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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* 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
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test LFMultiThreadCachingTest
* @bug 8046703
* @summary Test verifies that lambda forms are cached when run with multiple threads
* @author kshefov
* @library /lib/testlibrary/jsr292 /lib/testlibrary
* @build TestMethods
* @build LambdaFormTestCase
* @build LFCachingTestCase
* @build LFMultiThreadCachingTest
* @run main/othervm/timeout=300 LFMultiThreadCachingTest
*/
import java.lang.invoke.MethodHandle;
import java.util.EnumSet;
import java.util.Map;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.CyclicBarrier;
/**
* Multiple threaded lambda forms caching test class.
*/
public final class LFMultiThreadCachingTest extends LFCachingTestCase {
private static final TestMethods.Kind[] KINDS;
static {
EnumSet<TestMethods.Kind> set = EnumSet.complementOf(EnumSet.of(TestMethods.Kind.EXCEPT));
KINDS = set.toArray(new TestMethods.Kind[set.size()]);
if (KINDS.length < 2) {
throw new Error("TESTBUG: KINDS.length[" + KINDS.length + "] should be at least 2");
}
}
private static final int CORES = Math.max(KINDS.length, Runtime.getRuntime().availableProcessors());
/**
* Constructor a for multiple threaded lambda forms caching test case.
*
* @param testMethod A method from {@code j.l.i.MethodHandles} class that
* returns a {@code j.l.i.MethodHandle} instance.
*/
public LFMultiThreadCachingTest(TestMethods testMethod) {
super(testMethod);
}
@Override
public void doTest() {
Map<String, Object> data = getTestMethod().getTestCaseData();
ConcurrentLinkedQueue<MethodHandle> adapters = new ConcurrentLinkedQueue<>();
CyclicBarrier begin = new CyclicBarrier(CORES);
CountDownLatch end = new CountDownLatch(CORES);
for (int i = 0; i < CORES; ++i) {
TestMethods.Kind kind = KINDS[i % KINDS.length];
new Thread(() -> {
try {
begin.await();
adapters.add(getTestMethod().getTestCaseMH(data, kind));
} catch (InterruptedException | BrokenBarrierException | IllegalAccessException | NoSuchMethodException ex) {
throw new Error("Unexpected exception: ", ex);
} finally {
end.countDown();
}
}).start();
}
try {
end.await();
} catch (InterruptedException ex) {
throw new Error("Unexpected exception: ", ex);
}
if (adapters.size() < CORES) {
throw new Error("adapters size[" + adapters.size() + "] is less than " + CORES);
}
MethodHandle prev = adapters.poll();
for (MethodHandle current : adapters) {
checkLFCaching(prev, current);
prev = current;
}
}
/**
* Main routine for multiple threaded lambda forms caching test.
*
* @param args Accepts no arguments.
*/
public static void main(String[] args) {
LambdaFormTestCase.runTests(LFMultiThreadCachingTest::new, EnumSet.allOf(TestMethods.class));
}
}
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