| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.client.util; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import org.eclipse.jetty.util.Callback; |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class DeferredContentProviderTest |
| { |
| private ExecutorService executor; |
| |
| @Before |
| public void prepare() throws Exception |
| { |
| executor = Executors.newCachedThreadPool(); |
| } |
| |
| @After |
| public void dispose() throws Exception |
| { |
| executor.shutdownNow(); |
| } |
| |
| @Test |
| public void testWhenEmptyFlushDoesNotBlock() throws Exception |
| { |
| final DeferredContentProvider provider = new DeferredContentProvider(); |
| |
| Future<?> task = executor.submit(new Callable<Object>() |
| { |
| @Override |
| public Object call() throws Exception |
| { |
| provider.flush(); |
| return null; |
| } |
| }); |
| |
| Assert.assertTrue(await(task, 5, TimeUnit.SECONDS)); |
| } |
| |
| @Test |
| public void testOfferFlushBlocksUntilSucceeded() throws Exception |
| { |
| final DeferredContentProvider provider = new DeferredContentProvider(); |
| Iterator<ByteBuffer> iterator = provider.iterator(); |
| |
| provider.offer(ByteBuffer.allocate(0)); |
| |
| Future<?> task = executor.submit(new Callable<Object>() |
| { |
| @Override |
| public Object call() throws Exception |
| { |
| provider.flush(); |
| return null; |
| } |
| }); |
| |
| // Wait until flush() blocks. |
| Assert.assertFalse(await(task, 1, TimeUnit.SECONDS)); |
| |
| // Consume the content and succeed the callback. |
| iterator.next(); |
| ((Callback)iterator).succeeded(); |
| |
| // Flush should return. |
| Assert.assertTrue(await(task, 5, TimeUnit.SECONDS)); |
| } |
| |
| @Test |
| public void testCloseFlushDoesNotBlock() throws Exception |
| { |
| final DeferredContentProvider provider = new DeferredContentProvider(); |
| |
| provider.close(); |
| |
| Future<?> task = executor.submit(new Callable<Object>() |
| { |
| @Override |
| public Object call() throws Exception |
| { |
| provider.flush(); |
| return null; |
| } |
| }); |
| |
| // Wait until flush() blocks. |
| Assert.assertTrue(await(task, 5, TimeUnit.SECONDS)); |
| } |
| |
| @Test |
| public void testCloseNextHasNextReturnsFalse() throws Exception |
| { |
| DeferredContentProvider provider = new DeferredContentProvider(); |
| Iterator<ByteBuffer> iterator = provider.iterator(); |
| |
| provider.close(); |
| |
| Assert.assertFalse(iterator.hasNext()); |
| |
| try |
| { |
| iterator.next(); |
| Assert.fail(); |
| } |
| catch (NoSuchElementException x) |
| { |
| // Expected |
| } |
| |
| Assert.assertFalse(iterator.hasNext()); |
| } |
| |
| private boolean await(Future<?> task, long time, TimeUnit unit) throws Exception |
| { |
| try |
| { |
| task.get(time, unit); |
| return true; |
| } |
| catch (TimeoutException x) |
| { |
| return false; |
| } |
| } |
| } |