| 1 |
/* |
| 2 |
* Written by Martin Buchholz and Doug Lea with assistance from |
| 3 |
* members of JCP JSR-166 Expert Group and released to the public |
| 4 |
* domain, as explained at |
| 5 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
| 6 |
*/ |
| 7 |
|
| 8 |
/* |
| 9 |
* @test |
| 10 |
* @summary Should be able to shutdown a pool when worker creation failed. |
| 11 |
* @library /lib/testlibrary/ |
| 12 |
*/ |
| 13 |
|
| 14 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| 15 |
|
| 16 |
import java.util.concurrent.LinkedBlockingQueue; |
| 17 |
import java.util.concurrent.ThreadFactory; |
| 18 |
import java.util.concurrent.ThreadPoolExecutor; |
| 19 |
import java.util.concurrent.TimeUnit; |
| 20 |
import jdk.testlibrary.Utils; |
| 21 |
|
| 22 |
public class FlakyThreadFactory { |
| 23 |
static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000); |
| 24 |
|
| 25 |
void test(String[] args) throws Throwable { |
| 26 |
test(NullPointerException.class, |
| 27 |
new ThreadFactory() { |
| 28 |
public Thread newThread(Runnable r) { |
| 29 |
throw new NullPointerException(); |
| 30 |
}}); |
| 31 |
test(OutOfMemoryError.class, |
| 32 |
new ThreadFactory() { |
| 33 |
@SuppressWarnings("DeadThread") |
| 34 |
public Thread newThread(Runnable r) { |
| 35 |
// We expect this to throw OOME, but ... |
| 36 |
new Thread(null, r, "a natural OOME", 1L << 60); |
| 37 |
// """On some platforms, the value of the stackSize |
| 38 |
// parameter may have no effect whatsoever.""" |
| 39 |
throw new OutOfMemoryError("artificial OOME"); |
| 40 |
}}); |
| 41 |
test(null, |
| 42 |
new ThreadFactory() { |
| 43 |
public Thread newThread(Runnable r) { |
| 44 |
return null; |
| 45 |
}}); |
| 46 |
} |
| 47 |
|
| 48 |
void test(final Class<?> exceptionClass, |
| 49 |
final ThreadFactory failingThreadFactory) |
| 50 |
throws Throwable { |
| 51 |
ThreadFactory flakyThreadFactory = new ThreadFactory() { |
| 52 |
int seq = 0; |
| 53 |
public Thread newThread(Runnable r) { |
| 54 |
if (seq++ < 4) |
| 55 |
return new Thread(r); |
| 56 |
else |
| 57 |
return failingThreadFactory.newThread(r); |
| 58 |
}}; |
| 59 |
ThreadPoolExecutor pool = |
| 60 |
new ThreadPoolExecutor(10, 10, |
| 61 |
0L, TimeUnit.SECONDS, |
| 62 |
new LinkedBlockingQueue(), |
| 63 |
flakyThreadFactory); |
| 64 |
try { |
| 65 |
for (int i = 0; i < 8; i++) |
| 66 |
pool.submit(new Runnable() { public void run() {} }); |
| 67 |
check(exceptionClass == null); |
| 68 |
} catch (Throwable t) { |
| 69 |
/* t.printStackTrace(); */ |
| 70 |
check(exceptionClass.isInstance(t)); |
| 71 |
} |
| 72 |
pool.shutdown(); |
| 73 |
check(pool.awaitTermination(LONG_DELAY_MS, MILLISECONDS)); |
| 74 |
} |
| 75 |
|
| 76 |
//--------------------- Infrastructure --------------------------- |
| 77 |
volatile int passed = 0, failed = 0; |
| 78 |
void pass() {passed++;} |
| 79 |
void fail() {failed++; Thread.dumpStack();} |
| 80 |
void fail(String msg) {System.err.println(msg); fail();} |
| 81 |
void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| 82 |
void check(boolean cond) {if (cond) pass(); else fail();} |
| 83 |
void equal(Object x, Object y) { |
| 84 |
if (x == null ? y == null : x.equals(y)) pass(); |
| 85 |
else fail(x + " not equal to " + y);} |
| 86 |
public static void main(String[] args) throws Throwable { |
| 87 |
new FlakyThreadFactory().instanceMain(args);} |
| 88 |
public void instanceMain(String[] args) throws Throwable { |
| 89 |
try {test(args);} catch (Throwable t) {unexpected(t);} |
| 90 |
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| 91 |
if (failed > 0) throw new AssertionError("Some tests failed");} |
| 92 |
} |
