1082 lines
36 KiB
Java
1082 lines
36 KiB
Java
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* This file is available under and governed by the GNU General Public
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* License version 2 only, as published by the Free Software Foundation.
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* However, the following notice accompanied the original version of this
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* file:
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*
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* Written by Doug Lea with assistance from members of JCP JSR-166
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* Expert Group and released to the public domain, as explained at
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* http://creativecommons.org/publicdomain/zero/1.0/
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* Other contributors include John Vint
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*/
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import static java.util.concurrent.TimeUnit.MILLISECONDS;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.List;
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import java.util.NoSuchElementException;
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import java.util.Queue;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.Callable;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.LinkedTransferQueue;
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import junit.framework.Test;
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@SuppressWarnings({"unchecked", "rawtypes"})
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public class LinkedTransferQueueTest extends JSR166TestCase {
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public static class Generic extends BlockingQueueTest {
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protected BlockingQueue emptyCollection() {
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return new LinkedTransferQueue();
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}
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}
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public static void main(String[] args) {
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main(suite(), args);
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}
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public static Test suite() {
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class Implementation implements CollectionImplementation {
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public Class<?> klazz() { return LinkedTransferQueue.class; }
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public Collection emptyCollection() { return new LinkedTransferQueue(); }
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public Object makeElement(int i) { return JSR166TestCase.itemFor(i); }
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public boolean isConcurrent() { return true; }
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public boolean permitsNulls() { return false; }
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}
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return newTestSuite(LinkedTransferQueueTest.class,
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new Generic().testSuite(),
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CollectionTest.testSuite(new Implementation()));
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}
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/**
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* Constructor builds new queue with size being zero and empty
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* being true
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*/
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public void testConstructor1() {
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mustEqual(0, new LinkedTransferQueue().size());
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assertTrue(new LinkedTransferQueue().isEmpty());
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}
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/**
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* Initializing constructor with null collection throws
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* NullPointerException
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*/
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public void testConstructor2() {
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try {
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new LinkedTransferQueue(null);
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shouldThrow();
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} catch (NullPointerException success) {}
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}
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/**
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* Initializing from Collection of null elements throws
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* NullPointerException
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*/
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public void testConstructor3() {
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Collection<Item> elements = Arrays.asList(new Item[SIZE]);
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try {
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new LinkedTransferQueue(elements);
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shouldThrow();
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} catch (NullPointerException success) {}
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}
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/**
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* Initializing constructor with a collection containing some null elements
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* throws NullPointerException
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*/
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public void testConstructor4() {
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Item[] items = new Item[2];
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items[0] = zero;
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Collection<Item> elements = Arrays.asList(items);
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try {
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new LinkedTransferQueue(elements);
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shouldThrow();
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} catch (NullPointerException success) {}
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}
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/**
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* Queue contains all elements of the collection it is initialized by
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*/
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public void testConstructor5() {
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Item[] items = defaultItems;
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List<Item> intList = Arrays.asList(items);
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LinkedTransferQueue<Item> q = new LinkedTransferQueue<>(intList);
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mustEqual(q.size(), intList.size());
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mustEqual(q.toString(), intList.toString());
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assertTrue(Arrays.equals(q.toArray(),
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intList.toArray()));
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assertTrue(Arrays.equals(q.toArray(new Object[0]),
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intList.toArray(new Object[0])));
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assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
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intList.toArray(new Object[SIZE])));
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(items[i], q.poll());
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}
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}
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/**
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* remainingCapacity() always returns Integer.MAX_VALUE
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*/
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public void testRemainingCapacity() {
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BlockingQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
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mustEqual(SIZE - i, q.size());
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mustEqual(i, q.remove());
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}
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
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mustEqual(i, q.size());
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mustAdd(q, i);
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}
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}
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/**
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* addAll(this) throws IllegalArgumentException
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*/
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public void testAddAllSelf() {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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try {
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q.addAll(q);
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shouldThrow();
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} catch (IllegalArgumentException success) {}
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}
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/**
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* addAll of a collection with any null elements throws
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* NullPointerException after possibly adding some elements
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*/
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public void testAddAll3() {
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LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
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Item[] items = new Item[2]; items[0] = zero;
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try {
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q.addAll(Arrays.asList(items));
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shouldThrow();
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} catch (NullPointerException success) {}
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}
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/**
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* Queue contains all elements, in traversal order, of successful addAll
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*/
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public void testAddAll5() {
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Item[] empty = new Item[0];
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Item[] items = defaultItems;
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LinkedTransferQueue q = new LinkedTransferQueue();
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assertFalse(q.addAll(Arrays.asList(empty)));
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assertTrue(q.addAll(Arrays.asList(items)));
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(items[i], q.poll());
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}
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}
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/**
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* all elements successfully put are contained
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*/
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public void testPut() {
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LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
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Item[] items = defaultItems;
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(i, q.size());
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q.put(items[i]);
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mustContain(q, items[i]);
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}
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}
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/**
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* take retrieves elements in FIFO order
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*/
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public void testTake() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(i, q.take());
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}
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}
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/**
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* take removes existing elements until empty, then blocks interruptibly
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*/
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public void testBlockingTake() throws InterruptedException {
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final BlockingQueue<Item> q = populatedQueue(SIZE);
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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for (int i = 0; i < SIZE; i++) mustEqual(i, q.take());
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Thread.currentThread().interrupt();
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try {
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q.take();
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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pleaseInterrupt.countDown();
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try {
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q.take();
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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}});
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await(pleaseInterrupt);
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
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t.interrupt();
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awaitTermination(t);
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}
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/**
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* poll succeeds unless empty
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*/
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public void testPoll() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(i, q.poll());
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}
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assertNull(q.poll());
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checkEmpty(q);
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}
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/**
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* timed poll with zero timeout succeeds when non-empty, else times out
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*/
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public void testTimedPoll0() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(i, q.poll(0, MILLISECONDS));
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}
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assertNull(q.poll(0, MILLISECONDS));
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checkEmpty(q);
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}
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/**
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* timed poll with nonzero timeout succeeds when non-empty, else times out
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*/
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public void testTimedPoll() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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long startTime = System.nanoTime();
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for (int i = 0; i < SIZE; ++i)
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mustEqual(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
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startTime = System.nanoTime();
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assertNull(q.poll(timeoutMillis(), MILLISECONDS));
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
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checkEmpty(q);
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}
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/**
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* Interrupted timed poll throws InterruptedException instead of
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* returning timeout status
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*/
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public void testInterruptedTimedPoll() throws InterruptedException {
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final BlockingQueue<Item> q = populatedQueue(SIZE);
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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for (int i = 0; i < SIZE; i++)
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mustEqual(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
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Thread.currentThread().interrupt();
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try {
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q.poll(randomTimeout(), randomTimeUnit());
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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pleaseInterrupt.countDown();
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try {
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q.poll(LONGER_DELAY_MS, MILLISECONDS);
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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}});
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await(pleaseInterrupt);
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
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t.interrupt();
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awaitTermination(t);
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checkEmpty(q);
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}
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/**
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* timed poll after thread interrupted throws InterruptedException
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* instead of returning timeout status
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*/
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public void testTimedPollAfterInterrupt() throws InterruptedException {
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final BlockingQueue<Item> q = populatedQueue(SIZE);
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Thread t = newStartedThread(new CheckedRunnable() {
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public void realRun() throws InterruptedException {
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Thread.currentThread().interrupt();
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for (int i = 0; i < SIZE; ++i)
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mustEqual(i, q.poll(randomTimeout(), randomTimeUnit()));
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try {
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q.poll(randomTimeout(), randomTimeUnit());
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shouldThrow();
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} catch (InterruptedException success) {}
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assertFalse(Thread.interrupted());
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}});
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awaitTermination(t);
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checkEmpty(q);
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}
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/**
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* peek returns next element, or null if empty
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*/
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public void testPeek() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(i, q.peek());
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mustEqual(i, q.poll());
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assertTrue(q.peek() == null ||
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i != q.peek().value);
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}
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assertNull(q.peek());
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checkEmpty(q);
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}
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/**
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* element returns next element, or throws NoSuchElementException if empty
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*/
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public void testElement() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(i, q.element());
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mustEqual(i, q.poll());
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}
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try {
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q.element();
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shouldThrow();
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} catch (NoSuchElementException success) {}
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checkEmpty(q);
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}
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/**
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* remove removes next element, or throws NoSuchElementException if empty
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*/
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public void testRemove() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustEqual(i, q.remove());
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}
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try {
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q.remove();
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shouldThrow();
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} catch (NoSuchElementException success) {}
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checkEmpty(q);
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}
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/**
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* An add following remove(x) succeeds
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*/
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public void testRemoveElementAndAdd() throws InterruptedException {
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LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
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mustAdd(q, one);
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mustAdd(q, two);
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mustRemove(q, one);
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mustRemove(q, two);
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mustAdd(q, three);
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mustEqual(q.take(), three);
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}
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/**
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* contains(x) reports true when elements added but not yet removed
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*/
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public void testContains() {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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mustContain(q, i);
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mustEqual(i, q.poll());
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mustNotContain(q, i);
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}
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}
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/**
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* clear removes all elements
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*/
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public void testClear() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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q.clear();
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checkEmpty(q);
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mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
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q.add(one);
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assertFalse(q.isEmpty());
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mustEqual(1, q.size());
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mustContain(q, one);
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q.clear();
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checkEmpty(q);
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}
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/**
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* containsAll(c) is true when c contains a subset of elements
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*/
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public void testContainsAll() {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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LinkedTransferQueue<Item> p = new LinkedTransferQueue<>();
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for (int i = 0; i < SIZE; ++i) {
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assertTrue(q.containsAll(p));
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assertFalse(p.containsAll(q));
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mustAdd(p, i);
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}
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assertTrue(p.containsAll(q));
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}
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/**
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* retainAll(c) retains only those elements of c and reports true
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* if changed
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*/
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public void testRetainAll() {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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LinkedTransferQueue<Item> p = populatedQueue(SIZE);
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for (int i = 0; i < SIZE; ++i) {
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boolean changed = q.retainAll(p);
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if (i == 0) {
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assertFalse(changed);
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} else {
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assertTrue(changed);
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}
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assertTrue(q.containsAll(p));
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mustEqual(SIZE - i, q.size());
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p.remove();
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}
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}
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/**
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* removeAll(c) removes only those elements of c and reports true
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* if changed
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*/
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public void testRemoveAll() {
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for (int i = 1; i < SIZE; ++i) {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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LinkedTransferQueue<Item> p = populatedQueue(i);
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assertTrue(q.removeAll(p));
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mustEqual(SIZE - i, q.size());
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for (int j = 0; j < i; ++j) {
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mustNotContain(q, p.remove());
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}
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}
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}
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/**
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* toArray() contains all elements in FIFO order
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*/
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public void testToArray() {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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Object[] a = q.toArray();
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assertSame(Object[].class, a.getClass());
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for (Object o : a)
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assertSame(o, q.poll());
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assertTrue(q.isEmpty());
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}
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/**
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* toArray(a) contains all elements in FIFO order
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*/
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public void testToArray2() {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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Item[] items = new Item[SIZE];
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Item[] array = q.toArray(items);
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assertSame(items, array);
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for (Item o : items)
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assertSame(o, q.poll());
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assertTrue(q.isEmpty());
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}
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|
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/**
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* toArray(incompatible array type) throws ArrayStoreException
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*/
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@SuppressWarnings("CollectionToArraySafeParameter")
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public void testToArray_incompatibleArrayType() {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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try {
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q.toArray(new String[10]);
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shouldThrow();
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} catch (ArrayStoreException success) {}
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}
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|
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/**
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* iterator iterates through all elements
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*/
|
|
public void testIterator() throws InterruptedException {
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LinkedTransferQueue<Item> q = populatedQueue(SIZE);
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|
Iterator<? extends Item> it = q.iterator();
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int i;
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for (i = 0; it.hasNext(); i++)
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mustContain(q, it.next());
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mustEqual(i, SIZE);
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assertIteratorExhausted(it);
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it = q.iterator();
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for (i = 0; it.hasNext(); i++)
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mustEqual(it.next(), q.take());
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mustEqual(i, SIZE);
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assertIteratorExhausted(it);
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}
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|
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/**
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* iterator of empty collection has no elements
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*/
|
|
public void testEmptyIterator() {
|
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assertIteratorExhausted(new LinkedTransferQueue().iterator());
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}
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|
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/**
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* iterator.remove() removes current element
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*/
|
|
public void testIteratorRemove() {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
q.add(two);
|
|
q.add(one);
|
|
q.add(three);
|
|
|
|
Iterator<? extends Item> it = q.iterator();
|
|
it.next();
|
|
it.remove();
|
|
|
|
it = q.iterator();
|
|
assertSame(it.next(), one);
|
|
assertSame(it.next(), three);
|
|
assertFalse(it.hasNext());
|
|
}
|
|
|
|
/**
|
|
* iterator ordering is FIFO
|
|
*/
|
|
public void testIteratorOrdering() {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
|
|
q.add(one);
|
|
q.add(two);
|
|
q.add(three);
|
|
mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
|
|
int k = 0;
|
|
for (Item n : q) {
|
|
mustEqual(++k, n);
|
|
}
|
|
mustEqual(3, k);
|
|
}
|
|
|
|
/**
|
|
* Modifications do not cause iterators to fail
|
|
*/
|
|
public void testWeaklyConsistentIteration() {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
q.add(one);
|
|
q.add(two);
|
|
q.add(three);
|
|
for (Iterator<? extends Item> it = q.iterator(); it.hasNext();) {
|
|
q.remove();
|
|
it.next();
|
|
}
|
|
mustEqual(0, q.size());
|
|
}
|
|
|
|
/**
|
|
* toString contains toStrings of elements
|
|
*/
|
|
public void testToString() {
|
|
LinkedTransferQueue<Item> q = populatedQueue(SIZE);
|
|
String s = q.toString();
|
|
for (int i = 0; i < SIZE; ++i) {
|
|
assertTrue(s.contains(String.valueOf(i)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* offer transfers elements across Executor tasks
|
|
*/
|
|
public void testOfferInExecutor() {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
final CheckedBarrier threadsStarted = new CheckedBarrier(2);
|
|
final ExecutorService executor = Executors.newFixedThreadPool(2);
|
|
try (PoolCleaner cleaner = cleaner(executor)) {
|
|
|
|
executor.execute(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
threadsStarted.await();
|
|
long startTime = System.nanoTime();
|
|
assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
|
|
}});
|
|
|
|
executor.execute(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
threadsStarted.await();
|
|
assertSame(one, q.take());
|
|
checkEmpty(q);
|
|
}});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* timed poll retrieves elements across Executor threads
|
|
*/
|
|
public void testPollInExecutor() {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
final CheckedBarrier threadsStarted = new CheckedBarrier(2);
|
|
final ExecutorService executor = Executors.newFixedThreadPool(2);
|
|
try (PoolCleaner cleaner = cleaner(executor)) {
|
|
|
|
executor.execute(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
assertNull(q.poll());
|
|
threadsStarted.await();
|
|
long startTime = System.nanoTime();
|
|
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
|
|
checkEmpty(q);
|
|
}});
|
|
|
|
executor.execute(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
threadsStarted.await();
|
|
q.put(one);
|
|
}});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A deserialized/reserialized queue has same elements in same order
|
|
*/
|
|
public void testSerialization() throws Exception {
|
|
Queue<Item> x = populatedQueue(SIZE);
|
|
Queue<Item> y = serialClone(x);
|
|
|
|
assertNotSame(y, x);
|
|
mustEqual(x.size(), y.size());
|
|
mustEqual(x.toString(), y.toString());
|
|
assertTrue(Arrays.equals(x.toArray(), y.toArray()));
|
|
while (!x.isEmpty()) {
|
|
assertFalse(y.isEmpty());
|
|
mustEqual(x.remove(), y.remove());
|
|
}
|
|
assertTrue(y.isEmpty());
|
|
}
|
|
|
|
/**
|
|
* drainTo(c) empties queue into another collection c
|
|
*/
|
|
public void testDrainTo() {
|
|
LinkedTransferQueue<Item> q = populatedQueue(SIZE);
|
|
ArrayList l = new ArrayList();
|
|
q.drainTo(l);
|
|
mustEqual(0, q.size());
|
|
mustEqual(SIZE, l.size());
|
|
for (int i = 0; i < SIZE; ++i) {
|
|
mustEqual(i, l.get(i));
|
|
}
|
|
q.add(zero);
|
|
q.add(one);
|
|
assertFalse(q.isEmpty());
|
|
mustContain(q, zero);
|
|
mustContain(q, one);
|
|
l.clear();
|
|
q.drainTo(l);
|
|
mustEqual(0, q.size());
|
|
mustEqual(2, l.size());
|
|
for (int i = 0; i < 2; ++i) {
|
|
mustEqual(i, l.get(i));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drainTo(c) empties full queue, unblocking a waiting put.
|
|
*/
|
|
public void testDrainToWithActivePut() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = populatedQueue(SIZE);
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
q.put(new Item(SIZE + 1));
|
|
}});
|
|
ArrayList l = new ArrayList();
|
|
q.drainTo(l);
|
|
assertTrue(l.size() >= SIZE);
|
|
for (int i = 0; i < SIZE; ++i)
|
|
mustEqual(i, l.get(i));
|
|
awaitTermination(t);
|
|
assertTrue(q.size() + l.size() >= SIZE);
|
|
}
|
|
|
|
/**
|
|
* drainTo(c, n) empties first min(n, size) elements of queue into c
|
|
*/
|
|
public void testDrainToN() {
|
|
LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
for (int i = 0; i < SIZE + 2; ++i) {
|
|
for (int j = 0; j < SIZE; j++) {
|
|
mustOffer(q, j);
|
|
}
|
|
ArrayList l = new ArrayList();
|
|
q.drainTo(l, i);
|
|
int k = (i < SIZE) ? i : SIZE;
|
|
mustEqual(k, l.size());
|
|
mustEqual(SIZE - k, q.size());
|
|
for (int j = 0; j < k; ++j)
|
|
mustEqual(j, l.get(j));
|
|
do {} while (q.poll() != null);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* timed poll() or take() increments the waiting consumer count;
|
|
* offer(e) decrements the waiting consumer count
|
|
*/
|
|
public void testWaitingConsumer() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
mustEqual(0, q.getWaitingConsumerCount());
|
|
assertFalse(q.hasWaitingConsumer());
|
|
final CountDownLatch threadStarted = new CountDownLatch(1);
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
threadStarted.countDown();
|
|
long startTime = System.nanoTime();
|
|
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
|
|
mustEqual(0, q.getWaitingConsumerCount());
|
|
assertFalse(q.hasWaitingConsumer());
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
|
|
}});
|
|
|
|
threadStarted.await();
|
|
Callable<Boolean> oneConsumer = new Callable<>() {
|
|
public Boolean call() {
|
|
return q.hasWaitingConsumer()
|
|
&& q.getWaitingConsumerCount() == 1; }};
|
|
waitForThreadToEnterWaitState(t, oneConsumer);
|
|
|
|
assertTrue(q.offer(one));
|
|
mustEqual(0, q.getWaitingConsumerCount());
|
|
assertFalse(q.hasWaitingConsumer());
|
|
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* transfer(null) throws NullPointerException
|
|
*/
|
|
public void testTransfer1() throws InterruptedException {
|
|
try {
|
|
LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
q.transfer(null);
|
|
shouldThrow();
|
|
} catch (NullPointerException success) {}
|
|
}
|
|
|
|
/**
|
|
* transfer waits until a poll occurs. The transferred element
|
|
* is returned by the associated poll.
|
|
*/
|
|
public void testTransfer2() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
final CountDownLatch threadStarted = new CountDownLatch(1);
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
threadStarted.countDown();
|
|
q.transfer(five);
|
|
checkEmpty(q);
|
|
}});
|
|
|
|
threadStarted.await();
|
|
Callable<Boolean> oneElement = new Callable<>() {
|
|
public Boolean call() {
|
|
return !q.isEmpty() && q.size() == 1; }};
|
|
waitForThreadToEnterWaitState(t, oneElement);
|
|
|
|
assertSame(five, q.poll());
|
|
checkEmpty(q);
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* transfer waits until a poll occurs, and then transfers in fifo order
|
|
*/
|
|
public void testTransfer3() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
|
|
Thread first = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
q.transfer(four);
|
|
mustNotContain(q, four);
|
|
mustEqual(1, q.size());
|
|
}});
|
|
|
|
Thread interruptedThread = newStartedThread(
|
|
new CheckedInterruptedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
while (q.isEmpty())
|
|
Thread.yield();
|
|
q.transfer(five);
|
|
}});
|
|
|
|
while (q.size() < 2)
|
|
Thread.yield();
|
|
mustEqual(2, q.size());
|
|
assertSame(four, q.poll());
|
|
first.join();
|
|
mustEqual(1, q.size());
|
|
interruptedThread.interrupt();
|
|
interruptedThread.join();
|
|
checkEmpty(q);
|
|
}
|
|
|
|
/**
|
|
* transfer waits until a poll occurs, at which point the polling
|
|
* thread returns the element
|
|
*/
|
|
public void testTransfer4() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
q.transfer(four);
|
|
mustNotContain(q, four);
|
|
assertSame(three, q.poll());
|
|
}});
|
|
|
|
while (q.isEmpty())
|
|
Thread.yield();
|
|
assertFalse(q.isEmpty());
|
|
mustEqual(1, q.size());
|
|
assertTrue(q.offer(three));
|
|
assertSame(four, q.poll());
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* transfer waits until a take occurs. The transferred element
|
|
* is returned by the associated take.
|
|
*/
|
|
public void testTransfer5() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
q.transfer(four);
|
|
checkEmpty(q);
|
|
}});
|
|
|
|
while (q.isEmpty())
|
|
Thread.yield();
|
|
assertFalse(q.isEmpty());
|
|
mustEqual(1, q.size());
|
|
assertSame(four, q.take());
|
|
checkEmpty(q);
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* tryTransfer(null) throws NullPointerException
|
|
*/
|
|
public void testTryTransfer1() {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
try {
|
|
q.tryTransfer(null);
|
|
shouldThrow();
|
|
} catch (NullPointerException success) {}
|
|
}
|
|
|
|
/**
|
|
* tryTransfer returns false and does not enqueue if there are no
|
|
* consumers waiting to poll or take.
|
|
*/
|
|
public void testTryTransfer2() throws InterruptedException {
|
|
final LinkedTransferQueue<Object> q = new LinkedTransferQueue<>();
|
|
assertFalse(q.tryTransfer(new Object()));
|
|
assertFalse(q.hasWaitingConsumer());
|
|
checkEmpty(q);
|
|
}
|
|
|
|
/**
|
|
* If there is a consumer waiting in timed poll, tryTransfer
|
|
* returns true while successfully transfering object.
|
|
*/
|
|
public void testTryTransfer3() throws InterruptedException {
|
|
final Object hotPotato = new Object();
|
|
final LinkedTransferQueue<Object> q = new LinkedTransferQueue<>();
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
while (! q.hasWaitingConsumer())
|
|
Thread.yield();
|
|
assertTrue(q.hasWaitingConsumer());
|
|
checkEmpty(q);
|
|
assertTrue(q.tryTransfer(hotPotato));
|
|
}});
|
|
|
|
long startTime = System.nanoTime();
|
|
assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
|
|
checkEmpty(q);
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* If there is a consumer waiting in take, tryTransfer returns
|
|
* true while successfully transfering object.
|
|
*/
|
|
public void testTryTransfer4() throws InterruptedException {
|
|
final Object hotPotato = new Object();
|
|
final LinkedTransferQueue<Object> q = new LinkedTransferQueue<>();
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() {
|
|
while (! q.hasWaitingConsumer())
|
|
Thread.yield();
|
|
assertTrue(q.hasWaitingConsumer());
|
|
checkEmpty(q);
|
|
assertTrue(q.tryTransfer(hotPotato));
|
|
}});
|
|
|
|
assertSame(q.take(), hotPotato);
|
|
checkEmpty(q);
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* tryTransfer blocks interruptibly if no takers
|
|
*/
|
|
public void testTryTransfer5() throws InterruptedException {
|
|
final LinkedTransferQueue<Object> q = new LinkedTransferQueue<>();
|
|
final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
|
|
assertTrue(q.isEmpty());
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
Thread.currentThread().interrupt();
|
|
try {
|
|
q.tryTransfer(new Object(), randomTimeout(), randomTimeUnit());
|
|
shouldThrow();
|
|
} catch (InterruptedException success) {}
|
|
assertFalse(Thread.interrupted());
|
|
|
|
pleaseInterrupt.countDown();
|
|
try {
|
|
q.tryTransfer(new Object(), LONGER_DELAY_MS, MILLISECONDS);
|
|
shouldThrow();
|
|
} catch (InterruptedException success) {}
|
|
assertFalse(Thread.interrupted());
|
|
}});
|
|
|
|
await(pleaseInterrupt);
|
|
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
|
|
t.interrupt();
|
|
awaitTermination(t);
|
|
checkEmpty(q);
|
|
}
|
|
|
|
/**
|
|
* tryTransfer gives up after the timeout and returns false
|
|
*/
|
|
public void testTryTransfer6() throws InterruptedException {
|
|
final LinkedTransferQueue<Object> q = new LinkedTransferQueue<>();
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
long startTime = System.nanoTime();
|
|
assertFalse(q.tryTransfer(new Object(),
|
|
timeoutMillis(), MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
|
|
checkEmpty(q);
|
|
}});
|
|
|
|
awaitTermination(t);
|
|
checkEmpty(q);
|
|
}
|
|
|
|
/**
|
|
* tryTransfer waits for any elements previously in to be removed
|
|
* before transfering to a poll or take
|
|
*/
|
|
public void testTryTransfer7() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
assertTrue(q.offer(four));
|
|
|
|
Thread t = newStartedThread(new CheckedRunnable() {
|
|
public void realRun() throws InterruptedException {
|
|
long startTime = System.nanoTime();
|
|
assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
|
|
checkEmpty(q);
|
|
}});
|
|
|
|
while (q.size() != 2)
|
|
Thread.yield();
|
|
mustEqual(2, q.size());
|
|
assertSame(four, q.poll());
|
|
assertSame(five, q.poll());
|
|
checkEmpty(q);
|
|
awaitTermination(t);
|
|
}
|
|
|
|
/**
|
|
* tryTransfer attempts to enqueue into the queue and fails
|
|
* returning false not enqueueing and the successive poll is null
|
|
*/
|
|
public void testTryTransfer8() throws InterruptedException {
|
|
final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
assertTrue(q.offer(four));
|
|
mustEqual(1, q.size());
|
|
long startTime = System.nanoTime();
|
|
assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
|
|
mustEqual(1, q.size());
|
|
assertSame(four, q.poll());
|
|
assertNull(q.poll());
|
|
checkEmpty(q);
|
|
}
|
|
|
|
private LinkedTransferQueue<Item> populatedQueue(int n) {
|
|
LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
|
|
checkEmpty(q);
|
|
for (int i = 0; i < n; i++) {
|
|
mustEqual(i, q.size());
|
|
mustOffer(q, i);
|
|
mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
|
|
}
|
|
assertFalse(q.isEmpty());
|
|
return q;
|
|
}
|
|
|
|
/**
|
|
* remove(null), contains(null) always return false
|
|
*/
|
|
public void testNeverContainsNull() {
|
|
Collection<?>[] qs = {
|
|
new LinkedTransferQueue<>(),
|
|
populatedQueue(2),
|
|
};
|
|
|
|
for (Collection<?> q : qs) {
|
|
assertFalse(q.contains(null));
|
|
assertFalse(q.remove(null));
|
|
}
|
|
}
|
|
}
|