // let the first iteration flow through |
| if (startedIterating.getCount() == 0) { |
| // ensure that the whole traversal doesn't iterate out before we get a chance to interrupt |
| // the next iteration should stop so we can force the interrupt to be handled by VertexStep |
| try { |
| Thread.sleep(3000); |
| } catch (Exception ignored) { |
| // make sure that the interrupt propagates in case the interrupt occurs during sleep. |
| // this should ensure VertexStep gets to try to throw the TraversalInterruptedException |
| Thread.currentThread().interrupt(); |
| } |
| } |
| })).sideEffect(traverser -> { |
| startedIterating.countDown(); |
| }); |
| traversal.iterate(); |
| } catch (Exception ex) { |
| exceptionThrown.set(ex instanceof TraversalInterruptedException); |
| } |
| }, name); |
| |
| t.start(); |
| |
| // total time for test should not exceed 5 seconds - this prevents the test from just hanging and allows |
| // it to finish with failure |
| assertThat(startedIterating.await(5000, TimeUnit.MILLISECONDS), CoreMatchers.is(true)); |
| |
| t.interrupt(); |
| t.join(); |
| |
| // ensure that some but not all of the traversal was iterated and that the right exception was tossed |
| assertThat(exceptionThrown.get(), CoreMatchers.is(true)); |
| } |
| } |