| // |
| // ======================================================================== |
| // 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.util; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.List; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.LinkedBlockingQueue; |
| |
| import org.eclipse.jetty.toolchain.test.AdvancedRunner; |
| import org.eclipse.jetty.toolchain.test.FS; |
| import org.eclipse.jetty.toolchain.test.MavenTestingUtils; |
| import org.eclipse.jetty.toolchain.test.OS; |
| import org.eclipse.jetty.toolchain.test.annotation.Slow; |
| import org.eclipse.jetty.util.Scanner.Notification; |
| import org.junit.AfterClass; |
| import org.junit.Assert; |
| import org.junit.Assume; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| @RunWith(AdvancedRunner.class) |
| public class ScannerTest |
| { |
| static File _directory; |
| static Scanner _scanner; |
| static BlockingQueue<Event> _queue = new LinkedBlockingQueue<Event>(); |
| static BlockingQueue<List<String>> _bulk = new LinkedBlockingQueue<List<String>>(); |
| |
| @BeforeClass |
| public static void setUpBeforeClass() throws Exception |
| { |
| _directory = MavenTestingUtils.getTargetTestingDir(ScannerTest.class.getSimpleName()); |
| FS.ensureEmpty(_directory); |
| |
| _scanner = new Scanner(); |
| _scanner.addScanDir(_directory); |
| _scanner.setScanInterval(0); |
| _scanner.addListener(new Scanner.DiscreteListener() |
| { |
| public void fileRemoved(String filename) throws Exception |
| { |
| _queue.add(new Event(filename,Notification.REMOVED)); |
| } |
| |
| public void fileChanged(String filename) throws Exception |
| { |
| _queue.add(new Event(filename,Notification.CHANGED)); |
| } |
| |
| public void fileAdded(String filename) throws Exception |
| { |
| _queue.add(new Event(filename,Notification.ADDED)); |
| } |
| }); |
| _scanner.addListener(new Scanner.BulkListener() |
| { |
| public void filesChanged(List<String> filenames) throws Exception |
| { |
| _bulk.add(filenames); |
| } |
| }); |
| _scanner.start(); |
| |
| _scanner.scan(); |
| |
| Assert.assertTrue(_queue.isEmpty()); |
| Assert.assertTrue(_bulk.isEmpty()); |
| } |
| |
| @AfterClass |
| public static void tearDownAfterClass() throws Exception |
| { |
| _scanner.stop(); |
| IO.delete(_directory); |
| } |
| |
| static class Event |
| { |
| String _filename; |
| Scanner.Notification _notification; |
| |
| public Event(String filename, Notification notification) |
| { |
| _filename=filename; |
| _notification=notification; |
| } |
| } |
| |
| @Test |
| @Slow |
| public void testAddedChangeRemove() throws Exception |
| { |
| // TODO needs to be further investigated |
| Assume.assumeTrue(!OS.IS_WINDOWS); |
| |
| touch("a0"); |
| |
| // takes 2 scans to notice a0 and check that it is stable |
| _scanner.scan(); |
| _scanner.scan(); |
| Event event = _queue.poll(); |
| Assert.assertNotNull("Event should not be null", event); |
| Assert.assertEquals(_directory+"/a0",event._filename); |
| Assert.assertEquals(Notification.ADDED,event._notification); |
| |
| // add 3 more files |
| Thread.sleep(1100); // make sure time in seconds changes |
| touch("a1"); |
| touch("a2"); |
| touch("a3"); |
| |
| // not stable after 1 scan so should not be seen yet. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event==null); |
| |
| // Keep a2 unstable and remove a3 before it stabalized |
| Thread.sleep(1100); // make sure time in seconds changes |
| touch("a2"); |
| delete("a3"); |
| |
| // only a1 is stable so it should be seen. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/a1",event._filename); |
| Assert.assertEquals(Notification.ADDED,event._notification); |
| Assert.assertTrue(_queue.isEmpty()); |
| |
| // Now a2 is stable |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/a2",event._filename); |
| Assert.assertEquals(Notification.ADDED,event._notification); |
| Assert.assertTrue(_queue.isEmpty()); |
| |
| // We never see a3 as it was deleted before it stabalised |
| |
| // touch a1 and a2 |
| Thread.sleep(1100); // make sure time in seconds changes |
| touch("a1"); |
| touch("a2"); |
| // not stable after 1scan so nothing should not be seen yet. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event==null); |
| |
| // Keep a2 unstable |
| Thread.sleep(1100); // make sure time in seconds changes |
| touch("a2"); |
| |
| // only a1 is stable so it should be seen. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/a1",event._filename); |
| Assert.assertEquals(Notification.CHANGED,event._notification); |
| Assert.assertTrue(_queue.isEmpty()); |
| |
| // Now a2 is stable |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/a2",event._filename); |
| Assert.assertEquals(Notification.CHANGED,event._notification); |
| Assert.assertTrue(_queue.isEmpty()); |
| |
| |
| // delete a1 and a2 |
| delete("a1"); |
| delete("a2"); |
| // not stable after 1scan so nothing should not be seen yet. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event==null); |
| |
| // readd a2 |
| touch("a2"); |
| |
| // only a1 is stable so it should be seen. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/a1",event._filename); |
| Assert.assertEquals(Notification.REMOVED,event._notification); |
| Assert.assertTrue(_queue.isEmpty()); |
| |
| // Now a2 is stable and is a changed file rather than a remove |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/a2",event._filename); |
| Assert.assertEquals(Notification.CHANGED,event._notification); |
| Assert.assertTrue(_queue.isEmpty()); |
| |
| } |
| |
| @Test |
| public void testSizeChange() throws Exception |
| { |
| // TODO needs to be further investigated |
| Assume.assumeTrue(!OS.IS_WINDOWS); |
| |
| touch("tsc0"); |
| _scanner.scan(); |
| _scanner.scan(); |
| |
| // takes 2s to notice tsc0 and check that it is stable. This syncs us with the scan |
| Event event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/tsc0",event._filename); |
| Assert.assertEquals(Notification.ADDED,event._notification); |
| |
| |
| // Create a new file by writing to it. |
| long now = System.currentTimeMillis(); |
| File file = new File(_directory,"st"); |
| try (OutputStream out = new FileOutputStream(file,true)) |
| { |
| out.write('x'); |
| out.flush(); |
| file.setLastModified(now); |
| |
| // Not stable yet so no notification. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event==null); |
| |
| // Modify size only |
| out.write('x'); |
| out.flush(); |
| file.setLastModified(now); |
| |
| // Still not stable yet so no notification. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event==null); |
| |
| // now stable so finally see the ADDED |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/st",event._filename); |
| Assert.assertEquals(Notification.ADDED,event._notification); |
| |
| // Modify size only |
| out.write('x'); |
| out.flush(); |
| file.setLastModified(now); |
| |
| |
| // Still not stable yet so no notification. |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event==null); |
| |
| // now stable so finally see the ADDED |
| _scanner.scan(); |
| event = _queue.poll(); |
| Assert.assertTrue(event!=null); |
| Assert.assertEquals(_directory+"/st",event._filename); |
| Assert.assertEquals(Notification.CHANGED,event._notification); |
| } |
| } |
| |
| private void delete(String string) throws IOException |
| { |
| File file = new File(_directory,string); |
| if (file.exists()) |
| IO.delete(file); |
| } |
| |
| private void touch(String string) throws IOException |
| { |
| File file = new File(_directory,string); |
| if (file.exists()) |
| file.setLastModified(System.currentTimeMillis()); |
| else |
| file.createNewFile(); |
| } |
| } |