| /* |
| * 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.driver; |
| |
| import org.apache.commons.lang3.exception.ExceptionUtils; |
| import org.junit.Test; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.hamcrest.Matchers.greaterThan; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public class ResultQueueTest extends AbstractResultQueueTest { |
| |
| @Test |
| public void shouldGetSizeUntilError() throws Exception { |
| final Thread t = addToQueue(100, 10, true, false, 1); |
| try { |
| assertThat(resultQueue.size(), is(greaterThan(0))); |
| assertThat(readCompleted.isDone(), is(false)); |
| |
| final Exception theProblem = new Exception(); |
| resultQueue.markError(theProblem); |
| assertThat(readCompleted.isDone(), is(true)); |
| |
| try { |
| resultQueue.size(); |
| fail("Should have thrown an exception"); |
| } catch (Exception ex) { |
| assertEquals(theProblem, ex.getCause()); |
| } |
| } finally { |
| t.interrupt(); |
| } |
| } |
| |
| @Test |
| public void shouldBeEmptyThenNotEmpty() { |
| assertThat(resultQueue.isEmpty(), is(true)); |
| resultQueue.add(new Result("test")); |
| assertThat(resultQueue.isEmpty(), is(false)); |
| } |
| |
| @Test |
| public void shouldNotBeEmptyUntilError() throws Exception { |
| final Thread t = addToQueue(100, 10, true, false, 1); |
| try { |
| assertThat(resultQueue.isEmpty(), is(false)); |
| assertThat(readCompleted.isDone(), is(false)); |
| |
| final Exception theProblem = new Exception(); |
| resultQueue.markError(theProblem); |
| assertThat(readCompleted.isDone(), is(true)); |
| |
| try { |
| resultQueue.isEmpty(); |
| fail("Should have thrown an exception"); |
| } catch (Exception ex) { |
| assertEquals(theProblem, ex.getCause()); |
| } |
| } finally { |
| t.interrupt(); |
| } |
| } |
| |
| @Test |
| public void shouldDrainUntilError() throws Exception { |
| final Thread t = addToQueue(100, 10, true, false, 1); |
| try { |
| assertThat(resultQueue.isEmpty(), is(false)); |
| final List<Result> drain = new ArrayList<>(); |
| resultQueue.drainTo(drain); |
| assertThat(drain.size(), is(greaterThan(0))); |
| assertThat(readCompleted.isDone(), is(false)); |
| |
| // make sure some more items get added to the queue before assert |
| TimeUnit.MILLISECONDS.sleep(100); |
| |
| assertThat(resultQueue.isEmpty(), is(false)); |
| assertThat(readCompleted.isDone(), is(false)); |
| |
| final Exception theProblem = new Exception(); |
| resultQueue.markError(theProblem); |
| assertThat(readCompleted.isDone(), is(true)); |
| |
| try { |
| resultQueue.drainTo(new ArrayList<>()); |
| fail("Should have thrown an exception"); |
| } catch (Exception ex) { |
| assertEquals(theProblem, ex.getCause()); |
| } |
| } finally { |
| t.interrupt(); |
| } |
| } |
| |
| @Test |
| public void shouldAwaitEverythingAndFlushOnMarkCompleted() throws Exception { |
| final CompletableFuture<List<Result>> future = resultQueue.await(4); |
| resultQueue.add(new Result("test1")); |
| resultQueue.add(new Result("test2")); |
| resultQueue.add(new Result("test3")); |
| |
| assertThat(future.isDone(), is(false)); |
| resultQueue.markComplete(); |
| assertThat(future.isDone(), is(true)); |
| |
| final List<Result> results = future.get(); |
| assertEquals("test1", results.get(0).getString()); |
| assertEquals("test2", results.get(1).getString()); |
| assertEquals("test3", results.get(2).getString()); |
| assertEquals(3, results.size()); |
| |
| assertThat(resultQueue.isEmpty(), is(true)); |
| } |
| |
| @Test |
| public void shouldAwaitFailTheFutureOnMarkError() throws Exception { |
| // not so sure this is good behavior (i.e. flushing whatever has arrived up to the error) |
| final CompletableFuture<List<Result>> future = resultQueue.await(4); |
| resultQueue.add(new Result("test1")); |
| resultQueue.add(new Result("test2")); |
| resultQueue.add(new Result("test3")); |
| |
| assertThat(future.isDone(), is(false)); |
| resultQueue.markError(new Exception("no worky")); |
| assertThat(future.isDone(), is(true)); |
| |
| try { |
| future.get(); |
| } catch (Exception ex) { |
| final Throwable t = ExceptionUtils.getRootCause(ex); |
| assertEquals("no worky", t.getMessage()); |
| } |
| } |
| |
| @Test |
| public void shouldAwaitToExpectedValueAndDrainOnAdd() throws Exception { |
| final CompletableFuture<List<Result>> future = resultQueue.await(3); |
| resultQueue.add(new Result("test1")); |
| resultQueue.add(new Result("test2")); |
| |
| // shouldn't complete until the third item is in play |
| assertThat(future.isDone(), is(false)); |
| |
| resultQueue.add(new Result("test3")); |
| |
| final List<Result> results = future.get(); |
| assertEquals("test1", results.get(0).getString()); |
| assertEquals("test2", results.get(1).getString()); |
| assertEquals("test3", results.get(2).getString()); |
| assertEquals(3, results.size()); |
| |
| assertThat(resultQueue.isEmpty(), is(true)); |
| } |
| |
| @Test |
| public void shouldAwaitMultipleToExpectedValueAndDrainOnAdd() throws Exception { |
| final CompletableFuture<List<Result>> future1 = resultQueue.await(3); |
| final CompletableFuture<List<Result>> future2 = resultQueue.await(1); |
| resultQueue.add(new Result("test1")); |
| resultQueue.add(new Result("test2")); |
| |
| // shouldn't complete the first future until the third item is in play |
| assertThat(future1.isDone(), is(false)); |
| assertThat(future2.isDone(), is(false)); |
| |
| resultQueue.add(new Result("test3")); |
| |
| final List<Result> results1 = future1.get(); |
| assertEquals("test1", results1.get(0).getString()); |
| assertEquals("test2", results1.get(1).getString()); |
| assertEquals("test3", results1.get(2).getString()); |
| assertEquals(3, results1.size()); |
| assertThat(future1.isDone(), is(true)); |
| assertThat(future2.isDone(), is(false)); |
| |
| resultQueue.add(new Result("test4")); |
| assertThat(future1.isDone(), is(true)); |
| assertThat(future2.isDone(), is(true)); |
| |
| final List<Result> results2 = future2.get(); |
| assertEquals("test4", results2.get(0).getString()); |
| assertEquals(1, results2.size()); |
| |
| assertThat(resultQueue.isEmpty(), is(true)); |
| } |
| |
| @Test |
| public void shouldAwaitToExpectedValueAndDrainOnAwait() throws Exception { |
| resultQueue.add(new Result("test1")); |
| resultQueue.add(new Result("test2")); |
| resultQueue.add(new Result("test3")); |
| |
| final CompletableFuture<List<Result>> future = resultQueue.await(3); |
| assertThat(future.isDone(), is(true)); |
| |
| final List<Result> results = future.get(); |
| assertEquals("test1", results.get(0).getString()); |
| assertEquals("test2", results.get(1).getString()); |
| assertEquals("test3", results.get(2).getString()); |
| assertEquals(3, results.size()); |
| |
| assertThat(resultQueue.isEmpty(), is(true)); |
| } |
| |
| @Test |
| public void shouldAwaitToReadCompletedAndDrainOnAwait() throws Exception { |
| resultQueue.add(new Result("test1")); |
| resultQueue.add(new Result("test2")); |
| resultQueue.add(new Result("test3")); |
| |
| resultQueue.markComplete(); |
| |
| // you might want 30 but there are only three |
| final CompletableFuture<List<Result>> future = resultQueue.await(30); |
| assertThat(future.isDone(), is(true)); |
| |
| final List<Result> results = future.get(); |
| assertEquals("test1", results.get(0).getString()); |
| assertEquals("test2", results.get(1).getString()); |
| assertEquals("test3", results.get(2).getString()); |
| assertEquals(3, results.size()); |
| |
| assertThat(resultQueue.isEmpty(), is(true)); |
| } |
| |
| @Test |
| public void shouldDrainAsItemsArrive() throws Exception { |
| final Thread t = addToQueue(1000, 1, true); |
| try { |
| final AtomicInteger count1 = new AtomicInteger(0); |
| final AtomicInteger count2 = new AtomicInteger(0); |
| final AtomicInteger count3 = new AtomicInteger(0); |
| final CountDownLatch latch = new CountDownLatch(3); |
| |
| resultQueue.await(500).thenAcceptAsync(r -> { |
| count1.set(r.size()); |
| latch.countDown(); |
| }); |
| |
| resultQueue.await(150).thenAcceptAsync(r -> { |
| count2.set(r.size()); |
| latch.countDown(); |
| }); |
| |
| resultQueue.await(350).thenAcceptAsync(r -> { |
| count3.set(r.size()); |
| latch.countDown(); |
| }); |
| |
| assertThat(latch.await(3000, TimeUnit.MILLISECONDS), is(true)); |
| |
| assertEquals(500, count1.get()); |
| assertEquals(150, count2.get()); |
| assertEquals(350, count3.get()); |
| |
| assertThat(resultQueue.isEmpty(), is(true)); |
| } finally { |
| t.interrupt(); |
| } |
| } |
| } |