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/*
* Copyright (c) 2023, 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.
*/
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import impl.SimpleResolverProviderImpl;
import org.testng.Assert;
import org.testng.annotations.Test;
/*
* @test
* @summary Test that stale InetAddress caching security properties work as
* expected when a custom resolver is installed.
* @library lib providers/simple
* @build test.library/testlib.ResolutionRegistry
* simple.provider/impl.SimpleResolverProviderImpl AddressesStaleCachingTest
* @run testng/othervm -Djava.security.properties=${test.src}/props/CacheStale.props AddressesStaleCachingTest
*/
public class AddressesStaleCachingTest {
private static class Lookup {
private final byte[] address;
private final long timestamp;
private Lookup(byte[] address, long timestamp) {
this.address = address;
this.timestamp = timestamp;
}
}
/**
* Validates successful and unsuccessful lookups when the stale cache is
* enabled.
*/
@Test
public void testRefresh() throws Exception{
// The first request is to save the data into the cache
Lookup first = doLookup(false, 0);
Thread.sleep(10000); // intentionally big delay > x2 stale property
// The refreshTime is expired, we will do the successful lookup.
Lookup second = doLookup(false, 0);
Assert.assertNotEquals(first.timestamp, second.timestamp,
"Two lookups are expected");
Thread.sleep(10000); // intentionally big delay > x2 stale property
// The refreshTime is expired again, we will do the failed lookup.
Lookup third = doLookup(true, 0);
Assert.assertNotEquals(second.timestamp, third.timestamp,
"Two lookups are expected");
// The stale cache is enabled, so we should get valid/same data for
// all requests(even for the failed request).
Assert.assertEquals(first.address, second.address,
"Same address is expected");
Assert.assertEquals(second.address, third.address,
"Same address is expected");
}
/**
* Validates that only one thread is blocked during "refresh", all others
* will continue to use the "stale" data.
*/
@Test
public void testOnlyOneThreadIsBlockedDuringRefresh() throws Exception {
long timeout = System.nanoTime() + TimeUnit.SECONDS.toNanos(12);
doLookup(false, timeout);
Thread.sleep(9000);
CountDownLatch blockServer = new CountDownLatch(1);
SimpleResolverProviderImpl.setBlocker(blockServer);
Thread ts[] = new Thread[10];
CountDownLatch wait9 = new CountDownLatch(ts.length - 1);
CountDownLatch wait10 = new CountDownLatch(ts.length);
CountDownLatch start = new CountDownLatch(ts.length);
for (int i = 0; i < ts.length; i++) {
ts[i] = new Thread(() -> {
start.countDown();
try {
start.await();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
doLookup(true, timeout);
wait9.countDown();
wait10.countDown();
});
}
for (Thread t : ts) {
t.start();
}
if (!wait9.await(10, TimeUnit.SECONDS)) {
blockServer.countDown();
throw new RuntimeException("Some threads hang");
}
blockServer.countDown();
if (!wait10.await(10, TimeUnit.SECONDS)) {
throw new RuntimeException("The last thread hangs");
}
}
private static Lookup doLookup(boolean error, long timeout) {
SimpleResolverProviderImpl.setUnreachableServer(error);
try {
byte[] firstAddress = InetAddress.getByName("javaTest.org").getAddress();
long firstTimestamp = SimpleResolverProviderImpl.getLastLookupTimestamp();
byte[] secondAddress = InetAddress.getByName("javaTest.org").getAddress();
long secondTimestamp = SimpleResolverProviderImpl.getLastLookupTimestamp();
Assert.assertEquals(firstAddress, secondAddress,
"Same address is expected");
if (timeout == 0 || timeout - System.nanoTime() > 0) {
Assert.assertEquals(firstTimestamp, secondTimestamp,
"Only one positive lookup is expected with caching enabled");
}
return new Lookup(firstAddress, firstTimestamp);
} catch (UnknownHostException e) {
throw new RuntimeException(e);
}
}
}
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