undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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516
test/jdk/java/nio/file/WatchService/Basic.java
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516
test/jdk/java/nio/file/WatchService/Basic.java
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@ -0,0 +1,516 @@
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/*
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* Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved.
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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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/* @test
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* @bug 4313887 6838333 7017446 8011537 8042470
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* @summary Unit test for java.nio.file.WatchService
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* @library ..
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* @run main Basic
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*/
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import java.nio.file.*;
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import static java.nio.file.StandardWatchEventKinds.*;
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import java.nio.file.attribute.*;
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import java.io.*;
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import java.util.*;
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import java.util.concurrent.TimeUnit;
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/**
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* Unit test for WatchService that exercises all methods in various scenarios.
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*/
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public class Basic {
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static void checkKey(WatchKey key, Path dir) {
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if (!key.isValid())
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throw new RuntimeException("Key is not valid");
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if (key.watchable() != dir)
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throw new RuntimeException("Unexpected watchable");
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}
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static void takeExpectedKey(WatchService watcher, WatchKey expected) {
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System.out.println("take events...");
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WatchKey key;
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try {
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key = watcher.take();
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} catch (InterruptedException x) {
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// not expected
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throw new RuntimeException(x);
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}
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if (key != expected)
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throw new RuntimeException("removed unexpected key");
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}
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static void checkExpectedEvent(Iterable<WatchEvent<?>> events,
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WatchEvent.Kind<?> expectedKind,
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Object expectedContext)
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{
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WatchEvent<?> event = events.iterator().next();
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System.out.format("got event: type=%s, count=%d, context=%s\n",
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event.kind(), event.count(), event.context());
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if (event.kind() != expectedKind)
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throw new RuntimeException("unexpected event");
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if (!expectedContext.equals(event.context()))
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throw new RuntimeException("unexpected context");
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}
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/**
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* Simple test of each of the standard events
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*/
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static void testEvents(Path dir) throws IOException {
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System.out.println("-- Standard Events --");
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FileSystem fs = FileSystems.getDefault();
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Path name = fs.getPath("foo");
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try (WatchService watcher = fs.newWatchService()) {
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// --- ENTRY_CREATE ---
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// register for event
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System.out.format("register %s for ENTRY_CREATE\n", dir);
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WatchKey myKey = dir.register(watcher,
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new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
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checkKey(myKey, dir);
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// create file
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Path file = dir.resolve("foo");
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System.out.format("create %s\n", file);
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Files.createFile(file);
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// remove key and check that we got the ENTRY_CREATE event
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takeExpectedKey(watcher, myKey);
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checkExpectedEvent(myKey.pollEvents(),
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StandardWatchEventKinds.ENTRY_CREATE, name);
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System.out.println("reset key");
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if (!myKey.reset())
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throw new RuntimeException("key has been cancalled");
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System.out.println("OKAY");
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// --- ENTRY_DELETE ---
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System.out.format("register %s for ENTRY_DELETE\n", dir);
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WatchKey deleteKey = dir.register(watcher,
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new WatchEvent.Kind<?>[]{ ENTRY_DELETE });
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if (deleteKey != myKey)
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throw new RuntimeException("register did not return existing key");
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checkKey(deleteKey, dir);
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System.out.format("delete %s\n", file);
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Files.delete(file);
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takeExpectedKey(watcher, myKey);
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checkExpectedEvent(myKey.pollEvents(),
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StandardWatchEventKinds.ENTRY_DELETE, name);
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System.out.println("reset key");
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if (!myKey.reset())
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throw new RuntimeException("key has been cancalled");
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System.out.println("OKAY");
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// create the file for the next test
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Files.createFile(file);
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// --- ENTRY_MODIFY ---
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System.out.format("register %s for ENTRY_MODIFY\n", dir);
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WatchKey newKey = dir.register(watcher,
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new WatchEvent.Kind<?>[]{ ENTRY_MODIFY });
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if (newKey != myKey)
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throw new RuntimeException("register did not return existing key");
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checkKey(newKey, dir);
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System.out.format("update: %s\n", file);
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try (OutputStream out = Files.newOutputStream(file, StandardOpenOption.APPEND)) {
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out.write("I am a small file".getBytes("UTF-8"));
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}
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// remove key and check that we got the ENTRY_MODIFY event
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takeExpectedKey(watcher, myKey);
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checkExpectedEvent(myKey.pollEvents(),
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StandardWatchEventKinds.ENTRY_MODIFY, name);
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System.out.println("OKAY");
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// done
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Files.delete(file);
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}
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}
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/**
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* Check that a cancelled key will never be queued
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*/
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static void testCancel(Path dir) throws IOException {
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System.out.println("-- Cancel --");
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try (WatchService watcher = FileSystems.getDefault().newWatchService()) {
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System.out.format("register %s for events\n", dir);
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WatchKey myKey = dir.register(watcher,
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new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
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checkKey(myKey, dir);
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System.out.println("cancel key");
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myKey.cancel();
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// create a file in the directory
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Path file = dir.resolve("mars");
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System.out.format("create: %s\n", file);
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Files.createFile(file);
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// poll for keys - there will be none
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System.out.println("poll...");
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try {
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WatchKey key = watcher.poll(3000, TimeUnit.MILLISECONDS);
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if (key != null)
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throw new RuntimeException("key should not be queued");
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} catch (InterruptedException x) {
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throw new RuntimeException(x);
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}
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// done
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Files.delete(file);
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System.out.println("OKAY");
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}
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}
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/**
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* Check that deleting a registered directory causes the key to be
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* cancelled and queued.
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*/
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static void testAutomaticCancel(Path dir) throws IOException {
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System.out.println("-- Automatic Cancel --");
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Path subdir = Files.createDirectory(dir.resolve("bar"));
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try (WatchService watcher = FileSystems.getDefault().newWatchService()) {
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System.out.format("register %s for events\n", subdir);
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WatchKey myKey = subdir.register(watcher,
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new WatchEvent.Kind<?>[]{ ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY });
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System.out.format("delete: %s\n", subdir);
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Files.delete(subdir);
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takeExpectedKey(watcher, myKey);
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System.out.println("reset key");
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if (myKey.reset())
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throw new RuntimeException("Key was not cancelled");
|
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if (myKey.isValid())
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throw new RuntimeException("Key is still valid");
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System.out.println("OKAY");
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}
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}
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/**
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* Asynchronous close of watcher causes blocked threads to wakeup
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*/
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static void testWakeup(Path dir) throws IOException {
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System.out.println("-- Wakeup Tests --");
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final WatchService watcher = FileSystems.getDefault().newWatchService();
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Runnable r = new Runnable() {
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public void run() {
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try {
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Thread.sleep(5000);
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System.out.println("close WatchService...");
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watcher.close();
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} catch (InterruptedException x) {
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x.printStackTrace();
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} catch (IOException x) {
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x.printStackTrace();
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}
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}
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};
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// start thread to close watch service after delay
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new Thread(r).start();
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try {
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System.out.println("take...");
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watcher.take();
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throw new RuntimeException("ClosedWatchServiceException not thrown");
|
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} catch (InterruptedException x) {
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throw new RuntimeException(x);
|
||||
} catch (ClosedWatchServiceException x) {
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System.out.println("ClosedWatchServiceException thrown");
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}
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System.out.println("OKAY");
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}
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/**
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* Simple test to check exceptions and other cases
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*/
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@SuppressWarnings("unchecked")
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static void testExceptions(Path dir) throws IOException {
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System.out.println("-- Exceptions and other simple tests --");
|
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WatchService watcher = FileSystems.getDefault().newWatchService();
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try {
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// Poll tests
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WatchKey key;
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System.out.println("poll...");
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key = watcher.poll();
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if (key != null)
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throw new RuntimeException("no keys registered");
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|
||||
System.out.println("poll with timeout...");
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||||
try {
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long start = System.nanoTime();
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key = watcher.poll(3000, TimeUnit.MILLISECONDS);
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if (key != null)
|
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throw new RuntimeException("no keys registered");
|
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long waited = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - start);
|
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if (waited < 2900)
|
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throw new RuntimeException("poll was too short");
|
||||
} catch (InterruptedException x) {
|
||||
throw new RuntimeException(x);
|
||||
}
|
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|
||||
// IllegalArgumentException
|
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System.out.println("IllegalArgumentException tests...");
|
||||
try {
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dir.register(watcher /*empty event list*/);
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throw new RuntimeException("IllegalArgumentException not thrown");
|
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} catch (IllegalArgumentException x) {
|
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}
|
||||
try {
|
||||
// OVERFLOW is ignored so this is equivalent to the empty set
|
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dir.register(watcher, OVERFLOW);
|
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throw new RuntimeException("IllegalArgumentException not thrown");
|
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} catch (IllegalArgumentException x) {
|
||||
}
|
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try {
|
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// OVERFLOW is ignored even if specified multiple times
|
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dir.register(watcher, OVERFLOW, OVERFLOW);
|
||||
throw new RuntimeException("IllegalArgumentException not thrown");
|
||||
} catch (IllegalArgumentException x) {
|
||||
}
|
||||
|
||||
// UnsupportedOperationException
|
||||
try {
|
||||
dir.register(watcher,
|
||||
new WatchEvent.Kind<Object>() {
|
||||
@Override public String name() { return "custom"; }
|
||||
@Override public Class<Object> type() { return Object.class; }
|
||||
});
|
||||
throw new RuntimeException("UnsupportedOperationException not thrown");
|
||||
} catch (UnsupportedOperationException x) {
|
||||
}
|
||||
try {
|
||||
dir.register(watcher,
|
||||
new WatchEvent.Kind<?>[]{ ENTRY_CREATE },
|
||||
new WatchEvent.Modifier() {
|
||||
@Override public String name() { return "custom"; }
|
||||
});
|
||||
throw new RuntimeException("UnsupportedOperationException not thrown");
|
||||
} catch (UnsupportedOperationException x) {
|
||||
}
|
||||
|
||||
// NullPointerException
|
||||
System.out.println("NullPointerException tests...");
|
||||
try {
|
||||
dir.register(null, ENTRY_CREATE);
|
||||
throw new RuntimeException("NullPointerException not thrown");
|
||||
} catch (NullPointerException x) {
|
||||
}
|
||||
try {
|
||||
dir.register(watcher, new WatchEvent.Kind<?>[]{ null });
|
||||
throw new RuntimeException("NullPointerException not thrown");
|
||||
} catch (NullPointerException x) {
|
||||
}
|
||||
try {
|
||||
dir.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE },
|
||||
(WatchEvent.Modifier)null);
|
||||
throw new RuntimeException("NullPointerException not thrown");
|
||||
} catch (NullPointerException x) {
|
||||
}
|
||||
} finally {
|
||||
watcher.close();
|
||||
}
|
||||
|
||||
// -- ClosedWatchServiceException --
|
||||
|
||||
System.out.println("ClosedWatchServiceException tests...");
|
||||
|
||||
try {
|
||||
watcher.poll();
|
||||
throw new RuntimeException("ClosedWatchServiceException not thrown");
|
||||
} catch (ClosedWatchServiceException x) {
|
||||
}
|
||||
|
||||
// assume that poll throws exception immediately
|
||||
long start = System.nanoTime();
|
||||
try {
|
||||
watcher.poll(10000, TimeUnit.MILLISECONDS);
|
||||
throw new RuntimeException("ClosedWatchServiceException not thrown");
|
||||
} catch (InterruptedException x) {
|
||||
throw new RuntimeException(x);
|
||||
} catch (ClosedWatchServiceException x) {
|
||||
long waited = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - start);
|
||||
if (waited > 5000)
|
||||
throw new RuntimeException("poll was too long");
|
||||
}
|
||||
|
||||
try {
|
||||
watcher.take();
|
||||
throw new RuntimeException("ClosedWatchServiceException not thrown");
|
||||
} catch (InterruptedException x) {
|
||||
throw new RuntimeException(x);
|
||||
} catch (ClosedWatchServiceException x) {
|
||||
}
|
||||
|
||||
try {
|
||||
dir.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
|
||||
throw new RuntimeException("ClosedWatchServiceException not thrown");
|
||||
} catch (ClosedWatchServiceException x) {
|
||||
}
|
||||
|
||||
System.out.println("OKAY");
|
||||
}
|
||||
|
||||
/**
|
||||
* Test that directory can be registered with more than one watch service
|
||||
* and that events don't interfere with each other
|
||||
*/
|
||||
static void testTwoWatchers(Path dir) throws IOException {
|
||||
System.out.println("-- Two watchers test --");
|
||||
|
||||
FileSystem fs = FileSystems.getDefault();
|
||||
WatchService watcher1 = fs.newWatchService();
|
||||
WatchService watcher2 = fs.newWatchService();
|
||||
try {
|
||||
Path name1 = fs.getPath("gus1");
|
||||
Path name2 = fs.getPath("gus2");
|
||||
|
||||
// create gus1
|
||||
Path file1 = dir.resolve(name1);
|
||||
System.out.format("create %s\n", file1);
|
||||
Files.createFile(file1);
|
||||
|
||||
// register with both watch services (different events)
|
||||
System.out.println("register for different events");
|
||||
WatchKey key1 = dir.register(watcher1,
|
||||
new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
|
||||
WatchKey key2 = dir.register(watcher2,
|
||||
new WatchEvent.Kind<?>[]{ ENTRY_DELETE });
|
||||
|
||||
if (key1 == key2)
|
||||
throw new RuntimeException("keys should be different");
|
||||
|
||||
// create gus2
|
||||
Path file2 = dir.resolve(name2);
|
||||
System.out.format("create %s\n", file2);
|
||||
Files.createFile(file2);
|
||||
|
||||
// check that key1 got ENTRY_CREATE
|
||||
takeExpectedKey(watcher1, key1);
|
||||
checkExpectedEvent(key1.pollEvents(),
|
||||
StandardWatchEventKinds.ENTRY_CREATE, name2);
|
||||
|
||||
// check that key2 got zero events
|
||||
WatchKey key = watcher2.poll();
|
||||
if (key != null)
|
||||
throw new RuntimeException("key not expected");
|
||||
|
||||
// delete gus1
|
||||
Files.delete(file1);
|
||||
|
||||
// check that key2 got ENTRY_DELETE
|
||||
takeExpectedKey(watcher2, key2);
|
||||
checkExpectedEvent(key2.pollEvents(),
|
||||
StandardWatchEventKinds.ENTRY_DELETE, name1);
|
||||
|
||||
// check that key1 got zero events
|
||||
key = watcher1.poll();
|
||||
if (key != null)
|
||||
throw new RuntimeException("key not expected");
|
||||
|
||||
// reset for next test
|
||||
key1.reset();
|
||||
key2.reset();
|
||||
|
||||
// change registration with watcher2 so that they are both
|
||||
// registered for the same event
|
||||
System.out.println("register for same event");
|
||||
key2 = dir.register(watcher2, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
|
||||
|
||||
// create file and key2 should be queued
|
||||
System.out.format("create %s\n", file1);
|
||||
Files.createFile(file1);
|
||||
takeExpectedKey(watcher2, key2);
|
||||
checkExpectedEvent(key2.pollEvents(),
|
||||
StandardWatchEventKinds.ENTRY_CREATE, name1);
|
||||
|
||||
System.out.println("OKAY");
|
||||
|
||||
} finally {
|
||||
watcher2.close();
|
||||
watcher1.close();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Test that thread interruped status is preserved upon a call
|
||||
* to register()
|
||||
*/
|
||||
static void testThreadInterrupt(Path dir) throws IOException {
|
||||
System.out.println("-- Thread interrupted status test --");
|
||||
|
||||
FileSystem fs = FileSystems.getDefault();
|
||||
Thread curr = Thread.currentThread();
|
||||
try (WatchService watcher = fs.newWatchService()) {
|
||||
System.out.println("interrupting current thread");
|
||||
curr.interrupt();
|
||||
dir.register(watcher, ENTRY_CREATE);
|
||||
if (!curr.isInterrupted())
|
||||
throw new RuntimeException("thread should remain interrupted");
|
||||
System.out.println("current thread is still interrupted");
|
||||
System.out.println("OKAY");
|
||||
} finally {
|
||||
curr.interrupted();
|
||||
}
|
||||
}
|
||||
|
||||
public static void main(String[] args) throws IOException {
|
||||
Path dir = TestUtil.createTemporaryDirectory();
|
||||
try {
|
||||
|
||||
testEvents(dir);
|
||||
testCancel(dir);
|
||||
testAutomaticCancel(dir);
|
||||
testWakeup(dir);
|
||||
testExceptions(dir);
|
||||
testTwoWatchers(dir);
|
||||
testThreadInterrupt(dir);
|
||||
|
||||
} finally {
|
||||
TestUtil.removeAll(dir);
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue