/**
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.aurora.scheduler.preemptor;
import java.util.Map;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import org.apache.aurora.common.quantity.Amount;
import org.apache.aurora.common.quantity.Time;
import org.apache.aurora.common.util.testing.FakeClock;
import org.apache.aurora.scheduler.preemptor.BiCache.BiCacheSettings;
import org.apache.aurora.scheduler.testing.FakeStatsProvider;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class BiCacheTest {
private static final Amount<Long, Time> HOLD_DURATION = Amount.of(1L, Time.MINUTES);
private static final String CACHE_NAME = "TEST";
private static final String CACHE_SIZE_STAT_NAME = "TEST_cache_size";
private static final String CACHE_REMOVAL_STAT_NAME = "TEST_cache_removals";
private static final String CACHE_EXPLICIT_REMOVAL_STAT_NAME = "TEST_cache_explicit_removals";
private static final String CACHE_EXPIRATION_REMOVAL_STAT_NAME = "TEST_cache_expiration_removals";
private static final String KEY_1 = "Key 1";
private static final String KEY_2 = "Key 2";
private static final Optional<Integer> NO_VALUE = Optional.absent();
private FakeStatsProvider statsProvider;
private FakeClock clock;
private BiCache<String, Integer> biCache;
@Before
public void setUp() {
statsProvider = new FakeStatsProvider();
clock = new FakeClock();
biCache = new BiCache<>(statsProvider, new BiCacheSettings(HOLD_DURATION, CACHE_NAME), clock);
}
@Test
public void testExpiration() {
biCache.put(KEY_1, 1);
assertEquals(Optional.of(1), biCache.get(KEY_1));
assertEquals(1L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_REMOVAL_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_EXPIRATION_REMOVAL_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_EXPLICIT_REMOVAL_STAT_NAME));
clock.advance(HOLD_DURATION);
assertEquals(NO_VALUE, biCache.get(KEY_1));
assertEquals(ImmutableSet.of(), biCache.getByValue(1));
assertEquals(0L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
assertEquals(1L, statsProvider.getLongValue(CACHE_REMOVAL_STAT_NAME));
assertEquals(1L, statsProvider.getLongValue(CACHE_EXPIRATION_REMOVAL_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_EXPLICIT_REMOVAL_STAT_NAME));
}
@Test
public void testRemoval() {
biCache.put(KEY_1, 1);
assertEquals(1L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_REMOVAL_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_EXPIRATION_REMOVAL_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_EXPLICIT_REMOVAL_STAT_NAME));
assertEquals(Optional.of(1), biCache.get(KEY_1));
assertEquals(NO_VALUE, biCache.get(KEY_2));
biCache.remove(KEY_1, 1);
assertEquals(NO_VALUE, biCache.get(KEY_1));
assertEquals(0L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
assertEquals(1L, statsProvider.getLongValue(CACHE_REMOVAL_STAT_NAME));
assertEquals(0L, statsProvider.getLongValue(CACHE_EXPIRATION_REMOVAL_STAT_NAME));
assertEquals(1L, statsProvider.getLongValue(CACHE_EXPLICIT_REMOVAL_STAT_NAME));
}
@Test(expected = NullPointerException.class)
public void testRemovalWithNullKey() {
biCache.remove(null, 1);
}
@Test
public void testDifferentKeysIdenticalValues() {
biCache.put(KEY_1, 1);
biCache.put(KEY_2, 1);
assertEquals(2L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
assertEquals(Optional.of(1), biCache.get(KEY_1));
assertEquals(Optional.of(1), biCache.get(KEY_2));
assertEquals(ImmutableSet.of(KEY_1, KEY_2), biCache.getByValue(1));
biCache.remove(KEY_1, 1);
assertEquals(NO_VALUE, biCache.get(KEY_1));
assertEquals(Optional.of(1), biCache.get(KEY_2));
assertEquals(ImmutableSet.of(KEY_2), biCache.getByValue(1));
assertEquals(1L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
clock.advance(HOLD_DURATION);
assertEquals(NO_VALUE, biCache.get(KEY_1));
assertEquals(NO_VALUE, biCache.get(KEY_2));
assertEquals(ImmutableSet.of(), biCache.getByValue(1));
assertEquals(0L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
}
@Test
public void testIdenticalKeysDifferentValues() {
biCache.put(KEY_1, 1);
biCache.put(KEY_1, 2);
assertEquals(Optional.of(2), biCache.get(KEY_1));
assertEquals(ImmutableSet.of(), biCache.getByValue(1));
assertEquals(ImmutableSet.of(KEY_1), biCache.getByValue(2));
assertEquals(1L, statsProvider.getLongValue(CACHE_SIZE_STAT_NAME));
}
@Test
public void testAsMap() {
biCache.put(KEY_1, 1);
assertEquals(Optional.of(1), biCache.get(KEY_1));
Map<String, Integer> map = biCache.asMap();
biCache.put(KEY_1, 2);
assertEquals(ImmutableMap.of(KEY_1, 1), map);
}
}