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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
/*
* @test
* @bug 6571655 6571881 6574585 6571297
* @summary Test various args to task scheduling methods
*/
import java.util.*;
import java.util.concurrent.*;
import static java.util.concurrent.TimeUnit.*;
public class Args {
static final long DELAY_MS = 30 * 1000L;
void schedule(final Timer t, final TimerTask task, final Date d) {
t.schedule(task, d);
assertThrows
(IllegalStateException.class,
() -> t.schedule(task, d));
}
void schedule(final Timer t, final TimerTask task, final Date d, final
long period) {
t.schedule(task, d, period);
assertThrows
(IllegalStateException.class,
() -> t.schedule(task, d, period));
}
void scheduleAtFixedRate(final Timer t, final TimerTask task, final
Date d, final long period) {
t.scheduleAtFixedRate(task, d, period);
assertThrows
(IllegalStateException.class,
() -> t.scheduleAtFixedRate(task, d, period));
}
TimerTask counter(final CountDownLatch latch) {
return new TimerTask() { public void run() {
if (latch.getCount() == 0)
fail(String.format("Latch counted down too many times: " +
latch));
latch.countDown();
}};
}
TimerTask nop() {
return new TimerTask() { public void run() { }};
}
void test(String[] args) throws Throwable {
final Timer t = new Timer();
try {
test(t);
} finally {
// Ensure this test doesn't interfere with subsequent
// tests even in case of failure.
t.cancel();
}
// Attempts to schedule tasks on a cancelled Timer result in ISE.
final Date past = new Date(System.currentTimeMillis() - DELAY_MS);
final Date future = new Date(System.currentTimeMillis() + DELAY_MS);
assertThrows
(IllegalStateException.class,
() -> t.schedule(nop(), 42),
() -> t.schedule(nop(), 42),
() -> t.schedule(nop(), past),
() -> t.schedule(nop(), 42, 42),
() -> t.schedule(nop(), past, 42),
() -> t.scheduleAtFixedRate(nop(), 42, 42),
() -> t.scheduleAtFixedRate(nop(), past, 42),
() -> t.scheduleAtFixedRate(nop(), future, 42));
}
void test(Timer t) throws Throwable {
final TimerTask x = new TimerTask() { public void run() {}};
assertThrows
(IllegalArgumentException.class,
() -> t.schedule(x, -42),
() -> t.schedule(x, new Date(-42)),
() -> t.schedule(x, Long.MAX_VALUE),
() -> t.schedule(x, -42, 42),
() -> t.schedule(x, new Date(-42), 42),
() -> t.schedule(x, Long.MAX_VALUE, 42),
() -> t.schedule(x, 42, 0),
() -> t.schedule(x, new Date(42), 0),
() -> t.schedule(x, 42, -42),
() -> t.schedule(x, new Date(42), -42),
() -> t.scheduleAtFixedRate(x, -42, 42),
() -> t.scheduleAtFixedRate(x, new Date(-42), 42),
() -> t.scheduleAtFixedRate(x, Long.MAX_VALUE, 42),
() -> t.scheduleAtFixedRate(x, 42, 0),
() -> t.scheduleAtFixedRate(x, new Date(42), 0),
() -> t.scheduleAtFixedRate(x, 42, -42),
() -> t.scheduleAtFixedRate(x, new Date(42), -42));
assertThrows
(NullPointerException.class,
() -> t.schedule(null, 42),
() -> t.schedule(x, (Date)null),
() -> t.schedule(null, 42, 42),
() -> t.schedule(x, (Date)null, 42),
() -> t.scheduleAtFixedRate(null, 42, 42),
() -> t.scheduleAtFixedRate(x, (Date)null, 42));
// Create local classes for clearer diagnostics in case of failure
class OneShotLatch extends CountDownLatch {
OneShotLatch() { super(1); }
}
class FixedDelayLatch extends CountDownLatch {
FixedDelayLatch() { super(1); }
}
class FixedRateLatch extends CountDownLatch {
FixedRateLatch() { super(11); }
}
final CountDownLatch y1 = new OneShotLatch();
final CountDownLatch y2 = new FixedDelayLatch();
final CountDownLatch y3 = new FixedRateLatch();
final long start = System.currentTimeMillis();
final Date past = new Date(start - (10 * DELAY_MS + DELAY_MS / 2));
schedule( t, counter(y1), past);
schedule( t, counter(y2), past, DELAY_MS);
scheduleAtFixedRate(t, counter(y3), past, DELAY_MS);
check(y1.await(DELAY_MS / 4, MILLISECONDS));
check(y2.await(DELAY_MS / 4, MILLISECONDS));
check(y3.await(DELAY_MS / 4, MILLISECONDS));
final long elapsed = System.currentTimeMillis() - start;
if (elapsed >= DELAY_MS / 2)
fail(String.format("Test took too long: elapsed=%d%n",
elapsed));
}
//--------------------- Infrastructure ---------------------------
volatile int passed = 0, failed = 0;
void pass() {passed++;}
void fail() {failed++; Thread.dumpStack();}
void fail(String msg) {System.err.println(msg); fail();}
void unexpected(Throwable t) {failed++; t.printStackTrace();}
void check(boolean cond) {if (cond) pass(); else fail();}
void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
new Args().instanceMain(args);}
void instanceMain(String[] args) throws Throwable {
try {test(args);} catch (Throwable t) {unexpected(t);}
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
interface F { void f() throws Throwable; }
void assertThrows(Class<? extends Throwable> k, F... fs) {
for (F f : fs)
try {f.f(); fail("Expected " + k.getName() + " not thrown");}
catch (Throwable t) {
if (k.isAssignableFrom(t.getClass())) pass();
else unexpected(t);}}
}