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POWhy setting expireAfterAccess does not work?
 

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    <p>Why does the <code>timedCachetest</code> fails on the last line? Why cache is not empty after 60 seconds?</p> <pre><code>package com.test.cache; import java.util.concurrent.TimeUnit; import junit.framework.Assert; import org.junit.After; import org.junit.Before; import org.junit.Test; import com.google.common.cache.Cache; import com.google.common.cache.CacheBuilder; public class CacheTest { private static final int MAXIMUM_SIZE = 10; private static final int CONCURRENCY_LEVEL = 1; private static final long EXPIRE_AFTER_ACCESS = 60; Cache&lt;String, Thing&gt; cache; private static TimeUnit unit = TimeUnit.SECONDS; private static long sec = 1000; @Before public void setUp() throws Exception { cache = CacheBuilder.newBuilder().maximumSize(MAXIMUM_SIZE).concurrencyLevel(CONCURRENCY_LEVEL).expireAfterAccess(EXPIRE_AFTER_ACCESS, unit).build(); } @After public void tearDown() { cache = null; } @Test public void simpleCachetest() { String key = "key"; Integer hc = key.hashCode(); Thing thing = new Thing(key); cache.put(key, thing); thing = cache.getIfPresent(key); Assert.assertNotNull(thing); Assert.assertEquals(hc, thing.getValue()); Assert.assertEquals(key, thing.getName()); Assert.assertEquals(1, cache.size()); } @Test public void timedCachetest() { String key = "key"; Thing thing = new Thing(key); Assert.assertEquals(0, cache.size()); cache.put(key, thing); Assert.assertEquals(1, cache.size()); try { thing = cache.getIfPresent(key); long millis = 100 * sec; Thread.sleep(millis); // cache.invalidateAll(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } Assert.assertNotNull(thing); Assert.assertEquals(key, thing.getName()); Assert.assertEquals(0, cache.size()); } class Thing { public Thing(String key) { this.name = key; this.value = key.hashCode(); } public String getName() { return name; } public Integer getValue() { return value; } private String name; private Integer value; } } </code></pre>
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