/*
* Copyright (C) 2005-2012 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see .
*/
package org.alfresco.repo.cache;
import static org.junit.Assert.*;
import org.junit.Test;
/**
* Tests for the DefaultSimpleCache class.
*
* @author Matt Ward
*/
public class DefaultSimpleCacheTest extends SimpleCacheTestBase>
{
@Override
protected DefaultSimpleCache createCache()
{
return new DefaultSimpleCache(100, true, 0, 0, getClass().getName());
}
@Test
public void boundedSizeCache() throws Exception
{
// We'll only keep the LAST 3 items
cache = new DefaultSimpleCache(3, true, 0, 0, getClass().getName());
cache.put(1, "1");
cache.put(2, "2");
cache.put(3, "3");
cache.put(4, "4");
cache.put(5, "5");
// Lost the first item
assertNull(cache.get(1));
assertFalse(cache.contains(1));
// Lost the second item
assertNull(cache.get(2));
assertFalse(cache.contains(2));
// Last three are still present
assertEquals("3", cache.get(3));
assertEquals("4", cache.get(4));
assertEquals("5", cache.get(5));
assertTrue(cache.isUseMaxItems());
}
@Test
public void defaultMaxItems()
{
// maxItems of 0 results in a capacity of Integer.MAX_VALUE - this is to match Hazelcast cache behaviour.
cache = new DefaultSimpleCache(0, true, 0, 0, getClass().getName());
assertEquals(Integer.MAX_VALUE, cache.getMaxItems());
assertTrue(cache.isUseMaxItems());
}
@Test
public void sizeLimitConstructor()
{
cache = new DefaultSimpleCache(123, getClass().getName());
assertEquals(123, cache.getMaxItems());
assertTrue(cache.isUseMaxItems());
}
@Test(expected=IllegalArgumentException.class)
public void noNegativeMaxItems()
{
cache = new DefaultSimpleCache(-1, true, 0, 0, getClass().getName());
}
@Test
public void putAndCheckUpdate()
{
// Put an initial value
cache.put(101, "101");
// Update it
assertEquals(true, cache.putAndCheckUpdate(101, "99101"));
// Check the value really was updated
assertEquals("99101", cache.get(101));
// Precondition: no value for key 102
assertFalse(cache.contains(102));
// Put a value - and test the return
assertEquals(false, cache.putAndCheckUpdate(102, "102"));
assertEquals("102", cache.get(102));
cache.put(103, null);
assertEquals(true, cache.putAndCheckUpdate(103, "103"));
// Repeat the put, this should not be an update
assertEquals(false, cache.putAndCheckUpdate(103, "103"));
assertFalse(cache.contains(104));
assertEquals(false, cache.putAndCheckUpdate(104, null));
// Repeat putting null - still not an update, as we had that value a moment ago.
assertEquals(false, cache.putAndCheckUpdate(104, null));
// Now an update
assertEquals(true, cache.putAndCheckUpdate(104, "104"));
// Another update
assertEquals(true, cache.putAndCheckUpdate(104, "99104"));
// Another update, back to null
assertEquals(true, cache.putAndCheckUpdate(104, null));
// Not an update - still null
assertEquals(false, cache.putAndCheckUpdate(104, null));
cache.remove(104);
assertEquals(false, cache.putAndCheckUpdate(104, "104"));
assertEquals(true, cache.putAndCheckUpdate(104, null));
}
// TODO: Timer-based tests are not ideal. An alternative approach is to factor out the CacheBuilder.newBuilder()
// call to a protected method, override that in this test class to return a mock and use the mock to check
// that the Cache is being configured correctly, e.g. assert that expireAfterWrite(int, TimeUnit) is called.
@Test
public void cachesCanHaveTTL()
{
// TTL of 7 seconds
cache = new DefaultSimpleCache(0, false, 7, 0, getClass().getName());
assertFalse(cache.isUseMaxItems());
cache.put(1, "1");
assertTrue(cache.contains(1));
assertFalse(cache.contains(2));
assertFalse(cache.contains(3));
sleep(5);
cache.put(2, "2");
assertTrue(cache.contains(1));
assertTrue(cache.contains(2));
assertFalse(cache.contains(3));
sleep(5);
cache.put(3, "3");
assertFalse(cache.contains(1));
assertTrue(cache.contains(2)); // Only ~5 seconds have passed for this key
assertTrue(cache.contains(3));
}
@Test
public void cachesCanHaveTTI()
{
cache = new DefaultSimpleCache(0, false, 0, 8, getClass().getName());
assertFalse(cache.isUseMaxItems());
assertEquals(0, cache.getTTLSecs());
assertEquals(8, cache.getMaxIdleSecs());
cache.put(1, "1");
assertEquals("1", cache.get(1));
sleep(4);
// cause zeroing of idle time
assertEquals("1", cache.get(1));
sleep(4);
// cause zeroing of idle time
assertEquals("1", cache.get(1));
sleep(4);
// At least 12 seconds have passed, but the item should still be present.
assertEquals("1", cache.get(1));
sleep(10);
// time-to-idle now exceeded without access
assertNotEquals("1", cache.get(1));
}
private void sleep(int seconds)
{
try
{
Thread.sleep(seconds * 1000);
}
catch (InterruptedException error)
{
throw new RuntimeException(error);
}
}
}