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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
113 lines
4.4 KiB
Java
113 lines
4.4 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.model.server;
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import static com.google.common.truth.Truth.assertThat;
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import google.registry.model.ofy.Ofy;
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import google.registry.testing.AppEngineRule;
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import google.registry.testing.ExceptionRule;
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import google.registry.testing.FakeClock;
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import google.registry.testing.InjectRule;
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import org.joda.time.Duration;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.JUnit4;
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/** Unit tests for {@link Lock}. */
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@RunWith(JUnit4.class)
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public class LockTest {
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private static final String RESOURCE_NAME = "foo";
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private static final Duration ONE_DAY = Duration.standardDays(1);
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private static final Duration TWO_MILLIS = Duration.millis(2);
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@Rule
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public final AppEngineRule appEngine = AppEngineRule.builder()
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.withDatastore()
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.build();
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@Rule
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public final InjectRule inject = new InjectRule();
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@Rule
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public final ExceptionRule thrown = new ExceptionRule();
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@Test
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public void testReleasedExplicitly() throws Exception {
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Lock lock = Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY);
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assertThat(lock).isNotNull();
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// We can't get it again at the same time.
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY)).isNull();
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// But if we release it, it's available.
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lock.release();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", ONE_DAY)).isNotNull();
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}
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@Test
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public void testReleasedAfterTimeout() throws Exception {
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FakeClock clock = new FakeClock();
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inject.setStaticField(Ofy.class, "clock", clock);
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
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// We can't get it again at the same time.
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNull();
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// A second later we still can't get the lock.
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clock.advanceOneMilli();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNull();
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// But two seconds later we can get it.
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clock.advanceOneMilli();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
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}
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@Test
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public void testTldsAreIndependent() throws Exception {
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Lock lockA = Lock.acquire(getClass(), RESOURCE_NAME, "a", ONE_DAY);
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assertThat(lockA).isNotNull();
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// For a different tld we can still get a lock with the same name.
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Lock lockB = Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY);
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assertThat(lockB).isNotNull();
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// We can't get lockB again at the same time.
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY)).isNull();
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// Releasing lockA has no effect on lockB (even though we are still using the "b" tld).
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lockA.release();
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assertThat(Lock.acquire(getClass(), RESOURCE_NAME, "b", ONE_DAY)).isNull();
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}
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@Test
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public void testQueueing() throws Exception {
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// This should work... there's nothing on the queue.
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Lock lock = Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS);
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assertThat(lock).isNotNull();
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lock.release();
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// Queue up a request from "Object".
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Lock.joinQueue(Object.class, RESOURCE_NAME, "");
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// We can't get the lock because the "requester" is different than what's on the queue.
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assertThat(Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS)).isNull();
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// But this will work because the requester is the same as what's on the queue.
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lock = Lock.acquire(Object.class, RESOURCE_NAME, "", TWO_MILLIS);
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assertThat(lock).isNotNull();
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lock.release();
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// Now the queue is empty again so we can get the lock.
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assertThat(Lock.acquire(String.class, RESOURCE_NAME, "", TWO_MILLIS)).isNotNull();
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}
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@Test
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public void testFailure_emptyResourceName() throws Exception {
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thrown.expect(IllegalArgumentException.class, "resourceName cannot be null or empty");
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Lock.acquire(String.class, "", "", TWO_MILLIS);
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}
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}
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