show the removal listener of HotEntryCache is not called on expire

This commit is contained in:
2019-08-18 09:27:18 +02:00
parent 3252fcf42d
commit 0dc908c79c

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@@ -1,301 +1,30 @@
//package org.lucares.utils.cache; package org.lucares.utils.cache;
//
//import java.time.Duration; import java.time.Duration;
//import java.time.Instant; import java.util.concurrent.CountDownLatch;
//import java.util.ArrayList; import java.util.concurrent.TimeUnit;
//import java.util.Arrays;
//import java.util.List; import org.testng.Assert;
//import java.util.concurrent.CompletableFuture; import org.testng.annotations.Test;
//import java.util.concurrent.CountDownLatch;
//import java.util.concurrent.ExecutionException; @Test
//import java.util.concurrent.ExecutorService; public class HotEntryCacheTest {
//import java.util.concurrent.Executors;
//import java.util.concurrent.TimeUnit; @Test(invocationCount = 1)
//import java.util.concurrent.TimeoutException; public void testRemovalListenerCalledOnExpire() throws InterruptedException
// {
//import org.apache.logging.log4j.Level; final String key = "key";
//import org.apache.logging.log4j.core.config.Configurator; final String value ="value";
//import org.lucares.utils.cache.HotEntryCache.EventType; final CountDownLatch latch = new CountDownLatch(1);
//import org.testng.Assert;
//import org.testng.annotations.Test; final HotEntryCache<String, String> cache = new HotEntryCache<>(Duration.ofMillis(10), 10);
// cache.addListener((k, v) -> {
//@Test Assert.assertEquals(k, key);
//public class HotEntryCacheTest { Assert.assertEquals(v, value);
// public void testPutAndGet() throws InterruptedException, ExecutionException, TimeoutException { latch.countDown();
// final HotEntryCache<String, String> cache = new HotEntryCache<>(Duration.ofSeconds(10)); });
//
// final String replacedNull = cache.put("key", "value1"); cache.put(key, value);
// Assert.assertEquals(replacedNull, null); Assert.assertTrue(latch.await(100, TimeUnit.MILLISECONDS), "removal listener called");
// }
// final String cachedValue1 = cache.get("key"); }
// Assert.assertEquals(cachedValue1, "value1");
//
// final String replacedValue1 = cache.put("key", "value2");
// Assert.assertEquals(replacedValue1, "value1");
//
// final String cachedValue2 = cache.get("key");
// Assert.assertEquals(cachedValue2, "value2");
// }
//
// public void testPutTouches() throws InterruptedException, ExecutionException, TimeoutException {
// final ModifiableFixedTimeClock clock = new ModifiableFixedTimeClock();
// final Duration timeToLive = Duration.ofSeconds(10);
// final HotEntryCache<String, String> cache = new HotEntryCache<>(timeToLive, clock);
//
// cache.put("key", "value1");
//
// clock.plusSeconds(2);
// cache.updateTime();
//
// cache.put("key", "value2");
//
// clock.plus(timeToLive.minusSeconds(1));
// cache.triggerEvictionAndWait();
// // at this point the entry would have been evicted it it was not touched by the
// // second put.
//
// final String cachedValue2 = cache.get("key");
// Assert.assertEquals(cachedValue2, "value2");
//
// clock.plus(timeToLive.plusSeconds(1));
// // time elapsed since the last put: timeToLive +1s
// cache.triggerEvictionAndWait();
//
// final String cachedValue1_evicted = cache.get("key");
// Assert.assertEquals(cachedValue1_evicted, null);
// }
//
// public void testGetTouches() throws Exception {
// final ModifiableFixedTimeClock clock = new ModifiableFixedTimeClock();
// final Duration timeToLive = Duration.ofSeconds(10);
// final HotEntryCache<String, String> cache = new HotEntryCache<>(timeToLive, clock);
//
// cache.put("key", "value1");
//
// // skip forward in time, but do not yet trigger eviction
// clock.plus(timeToLive.plusMillis(1));
// cache.updateTime();
//
// cache.get("key"); // will touch the entry
//
// cache.triggerEvictionAndWait(); // if get didn't touch, then this will evict the entry
//
// final String cachedValue1 = cache.get("key");
// Assert.assertEquals(cachedValue1, "value1");
// }
//
// public void testEvictionByBackgroundThread() throws InterruptedException, ExecutionException, TimeoutException {
// final ModifiableFixedTimeClock clock = new ModifiableFixedTimeClock();
// final Duration timeToLive = Duration.ofSeconds(10);
// final HotEntryCache<String, String> cache = new HotEntryCache<>(timeToLive, clock);
//
// final CompletableFuture<String> evictionEventFuture = new CompletableFuture<>();
// cache.addListener(event -> {
// evictionEventFuture.complete(event.getValue());
// }, EventType.EVICTED);
//
// cache.put("key", "value1");
//
// clock.plus(timeToLive.minusSeconds(1));
// cache.updateTime();
//
// cache.put("key2", "value2");
// clock.plus(Duration.ofSeconds(1).plusMillis(1));
// cache.triggerEvictionAndWait();
//
// final String evictedValue1 = evictionEventFuture.get(5, TimeUnit.MINUTES); // enough time for debugging
// Assert.assertEquals(evictedValue1, "value1");
// }
//
// public void testRemove() throws InterruptedException, ExecutionException, TimeoutException {
// final HotEntryCache<String, String> cache = new HotEntryCache<>(Duration.ofSeconds(10));
//
// final List<String> removedValues = new ArrayList<>();
// cache.addListener(event -> removedValues.add(event.getValue()), EventType.REMOVED);
//
// cache.put("key", "value1");
//
// final String removedValue = cache.remove("key");
// Assert.assertEquals(removedValue, "value1");
//
// Assert.assertEquals(removedValues, Arrays.asList("value1"));
//
// Assert.assertEquals(cache.get("key"), null);
// }
//
// public void testClear() throws InterruptedException, ExecutionException, TimeoutException {
// final HotEntryCache<String, String> cache = new HotEntryCache<>(Duration.ofSeconds(10));
//
// final List<String> removedValues = new ArrayList<>();
// cache.addListener(event -> removedValues.add(event.getValue()), EventType.REMOVED);
//
// cache.put("key1", "value1");
// cache.put("key2", "value2");
//
// cache.clear();
//
// Assert.assertEquals(cache.get("key1"), null);
// Assert.assertEquals(cache.get("key2"), null);
//
// Assert.assertEquals(removedValues, Arrays.asList("value1", "value2"));
// }
//
// public void testForEachTouches() throws InterruptedException, ExecutionException, TimeoutException {
// final ModifiableFixedTimeClock clock = new ModifiableFixedTimeClock();
// final Duration timeToLive = Duration.ofSeconds(10);
// final HotEntryCache<String, String> cache = new HotEntryCache<>(timeToLive, clock);
//
// final CompletableFuture<String> evictionEventFuture = new CompletableFuture<>();
// cache.addListener(event -> {
// evictionEventFuture.complete(event.getValue());
// }, EventType.EVICTED);
//
// // add value
// cache.put("key", "value1");
//
// // seek, so that it is almost evicted
// clock.plus(timeToLive.minusMillis(1));
// cache.updateTime();
//
// // the for each should touch the entries
// cache.forEach(s -> {
// /* no-op */});
//
// // seek again
// clock.plus(timeToLive.minusMillis(1));
// cache.triggerEvictionAndWait();
//
// // if the touch didn't happen, then the value is now evicted
// Assert.assertEquals(evictionEventFuture.isDone(), false);
//
// // seek again, so that the entry will get evicted
// clock.plus(timeToLive.minusMillis(1));
// cache.triggerEvictionAndWait();
//
// Assert.assertEquals(cache.get("key"), null);
// }
//
// /**
// * Checks that
// * {@link HotEntryCache#putIfAbsent(Object, java.util.function.Function)
// * putIfAbsent} is atomic by calling
// * {@link HotEntryCache#putIfAbsent(Object, java.util.function.Function)
// * putIfAbsent} in two threads and asserting that the supplier was only called
// * once.
// *
// * @throws Exception
// */
// public void testPutIfAbsentIsAtomic() throws Exception {
// final HotEntryCache<String, String> cache = new HotEntryCache<>(Duration.ofSeconds(10));
//
// final ExecutorService pool = Executors.newCachedThreadPool();
// try {
// final CountDownLatch latch = new CountDownLatch(1);
//
// final String key = "key";
// final String valueA = "A";
// final String valueB = "B";
//
// pool.submit(() -> {
// cache.putIfAbsent(key, k -> {
// latch.countDown();
// sleep(TimeUnit.MILLISECONDS, 20);
// return valueA;
// });
// return null;
// });
// pool.submit(() -> {
// waitFor(latch);
// cache.putIfAbsent(key, k -> valueB);
// return null;
// });
//
// pool.shutdown();
// pool.awaitTermination(1, TimeUnit.MINUTES);
//
// final String actual = cache.get(key);
// Assert.assertEquals(actual, valueA);
// } finally {
// pool.shutdownNow();
// }
// }
//
// public void testPutIfAbsentReturnsExistingValue() throws Exception {
// final HotEntryCache<String, String> cache = new HotEntryCache<>(Duration.ofSeconds(10));
//
// final String key = "key";
// final String valueA = "A";
// final String valueB = "B";
//
// cache.put(key, valueA);
//
// final String returnedByPutIfAbsent = cache.putIfAbsent(key, k -> valueB);
// Assert.assertEquals(returnedByPutIfAbsent, valueA);
//
// final String actualInCache = cache.get(key);
// Assert.assertEquals(actualInCache, valueA);
// }
//
// public void testPutIfAbsentDoesNotAddNull() throws Exception {
// final HotEntryCache<String, String> cache = new HotEntryCache<>(Duration.ofSeconds(10));
//
// final String key = "key";
// final String returnedByPutIfAbsent = cache.putIfAbsent(key, k -> null);
// Assert.assertNull(returnedByPutIfAbsent, null);
//
// final String actualInCache = cache.get(key);
// Assert.assertEquals(actualInCache, null);
// }
//
// private void sleep(final TimeUnit timeUnit, final long timeout) {
// try {
// timeUnit.sleep(timeout);
// } catch (final InterruptedException e) {
// throw new IllegalStateException(e);
// }
// }
//
// private void waitFor(final CountDownLatch latch) {
// try {
// latch.await(1, TimeUnit.MINUTES);
// } catch (final InterruptedException e) {
// throw new IllegalStateException(e);
// }
// }
//
// public static void main(final String[] args) throws InterruptedException {
//
// Configurator.setRootLevel(Level.TRACE);
//
// final Duration timeToLive = Duration.ofSeconds(1);
// final HotEntryCache<String, String> cache = new HotEntryCache<>(timeToLive);
//
// cache.addListener(event -> {
// System.out.println(Instant.now() + " evicting: " + event);
// }, EventType.EVICTED);
// cache.put("key", "value that is touched");
// for (int i = 0; i < 20; i++) {
//
// System.out.println(Instant.now() + " putting value" + i);
// cache.put("key" + i, "value" + i);
// cache.put("key", "value that is touched" + i);
// TimeUnit.MILLISECONDS.sleep(450);
// }
//
// for (int i = 20; i < 23; i++) {
// System.out.println(Instant.now() + " putting value" + i);
// cache.put("key" + i, "value" + i);
// TimeUnit.MILLISECONDS.sleep(Duration.ofSeconds(5).plusMillis(10).toMillis());
// }
//
// TimeUnit.MILLISECONDS.sleep(Duration.ofSeconds(5).plusMillis(10).toMillis());
//
// for (int i = 23; i < 27; i++) {
// System.out.println(Instant.now() + " putting value" + i);
// cache.put("key" + i, "value" + i);
// TimeUnit.MILLISECONDS.sleep(Duration.ofSeconds(5).plusMillis(10).toMillis());
// }
//
// TimeUnit.SECONDS.sleep(300);
// }
//}